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2025-04-03
发表了主题帖：【米尔-STM32MP257开发板试用体验】音频实时处理_回声消除与降噪应用评估

前言本文评估开发板上进行音频实时处理,移植speex算法，进行回声消除和降噪处理，主要关注算法执行时间。移植speex Speex的移植可以参考公众号文章 https://mp.weixin.qq.com/s/zJPNgyOaKNpIbHfshe6CjQ https://mp.weixin.qq.com/s/-nRwGWvYfl6wtvFSSul1DQ https://mp.weixin.qq.com/s/p6cOppuoFYCTw6a-bu299Q 我这里分享了测试demo， https://github.com/qinyunti/speex_test.git 测试 git clone https://github.com/qinyunti/speex_test.git 编译 source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linux 修改build.sh gcc为$CC chmod +x ./build.sh ./build.sh 导入测试文件到开发板导入程序到开发板 chmod +x speexecho ./speexecho mic3.wav spk3.wav out3.wav 可以看到执行时间大概是1.8mS 导出out3.wav查看波形可以看到回声消除和降噪效果。这里对比其他某个M4F平台N=256点，TAIL=1024需要14~15mS 这里只需要1.8mS，和之前测试的fft的效率比例相当，所以算法主要执行时间就是取决于fft运算时间，当然还有很多内存搬运的时间和平台相关。总结以上可以看到进行16k音频的实时处理，对应时间为16mS，需要算法时间为1.8ms，所以算法完全足够，如果按照48k采样率，数据量变为3倍，按倍数估计也只需要5.4ms，占比16ms也很少，所以进行实时音频处理是毫无压力的。
发表了主题帖：【米尔-STM32MP257开发板试用体验】软件fft测试

本帖最后由 qinyunti 于 2025-4-3 12:33 编辑代码前言后面移植音频处理算法需要大量调用fft算法。其执行时间影响音频算法是否能实时处理，所以我们先来进行实测，评估fft执行时间。刚好前面也评测了一款H系类的M4F核的MCU,可以对比下。移植KISSFFT Kissfft是常用的fft实现库，后面的音频算法中也会使用，所以基于该库进行测试。需要的文件如下 qinyunti@qinyunti:/mnt/d/BaiduSyncdisk/BOARD/ld25x/kissfftt$ tree . . ├── kiss_fft_port.c ├── kiss_fft_port.h ├── kissfft │ ├── _kiss_fft_guts.h │ ├── kfc.c │ ├── kfc.h │ ├── kiss_fft.c │ ├── kiss_fft.h │ ├── kiss_fft_log.h │ ├── kiss_fftnd.c │ ├── kiss_fftnd.h │ ├── kiss_fftndr.c │ ├── kiss_fftndr.h │ ├── kiss_fftr.c │ ├── kiss_fftr.h │ └── kissfft.hh ├── kissfft_test.c └── kissfft_test.h 1 directory, 17 files 其中 kiss_fft_port.c中的kiss_fft_port_malloc和 kiss_fft_port_free使用标准库的malloc和free kiss_fft_port.c中 #include <stddef.h> #include <stdlib.h> void* kiss_fft_port_malloc(size_t size) { return malloc(size); } void kiss_fft_port_free(void* p) { free(p); } kissfft_test.c是测试代码其中事件测量需要获取时间戳 #include <time.h> static uint64_t get_tm(void){ struct timespec ts; clock_gettime(CLOCK_MONOTONIC,&ts); return ts.tv_sec*1000000000ull + ts.tv_nsec; } 编译 $CC kissfft/*.c kiss_fft_port.c kissfft_test.c -I. -Ikissfft -o kissfft_test -lm 测试导入kissfft_test到开发板 chmod +x kissfft_test 执行 ./kissfft_test 256 1000 打印如下 root@myd-ld25x:~# ./kissfft_test 256 1000 [in] 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used:105119450 [FFT] (256.000000,0.000000),(0.000019,-256.000000),(-0.000000,0.000006),(0.000002,0.000007),(-0.000000,0.000003),(0.000000,0.000003),(0.000001,0.000005),(0.000000,0.000002),(-0.000001,0.000003),(-0.000002,-0.000000),(-0.000000,-0.000000),(-0.000000,0.000000),(-0.000002,0.000001),(-0.000001,0.000003),(-0.000000,0.000001),(-0.000002,0.000005),(0.000001,-0.000000),(0.000001,-0.000003),(0.000001,0.000002),(0.000001,0.000002),(-0.000001,0.000000),(-0.000001,-0.000001),(-0.000000,0.000001),(-0.000001,0.000004),(0.000000,0.000001),(-0.000002,-0.000000),(-0.000002,0.000001),(-0.000000,-0.000001),(-0.000001,0.000002),(-0.000001,-0.000000),(-0.000000,0.000002),(-0.000005,0.000003),(0.000000,0.000000),(0.000001,-0.000002),(-0.000004,-0.000001),(-0.000007,-0.000001),(-0.000002,-0.000006),(0.000001,-0.000005),(0.000001,-0.000006),(0.000006,-0.000001),(0.000004,-0.000002),(-0.000001,-0.000000),(-0.000000,0.000000),(-0.000001,0.000003),(0.000002,-0.000002),(0.000003,-0.000003),(-0.000001,0.000001),(-0.000001,0.000002),(0.000001,0.000001),(0.000001,-0.000001),(0.000002,-0.000002),(0.000004,0.000001),(-0.000001,0.000000),(-0.000002,-0.000001),(0.000000,0.000001),(-0.000001,-0.000001),(-0.000001,-0.000000),(0.000001,0.000002),(-0.000001,0.000002),(0.000000,-0.000001),(-0.000000,0.000001),(0.000000,0.000001),(0.000001,-0.000001),(0.000001,-0.000001),(0.000000,0.000000),(0.000001,-0.000001),(0.000001,0.000001),(-0.000000,-0.000002),(0.000000,0.000001),(0.000004,0.000002),(-0.000000,0.000002),(0.000002,-0.000002),(0.000000,0.000006),(-0.000001,0.000001),(-0.000000,0.000007),(0.000000,-0.000003),(-0.000003,0.000003),(-0.000003,-0.000002),(-0.000000,-0.000001),(-0.000000,0.000001),(-0.000001,-0.000000),(-0.000000,0.000005),(-0.000000,-0.000000),(0.000001,-0.000002),(-0.000001,-0.000001),(-0.000001,-0.000000),(0.000001,0.000000),(-0.000001,-0.000001),(0.000000,-0.000002),(-0.000001,0.000002),(-0.000000,0.000000),(0.000000,0.000001),(-0.000000,-0.000001),(0.000001,0.000000),(-0.000001,-0.000000),(-0.000004,-0.000004),(0.000000,0.000000),(0.000001,0.000002),(-0.000002,0.000001),(-0.000000,0.000000),(-0.000000,-0.000001),(-0.000002,0.000000),(-0.000001,-0.000000),(-0.000001,0.000003),(0.000000,-0.000001),(-0.000002,0.000001),(-0.000001,0.000000),(-0.000002,-0.000004),(-0.000001,0.000002),(-0.000001,-0.000004),(0.000001,-0.000002),(0.000004,-0.000001),(0.000002,-0.000002),(-0.000002,-0.000002),(0.000001,0.000003),(-0.000001,-0.000001),(0.000001,0.000001),(0.000001,-0.000002),(-0.000001,0.000000),(0.000002,0.000002),(0.000001,0.000000),(-0.000002,0.000002),(0.000000,0.000000),(0.000000,-0.000001),(-0.000002,-0.000001),(0.000000,-0.000001),(-0.000001,0.000001),(0.000001,0.000008),(0.000000,0.000000),(0.000001,-0.000008),(-0.000001,-0.000001),(0.000000,0.000001),(-0.000002,0.000001),(0.000000,0.000001),(0.000000,-0.000000),(-0.000002,-0.000002),(0.000001,-0.000000),(0.000002,-0.000002),(-0.000001,-0.000000),(0.000001,0.000002),(0.000001,-0.000001),(-0.000001,0.000001),(0.000001,-0.000003),(-0.000002,0.000002),(0.000002,0.000002),(0.000004,0.000001),(0.000001,0.000002),(-0.000001,0.000004),(-0.000001,-0.000002),(-0.000002,0.000004),(-0.000001,-0.000000),(-0.000002,-0.000001),(0.000000,0.000001),(-0.000001,-0.000003),(-0.000001,0.000000),(-0.000002,-0.000000),(-0.000000,0.000001),(-0.000000,-0.000000),(-0.000002,-0.000001),(0.000001,-0.000002),(0.000000,0.000000),(-0.000004,0.000004),(-0.000001,0.000000),(0.000001,-0.000000),(-0.000000,0.000001),(0.000000,-0.000001),(-0.000000,-0.000000),(-0.000001,-0.000002),(0.000000,0.000002),(-0.000001,0.000001),(0.000001,-0.000000),(-0.000001,0.000000),(-0.000001,0.000001),(0.000001,0.000002),(-0.000000,0.000000),(-0.000000,-0.000005),(-0.000001,0.000000),(-0.000000,-0.000001),(-0.000000,0.000001),(-0.000003,0.000002),(-0.000003,-0.000003),(0.000000,0.000003),(-0.000000,-0.000007),(-0.000001,-0.000001),(0.000000,-0.000006),(0.000002,0.000002),(-0.000000,-0.000002),(0.000004,-0.000002),(0.000000,-0.000001),(-0.000000,0.000002),(0.000001,-0.000001),(0.000001,0.000001),(0.000000,0.000000),(0.000001,0.000001),(0.000001,0.000001),(0.000000,-0.000001),(-0.000000,-0.000001),(0.000000,0.000001),(-0.000001,-0.000002),(0.000001,-0.000002),(-0.000001,0.000000),(-0.000001,0.000001),(0.000000,-0.000001),(-0.000002,0.000001),(-0.000001,-0.000000),(0.000004,-0.000001),(0.000002,0.000002),(0.000001,0.000001),(0.000001,-0.000001),(-0.000001,-0.000002),(-0.000001,-0.000001),(0.000003,0.000003),(0.000002,0.000002),(-0.000001,-0.000003),(-0.000000,-0.000000),(-0.000001,0.000000),(0.000004,0.000002),(0.000006,0.000001),(0.000001,0.000006),(0.000001,0.000005),(-0.000002,0.000006),(-0.000007,0.000001),(-0.000004,0.000001),(0.000001,0.000002),(0.000000,0.000000),(-0.000005,-0.000003),(-0.000000,-0.000002),(-0.000001,0.000000),(-0.000001,-0.000002),(-0.000000,0.000001),(-0.000002,-0.000001),(-0.000002,0.000000),(0.000000,-0.000001),(-0.000001,-0.000004),(-0.000000,-0.000001),(-0.000001,0.000001),(-0.000001,-0.000000),(0.000001,-0.0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256点 1000次，用时如下复数fft 复数ifft 105119450ns 97374875ns 实数fft 实数ifft 57727425ns 58225225ns 所以一次实数fft计算大概在58uS左右。对比上面提到的MCU平台，快了5倍以上如果按照-O3编译 $CC kissfft/*.c kiss_fft_port.c kissfft_test.c -I. -Ikissfft -o kissfft_test -lm -O3 则复数fft 复数ifft 19674850ns 19976350ns 实数fft 实数ifft 15674675ns 15648700ns 则一次实数fft计算大概在16uS左右，大概是不优化的1/4。速度是上述MCU平台的17倍。
发表了主题帖：【米尔-STM32MP257开发板试用体验】基于alsa的音频应用开发

基于alsa的音频应用开发获取音频设备驱动信息与录放音测试设备信息查看音频设备信息，如下有两个 cat /proc/asound/cards 0 [ES8388SOUNDCARD]: simple-card - ES8388-SOUND-CARD ES8388-SOUND-CARD 1 [HDMISOUNDCARD ]: HDMI-SOUND-CARD - HDMI-SOUND-CARD HDMI-SOUND-CARD root@myd-ld25x:/etc/myir_test# 查看音频设备文件 ls /dev/snd/ -al total 0 drwxr-xr-x 3 root root 200 3月 3 18:10 . drwxr-xr-x 17 root root 4680 3月 3 18:10 .. drwxr-xr-x 2 root root 80 3月 3 18:10 by-path crw-rw---- 1 root audio 116, 4 3月 3 18:10 controlC0 crw-rw---- 1 root audio 116, 7 3月 3 18:10 controlC1 crw-rw---- 1 root audio 116, 3 3月 3 18:10 pcmC0D0c crw-rw---- 1 root audio 116, 2 3月 3 18:10 pcmC0D0p crw-rw---- 1 root audio 116, 6 3月 3 18:10 pcmC1D0c crw-rw---- 1 root audio 116, 5 3月 3 18:10 pcmC1D0p crw-rw---- 1 root audio 116, 33 3月 3 18:10 timer 所以声卡0对应ES8388， controlC0为ES8388声卡控制 pcmC0D0c读该文件对应ES8388声卡采集后缀c表示capture pcmC0D0p写该文件对应ES8388声卡播放后缀p表示playback 测试先进行录音播放测试,确认硬件OK。连接带MIC的耳机。播放，确认耳机能听到音乐。 cd /etc/myir_test/ ./myir_audio_play ctrl+c退出录音 amixer -c 0 set "Capture ZC" on amixer -c 0 set "Capture Digital" 120 arecord -D hw:0,0 -f cd test.wav Ctrl+c停止录音 aplay -D hw:0,0 test.wav 声卡读写使用alsa库,参考 https://www.alsa-project.org/alsa-doc/alsa-lib/index.html 查看sdk中asoundlib.h头文件位置 qinyunti@qinyunti:~$ find /opt/st/myd-ld25x/4.2.4-snapshot/ -name asoundlib.h find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/etc/polkit-1/rules.d’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/etc/cups/ssl’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/var/spool/cups’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/var/cache/cups’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/var/lib/tee’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/var/lib/sudo’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/home/root’: Permission denied find: ‘/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/usr/share/polkit-1/rules.d’: Permission denied /opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/usr/include/alsa/asoundlib.h /opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/usr/include/asoundlib.h /opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux/usr/include/sys/asoundlib.h qinyunti@qinyunti:~$ 查看板子上lib文件的位置 root@myd-ld25x:/etc/myir_test# find / -name libasound.so.* /usr/lib/libasound.so.2 /usr/lib/libasound.so.2.0.0 root@myd-ld25x:/etc/myir_test# Alsa应用程序开发新建alsa_test.c文件,内容如下 /* * This extra small demo sends a random samples to your speakers. */ #include <alsa/asoundlib.h> static char *device = "default"; /* playback device */ unsigned char buffer[16*1024]; /* some random data */ int main(void) { int err; unsigned int i; snd_pcm_t *handle; snd_pcm_sframes_t frames; for (i = 0; i < sizeof(buffer); i++) buffer[i] = random() & 0xff; if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) { printf("Playback open error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } if ((err = snd_pcm_set_params(handle, SND_PCM_FORMAT_U8, SND_PCM_ACCESS_RW_INTERLEAVED, 1, 48000, 1, 500000)) < 0) { /* 0.5sec */ printf("Playback open error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } for (i = 0; i < 16; i++) { frames = snd_pcm_writei(handle, buffer, sizeof(buffer)); if (frames < 0) frames = snd_pcm_recover(handle, frames, 0); if (frames < 0) { printf("snd_pcm_writei failed: %s\n", snd_strerror(frames)); break; } if (frames > 0 && frames < (long)sizeof(buffer)) printf("Short write (expected %li, wrote %li)\n", (long)sizeof(buffer), frames); } /* pass the remaining samples, otherwise they're dropped in close */ err = snd_pcm_drain(handle); if (err < 0) printf("snd_pcm_drain failed: %s\n", snd_strerror(err)); snd_pcm_close(handle); return 0; } 编译 $CC alsa_test.c -o alsa_test -lasound Cp到win下 cp alsa_test /mnt/d/ Win下使用crt，rz导入到开发板 chmod +x alsa_test ./alsa_test 运行此时耳机播放的是噪声，随机数。总结得益于官方提供了完整的SDK开发环境，以及板子极影部署了alsa，所以基于alsa进行音频开发变得很简单，这一篇先进行了简单的开发过程体验，后面来实现音频的采集与播放，为后面的音频试试处理算法应用demo做准备。
发表了主题帖：【米尔-STM32MP257开发板试用体验】C应用开发环境搭建

本帖最后由 qinyunti 于 2025-4-3 11:03 编辑准备供电，Type-C USB供电 Boot模式选择EMMC B3 B2 B1 B0 0010 连接串口使用串口终端连接 115200--8-n-1 输入root登录一.应用编译环境我这里使用WSL+Ubuntu 下载的03-Tools.zip下解压Compile Toolchain/myir-image-full-openstlinux-weston-myd-ld25x-x86_64-toolchain-4.2.4-snapshot.sh ./myir-image-full-openstlinux-weston-myd-ld25x-x86_64-toolchain-4.2.4-snapshot.sh 指定路径回车默认输入y 每次使用初始化环境 source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linux 查看 $CC和$XCC qinyunti@qinyunti:~$ echo $CC aarch64-ostl-linux-gcc -mcpu=cortex-a35 -march=armv8-a+crc -mbranch-protection=standard --sysroot=/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux qinyunti@qinyunti:~$ echo $CXX aarch64-ostl-linux-g++ -mcpu=cortex-a35 -march=armv8-a+crc -mbranch-protection=standard --sysroot=/opt/st/myd-ld25x/4.2.4-snapshot/sysroots/cortexa35-ostl-linux qinyunti@qinyunti:~$ 二.HelloWorld mkdir ld25x cd ld25x/ nano helloworld.c 输入 #include <stdio.h> int main(void){ printf("Hello World\r\n"); return 0; } ctrl+o回车保存 ctrl+x退出编译 $CC helloworld.c -o helloworld 导出到win下 cp helloworld /mnt/d Win下使用crt登录终端 rz导入helloworld文件 chmod +x helloworld 运行三.总结以上简单分享下交叉编译环境搭建,与c程序编译执行测试。为后面开发做准备。
2025-04-01
回复了主题帖：【国民技术高性能MCU N32H487开发板】软件fft性能测试

秦天qintian0303 发表于 2025-4-1 11:55 H4的主频是多大？ 240MHz
发表了主题帖：【国民技术高性能MCU N32H487开发板】音频实时处理应用_回声消除与降噪

前言前面我们准备好了环境,移植好了文件系统,方便进行文件的导入导出以及操作。现在就来评估基于N32H487的音频实时处理应用。目前还未搭建好音频的采集与播放通道，所以暂时通过文件系统的wav音频文件作为输入输出，重点验证音频处理算法的执行时间，是否能满足实时处理要求。代码见:https://github.com/qinyunti/N32H487.git Speex移植 Speex的移植可以参考公众号文章 https://mp.weixin.qq.com/s/zJPNgyOaKNpIbHfshe6CjQ https://mp.weixin.qq.com/s/-nRwGWvYfl6wtvFSSul1DQ https://mp.weixin.qq.com/s/p6cOppuoFYCTw6a-bu299Q 代码如下添加头文件包含路径定义宏 HAVE_CONFIG_H os_support_custom.h中实现malloc，free和打印接口 math_approx.h中实现math函数测试这里准备了两个wav文件spk.wav表示回采的远程音频数据，mic.wav是本地采集的mic音频数据(包含了本地声音和远程说话声)。测试代码见 speexecho.c shell_func.c中添加命令行 static void speexfunc(uint8_t* param); { (uint8_t*)"speex", speexfunc, (uint8_t*)"speex mic spk out"}, extern int speex_main(int argc, char **argv); void speexfunc(uint8_t* param) { char* cmd = "speex"; char mic[32]; char spk[32]; char out[32]; char* argv[4]={cmd,mic,spk,out}; if(3 == sscanf((const char*)param, "%*s %s %s %s", mic, spk, out)) { xprintf("speex %s %s %S\r\n",mic, spk, out); speex_main(4, argv); } } 导入mic.wav spk.wav 堆先设置大一点，后面再去确认消耗量执行 speex 0:/mic.wav 0:/spk.wav 0:/out.wav NN=256 TAIL=1024 最大执行时间为15mS左右。生成out.wav如下导出out.wav 查看输出的文件，可以看到降噪效果明显，回声消除效果有不是很好，因为输入文件的质量不是很好，spk没有处于线性范围，需要调整spk和mic的音量范围最好相当，并且要保证同步性。再测量其他配置 config.h中 //#define FIXED_POINT #define FLOATING_POINT 修改使用浮点还是固定点浮点/定点 NN TAIL 时间浮点 256 1024 14~15mS 256 512 12~13mS 128 1024 8~9ms 128 512 7~8mS 定点 256 1024 14~15mS 256 512 12~13mS 128 1024 8~9mS 128 512 7~8mS 对于16k，256个点，时间为16ms，算法时间需要15ms，所以基本满足不了确认堆消耗量参考 os_support_custom.c记录malloc和free的数量，确定最大消耗量执行完后打印消耗堆信息 uint32_t curused; uint32_t maxused; speex_heap_info(&curused, &maxused); xprintf("heap used max:%d cur:%d\r\n",maxused,curused); NN TAIL 最大堆使用 256 1024 73090 256 512 64894 128 1024 45962 128 512 37762 总结 N32H487有RAM192KB，在典型应用256点，滤波时间1024点时消耗73090B.对于SPK，MIC采集同步的，TAIL无需1024点，512点就足够此时RAM只需要，要减小RAM使用还可以一次处理点数NN减少，根据实际减小TAIL。对于8k采样，256点时间为32mS，算法需要的执行时间14~15ms，占50%不到，还有一半以上时间可以处理其他业务，所以可以实现实时处理。以上测试结果看出，得益于较高的性能和资源，在N32H487上也可以实现音频的实时处理。
2025-03-31
发表了主题帖：【国民技术高性能MCU N32H487开发板】软件fft性能测试

前言后面移植音频处理算法需要大量调用fft算法，由于没有硬件fft模块，只能使用软件进行计算。其执行时间影响音频算法是否能实时处理，所以我们先来进行实测，评估fft执行时间。代码见 https://github.com/qinyunti/N32H487.git 移植kissfft Kissfft是常用的fft实现库，后面的音频算法中也会使用，所以基于该库进行测试。添加代码,并设置对应的头文件包含路径需要实现 kiss_fft_port.c中的kiss_fft_port_malloc和 kiss_fft_port_free 这里使用库自带的malloc和free，配置startup_n32h487.s中 Heap_Size EQU 0x00000200大一点为 Heap_Size EQU 0x00004000 kiss_fft_port.c中 #include <stddef.h> #include <stdlib.h> void* kiss_fft_port_malloc(size_t size) { return malloc(size); } void kiss_fft_port_free(void* p) { free(p); } 测试 shell_func.c中添加命令 #include "kissfft_test.h" static void ffttestfunc(uint8_t* param); { (uint8_t*)"ffttest", ffttestfunc, (uint8_t*)"ffttest nfft cnt"}, void ffttestfunc(uint8_t* param) { int cnt; int nfft; if(2 == sscanf((const char*)param, "%*s %d %d", &nfft, &cnt)) { kiss_fft_test_cpx(nfft, cnt); kiss_fft_test_real(nfft, cnt); } } 输入ffttest 256 1000回车打印如下 [in] (1.000000,0.000000),(1.049083,0.000000),(1.098135,0.000000),(1.147129,0.000000),(1.196034,0.000000),(1.244821,0.000000),(1.293461,0.000000),(1.341924,0.000000),(1.390181,0.000000),(1.438203,0.000000),(1.485960,0.000000),(1.533426,0.000000),(1.580569,0.000000),(1.627363,0.000000),(1.673780,0.000000),(1.719790,0.000000),(1.765367,0.000000),(1.810483,0.000000),(1.855110,0.000000),(1.899223,0.000000),(1.942793,0.000000),(1.985796,0.000000),(2.028205,0.000000),(2.069995,0.000000),(2.111140,0.000000),(2.151616,0.000000),(2.191399,0.000000),(2.230463,0.000000),(2.268787,0.000000),(2.306346,0.000000),(2.343118,0.000000),(2.379081,0.000000),(2.414214,0.000000),(2.448494,0.000000),(2.481902,0.000000),(2.514418,0.000000),(2.546021,0.000000),(2.576693,0.000000),(2.606415,0.000000),(2.635170,0.000000),(2.662939,0.000000),(2.689707,0.000000),(2.715457,0.000000),(2.740174,0.000000),(2.763843,0.000000),(2.786448,0.000000),(2.807979,0.000000),(2.828420,0.000000),(2.847759,0.000000),(2.865986,0.000000),(2.883088,0.000000),(2.899056,0.000000),(2.913881,0.000000),(2.927552,0.000000),(2.940063,0.000000),(2.951404,0.000000),(2.961571,0.000000),(2.970555,0.000000),(2.978353,0.000000),(2.984959,0.000000),(2.990369,0.000000),(2.994581,0.000000),(2.997591,0.000000),(2.999398,0.000000),(3.000000,0.000000),(2.999398,0.000000),(2.997591,0.000000),(2.994581,0.000000),(2.990369,0.000000),(2.984959,0.000000),(2.978353,0.000000),(2.970555,0.000000),(2.961571,0.000000),(2.951404,0.000000),(2.940063,0.000000),(2.927552,0.000000),(2.913881,0.000000),(2.899056,0.000000),(2.883088,0.000000),(2.865986,0.000000),(2.847759,0.000000),(2.828419,0.000000),(2.807979,0.000000),(2.786448,0.000000),(2.763842,0.000000),(2.740174,0.000000),(2.715457,0.000000),(2.689707,0.000000),(2.662939,0.000000),(2.635170,0.000000),(2.606415,0.000000),(2.576693,0.000000),(2.546021,0.000000),(2.514418,0.000000),(2.481902,0.000000),(2.448494,0.000000),(2.414214,0.000000),(2.379081,0.000000),(2.343118,0.000000),(2.306346,0.000000),(2.268786,0.000000),(2.230463,0.000000),(2.191398,0.000000),(2.151616,0.000000),(2.111140,0.000000),(2.069995,0.000000),(2.028205,0.000000),(1.985796,0.000000),(1.942793,0.000000),(1.899223,0.000000),(1.855110,0.000000),(1.810483,0.000000),(1.765367,0.000000),(1.719790,0.000000),(1.673780,0.000000),(1.627363,0.000000),(1.580569,0.000000),(1.533425,0.000000),(1.485960,0.000000),(1.438202,0.000000),(1.390181,0.000000),(1.341924,0.000000),(1.293461,0.000000),(1.244821,0.000000),(1.196034,0.000000),(1.147129,0.000000),(1.098135,0.000000),(1.049082,0.000000),(1.000000,0.000000),(0.950917,0.000000),(0.901865,0.000000),(0.852871,0.000000),(0.803965,0.000000),(0.755178,0.000000),(0.706539,0.000000),(0.658076,0.000000),(0.609819,0.000000),(0.561797,0.000000),(0.514040,0.000000),(0.466574,0.000000),(0.419430,0.000000),(0.372636,0.000000),(0.326220,0.000000),(0.280210,0.000000),(0.234633,0.000000),(0.189517,0.000000),(0.144890,0.000000),(0.100777,0.000000),(0.057206,0.000000),(0.014203,0.000000),(-0.028206,0.000000),(-0.069995,0.000000),(-0.111141,0.000000),(-0.151617,0.000000),(-0.191399,0.000000),(-0.230463,0.000000),(-0.268787,0.000000),(-0.306346,0.000000),(-0.343118,0.000000),(-0.379081,0.000000),(-0.414214,0.000000),(-0.448494,0.000000),(-0.481902,0.000000),(-0.514418,0.000000),(-0.546021,0.000000),(-0.576693,0.000000),(-0.606415,0.000000),(-0.635170,0.000000),(-0.662939,0.000000),(-0.689707,0.000000),(-0.715457,0.000000),(-0.740174,0.000000),(-0.763842,0.000000),(-0.786449,0.000000),(-0.807979,0.000000),(-0.828420,0.000000),(-0.847759,0.000000),(-0.865986,0.000000),(-0.883088,0.000000),(-0.899056,0.000000),(-0.913881,0.000000),(-0.927552,0.000000),(-0.940063,0.000000),(-0.951404,0.000000),(-0.961571,0.000000),(-0.970555,0.000000),(-0.978353,0.000000),(-0.984959,0.000000),(-0.990370,0.000000),(-0.994581,0.000000),(-0.997591,0.000000),(-0.999398,0.000000),(-1.000000,0.000000),(-0.999398,0.000000),(-0.997591,0.000000),(-0.994581,0.000000),(-0.990369,0.000000),(-0.984959,0.000000),(-0.978353,0.000000),(-0.970555,0.000000),(-0.961571,0.000000),(-0.951404,0.000000),(-0.940062,0.000000),(-0.927552,0.000000),(-0.913881,0.000000),(-0.899056,0.000000),(-0.883088,0.000000),(-0.865986,0.000000),(-0.847759,0.000000),(-0.828419,0.000000),(-0.807978,0.000000),(-0.786448,0.000000),(-0.763842,0.000000),(-0.740174,0.000000),(-0.715457,0.000000),(-0.689707,0.000000),(-0.662939,0.000000),(-0.635169,0.000000),(-0.606415,0.000000),(-0.576693,0.000000),(-0.546021,0.000000),(-0.514418,0.000000),(-0.481902,0.000000),(-0.448494,0.000000),(-0.414213,0.000000),(-0.379081,0.000000),(-0.343118,0.000000),(-0.306346,0.000000),(-0.268786,0.000000),(-0.230463,0.000000),(-0.191398,0.000000),(-0.151616,0.000000),(-0.111141,0.000000),(-0.069995,0.000000),(-0.028205,0.000000),(0.014204,0.000000),(0.057207,0.000000),(0.100778,0.000000),(0.144890,0.000000),(0.189517,0.000000),(0.234633,0.000000),(0.280210,0.000000),(0.326221,0.000000),(0.372637,0.000000),(0.419431,0.000000),(0.466575,0.000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256点 1000次，用时如下复数fft 复数ifft 424ms 419ms 实数fft 实数ifft 266ms 271ms 所以一次实数fft计算大概在270uS左右。对比某个risc平台soc，跑525MHz，大概在100uS左右，性能是相当的。
发表了主题帖：【国民技术高性能MCU N32H487开发板】文件传输以及文件操作命令集

前言前面实现了文件系统，可以进行文件的读写，继续来实现文件的传输和基本的文件操作命令集，方便后续操作。代码见 https://github.com/qinyunti/N32H487.git 文件操作命令集合 shell_func.c中添加命令 static void lsfilefunc(uint8_t* param); static void rmfilefunc(uint8_t* param); static void renamefilefunc(uint8_t* param); static void touchfunc(uint8_t* param); static void mkdirfunc(uint8_t* param); static void pwdfunc(uint8_t* param); static void cdfunc(uint8_t* param); static void cpfilefunc(uint8_t* param); static void freefunc(uint8_t* param); { (uint8_t*)"ls ", lsfilefunc, (uint8_t*)"ls path"}, { (uint8_t*)"rm ", rmfilefunc, (uint8_t*)"rm path"}, { (uint8_t*)"rename ", renamefilefunc, (uint8_t*)"rename path newpath"}, { (uint8_t*)"touch ", touchfunc, (uint8_t*)"touch path size"}, { (uint8_t*)"mkdir ", mkdirfunc, (uint8_t*)"mkdir path"}, { (uint8_t*)"pwd ", pwdfunc, (uint8_t*)"pwd"}, { (uint8_t*)"cd ", cdfunc, (uint8_t*)"cd path"}, { (uint8_t*)"cp", cpfilefunc, (uint8_t*)"cp srcpath dstpath"}, { (uint8_t*)"free", freefunc, (uint8_t*)"free path"}, 实现如下 /*************** * 文件操作部分 **************/ /* List contents of a directory */ static FRESULT list_dir (const char *path) { FRESULT res; DIR dir; FILINFO fno; int nfile, ndir; res = f_opendir(&dir, path); /* Open the directory */ if (res == FR_OK) { nfile = ndir = 0; for (;;) { res = f_readdir(&dir, &fno); /* Read a directory item */ if (res != FR_OK || fno.fname[0] == 0) break; /* Error or end of dir */ if (fno.fattrib & AM_DIR) { /* Directory */ xprintf(" <DIR> %s\n", fno.fname); ndir++; } else { /* File */ xprintf("%10u %s\n", fno.fsize, fno.fname); nfile++; } } f_closedir(&dir); xprintf("%d dirs, %d files.\n", ndir, nfile); } else { xprintf("Failed to open \"%s\". (%u)\n", path, res); } return res; } void lsfilefunc(uint8_t* param) { char path[128]; if(1 == sscanf((const char*)param, "%*s %s", path)) { list_dir((const char *)path); } else { xprintf("param err"); } } void rmfilefunc(uint8_t* param) { FRESULT res; char path[128]; if(1 == sscanf((const char*)param, "%*s %s", path)) { if(FR_OK != (res = f_unlink((const char *)path))) { xprintf("unlink %s err %d\r\n",path,res); } } else { xprintf("param err"); } } void renamefilefunc(uint8_t* param) { FRESULT res; char path[128]; char newpath[128]; if(2 == sscanf((const char*)param, "%*s %s %s", path, newpath)) { if(FR_OK != (res = f_rename((const char *)path, (const char*)newpath))) { xprintf("rename %s to %s err %d\r\n",path,newpath,res); } } else { xprintf("param err"); } } void touchfunc(uint8_t* param) { FIL fil; char path[128]; int size; if(2 == sscanf((const char*)param, "%*s %s %d", path, &size)) { FRESULT res = f_open(&fil, path, FA_CREATE_NEW | FA_WRITE); if (FR_OK == res) { if(FR_OK != (res = f_expand(&fil,size,1))) { xprintf("expand %s size to %d err %d\r\n",path,size,res); } if(FR_OK != (res = f_close(&fil))) { xprintf("close %s err %d\r\n",path,res); } } else { xprintf("open %s err %d\r\n",path,res); } } else { xprintf("param err"); } } void mkdirfunc(uint8_t* param) { char path[128]; FRESULT res; if(1 == sscanf((const char*)param, "%*s %s", path)) { if(FR_OK != (res=f_mkdir((const char*)path))) { xprintf("mkdir %s err %d",path,res); } } else { xprintf("param err"); } } void pwdfunc(uint8_t* param) { (void)param; FRESULT fr; TCHAR str[128]; if(1 == sscanf((const char*)param, "%*s %s", str)){ if(FR_OK != (fr = f_getcwd(str, 128))) /* Get current directory path */ { xprintf("getcwd err %d\r\n",fr); } else { xprintf("%s\r\n",str); } }else { xprintf("param err"); } } void cdfunc(uint8_t* param) { char path[128]; FRESULT res; if(1 == sscanf((const char*)param, "%*s %s", path)) { if(FR_OK != (res=f_chdir((const char*)path))) { xprintf("chdir to %s err %d",path,res); } } else { xprintf("param err"); } } void freefunc(uint8_t* param) { char path[128]; FRESULT res; if(1 == sscanf((const char*)param, "%*s %s", path)) { FATFS *fs; DWORD fre_clust, fre_sect, tot_sect; /* Get volume information and free clusters of drive 1 */ res = f_getfree(path, &fre_clust, &fs); if(res == FR_OK) { /* Get total sectors and free sectors */ tot_sect = (fs->n_fatent - 2) * fs->csize; fre_sect = fre_clust * fs->csize; /* Print the free space (assuming 512 bytes/sector) */ xprintf("%10lu KiB total drive space.\n%10lu KiB available.\n", tot_sect / 2, fre_sect / 2); } else { xprintf("getfree %s err %d\r\n",path,res); } } else { xprintf("param err"); } } static int cp(const char* src, const char* dst) { FIL fr; FIL fw; BYTE buf[64] = {0x00}; FRESULT res; size_t write_size; /*剩余待写入字节数*/ DWORD pos = 0; UINT btr; /*一次试图写入字节数*/ UINT br; /*一次实际读到字节数*/ UINT bw; /*一次实际写入字节数*/ UINT size; res = f_open(&fr, src, FA_READ); if (res != FR_OK) { return -1; } res = f_open(&fw, dst, FA_WRITE | FA_CREATE_ALWAYS); if (res != FR_OK) { f_close(&fr); return -1; } write_size = f_size( &fr ); size = write_size; do { btr = (write_size > sizeof(buf)) ? sizeof(buf) : write_size; //res = f_lseek(&fr, pos); res = f_read (&fr, buf, btr, &br); if(res != FR_OK) { f_close(&fw); f_close(&fr); return -1; } //res = f_lseek(&fw, pos); res = f_write(&fw, buf, br, &bw); if((res != FR_OK) || (br != bw)) { f_close(&fw); f_close(&fr); return -1; } //f_sync(&fw); pos += br; write_size -= br; xprintf("\b\b%02d", 100 * (pos + 1) / size); }while(write_size > 0); xprintf("\b\b\b%d\r\n", 100); res = f_close(&fw); res = f_close(&fr); return 0; } static void cpfilefunc(uint8_t * cmdbuf) { int len; int res; char path[32] = {0x00}; char dst[32] = {0x00}; char regexp[32]; memset((void *)path, 0, sizeof(path)); len = sscanf((char const *)cmdbuf, "%*s %31s %31s %31s", path,dst,regexp); if (len == 2) { xprintf("\tcopy \"%s\" to \"%s\"...\r\n", path, dst); res = cp(path, dst); xprintf("f_cp result = %d\r\n", res); } else {} } 查看添加的命令测试ls 0: 其他命令都测试OK。 Xmodem移植时间戳获取函数 Main.c中初始化时 RCC_ClocksType RCC_clock; RCC_GetClocksFreqValue(&RCC_clock); SysTick_Config(RCC_clock.SysclkFreq/1000); n32h47x_48x_it.c中 uint32_t g_sys_tick = 0; void SysTick_Handler(void) { g_sys_tick++; } extern uint32_t g_sys_tick; static uint32_t getms(void) { return g_sys_tick; } Xmodem的实现参考公众号文章 https://mp.weixin.qq.com/s/QSYKxND3DTyQZ0JtnSqkzQ Xmodem.c #include <string.h> #include "xmodem.h" /* 符号定义 */ #define SOH 0x01 #define STX 0x02 #define EOT 0x04 #define ACK 0x06 #define NAK 0x15 #define CAN 0x18 #define CTRLZ 0x1A /* 状态 */ #define XMODEM_STATE_IDLE 0 #define XMODEM_STATE_RX_START_WAIT 1 #define XMODEM_STATE_RX_START_WAIT_HEAD 2 #define XMODEM_STATE_RX_DATA_WAIT 3 #define XMODEM_STATE_RX_DATA_WAIT_HEAD 4 #define XMODEM_STATE_TX_START_WAIT 1 #define XMODEM_STATE_TX_DATA 2 #define XMODEM_STATE_TX_ACK_WAIT 3 /** * \struct xmodem_state_st * 状态机结构体 */ typedef struct { uint8_t state; /**< 状态机的状态 */ uint32_t getlen; /**< 接收到的数据个数 */ uint8_t pnum; /**< 包ID */ uint32_t ms; /**< 上一个状态mS时间戳 */ } xmodem_state_st; static xmodem_cfg_st* s_cfg_pst = 0; /* 接口指针,用户初始化 */ static xmodem_state_st s_state_st; /** * crc计算参考https://www.iar.com/knowledge/support/technical-notes/general/checksum-generation/ */ static const uint16_t t[] = { 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, }; static uint16_t crc_nibble_rom(uint16_t sum, uint8_t* p, uint32_t len) { while (len--) { // hi nibble sum = t[(sum>>12)^(*p >> 4)]^(sum<<4); // lo nibble sum = t[(sum>>12)^(*p++ & 0xF)]^(sum<<4); } return sum; } static int xmodem_check(uint16_t crc, uint8_t *buf, uint32_t sz) { if (crc != 0) { uint16_t crc = crc_nibble_rom(0, buf, sz); uint16_t tcrc = ((uint16_t)(buf[sz]) << 8) + (uint16_t)(buf[sz + 1]); if (crc == tcrc) { return 0; } } else { uint8_t cks = 0; for (uint32_t i = 0; i < sz; i++) { cks += buf[i]; } if (cks == buf[sz]) { return 0; } } return -1; } static uint16_t xmodem_check_cal(uint16_t crc, uint8_t *buf, uint32_t sz) { if (crc != 0) { uint16_t check; check = crc_nibble_rom(0, buf, sz); buf[sz+1] = check & 0xFF; buf[sz] = (check>>8) & 0xFF; return check; } else { uint8_t cks = 0; uint32_t i; for (i = 0; i < sz; i++) { cks += buf[i]; } buf[i] = cks; return cks; } } /** * \fn xmodem_rx * 接收处理, 在此之前必须要先调用xmodem_init_rx初始化 * \retval 0 正在处理,需要循环继续调用xmodem_rx处理 * \retval 1 接收正常完成 * \retval -1 参数错误,未初始化对应的接口 * \retval -2 未初始化,处于空闲状态 * \retval -3 发送方提前结束 * \retval -4 启动后超时未收到包头 * \retval -5 传输过程中,等待包头超时 * \retval -6 传输过程中,包ID错误,取消传输 * \retval -7 传输过程中,等待数据超时 * \retval -8 传输过程中,发送方取消 * \retval -9 传输过程中,写数据错误 */ int xmodem_rx(void) { int res = 0; uint8_t tmp = NAK; uint32_t t = s_cfg_pst->getms(); uint8_t* buf; uint16_t len; uint32_t getlen; if(s_cfg_pst == 0) { return -1; } if((s_cfg_pst->io_read == 0) || \ (s_cfg_pst->io_write == 0) || \ (s_cfg_pst->mem_write == 0) || \ (s_cfg_pst->buffer == 0) || \ (s_cfg_pst->getms == 0)) { return -1; } switch(s_state_st.state) { case XMODEM_STATE_IDLE: res = -2; break; case XMODEM_STATE_RX_START_WAIT: /* 根据使用校验方式发送不同的启动字符, * 然后等待对方发送第一个包的包头 */ if(s_cfg_pst->crccheck) { tmp = 'C'; } else { tmp = NAK; } s_cfg_pst->io_write(&tmp,1); s_state_st.ms = t; s_state_st.state = XMODEM_STATE_RX_START_WAIT_HEAD; s_cfg_pst->xferlen = 0; break; case XMODEM_STATE_RX_START_WAIT_HEAD: case XMODEM_STATE_RX_DATA_WAIT_HEAD: buf = s_cfg_pst->buffer; buf[0] = 0; if(0 != s_cfg_pst->io_read(buf,1)) { if((buf[0] == SOH) || (buf[0] == STX)) { s_cfg_pst->plen = (buf[0] == SOH) ? 128 : 1024; s_state_st.ms = t; s_state_st.state = XMODEM_STATE_RX_DATA_WAIT; s_state_st.getlen = 1; } /* 发送方结束 */ if(buf[0] == EOT) { tmp = ACK; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; if(s_cfg_pst->xferlen >= s_cfg_pst->totallen) { res = 1; } else { res = -3; } } /* 发送方取消 */ if(buf[0] == CAN) { s_state_st.state = XMODEM_STATE_IDLE; res = -8; } } if((buf[0] != SOH) && (buf[0] != STX)) { /* 非法值或者没有收到数据,继续等待直到超时 */ if((t - s_state_st.ms) >= s_cfg_pst->ack_timeout) { /* 超时未收到响应,继续重复发送启动字符 * 如果超过了设置的超时时间则退出 */ if(s_cfg_pst->start_timeout <= 1) { /* 超时退出 */ s_state_st.state = XMODEM_STATE_IDLE; res = -4; } else { /* 重新发送启动 */ if(s_state_st.state == XMODEM_STATE_RX_START_WAIT_HEAD) { s_cfg_pst->start_timeout--; s_state_st.state = XMODEM_STATE_RX_START_WAIT; } else { /* 数据阶段等待头超时, 结束传输 */ s_state_st.state = XMODEM_STATE_IDLE; res = -5; } } } else { /* 未超时继续等待*/ } } break; case XMODEM_STATE_RX_DATA_WAIT: buf = s_cfg_pst->buffer; len = s_cfg_pst->plen + 3 + ((s_cfg_pst->crccheck == 0) ? 1 : 2); getlen = s_cfg_pst->io_read(buf+s_state_st.getlen, len - s_state_st.getlen); s_state_st.getlen += getlen; if(s_state_st.getlen >= len) { /* 接收完,准备判断合法性 */ if(((uint8_t)(s_state_st.pnum + 1) != buf[1]) || ((buf[1] + buf[2]) != (uint8_t)255)) { /* 包ID错误,取消传输 */ tmp = CAN; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; res = -6; } else { /* 校验正确 */ if(0 == xmodem_check(s_cfg_pst->crccheck, buf+3, s_cfg_pst->plen)) { s_state_st.pnum = buf[1]; s_state_st.state = XMODEM_STATE_RX_DATA_WAIT_HEAD; s_state_st.ms = t; /* 调用写接口存储数据 */ if((s_cfg_pst->xferlen + s_cfg_pst->plen) >= s_cfg_pst->totallen) { if(s_cfg_pst->xferlen >= s_cfg_pst->totallen) { /* 已经收到了指定的数据量,但是发送方还在发送,则主动取消 */ tmp = CAN; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; res = 1; } else { tmp = ACK; s_cfg_pst->io_write(&tmp,1); s_cfg_pst->mem_write(s_cfg_pst->addr+s_cfg_pst->xferlen, buf+3 ,s_cfg_pst->totallen-s_cfg_pst->xferlen); s_cfg_pst->xferlen = s_cfg_pst->totallen; } } else { tmp = ACK; s_cfg_pst->io_write(&tmp,1); if(0 == s_cfg_pst->mem_write(s_cfg_pst->addr+s_cfg_pst->xferlen, buf+3 ,s_cfg_pst->plen)) { /* 写错误,取消传输 */ tmp = CAN; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; res = -9; } else { s_cfg_pst->xferlen += s_cfg_pst->plen; } } } else { tmp = NAK; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_RX_DATA_WAIT_HEAD; } } } else { /* 未接收完判断超时 */ if((t - s_state_st.ms) >= s_cfg_pst->packet_timeout) { /* 超时退出 */ tmp = NAK; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; res = -7; } else { /* 未超时继续等待*/ } } break; } return res; } /** * \fn xmodem_init_rx * 接收初始化 * 以下成员必须初始化 * \param[in] cfg \ref xmodem_cfg_st 配置信息 */ void xmodem_init_rx(xmodem_cfg_st* cfg) { s_cfg_pst = cfg; s_state_st.state = XMODEM_STATE_RX_START_WAIT; s_state_st.getlen = 0; s_state_st.pnum = 0; if(s_cfg_pst != 0) { if(s_cfg_pst->io_read_flush != 0) { s_cfg_pst->io_read_flush(); } } } /** * \fn xmodem_tx * 发送处理, 在此之前必须要先调用xmodem_init_tx初始化 * \retval 0 正在处理,需要循环继续调用xmodem_tx处理 * \retval 1 发送正常完成 * \retval -1 参数错误,未初始化对应的接口 * \retval -2 未初始化,处于空闲状态 * \retval -3 接收方提前取消 * \retval -4 启动阶段超时未收到响应 * \retval -5 数据阶段超时未收到响应 */ int xmodem_tx(void) { int res = 0; uint8_t tmp = 0; uint32_t t = s_cfg_pst->getms(); uint8_t* buf; uint16_t len; if(s_cfg_pst == 0) { return -1; } if((s_cfg_pst->io_read == 0) || \ (s_cfg_pst->io_write == 0) || \ (s_cfg_pst->mem_read == 0) || \ (s_cfg_pst->buffer == 0) || \ (s_cfg_pst->getms == 0)) { return -1; } switch(s_state_st.state) { case XMODEM_STATE_IDLE: res = -2; break; case XMODEM_STATE_TX_START_WAIT: buf = s_cfg_pst->buffer; if(0 != s_cfg_pst->io_read(buf,1)) { if((buf[0] == 'C') || (buf[0] == NAK)) { s_cfg_pst->crccheck = (buf[0] == 'C') ? 1 : 0; s_state_st.ms = t; s_state_st.state = XMODEM_STATE_TX_DATA; } if(buf[0] == CAN) { s_state_st.state = XMODEM_STATE_IDLE; res = -3; } } if((buf[0] != 'C') && (buf[0] != NAK) && (buf[0] != CAN)) { /* 非法值或者没有收到数据,继续等待直到超时 */ if((t - s_state_st.ms) >= s_cfg_pst->ack_timeout) { /* 超时未收到响应,继续重复发送启动字符 * 如果超过了设置的超时时间则退出 */ if(s_cfg_pst->start_timeout <= 1) { /* 超时退出 */ s_state_st.state = XMODEM_STATE_IDLE; res = -4; } else { s_cfg_pst->start_timeout--; } s_state_st.ms = t; } else { /* 未超时继续等待*/ } } break; case XMODEM_STATE_TX_DATA: buf = s_cfg_pst->buffer; buf[0] = (s_cfg_pst->plen == 1024)? STX : SOH; buf[1] = s_state_st.pnum; buf[2] = ~buf[1]; if((s_cfg_pst->xferlen + s_cfg_pst->plen) >= s_cfg_pst->totallen) { len = s_cfg_pst->mem_read(s_cfg_pst->addr+s_cfg_pst->xferlen, buf+3,s_cfg_pst->totallen-s_cfg_pst->xferlen); } else { len = s_cfg_pst->mem_read(s_cfg_pst->addr+s_cfg_pst->xferlen, buf+3,s_cfg_pst->plen); } if((len < s_cfg_pst->plen) && (len > 0)) { memset(buf+3+len, CTRLZ, s_cfg_pst->plen - len); } if(len > 0) { xmodem_check_cal(s_cfg_pst->crccheck, buf+3, s_cfg_pst->plen); len = s_cfg_pst->plen + 3 + ((s_cfg_pst->crccheck == 0) ? 1 : 2); s_cfg_pst->io_write(buf,len); s_state_st.state = XMODEM_STATE_TX_ACK_WAIT; s_state_st.ms = t; } else { /* 读完 */ tmp = EOT; s_cfg_pst->io_write(&tmp,1); s_state_st.state = XMODEM_STATE_IDLE; res = 1; } break; case XMODEM_STATE_TX_ACK_WAIT: buf = s_cfg_pst->buffer; if(0 != s_cfg_pst->io_read(buf,1)) { if(buf[0] == ACK) { /* 判断是否传输完,未传输完则发送下一包 */ if((s_cfg_pst->xferlen + s_cfg_pst->plen) >= s_cfg_pst->totallen) { /* 发送完 */ s_state_st.state = XMODEM_STATE_IDLE; s_state_st.pnum++; s_cfg_pst->xferlen += s_cfg_pst->plen; if(s_cfg_pst->xferlen >= s_cfg_pst->totallen) { s_cfg_pst->xferlen = s_cfg_pst->totallen; } tmp = EOT; s_cfg_pst->io_write(&tmp,1); res = 1; } else { /* 发送下一包 */ s_state_st.state = XMODEM_STATE_TX_DATA; s_state_st.pnum++; s_cfg_pst->xferlen += s_cfg_pst->plen; } } if(buf[0] == NAK) { /* 重发 */ s_state_st.state = XMODEM_STATE_TX_DATA; } if(buf[0] == CAN) { s_state_st.state = XMODEM_STATE_IDLE; res = -3; } } if((buf[0] != ACK) && (buf[0] != NAK) && (buf[0] != CAN)) { /* 非法值或者没有收到数据,继续等待直到超时 */ if((t - s_state_st.ms) >= s_cfg_pst->ack_timeout) { /* 超时退出 */ s_state_st.state = XMODEM_STATE_IDLE; res = -5; } else { /* 未超时继续等待*/ } } break; } return res; } /** * \fn xmodem_init_tx * 发送初始化 * 以下成员必须初始化 * \param[in] cfg \ref xmodem_cfg_st 配置信息 */ void xmodem_init_tx(xmodem_cfg_st* cfg) { s_cfg_pst = cfg; s_state_st.state = XMODEM_STATE_TX_START_WAIT; /* 等待接收端发送启动 */ s_state_st.getlen = 0; s_state_st.pnum = 1; if(s_cfg_pst != 0) { s_state_st.ms = s_cfg_pst->getms(); s_cfg_pst->xferlen = 0; if(s_cfg_pst->io_read_flush != 0) { s_cfg_pst->io_read_flush(); } } } Xmodem.h #ifndef XMODEM_H #define XMODEM_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> typedef uint32_t (*xmodem_io_read_pf)(uint8_t* buffer, uint32_t len); /**< 通讯接收接口 */ typedef uint32_t (*xmodem_io_write_pf)(uint8_t* buffer, uint32_t len);/**< 通讯发送接口 */ typedef void (*xmodem_read_flush_pf)(void); /**< 通讯接收flush接口 */ typedef void (*xmodem_write_flush_pf)(void); /**< 通讯发送flush接口 */ typedef uint32_t (*xmodem_mem_read_pf)(uint32_t addr, uint8_t* buffer, uint32_t len); /**< 读存储接口 */ typedef uint32_t (*xmodem_mem_write_pf)(uint32_t addr, uint8_t* buffer, uint32_t len); /**< 写存储接口 */ typedef uint32_t (*xmodem_getms_pf)(void); /**< 获取mS时间戳 */ /** * \struct xmodem_cfg_st * 接口,参数配置结构体 */ typedef struct { xmodem_io_read_pf io_read; /**< 通讯接收接口 */ xmodem_io_read_pf io_write; /**< 通讯发送接口 */ xmodem_read_flush_pf io_read_flush; /**< 通讯接收flush接口 */ xmodem_write_flush_pf io_write_flush; /**< 通讯发送flush接口 */ xmodem_mem_read_pf mem_read; /**< 读存储接口 */ xmodem_mem_write_pf mem_write; /**< 写存储接口 */ xmodem_getms_pf getms; /**< 获取mS时间戳接口 */ uint32_t start_timeout; /**< 等待启动超时次数,单位每次超时为ack_timeout */ uint32_t packet_timeout; /**< 等待数据包超时时间mS */ uint32_t ack_timeout; /**< 等待响应(头)超时时间mS*/ uint8_t crccheck; /**< 对于接收时有效1使用CRC校验 0使用累加和校验 */ uint16_t plen; /**< 对于发送时有效指定包长时128还是1024 */ uint8_t* buffer; /**< 包缓冲区,用户提供,1024字节包需要1024+5 */ uint32_t addr; /**< 存储地址 */ uint32_t totallen; /**< 传输长度 */ uint32_t xferlen; /**< 已经传输长度 */ } xmodem_cfg_st; /** * \fn xmodem_rx * 接收处理, 在此之前必须要先调用xmodem_init_rx初始化 * \retval 0 正在处理,需要循环继续调用xmodem_rx处理 * \retval 1 接收正常完成 * \retval -1 参数错误,未初始化对应的接口 * \retval -2 未初始化,处于空闲状态 * \retval -3 发送方提前结束 * \retval -4 启动后超时未收到包头 * \retval -5 传输过程中,等待包头超时 * \retval -6 传输过程中,包ID错误,取消传输 * \retval -7 传输过程中,等待数据超时 * \retval -8 传输过程中,发送方取消 * \retval -9 传输过程中,写数据错误 */ int xmodem_rx(void); /** * \fn xmodem_init_rx * 接收初始化 * 以下成员必须初始化 * \param[in] cfg \ref xmodem_cfg_st 配置信息 */ void xmodem_init_rx(xmodem_cfg_st* cfg); /** * \fn xmodem_tx * 发送处理, 在此之前必须要先调用xmodem_init_tx初始化 * \retval 0 正在处理,需要循环继续调用xmodem_tx处理 * \retval 1 发送正常完成 * \retval -1 参数错误,未初始化对应的接口 * \retval -2 未初始化,处于空闲状态 * \retval -3 接收方提前取消 * \retval -4 启动阶段超时未收到响应 * \retval -5 数据阶段超时未收到响应 */ int xmodem_tx(void); /** * \fn xmodem_init_tx * 发送初始化 * 以下成员必须初始化 * \param[in] cfg \ref xmodem_cfg_st 配置信息 */ void xmodem_init_tx(xmodem_cfg_st* cfg); #ifdef __cplusplus } #endif #endif Shell_func.h中 #include "xmodem.h" static void rxfilefunc(uint8_t* param); static void sxfilefunc(uint8_t* param); { (uint8_t*)"rxfile", rxfilefunc, (uint8_t*)"rxfile name len"}, { (uint8_t*)"sxfile", sxfilefunc, (uint8_t*)"sxfile name len"}, /*************** * 文件传输部分 **************/ static uint8_t rxtx_buf[1029]; extern uint32_t g_sys_tick; static uint32_t getms(void) { return g_sys_tick; } static uint32_t io_read(uint8_t* buffer, uint32_t len) { return uart_read(0,buffer, len); } static void io_read_flush(void) { uint8_t tmp; while(0 != uart_read(0,&tmp, 1)); } static uint32_t io_write(uint8_t* buffer, uint32_t len) { uart_send(0,buffer, len); return len; } static FIL rx_fil; /* File object */ static int rx_file_open_flag = 0; static int rx_file_open(char* name) { FRESULT res = f_open(&rx_fil, name, FA_CREATE_NEW | FA_WRITE); if (FR_OK == res) { rx_file_open_flag = 1; return 0; } else { xprintf("open %s err %d\r\n",name,res); return -1; } } static int rx_file_close(char* name) { (void)name; if(rx_file_open_flag != 0) { rx_file_open_flag = 0; FRESULT res = f_close(&rx_fil); if(res != FR_OK) { xprintf("close err %d\r\n",res); } return 0; } else { return -1; } } static uint32_t rx_file_write(uint32_t addr, uint8_t* buffer, uint32_t len) { (void)addr; if(rx_file_open_flag != 0) { UINT bw; FRESULT res = f_write(&rx_fil, buffer, len, &bw); if ((bw != len) || (res != FR_OK)) { xprintf("write err %d %d\r\n",bw,res); } return bw; } else { return 0; } } void rxfilefunc(uint8_t* param) { char name[64]; uint32_t len; int res = 0; if(2 == sscanf((const char*)param, "%*s %s %d", name, &len)) { xprintf("rxfile %s %ld\r\n",name,len); if(0 == rx_file_open(name)) { xmodem_cfg_st cfg= { .buffer = rxtx_buf, .crccheck = 1, .getms = getms, .io_read = io_read, .io_read_flush = io_read_flush, .io_write = io_write, .start_timeout = 60, .packet_timeout = 2000, .ack_timeout = 2000, .mem_write = rx_file_write, .addr = 0, .totallen = len, }; xmodem_init_rx(&cfg); while((res = xmodem_rx()) == 0); rx_file_close(name); xprintf("res:%d\r\n",res); } else { xprintf("open:%s err\r\n",name); } } } static FIL tx_fil; /* File object */ static int tx_file_open_flag = 0; static int tx_file_open(char* name) { FRESULT res = f_open(&tx_fil, name, FA_READ); if (FR_OK == res) { tx_file_open_flag = 1; return 0; } else { xprintf("open %s err %d\r\n",name,res); return -1; } } static int tx_file_close(char* name) { (void)name; if(tx_file_open_flag != 0) { tx_file_open_flag = 0; FRESULT res = f_close(&tx_fil); if(res != FR_OK) { xprintf("close err %d\r\n",res); } return 0; } else { return -1; } } static uint32_t tx_file_read(uint32_t addr, uint8_t* buffer, uint32_t len) { (void)addr; UINT br; FRESULT res = f_read(&tx_fil, buffer, len, &br); if(res != 0) { xprintf("read err %d\r\n",res); } return br; } void sxfilefunc(uint8_t* param) { char name[64]; uint32_t len; int res = 0; if(2 == sscanf((const char*)param, "%*s %s %d", name, &len)) { xprintf("sxfile %s %ld\r\n",name,len); if(0 == tx_file_open(name)) { xmodem_cfg_st cfg= { .buffer = rxtx_buf, .plen = 1024, .getms = getms, .io_read = io_read, .io_read_flush = io_read_flush, .io_write = io_write, .start_timeout = 60, .packet_timeout = 1000, .ack_timeout = 5000, .mem_read = tx_file_read, .addr = 0, .totallen = len, }; xmodem_init_tx(&cfg); while((res = xmodem_tx()) == 0); tx_file_close(name); xprintf("res:%d\r\n",res); } else { xprintf("open:%s err\r\n",name); } } } 看到添加的命令导入文件测试，这里因为spi速度设置的比较低所以文件写比较慢，慢于xmodem传输速度。导出文件测试这里读文件比写文件块，速度大于xmodem传输速度，所以115200波特率，9KB/s基本跑满。总结以上完成了文件传输，和基本文件操作命令，后面就可以方便导入导出文件，以及进行文件操作。
发表了主题帖：【国民技术高性能MCU N32H487开发板】移植FATFS文件系统读写文件测试

前言前面实现了SPI FLASH的读写，这一篇来基于SPI FLASH来移植FATFS文件系统。代码见: https://github.com/qinyunti/N32H487.git 源码添加源文件设置头文件包含路径配置没有使用OS ffconf.h中 #define FF_FS_REENTRANT0 不支持动态内存分配 Ffconf.h中 #define FF_USE_LFN2 此时无需ffsystem.c diskio.c中,调用flash_itf.c的接口实现读写。手里的是W25Q32FW 4MB diskio.c中根据实际大小修改 case GET_SECTOR_COUNT: *(DWORD*)buff = 8192; /* 8192*512=4MB */ res = RES_OK; 测试初始化挂载文件系统 #include ff.h static FATFS fs; /* Filesystem object */ static BYTE work[FF_MAX_SS]; /* Work area (larger is better for processing time) */ static void fs_init(void) { FRESULT res; /* API result code */ if(FR_OK != (res = f_mount (&fs, "0:", 1))) { xprintf("mount err %d, mkfs\r\n",res); res = f_mkfs("0:",0,work,sizeof(work)); if(res == 0) { xprintf("mkfs ok\r\n"); if(FR_OK == f_mount (&fs, "0:", 1)) { xprintf("mount ok\r\n"); } else { xprintf("mount err\r\n"); } } else { xprintf("mkfs err %d\r\n",res); } } else { xprintf("mount ok\r\n"); } } shell_func.c中添加两个命令行 #include "ff.h" static void printfilefunc(uint8_t* param); static void writefilefunc(uint8_t* param); { (uint8_t*)"printfile", printfilefunc, (uint8_t*)"printfile path addr size"}, { (uint8_t*)"writefile", writefilefunc, (uint8_t*)"writefile path addr[hex] hexstr"}, void printfilefunc(uint8_t* param) { char path[128]; uint8_t tmp[16]; uint32_t addr; uint32_t size; FRESULT res; FIL fil; UINT br; uint32_t offset = 0; if(3 == sscanf((const char*)param, "%*s %s %x %d", path, &addr, &size)) { xprintf("hexdump %s 0x%x %d\r\n",path,addr,size); if(FR_OK == (res=f_open(&fil,(const char*)path, FA_READ))) { xprintf("\r\n"); do { br = 0; if(FR_OK == (res = f_read(&fil,tmp,(size>16)?16:size,&br))) { xprintf("%08x ",offset); offset+=br; for(uint32_t i=0;i<br;i++) { xprintf("%02x",(uint32_t)tmp); } xprintf(":"); for(uint32_t i=0;i<br;i++) { xprintf("%c",((tmp>0x1F)&&(tmp<0x7F))?(char)tmp:'.'); } xprintf("\r\n"); size -= br; } else { break; } }while(br > 0); if(FR_OK != (res = f_close(&fil))) { xprintf("close %s err %d\r\n",path,res); } } else { xprintf("open %s err %d",path,res); } } else { xprintf("param err"); } } void writefilefunc(uint8_t* param) { char path[128]; uint8_t hexstr[32+1]; uint8_t tmp[16]; uint32_t hexnum = 0; uint32_t addr; FRESULT res; FIL fil; UINT bw; if(3 == sscanf((const char*)param, "%*s %s %x %s", path, &addr, hexstr)) { xprintf("hexwrite %s 0x%x %s\r\n",path,addr,hexstr); if(FR_OK == (res=f_open(&fil,(const char*)path, FA_WRITE | FA_CREATE_ALWAYS))) { xprintf("\r\n"); hexnum = str2hex((const char*)hexstr,tmp,32); if(hexnum > 0) { if(FR_OK == (res=(f_lseek(&fil,addr)))) { if(FR_OK != (res = f_write(&fil,tmp,hexnum,&bw))) { xprintf("write err %d\r\n",res); } } else { xprintf("seek %d err %d\r\n",addr,res); } } if(FR_OK != (res = f_close(&fil))) { xprintf("close %s err %d\r\n",path,res); } } else { xprintf("open %s err %d",path,res); } } else { xprintf("param err"); } } 第一次运行，flash中没有文件系统，会执行格格式化，需要时间会久点。 Help查看增加的命令些文件再读出 writefile 0:/test.txt 0 12345678 printfile 0:/test.txt 0 16 可以看到写入和读出的数据一致。问题杜邦线较长可能影响信号质量，可以适当降低spi速率等待发送完改为 while(SPI_I2S_GetStatus(SPI1, SPI_I2S_BUSY_FLAG) != 0); 而不是SPI_I2S_TE_FLAG CS初始化要拉高 GPIO_WriteBits(GPIOA, GPIO_PIN_4, Bit_SET); FLASH大小至少要设置为4M *(DWORD*)buff = 8192; 如果设置为2M *(DWORD*)buff = 4096; 会 Nclst为0 nclst = (tsect - sysect) / fs->csize;/* Number of clusters */ if (nclst == 0) return FR_NO_FILESYSTEM;/* (Invalid volume size) */
发表了主题帖：【国民技术高性能MCU N32H487开发板】spi测试与spi flash驱动

前言这一篇，继续来测试SPI接口，实现SPI FLASH驱动，为后面文件系统做准备。 SPI驱动添加spi的库引脚这里使用SPI1 PA4/5/6/7 AF1 使用杜邦线外接SPI FLASH模块 Spi.c 初始化 #include "uart.h" #include "fifo.h" #include "n32h47x_48x.h" #include "n32h47x_48x_spi.h" #include "n32h47x_48x_rcc.h" #include "n32h47x_48x_gpio.h" void spi_init(int id, uint32_t baud, int mode) { if(id == 0){ /* PA4 NSS GPIO * PB5 SCK AF1 * PB6 MISO AF1 * PB7 MOSI AF1 */ RCC_EnableAHB1PeriphClk(RCC_AHB_PERIPHEN_GPIOA,ENABLE); RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_SPI1,ENABLE); GPIO_InitType GPIO_InitStructure; /* Initialize GPIO_InitStructure */ GPIO_InitStruct(&GPIO_InitStructure); GPIO_InitStructure.Pin = GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF1; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.Pin = GPIO_PIN_4; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); SPI_InitType SPI_InitStruct; RCC_ClocksType RCC_clock; RCC_GetClocksFreqValue(&RCC_clock); uint32_t clk = RCC_clock.Pclk2Freq; uint32_t div = clk/baud; if(div<=2){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_2; }else if(div<=4){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_4; }else if(div<=8){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_8; }else if(div<=16){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_16; }else if(div<=32){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_32; }else if(div<=64){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_64; }else if(div<=128){ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_128; }else{ SPI_InitStruct.BaudRatePres = SPI_BR_PRESCALER_256; } if(mode & 0x01){ SPI_InitStruct.CLKPHA = SPI_CLKPHA_SECOND_EDGE; }else{ SPI_InitStruct.CLKPHA = SPI_CLKPHA_FIRST_EDGE; } if(mode & 0x02){ SPI_InitStruct.CLKPOL = SPI_CLKPOL_HIGH; }else{ SPI_InitStruct.CLKPOL = SPI_CLKPOL_LOW; } SPI_InitStruct.CRCPoly = 0x0f; SPI_InitStruct.DataDirection = SPI_DIR_DOUBLELINE_FULLDUPLEX; SPI_InitStruct.DataLen = SPI_DATA_SIZE_8BITS; SPI_InitStruct.FirstBit = SPI_FB_MSB; SPI_InitStruct.NSS = SPI_NSS_SOFT; SPI_InitStruct.SpiMode = SPI_MODE_MASTER; SPI_Init(SPI1,&SPI_InitStruct); SPI_Enable(SPI1,ENABLE); }else if(id == 1){ } } 传输接口 uint32_t spi_trans(int id, int cs, uint8_t* tx_buffer, uint8_t* rx_buffer, uint32_t len, int flag) { uint8_t rx; if(id == 0){ if(cs == 0){ GPIO_WriteBits(GPIOA, GPIO_PIN_4, Bit_RESET); }else if(cs == 1){ } for(uint32_t i=0; i<len; i++){ while(SPI_I2S_GetStatus(SPI1, SPI_I2S_TE_FLAG) == 0); if(tx_buffer != (uint8_t*)0){ SPI_I2S_TransmitData(SPI1, tx_buffer); }else{ SPI_I2S_TransmitData(SPI1, 0xFF); } while(SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == 0); rx = SPI_I2S_ReceiveData(SPI1); if(rx_buffer != (uint8_t*)0){ rx_buffer = rx; } } if(flag){ if(cs == 0){ GPIO_WriteBits(GPIOA, GPIO_PIN_4, Bit_SET); }else if(cs == 1){ } } }else if(id == 1){ } return len; } Spi.h #ifndef SPI_H #define SPI_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> void spi_init(int id, uint32_t baud, int mode); uint32_t spi_trans(int id, int cs, uint8_t* tx_buffer, uint8_t* rx_buffer, uint32_t len, int flag); #ifdef __cplusplus } #endif #endif SPI FLASH驱动添加flash.c/h完全可移植 flash.c #include <string.h> #include "flash.h" #define FLASH_CMD_WEL 0x06 #define FLASH_CMD_PAGEPROGRAM 0x02 #define FLASH_CMD_READ 0x03 #define FLASH_CMD_ERASESECTOR 0x20 #define FLASH_CMD_READSR1 0x05 #define FLASH_CMD_READSR2 0x35 #define FLASH_CMD_READSR3 0x15 #define FLASH_CMD_WRITESR1 0x01 #define FLASH_CMD_WRITESR2 0x31 #define FLASH_CMD_WRITESR3 0x11 #define FLASH_SR1_BUSY (1 << 0) int flash_write_enable(flash_dev_st* dev) { uint8_t cmd = FLASH_CMD_WEL; dev->spi_trans(&cmd, 0, 1, 1); return 0; } int flash_read_sr1(flash_dev_st* dev, uint8_t* sr) { uint8_t cmd[2] = {FLASH_CMD_READSR1,0xFF}; uint8_t rx[2]; dev->spi_trans(cmd, rx, 2, 1); *sr = rx[1]; return 0; } int flash_read_sr2(flash_dev_st* dev, uint8_t* sr) { uint8_t cmd[2] = {FLASH_CMD_READSR2,0xFF}; uint8_t rx[2]; dev->spi_trans(cmd, rx, 2, 1); *sr = rx[1]; return 0; } int flash_read_sr3(flash_dev_st* dev, uint8_t* sr) { uint8_t cmd[2] = {FLASH_CMD_READSR3,0xFF}; uint8_t rx[2]; dev->spi_trans(cmd, rx, 2, 1); *sr = rx[1]; return 0; } int flash_write_sr1(flash_dev_st* dev, uint8_t val) { uint8_t cmd[2] = {FLASH_CMD_WRITESR1,0}; cmd[1] = val; dev->spi_trans(cmd, 0, 2, 1); return 0; } int flash_write_sr2(flash_dev_st* dev, uint8_t val) { uint8_t cmd[2] = {FLASH_CMD_WRITESR2,0}; cmd[1] = val; dev->spi_trans(cmd, 0, 2, 1); return 0; } int flash_write_sr3(flash_dev_st* dev, uint8_t val) { uint8_t cmd[2] = {FLASH_CMD_WRITESR3,0}; cmd[1] = val; dev->spi_trans(cmd, 0, 2, 1); return 0; } int flash_wait_busy(flash_dev_st* dev) { uint8_t sr = 0; do{ flash_read_sr1(dev, &sr); } while(FLASH_SR1_BUSY & sr); return 0; } int flash_erase_sector(flash_dev_st* dev, uint32_t addr) { uint8_t cmd[4]; flash_write_enable(dev); cmd[0] = FLASH_CMD_ERASESECTOR; cmd[1] = (uint8_t)(addr >> 16 & 0xFF); cmd[2] = (uint8_t)(addr >> 8 & 0xFF); cmd[3] = (uint8_t)(addr >> 0 & 0xFF); dev->spi_trans(cmd, 0, 4, 1); flash_wait_busy(dev); return 0; } int flash_pageprogram(flash_dev_st* dev, uint8_t* buffer, uint32_t addr, uint32_t len) { uint8_t cmd[4]; cmd[0] = FLASH_CMD_PAGEPROGRAM; cmd[1] = (uint8_t)(addr >> 16 & 0xFF); cmd[2] = (uint8_t)(addr >> 8 & 0xFF); cmd[3] = (uint8_t)(addr >> 0 & 0xFF); flash_write_enable(dev); dev->spi_trans(cmd, 0, 4, 0); dev->spi_trans(buffer, 0, len, 1); flash_wait_busy(dev); return 0; } uint32_t flash_read(flash_dev_st* dev, uint8_t* buffer, uint32_t addr, uint32_t len) { uint8_t cmd[4]; cmd[0] = FLASH_CMD_READ; cmd[1] = (uint8_t)(addr >> 16 & 0xFF); cmd[2] = (uint8_t)(addr >> 8 & 0xFF); cmd[3] = (uint8_t)(addr >> 0 & 0xFF); dev->spi_trans(cmd, 0, 4, 0); dev->spi_trans(0, buffer, len, 1); return 0; } uint32_t flash_write(flash_dev_st* dev, uint8_t* buffer, uint32_t addr, uint32_t len) { /** * | | | | | * | | * < len > * addr * <sec_head > < sec_tail > * start_addr */ uint32_t sec_head; uint32_t sec_tail = 0; uint32_t sec_mid_num; uint32_t start_addr; uint32_t end_addr; uint32_t fill; start_addr = addr & (~(dev->sector_size-1)); end_addr = (addr+len) & (~(dev->sector_size-1)); sec_head = addr & (dev->sector_size-1); if((end_addr != start_addr) || (sec_head == 0)){ sec_tail = (addr + len) & (dev->sector_size-1); } sec_mid_num = (end_addr - start_addr) >> dev->sector_bits; if((sec_head != 0) || (sec_tail != 0)){ if(sec_mid_num > 1){ sec_mid_num--; }else{ sec_mid_num = 0; } } /* head */ if(sec_head > 0) { flash_read(dev,dev->buffer, start_addr, dev->sector_size); fill =( len > (dev->sector_size-sec_head)) ? (dev->sector_size-sec_head) : len; memcpy(dev->buffer+sec_head,buffer,len); flash_erase_sector(dev,start_addr); for (uint32_t j=0; j<16; j++) { flash_pageprogram(dev,dev->buffer + (j<<dev->page_bits),start_addr + (j<<dev->page_bits), dev->page_size); } buffer += fill; start_addr += dev->sector_size; } /* mid */ for(uint32_t i=0; i<sec_mid_num; i++) { flash_erase_sector(dev,start_addr); for (uint32_t j=0; j<16; j++) { flash_pageprogram(dev, buffer + (j<<dev->page_bits), start_addr + (j<<dev->page_bits), dev->page_size); } buffer += dev->sector_size; start_addr += dev->sector_size; } /* tail */ if(sec_tail > 0) { flash_read(dev,dev->buffer+sec_tail, start_addr+sec_tail, dev->sector_size - sec_tail); memcpy(dev->buffer,buffer,sec_tail); flash_erase_sector(dev,start_addr); for (uint32_t j=0; j<16; j++) { flash_pageprogram(dev, dev->buffer + (j<<dev->page_bits),start_addr + (j<<dev->page_bits), dev->page_size); } } return len; } flash.h #ifndef FLASH_H #define FLASH_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> typedef uint32_t (*flash_spi_io)(uint8_t* tx_buffer, uint8_t* rx_buffer, uint32_t len, int flag); /** * \struct flash_dev_st * FLASH结构. */ typedef struct { flash_spi_io spi_trans; /**< spi传输接口 */ void* buffer; /**< sector缓存 */ uint32_t sector_size; /**< sector大小 */ uint32_t sector_bits; /**< sector大小位数 */ uint32_t page_size; /**< page大小 */ uint32_t page_bits; /**< page大小位数 */ } flash_dev_st; /** * \fn flash_read * 读数据 * \param[in] dev \ref flash_dev_st * \param[in] addr 读开始地址 * \param[out] buffer 存储读出的数据 * \param[in] len 待读出的长度 * \retval 返回实际读出的数据长度 */ uint32_t flash_read(flash_dev_st* dev, uint8_t* buffer, uint32_t addr, uint32_t len); /** * \fn flash_write * 写数据 * \param[in] dev \ref flash_dev_st * \param[in] addr 写开始地址 * \param[out] buffer 存储待写的数据 * \param[in] len 待写入的长度 * \retval 返回实际写入的数据长度 */ uint32_t flash_write(flash_dev_st* dev, uint8_t* buffer, uint32_t addr, uint32_t len); #ifdef __cplusplus } #endif #endif Flash_itf.c/h实现接口 flash_itf.c #include "flash_itf.h" #include "flash.h" #include "spi.h" static flash_dev_st s_flash; static uint8_t s_spiflash_buffer[4096]; static uint32_t spi_io(uint8_t* tx_buffer, uint8_t* rx_buffer, uint32_t len, int flag) { return spi_trans(0, 0, tx_buffer, rx_buffer, len, flag); } int flash_itf_init(void) { s_flash.spi_trans = spi_io; s_flash.page_bits = 8; s_flash.page_size = 256; s_flash.sector_bits = 12; s_flash.sector_size = 4096; s_flash.buffer = s_spiflash_buffer; return 0; } int flash_itf_deinit(void) { return 0; } uint32_t flash_itf_read(uint8_t* buffer, uint32_t addr, uint32_t len) { return flash_read(&s_flash, buffer, addr, len); } uint32_t flash_itf_write(uint8_t* buffer, uint32_t addr, uint32_t len) { return flash_write(&s_flash, buffer, addr, len); } flash_itf.h #ifndef FLASH_ITF_H #define FLASH_ITF_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> /** * \fn flash_itf_init * 初始化 */ int flash_itf_init(void); /** * \fn flash_itf_deinit * 反初始化 */ int flash_itf_deinit(void); /** * \fn flash_itf_read * 读数据 * \param[in] addr 读开始地址 * \param[out] buffer 存储读出的数据 * \param[in] len 待读出的长度 * \retval 返回实际读出的数据长度 */ uint32_t flash_itf_read(uint8_t* buffer, uint32_t addr, uint32_t len); /** * \fn flash_itf_write * 写数据 * \param[in] addr 写开始地址 * \param[out] buffer 存储待写的数据 * \param[in] len 待写入的长度 * \retval 返回实际写入的数据长度 */ uint32_t flash_itf_write(uint8_t* buffer, uint32_t addr, uint32_t len); #ifdef __cplusplus } #endif #endif 测试 shell_func.c中 #include "flash_itf.h" static void printflashfunc(uint8_t* param); static void writeflashfunc(uint8_t* param); 添加两行命令 { (uint8_t*)"printflash", printflashfunc, (uint8_t*)"printflash addr[hex] len"}, { (uint8_t*)"writeflash", writeflashfunc, (uint8_t*)"writeflash addr[hex] hexstr"}, 实现如下 static int ascii2uc(const char c, unsigned char *uc) { if ((c >= '0') && (c <= '9')) { *uc = c - '0'; } else if ((c >= 'a') && (c <= 'f')) { *uc = c - 'a' + 10; } else if ((c >= 'A') && (c <= 'F')) { *uc = c - 'A' + 10; } else { return -1; } return 0; } static uint32_t str2hex(const char* str, unsigned char *buff, uint32_t len) { uint32_t num = 0; uint8_t hex = 0; while(1) { uint8_t tmp1; uint8_t tmp2; if(ascii2uc(*str++, &tmp1) < 0) { break; } if(ascii2uc(*str++, &tmp2) < 0) { break; } hex = tmp1*16 + tmp2; *buff++ = hex; num++; if(num >= len) { break; } } return num; } static void printflashfunc(uint8_t* param) { uint8_t buffer[16]; uint32_t addr; uint32_t len; if(2 == sscanf((const char*)param, "%*s %x %d", &addr, &len)) { uint32_t toread; uint32_t read = 0; while(read < len) { toread = ((len-read) > sizeof(buffer)) ? sizeof(buffer) : (len-read); flash_itf_read(buffer, addr+read, toread); read += toread; for(uint32_t i=0; i<toread ;i++) { xprintf("%02x ",buffer); } xprintf("\r\n"); } } } static void writeflashfunc(uint8_t* param) { uint8_t buffer[32+1]; uint8_t hex[16]; uint32_t addr; uint32_t len; if(2 == sscanf((const char*)param, "%*s %x %s", &addr, buffer)) { len = str2hex((const char*)buffer, hex, strlen((char*)buffer)); if(len>0) { flash_itf_write(hex,addr,len); } } } Main.c中初始化 #include "spi.h" #include "flash_itf.h" spi_init(0, 36000000ul, 0); flash_itf_init(); 看到增加了两个命令读写读可以看到写入后读出正确。总结以上实现了SPI驱动基于SPI FLASH驱动，可以进行FLASH的读写了，后面就可以基于此移植文件系统了。
发表了主题帖：【国民技术高性能MCU N32H487开发板】标准输入输出和shell移植

前言前面实现了串口的收发，基于此继续移植shell和printf，方便后面调试使用。移植printf 这里移植xprintf，一个精简的标准输入输出库。参考公众号文章 https://mp.weixin.qq.com/s/y4MHV3cd4T0b51L5M4J5Xg 代码xprintf.c /*------------------------------------------------------------------------/ / Universal String Handler for Console Input and Output /-------------------------------------------------------------------------/ / / Copyright (C) 2021, ChaN, all right reserved. / / xprintf module is an open source software. Redistribution and use of / xprintf module in source and binary forms, with or without modification, / are permitted provided that the following condition is met: / / 1. Redistributions of source code must retain the above copyright notice, / this condition and the following disclaimer. / / This software is provided by the copyright holder and contributors "AS IS" / and any warranties related to this software are DISCLAIMED. / The copyright owner or contributors be NOT LIABLE for any damages caused / by use of this software. / /-------------------------------------------------------------------------*/ #include "xprintf.h" #define SZB_OUTPUT 32 #if XF_USE_OUTPUT #include <stdarg.h> void (*xfunc_output)(int); /* Pointer to the default output device */ static char *strptr; /* Pointer to the output memory (used by xsprintf) */ #if XF_USE_FP /*----------------------------------------------*/ /* Floating point output */ /*----------------------------------------------*/ #include <math.h> static int ilog10 (double n) /* Calculate log10(n) in integer output */ { int rv = 0; while (n >= 10) { /* Decimate digit in right shift */ if (n >= 100000) { n /= 100000; rv += 5; } else { n /= 10; rv++; } } while (n < 1) { /* Decimate digit in left shift */ if (n < 0.00001) { n *= 100000; rv -= 5; } else { n *= 10; rv--; } } return rv; } static double i10x (int n) /* Calculate 10^n */ { double rv = 1; while (n > 0) { /* Left shift */ if (n >= 5) { rv *= 100000; n -= 5; } else { rv *= 10; n--; } } while (n < 0) { /* Right shift */ if (n <= -5) { rv /= 100000; n += 5; } else { rv /= 10; n++; } } return rv; } static void ftoa ( char* buf, /* Buffer to output the generated string */ double val, /* Real number to output */ int prec, /* Number of fractinal digits */ char fmt /* Notation */ ) { int d; int e = 0, m = 0; char sign = 0; double w; const char *er = 0; if (isnan(val)) { /* Not a number? */ er = "NaN"; } else { if (prec < 0) prec = 6; /* Default precision (6 fractional digits) */ if (val < 0) { /* Nagative value? */ val = -val; sign = '-'; } else { sign = '+'; } if (isinf(val)) { /* Infinite? */ er = "INF"; } else { if (fmt == 'f') { /* Decimal notation? */ val += i10x(-prec) / 2; /* Round (nearest) */ m = ilog10(val); if (m < 0) m = 0; if (m + prec + 3 >= SZB_OUTPUT) er = "OV"; /* Buffer overflow? */ } else { /* E notation */ if (val != 0) { /* Not a true zero? */ val += i10x(ilog10(val) - prec) / 2; /* Round (nearest) */ e = ilog10(val); if (e > 99 || prec + 6 >= SZB_OUTPUT) { /* Buffer overflow or E > +99? */ er = "OV"; } else { if (e < -99) e = -99; val /= i10x(e); /* Normalize */ } } } } if (!er) { /* Not error condition */ if (sign == '-') *buf++ = sign; /* Add a - if negative value */ do { /* Put decimal number */ w = i10x(m); /* Snip the highest digit d */ d = val / w; val -= d * w; if (m == -1) *buf++ = XF_DPC; /* Insert a decimal separarot if get into fractional part */ *buf++ = '0' + d; /* Put the digit */ } while (--m >= -prec); /* Output all digits specified by prec */ if (fmt != 'f') { /* Put exponent if needed */ *buf++ = fmt; if (e < 0) { e = -e; *buf++ = '-'; } else { *buf++ = '+'; } *buf++ = '0' + e / 10; *buf++ = '0' + e % 10; } } } if (er) { /* Error condition? */ if (sign) *buf++ = sign; /* Add sign if needed */ do *buf++ = *er++; while (*er); /* Put error symbol */ } *buf = 0; /* Term */ } #endif /* XF_USE_FLOAT */ /*----------------------------------------------*/ /* Put a character */ /*----------------------------------------------*/ void xputc ( int chr /* Character to be output */ ) { xfputc(xfunc_output, chr); /* Output it to the default output device */ } void xfputc ( /* Put a character to the specified device */ void(*func)(int), /* Pointer to the output function (null:strptr) */ int chr /* Character to be output */ ) { if (XF_CRLF && chr == '\n') xfputc(func, '\r'); /* CR -> CRLF */ if (func) { func(chr); /* Write a character to the output device */ } else if (strptr) { *strptr++ = chr; /* Write a character to the memory */ } } /*----------------------------------------------*/ /* Put a null-terminated string */ /*----------------------------------------------*/ void xputs ( /* Put a string to the default device */ const char* str /* Pointer to the string */ ) { xfputs(xfunc_output, str); } void xfputs ( /* Put a string to the specified device */ void(*func)(int), /* Pointer to the output function */ const char* str /* Pointer to the string */ ) { while (*str) { /* Put the string */ xfputc(func, *str++); } } /*----------------------------------------------*/ /* Formatted string output */ /*----------------------------------------------*/ /* xprintf("%d", 1234); "1234" xprintf("%6d,%3d%%", -200, 5); " -200, 5%" xprintf("%-6u", 100); "100 " xprintf("%ld", 12345678); "12345678" xprintf("%llu", 0x100000000); "4294967296" <XF_USE_LLI> xprintf("%lld", -1LL); "-1" <XF_USE_LLI> xprintf("%04x", 0xA3); "00a3" xprintf("%08lX", 0x123ABC); "00123ABC" xprintf("%016b", 0x550F); "0101010100001111" xprintf("%*d", 6, 100); " 100" xprintf("%s", "String"); "String" xprintf("%5s", "abc"); " abc" xprintf("%-5s", "abc"); "abc " xprintf("%-5s", "abcdefg"); "abcdefg" xprintf("%-5.5s", "abcdefg"); "abcde" xprintf("%-.5s", "abcdefg"); "abcde" xprintf("%-5.5s", "abc"); "abc " xprintf("%c", 'a'); "a" xprintf("%12f", 10.0); " 10.000000" <XF_USE_FP> xprintf("%.4E", 123.45678); "1.2346E+02" <XF_USE_FP> */ static void xvfprintf ( void(*func)(int), /* Pointer to the output function */ const char* fmt, /* Pointer to the format string */ va_list arp /* Pointer to arguments */ ) { unsigned int r, i, j, w, f; int n, prec; char str[SZB_OUTPUT], c, d, *p, pad; #if XF_USE_LLI long long v; unsigned long long uv; #else long v; unsigned long uv; #endif for (;;) { c = *fmt++; /* Get a format character */ if (!c) break; /* End of format? */ if (c != '%') { /* Pass it through if not a % sequense */ xfputc(func, c); continue; } f = w = 0; /* Clear parms */ pad = ' '; prec = -1; c = *fmt++; /* Get first char of the sequense */ if (c == '0') { /* Flag: left '0' padded */ pad = '0'; c = *fmt++; } else { if (c == '-') { /* Flag: left justified */ f = 2; c = *fmt++; } } if (c == '*') { /* Minimum width from an argument */ n = va_arg(arp, int); if (n < 0) { /* Flag: left justified */ n = 0 - n; f = 2; } w = n; c = *fmt++; } else { while (c >= '0' && c <= '9') { /* Minimum width */ w = w * 10 + c - '0'; c = *fmt++; } } if (c == '.') { /* Precision */ c = *fmt++; if (c == '*') { /* Precision from an argument */ prec = va_arg(arp, int); c = *fmt++; } else { prec = 0; while (c >= '0' && c <= '9') { prec = prec * 10 + c - '0'; c = *fmt++; } } } if (c == 'l') { /* Prefix: Size is long */ f |= 4; c = *fmt++; #if XF_USE_LLI if (c == 'l') { /* Prefix: Size is long long */ f |= 8; c = *fmt++; } #endif } if (!c) break; /* End of format? */ switch (c) { /* Type is... */ case 'b': /* Unsigned binary */ r = 2; break; case 'o': /* Unsigned octal */ r = 8; break; case 'd': /* Signed decimal */ case 'u': /* Unsigned decimal */ r = 10; break; case 'x': /* Hexdecimal (lower case) */ case 'X': /* Hexdecimal (upper case) */ r = 16; break; case 'c': /* A character */ xfputc(func, (char)va_arg(arp, int)); continue; case 's': /* String */ p = va_arg(arp, char*); /* Get a pointer argument */ if (!p) p = ""; /* Null ptr generates a null string */ j = strlen(p); if (prec >= 0 && j > (unsigned int)prec) j = prec; /* Limited length of string body */ for ( ; !(f & 2) && j < w; j++) xfputc(func, pad); /* Left pads */ while (*p && prec--) xfputc(func, *p++);/* String body */ while (j++ < w) xfputc(func, ' '); /* Right pads */ continue; #if XF_USE_FP case 'f': /* Float (decimal) */ case 'e': /* Float (e) */ case 'E': /* Float (E) */ ftoa(p = str, va_arg(arp, double), prec, c); /* Make fp string */ for (j = strlen(p); !(f & 2) && j < w; j++) xfputc(func, pad); /* Left pads */ while (*p) xfputc(func, *p++); /* Value */ while (j++ < w) xfputc(func, ' '); /* Right pads */ continue; #endif default: /* Unknown type (passthrough) */ xfputc(func, c); continue; } /* Get an integer argument and put it in numeral */ #if XF_USE_LLI if (f & 8) { /* long long argument? */ v = (long long)va_arg(arp, long long); } else { if (f & 4) { /* long argument? */ v = (c == 'd') ? (long long)va_arg(arp, long) : (long long)va_arg(arp, unsigned long); } else { /* int/short/char argument */ v = (c == 'd') ? (long long)va_arg(arp, int) : (long long)va_arg(arp, unsigned int); } } #else if (f & 4) { /* long argument? */ v = (long)va_arg(arp, long); } else { /* int/short/char argument */ v = (c == 'd') ? (long)va_arg(arp, int) : (long)va_arg(arp, unsigned int); } #endif if (c == 'd' && v < 0) { /* Negative value? */ v = 0 - v; f |= 1; } i = 0; uv = v; do { /* Make an integer number string */ d = (char)(uv % r); uv /= r; if (d > 9) d += (c == 'x') ? 0x27 : 0x07; str[i++] = d + '0'; } while (uv != 0 && i < sizeof str); if (f & 1) str[i++] = '-'; /* Sign */ for (j = i; !(f & 2) && j < w; j++) xfputc(func, pad); /* Left pads */ do xfputc(func, str[--i]); while (i != 0); /* Value */ while (j++ < w) xfputc(func, ' '); /* Right pads */ } } void xprintf ( /* Put a formatted string to the default device */ const char* fmt, /* Pointer to the format string */ ... /* Optional arguments */ ) { va_list arp; va_start(arp, fmt); xvfprintf(xfunc_output, fmt, arp); va_end(arp); } void xfprintf ( /* Put a formatted string to the specified device */ void(*func)(int), /* Pointer to the output function */ const char* fmt, /* Pointer to the format string */ ... /* Optional arguments */ ) { va_list arp; va_start(arp, fmt); xvfprintf(func, fmt, arp); va_end(arp); } void xsprintf ( /* Put a formatted string to the memory */ char* buff, /* Pointer to the output buffer */ const char* fmt, /* Pointer to the format string */ ... /* Optional arguments */ ) { va_list arp; strptr = buff; /* Enable destination for memory */ va_start(arp, fmt); xvfprintf(0, fmt, arp); va_end(arp); *strptr = 0; /* Terminate output string */ strptr = 0; /* Disable destination for memory */ } #if XF_USE_DUMP /*----------------------------------------------*/ /* Dump a line of binary dump */ /*----------------------------------------------*/ void put_dump ( const void* buff, /* Pointer to the array to be dumped */ unsigned long addr, /* Heading address value */ int len, /* Number of items to be dumped */ size_t width /* Size of buff[0] (1, 2 or 4) */ ) { int i; const unsigned char *bp; const unsigned short *sp; const unsigned long *lp; xprintf("%08lX ", addr); /* address */ switch (width) { case sizeof (char): bp = buff; for (i = 0; i < len; i++) { /* Hexdecimal dump in (char) */ xprintf(" %02X", bp[i]); } xputs(" "); for (i = 0; i < len; i++) { /* ASCII dump */ xputc((unsigned char)((bp[i] >= ' ' && bp[i] <= '~') ? bp[i] : '.')); } break; case sizeof (short): sp = buff; do { /* Hexdecimal dump in (short) */ xprintf(" %04X", *sp++); } while (--len); break; case sizeof (long): lp = buff; do { /* Hexdecimal dump in (short) */ xprintf(" %08lX", *lp++); } while (--len); break; } xputc('\n'); } #endif /* XF_USE_DUMP */ #endif /* XF_USE_OUTPUT */ #if XF_USE_INPUT int (*xfunc_input)(void); /* Pointer to the default input stream */ /*----------------------------------------------*/ /* Get a line from the input */ /*----------------------------------------------*/ int xgets ( /* 0:End of stream, 1:A line arrived */ char* buff, /* Pointer to the buffer */ int len /* Buffer length */ ) { int c, i; if (!xfunc_input) return 0; /* No input function is specified */ i = 0; for (;;) { c = xfunc_input(); /* Get a char from the incoming stream */ if (c < 0 || c == '\r') break; /* End of stream or CR? */ if (c == '\b' && i) { /* BS? */ i--; if (XF_INPUT_ECHO) xputc(c); continue; } if (c >= ' ' && i < len - 1) { /* Visible chars? */ buff[i++] = c; if (XF_INPUT_ECHO) xputc(c); } } if (XF_INPUT_ECHO) { xputc('\r'); xputc('\n'); } buff[i] = 0; /* Terminate with a \0 */ return (int)(c == '\r'); } /*----------------------------------------------*/ /* Get a value of integer string */ /*----------------------------------------------*/ /* "123 -5 0x3ff 0b1111 0377 w " ^ 1st call returns 123 and next ptr ^ 2nd call returns -5 and next ptr ^ 3rd call returns 1023 and next ptr ^ 4th call returns 15 and next ptr ^ 5th call returns 255 and next ptr ^ 6th call fails and returns 0 */ int xatoi ( /* 0:Failed, 1:Successful */ char **str, /* Pointer to pointer to the string */ long *res /* Pointer to the valiable to store the value */ ) { unsigned long val; unsigned char c, r, s = 0; *res = 0; while ((c = **str) == ' ') (*str)++; /* Skip leading spaces */ if (c == '-') { /* negative? */ s = 1; c = *(++(*str)); } if (c == '0') { c = *(++(*str)); switch (c) { case 'x': /* hexdecimal */ r = 16; c = *(++(*str)); break; case 'b': /* binary */ r = 2; c = *(++(*str)); break; default: if (c <= ' ') return 1; /* single zero */ if (c < '0' || c > '9') return 0; /* invalid char */ r = 8; /* octal */ } } else { if (c < '0' || c > '9') return 0; /* EOL or invalid char */ r = 10; /* decimal */ } val = 0; while (c > ' ') { if (c >= 'a') c -= 0x20; c -= '0'; if (c >= 17) { c -= 7; if (c <= 9) return 0; /* invalid char */ } if (c >= r) return 0; /* invalid char for current radix */ val = val * r + c; c = *(++(*str)); } if (s) val = 0 - val; /* apply sign if needed */ *res = val; return 1; } #if XF_USE_FP /*----------------------------------------------*/ /* Get a value of the real number string */ /*----------------------------------------------*/ /* Float version of xatoi */ int xatof ( /* 0:Failed, 1:Successful */ char **str, /* Pointer to pointer to the string */ double *res /* Pointer to the valiable to store the value */ ) { double val; int s, f, e; unsigned char c; *res = 0; s = f = 0; while ((c = **str) == ' ') (*str)++; /* Skip leading spaces */ if (c == '-') { /* Negative? */ c = *(++(*str)); s = 1; } else if (c == '+') { /* Positive? */ c = *(++(*str)); } if (c == XF_DPC) { /* Leading dp? */ f = -1; /* Start at fractional part */ c = *(++(*str)); } if (c <= ' ') return 0; /* Wrong termination? */ val = 0; while (c > ' ') { /* Get a value of decimal */ if (c == XF_DPC) { /* Embedded dp? */ if (f < 0) return 0; /* Wrong dp? */ f = -1; /* Enter fractional part */ } else { if (c < '0' || c > '9') break; /* End of decimal? */ c -= '0'; if (f == 0) { /* In integer part */ val = val * 10 + c; } else { /* In fractional part */ val += i10x(f--) * c; } } c = *(++(*str)); } if (c > ' ') { /* It may be an exponent */ if (c != 'e' && c != 'E') return 0; /* Wrong character? */ c = *(++(*str)); if (c == '-') { c = *(++(*str)); s |= 2; /* Negative exponent */ } else if (c == '+') { c = *(++(*str)); /* Positive exponent */ } if (c <= ' ') return 0; /* Wrong termination? */ e = 0; while (c > ' ') { /* Get value of exponent */ c -= '0'; if (c > 9) return 0; /* Not a numeral? */ e = e * 10 + c; c = *(++(*str)); } val *= i10x((s & 2) ? -e : e); /* Apply exponent */ } if (s & 1) val = -val; /* Negate sign if needed */ *res = val; return 1; } #endif /* XF_USE_FP */ #endif /* XF_USE_INPUT */ Xprintf.h /*------------------------------------------------------------------------*/ /* Universal string handler for user console interface (C)ChaN, 2021 */ /*------------------------------------------------------------------------*/ #ifndef XPRINTF_DEF #define XPRINTF_DEF #include <string.h> #ifdef __cplusplus extern "C" { #endif #define XF_USE_OUTPUT 1 /* 1: Enable output functions */ #define XF_CRLF 1 /* 1: Convert \n ==> \r\n in the output char */ #define XF_USE_DUMP 1 /* 1: Enable put_dump function */ #define XF_USE_LLI 1 /* 1: Enable long long integer in size prefix ll */ #define XF_USE_FP 1 /* 1: Enable support for floating point in type e and f */ #define XF_DPC '.' /* Decimal separator for floating point */ #define XF_USE_INPUT 1 /* 1: Enable input functions */ #define XF_INPUT_ECHO 0 /* 1: Echo back input chars in xgets function */ #if defined(__GNUC__) && __GNUC__ >= 10 #pragma GCC diagnostic ignored "-Wcast-function-type" #endif #if XF_USE_OUTPUT #define xdev_out(func) xfunc_output = (void(*)(int))(func) extern void (*xfunc_output)(int); void xputc (int chr); void xfputc (void (*func)(int), int chr); void xputs (const char* str); void xfputs (void (*func)(int), const char* str); void xprintf (const char* fmt, ...); void xsprintf (char* buff, const char* fmt, ...); void xfprintf (void (*func)(int), const char* fmt, ...); void put_dump (const void* buff, unsigned long addr, int len, size_t width); #endif #if XF_USE_INPUT #define xdev_in(func) xfunc_input = (int(*)(void))(func) extern int (*xfunc_input)(void); int xgets (char* buff, int len); int xatoi (char** str, long* res); int xatof (char** str, double* res); #endif #ifdef __cplusplus } #endif #endif 适配接口 static void xprintf_out_port(int ch) { uint8_t val = ch; uart_send(0,&val,1); } static int xprintf_in_port(void) { uint32_t len; uint8_t val; do { len = uart_read(0,&val,1); }while(len == 0); return val; } 初始化指定接口 #include "xprintf.h" xdev_out(xprintf_out_port); xdev_in(xprintf_in_port); 移植shell 参考公众号文章 https://mp.weixin.qq.com/s/XLmbJn0SKoDT1aLdxHDrbg 适配接口 #include "shell.h" #include "shell_func.h" uint32_t shell_read(uint8_t *buff, uint32_t len) { return uart_read(0,buff,len); } void shell_write(uint8_t *buff, uint32_t len) { uart_send(0,buff,len); } shell_set_itf(shell_read, shell_write, (shell_cmd_cfg*)g_shell_cmd_list_ast, 1); 代码 Shell.c #include <stdint.h> #include "shell.h" shell_read_pf s_input_pf = 0; /* 输入接口指针 */ shell_write_pf s_output_pf = 0; /* 输出接口指针 */ shell_cmd_cfg* s_cmd_cfg_pst = 0; /* 命令列表指针 */ uint8_t s_enableecho_u8 = 0; /* 是否使能echo标志 */ static uint8_t s_cmd_buf_au8[SHELL_CMD_LEN]="\r"; /* 命令缓冲区 */ static uint32_t s_cmd_buf_index_u32 = 0; /* 当前命令缓冲区中字符数 */ /** * 输出字符接口 */ static void shell_putchar(uint8_t val) { uint8_t tmp; if(s_output_pf != 0) { tmp = val; s_output_pf(&tmp, 1); } } /** * 输出字符串接口 */ static void shell_putstring(char* str) { uint32_t len = 0; uint8_t*p = (uint8_t*)str; while(*str++) { len++; } s_output_pf(p, len); } /** * 读字符接口 */ static int shell_getchar(uint8_t *data) { if(s_input_pf == 0) { return -1; } if(0 == s_input_pf(data, 1)) { return -1; } else { return 0; } } /** * 判断命令字符串的长度 * 命令字符串不能有空格 */ static uint32_t shell_cmd_len(uint8_t *cmd) { uint8_t *p = cmd; uint32_t len = 0; while((*p != ' ') && (*p != 0)) { p++; len++; } return len; } /** * 判断两个字符串是否相等,相等返回0 */ static int shell_cmd_check(uint8_t *cmd, uint8_t *str) { uint32_t len1 = shell_cmd_len(cmd); uint32_t len2 = shell_cmd_len(str); if(len1 != len2) { return -1; } for(uint32_t i=0; i<len1; i++) { if(*cmd++ != *str++) { return -1; } } return 0; } /** * 读取一行命令 */ static uint32_t shell_read_line(void) { uint8_t ch; uint32_t count; /* 初始打印sh> */ if(s_cmd_buf_au8[0]=='\r') { shell_putstring("sh>\r\n"); s_cmd_buf_au8[0] = 0; } /* 非阻塞读取一个字符 */ if(shell_getchar(&ch) !=0 ) { return 0; } /* 遇到除了退格之外的不可打印字符,则认为收到一行命令 * 退格需要单独处理,需要删除一个字符 */ if((ch == '\r' || ch == '\n' || ch < ' ' || ch > '~') && (ch != '\b')) { if(s_cmd_buf_index_u32==0) { /* 缓冲区没有数据就收到了非打印字符串,则打印提示sh> */ shell_putstring("sh>\r\n"); } else { /* 收到了非打印字符,且缓冲区有数据则认为收到了一行 * 返回缓冲区数据长度,并清零计数,打印回车换行 * 并且添加结束符0 */ count = s_cmd_buf_index_u32; s_cmd_buf_au8[s_cmd_buf_index_u32]=0; s_cmd_buf_index_u32 =0; shell_putstring("\r\n"); return count; } } else { if(ch == '\b') { /* 退格处理,注意只有有数据才会删除一个字符，添加结束符 */ if(s_cmd_buf_index_u32 != 0) { s_cmd_buf_index_u32--; shell_putchar('\b'); shell_putchar(' '); shell_putchar('\b'); s_cmd_buf_au8[s_cmd_buf_index_u32]= '\0'; } } else { /* 可打印字符，添加到缓冲区 * 如果数据量已经到了缓冲区大小-1,则也认为是一行命令 * -1是保证最后有结束符0空间 */ if(s_enableecho_u8 != 0) { shell_putchar(ch); } s_cmd_buf_au8[s_cmd_buf_index_u32++] = ch; if(s_cmd_buf_index_u32>=(sizeof(s_cmd_buf_au8)-1)) { count = s_cmd_buf_index_u32; s_cmd_buf_au8[s_cmd_buf_index_u32]=0; s_cmd_buf_index_u32 =0; shell_putstring("\r\n"); return count; } } } return 0; } /** * 搜寻命令列表处理命令 */ static int shell_exec_cmdlist(uint8_t* cmd) { int i; if(s_cmd_cfg_pst == 0) { return -1; } for (i=0; s_cmd_cfg_pst[i].name != 0; i++) { if (shell_cmd_check(cmd, s_cmd_cfg_pst[i].name) == 0) { s_cmd_cfg_pst[i].func(cmd); return 0; } } if(s_cmd_cfg_pst[i].name == 0) { shell_putstring("unkown command\r\n"); return -1; } return 0; } /** * 对外接口,周期执行 */ void shell_exec(void) { if(shell_read_line() > 0) { shell_exec_cmdlist(s_cmd_buf_au8); } } /** * 对外接口,初始化配置接口 */ void shell_set_itf(shell_read_pf input, shell_write_pf output, shell_cmd_cfg* cmd_list, uint8_t enableecho) { s_input_pf = input; s_output_pf = output; s_cmd_cfg_pst = cmd_list; s_enableecho_u8 = enableecho; } Shell.h #ifndef SHELL_H #define SHELL_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> #define SHELL_CMD_LEN 64 /**< 命令缓冲区大小 */ typedef void (*shell_command_pf)(uint8_t *); /**< 命令回调函数 */ typedef uint32_t (*shell_read_pf)(uint8_t *buff, uint32_t len); /**< 底层收接口 */ typedef void (*shell_write_pf)(uint8_t *buff, uint32_t len); /**< 底层发接口 */ /** * \struct shell_cmd_cfg * 命令信息 */ typedef struct { uint8_t * name; /**< 命令字符串 */ shell_command_pf func; /**< 命令回调函数 */ uint8_t * helpstr; /**< 命令帮助信息 */ }shell_cmd_cfg; /** * \fn shell_exec * 周期调用该函数,读取底层输入,并判断是否有命令进行处理 * 非阻塞 */ void shell_exec(void); /** * \fn shell_set_itf * 设置底层输入输出接口,以及命令列表 * 调用shell_exec_shellcmd之前,需要先调用该接口初始化 * \param[in] input \ref shell_read_pf 输入接口 * \param[in] output \ref shell_write_pf 输出接口 * \param[in] cmd_list \ref shell_cmd_cfg 命令列表 * \param[in] enableecho 0:不使能回显, 其他值:使能回显 */ void shell_set_itf(shell_read_pf input, shell_write_pf output, shell_cmd_cfg* cmd_list, uint8_t enableecho); #ifdef __cplusplus } #endif #endif Shell_func.c #include <stdio.h> #include "shell.h" #include "shell_func.h" #include "xprintf.h" #include "uart.h" static void helpfunc(uint8_t* param); /** * 最后一行必须为0,用于结束判断 */ const shell_cmd_cfg g_shell_cmd_list_ast[ ] = { { (uint8_t*)"help", helpfunc, (uint8_t*)"help"}, { (uint8_t*)0, 0 , 0}, }; static void helpfunc(uint8_t* param) { (void)param; unsigned int i; xprintf("\r\n"); xprintf("**************\r\n"); xprintf("* SHELL *\r\n"); xprintf("* V1.0 *\r\n"); xprintf("**************\r\n"); xprintf("\r\n"); for (i=0; g_shell_cmd_list_ast[i].name != 0; i++) { xprintf("%02d.",i); xprintf("%-16s",g_shell_cmd_list_ast[i].name); xprintf("%s\r\n",g_shell_cmd_list_ast[i].helpstr); } } Shell_func.h #ifndef SHELL_FUNC_H #define SHELL_FUNC_H #include <stdint.h> #ifdef __cplusplus extern "C" { #endif extern const shell_cmd_cfg g_shell_cmd_list_ast[ ]; #ifdef __cplusplus } #endif #endif 测试周期调用 shell_exec(); 串口终端，输入help可以查看命令总结以上移植了标准输入输出接口，移植了shell，可以方便的增加命令，打印输出，进行调试了。
发表了主题帖：【国民技术高性能MCU N32H487开发板】串口驱动与测试

前言本文来测试串口收发，并基于fifo实现串口驱动，提供方便使用的串口读写接口。方便后续调试开发。 FIFO实现参考公众号文章 https://mp.weixin.qq.com/s/MvL9eDesyuxD60fnbl1nag 串口驱动实现参考上述公众号文章其他文章引脚使用PA9和PA10，连接到了板载的仿真器串口初始化引脚 PA9 AF17 TX PA10 AF18 RX 引脚配置，时钟使能，串口配置，中断配置 RCC_EnableAHB1PeriphClk(RCC_AHB_PERIPHEN_GPIOA,ENABLE); GPIO_InitType GPIO_InitStructure; /* Initialize GPIO_InitStructure */ GPIO_InitStruct(&GPIO_InitStructure); /* Configure USART3 Tx PA9 AF17 as alternate function push-pull */ GPIO_InitStructure.Pin = GPIO_PIN_9; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF17; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); /* Configure USART3 Rx PA10 AF18 as alternate function push-pull */ GPIO_InitStructure.Pin = GPIO_PIN_10; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF18; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_USART3,ENABLE); USART_InitType USART_InitStructure; /* USARTy and USARTz configuration */ USART_StructInit(&USART_InitStructure); USART_InitStructure.BaudRate = baud; USART_InitStructure.WordLength = USART_WL_8B; USART_InitStructure.StopBits = USART_STPB_1; USART_InitStructure.Parity = USART_PE_NO; USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE; USART_InitStructure.OverSampling = USART_16OVER; USART_InitStructure.Mode = USART_MODE_RX | USART_MODE_TX; /* Configure USART3 */ USART_Init(USART3, &USART_InitStructure); /* Enable the USART3 */ USART_Enable(USART3, ENABLE); USART_ConfigInt(USART3, USART_INT_RXDNE, ENABLE); NVIC_SetPriority(USART3_IRQn,2); NVIC_EnableIRQ(USART3_IRQn); 中断服务程序收到数据写入fifo，并清除标志 void USART3_IRQHandler(void) { uint8_t ch; ch = USART_ReceiveData(USART3); USART_ClrFlag(USART3, USART_FLAG_RXDNE); USART_ClrFlag(USART3, USART_FLAG_IDLEF); USART_ClrFlag(USART3, USART_FLAG_OREF); uart_rx_cb(0, &ch, 1); } 发送查询发送 uint32_t uart_send(int id, uint8_t* buffer, uint32_t len) { if(id == 0){ for(uint32_t i=0;i<len;i++) { while(USART_GetFlagStatus(USART3, USART_FLAG_TXC) == 0); USART_SendData(USART3,buffer); } }else if(id == 1){ } return len; } 测试 Main.c中 #include "uart.h" 收到数据原样返回 int main(void) { uart_init(0,115200); while (1) { uint8_t rx_buffer[64]; uint32_t len = uart_read(0,rx_buffer,sizeof(rx_buffer)); if(len > 0){ uart_send(0,rx_buffer,len); } } } 上位机发送数据，板子原样返回完整代码 Fifo.c #include <string.h> #include "fifo.h" #define FIFO_PARAM_CHECK 0 /** * in为写入索引 0~(buffer_len-1)。 * out为读出索引 0~(buffer_len-1)。 * in == out时可能是满,也可能是空,可以通过len有效数据长度来确认。 * 写数据in增加,直到追赶到out则满。 * 读数据则out增加,直到追赶到in则空。 * in大于out时则[out,in)区间是有效数据。 * in小于out时则[out,buffer_len)和[0,in)区间是有效数据。 *********************************************************** * 0 buffer_len-1 buffer_len * （1）开始 in和out都是0 * | | * in(0) * out(0) * len = 0 * （2）写入n字节数据 in变为n和out还是0 对应in大于out的情况 * | | * out(0)————————————>in(n) | * len = n * （3）读出m字节数据(m<n) in还是n和out变为m 对应in大于out的情况 * | | * out(m)————>in(n) * len = n-m * （4）继续写入数据,绕回到开头,对应in小于out的情况 * | | * out(m)————————————————————————————————> * ——>in(k) * len = k + buffer_len-m */ uint32_t fifo_in(fifo_st* dev, uint8_t* buffer, uint32_t len) { uint32_t space = 0; /* 用于记录空闲空间大小 */ /* 参数检查 */ #if FIFO_PARAM_CHECK if((dev == 0) || (buffer == 0) || (len == 0)) { return 0; } if(dev->buffer == 0) { return 0; } #endif /* 限制len的最大长度为buffer大小 */ if(len > dev->buffer_len) { len = dev->buffer_len; } /* 计算空闲空间大小 * 正常dev->len不应该大于dev->buffer_len */ if(dev->buffer_len >= dev->len) { space = dev->buffer_len - dev->len; } else { /* 这里不应该出现, 出现则是异常 */ dev->len = 0; space = dev->buffer_len; } /* 计算待写入大小, 如果len大于剩余空间则只写入剩余空间大小 */ len = (len >= space) ? space : len; if(len == 0) { return 0; /* 这里有可能无剩余空间,直接返回 */ } /* 计算len的长度是否需要有绕回,需要分次写入 */ space = dev->buffer_len - dev->in; /* 当前写入位置in到缓存末尾剩余可写入空间 */ if(space >= len) { /* 当前写入位置in到缓存末尾足够一次写入 */ memcpy(dev->buffer+dev->in,buffer,len); } else { /* 当前写入位置in到缓存末尾不够,还需要绕回到前面写 */ memcpy(dev->buffer+dev->in,buffer,space); /* 先写入tail部分 */ memcpy(dev->buffer,buffer+space,len-space); /* 再写入绕回头部分 */ } /* 更新写入索引和有效数据长度 */ dev->in += len; if(dev->in >= dev->buffer_len) { dev->in -= dev->buffer_len; /* 判断加减法替代 dev->in %= dev->buffer->len */ } dev->len += len; /* dev->len最大dev->buffer->len,无需%= dev->buffer->len */ return len; } uint32_t fifo_out(fifo_st* dev, uint8_t* buffer, uint32_t len) { uint32_t space = 0; /* 参数检查 */ #if FIFO_PARAM_CHECK if((dev == 0) || (buffer == 0) || (len == 0)) { return 0; } if(dev->buffer == 0) { return 0; } #endif /* 判断是否有数据 */ if(dev->len == 0) { return 0; } /* 可读出数据量取需要的和有的之间的小值 */ len = (dev->len) > len ? len : dev->len; /* 计算len的长度是否需要有绕回,需要分次读出 */ space = dev->buffer_len - dev->out; /* 当前读出位置out到缓存末尾剩余可读出空间 */ if(space >= len) { /* 当前读出位置out到缓存末尾足够一次读出 */ memcpy(buffer,dev->buffer+dev->out,len); } else { /* 当前读出位置out到缓存末尾不够,还需要绕回到前面读 */ memcpy(buffer,dev->buffer+dev->out,space); /* 先读出tail部分 */ memcpy(buffer+space,dev->buffer,len-space); /* 再读出绕回头部分 */ } /* 更新读出索引和有效数据长度 */ dev->out += len; if(dev->out >= dev->buffer_len) { dev->out -= dev->buffer_len; /* 判断加减法替代 dev->out %= dev->buffer->len */ } dev->len -= len; /* 这里dev->len 不可能小于len,不会溢出 */ return len; } uint32_t fifo_getlen(fifo_st* dev) { #if FIFO_PARAM_CHECK if(dev == 0) { return 0; } #endif return dev->len; } void fifo_clean(fifo_st* dev) { #if FIFO_PARAM_CHECK if(dev == 0) { return 0; } #endif dev->len = 0; dev->in = 0; dev->out = 0; } uint32_t fifo_getfree(fifo_st* dev) { if(dev == 0) { return 0; } return dev->buffer_len - dev->len; } Fifo.h #ifndef FIFO_H #define FIFO_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> /** * \struct fifo_st * FIFO缓冲区结构. */ typedef struct { uint32_t in; /**< 写入索引 */ uint32_t out; /**< 读出索引 */ uint32_t len; /**< 有效数据长度 */ uint32_t buffer_len; /**< 有效长度 */ uint8_t* buffer; /**< 缓存,用户分配 */ } fifo_st; /** * \fn fifo_in * 往fifo里写数据 * \param[in] dev \ref fifo_st * \param[in] buffer 待写入的数据 * \param[in] len 待写入的长度 * \retval 返回实际写入的数据量 */ uint32_t fifo_in(fifo_st* dev, uint8_t* buffer, uint32_t len); /** * \fn fifo_out * 从fifo读出数据 * \param[in] dev \ref fifo_st * \param[in] buffer 存读出的数据 * \param[in] len 需要读出的数据长度 * \retval 返回实际读出的数据量 */ uint32_t fifo_out(fifo_st* dev, uint8_t* buffer, uint32_t len); uint32_t fifo_getlen(fifo_st* dev); void fifo_clean(fifo_st* dev); uint32_t fifo_getfree(fifo_st* dev); #ifdef __cplusplus } #endif #endif Uart.c #include "uart.h" #include "fifo.h" #include "n32h47x_48x.h" #include "n32h47x_48x_rcc.h" #include "n32h47x_48x_gpio.h" #include "n32h47x_48x_exti.h" #include "n32h47x_48x_usart.h" #include "n32h47x_48x_dma.h" #define CriticalAlloc() #define EnterCritical() __disable_irq() #define ExitCritical() __enable_irq() uint8_t s_uart_rx0_buffer[1029]; uint8_t s_uart_rx1_buffer[16]; static fifo_st s_uart_fifo_dev[2]= { { .in = 0, .len = 0, .out = 0, .buffer = s_uart_rx0_buffer, .buffer_len = sizeof(s_uart_rx0_buffer), }, { .in = 0, .len = 0, .out = 0, .buffer = s_uart_rx1_buffer, .buffer_len = sizeof(s_uart_rx1_buffer), } }; void uart_rx_cb(int id, uint8_t* buff, uint32_t len) { fifo_in(&(s_uart_fifo_dev[id]), buff, len); } void USART3_IRQHandler(void) { uint8_t ch; ch = USART_ReceiveData(USART3); USART_ClrFlag(USART3, USART_FLAG_RXDNE); USART_ClrFlag(USART3, USART_FLAG_IDLEF); USART_ClrFlag(USART3, USART_FLAG_OREF); uart_rx_cb(0, &ch, 1); } void uart_init(int id, uint32_t baud) { if(id == 0){ RCC_EnableAHB1PeriphClk(RCC_AHB_PERIPHEN_GPIOA,ENABLE); GPIO_InitType GPIO_InitStructure; /* Initialize GPIO_InitStructure */ GPIO_InitStruct(&GPIO_InitStructure); /* Configure USART3 Tx PA9 AF17 as alternate function push-pull */ GPIO_InitStructure.Pin = GPIO_PIN_9; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF17; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); /* Configure USART3 Rx PA10 AF18 as alternate function push-pull */ GPIO_InitStructure.Pin = GPIO_PIN_10; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF18; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_USART3,ENABLE); USART_InitType USART_InitStructure; /* USARTy and USARTz configuration */ USART_StructInit(&USART_InitStructure); USART_InitStructure.BaudRate = baud; USART_InitStructure.WordLength = USART_WL_8B; USART_InitStructure.StopBits = USART_STPB_1; USART_InitStructure.Parity = USART_PE_NO; USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE; USART_InitStructure.OverSampling = USART_16OVER; USART_InitStructure.Mode = USART_MODE_RX | USART_MODE_TX; /* Configure USART3 */ USART_Init(USART3, &USART_InitStructure); /* Enable the USART3 */ USART_Enable(USART3, ENABLE); USART_ConfigInt(USART3, USART_INT_RXDNE, ENABLE); NVIC_SetPriority(USART3_IRQn,2); NVIC_EnableIRQ(USART3_IRQn); }else if(id == 1){ } } uint32_t uart_send(int id, uint8_t* buffer, uint32_t len) { if(id == 0){ for(uint32_t i=0;i<len;i++) { while(USART_GetFlagStatus(USART3, USART_FLAG_TXC) == 0); USART_SendData(USART3,buffer[i]); } }else if(id == 1){ } return len; } uint32_t uart_read(int id, uint8_t* buffer, uint32_t len) { uint32_t rlen; CriticalAlloc(); EnterCritical(); rlen = fifo_out(&(s_uart_fifo_dev[id]), buffer, len); ExitCritical(); return rlen; } Uart.h #ifndef UART_H #define UART_H #ifdef __cplusplus extern "C" { #endif #include <stdint.h> void uart_init(int id, uint32_t baud); uint32_t uart_send(int id, uint8_t* buffer, uint32_t len); uint32_t uart_read(int id, uint8_t* buffer, uint32_t len); #ifdef __cplusplus } #endif #endif 总结以上实现了串口收发驱动，并进行了测试，提供了串口读写接口，方便后面使用。
发表了主题帖：【国民技术高性能MCU N32H487开发板】系统跑240MHz并输出MCO时钟测试

前言本文分享下系统使用HSE跑最大240MHz，并输出MCO时钟验证时钟正确性。配置使用HSE system_n32h47x_48x.c中使用HSE PLL #ifndef SYSCLK_SRC #define SYSCLK_SRC SYSCLK_USE_HSE_PLL #endif HSE频率要和 n32h47x_48x.h中对应 #if !defined HSE_VALUE #define HSE_VALUE (8000000U) /* Value of the External oscillator in Hz */ #endif /* HSE_VALUE */ 原理图如下 J6 J9断开默认系统跑240MHz #ifndef SYSCLK_FREQ #if defined (N32H473) || defined (N32H474) #define SYSCLK_FREQ 200000000 #elif defined (N32H475) || defined (N32H482) || defined (N32H487) #define SYSCLK_FREQ 240000000 #else #error wrong macro definition #endif FLASH等待时间如下自动根据系统频率设置FLASH等待时间，这里代码自动根据频率修改，无需手动去修改，更严谨，避免用户不知道或者忘记修改导致问题。 /* Flash wait state 0: HCLK <= 40M 1: HCLK <= 80M 2: HCLK <= 120M 3: HCLK <= 160M 4: HCLK <= 200M 5: HCLK <= 240M */ tmpregister = FLASH->AC; tmpregister &= (uint32_t)((uint32_t)~FLASH_AC_LATENCY); tmpregister |= (uint32_t)((SYSCLK_FREQ - 1) / 40000000); FLASH->AC = tmpregister; 时钟输出引脚输出最大频率50MHz 测试使用PLL分频 240MHz分频6得到40MHz，测试看到时钟是正确的。 void mco_init(void) { GPIO_InitType GPIO_InitStructure; /* Initialize GPIO_InitStructure */ GPIO_InitStruct(&GPIO_InitStructure); /* Configure MCO1 PA7 alternate function AF13 push-pull */ GPIO_InitStructure.Pin = GPIO_PIN_7; GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.GPIO_Alternate = GPIO_AF13; GPIO_InitStructure.GPIO_Pull = GPIO_PULL_UP; GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure); RCC_ConfigMcoClkPre(RCC_MCO_PLLCLK_DIV6); RCC_ConfigMco1(RCC_MCO_PLL_PRES); } 实际直接输出系统时钟240MHz也是可以的，只是受限于引脚输出能力,幅值会无法达到摆幅。 RCC_ConfigMco1(RCC_MCO_SYSCLK); 总结系统时钟可以跑240Mhz，时钟准确，这在MCU中是比较高的了。驱动库完善可以很方便的实现功能。库函数的注释也非常详细，参数注释详细，直接看h文件即可。相比其他厂家同类型的库，这里在配置系统时钟后自动修改flash等待时间，相比其他库需要手动修改更严谨，避免用户忘记修改导致问题，这也体现厂家开发的细节值得点赞。
2025-03-30
发表了主题帖：【国民技术高性能MCU N32H487开发板】开发环境搭建

前言本文分享N32H48x的开发环境搭建。官网下载资料下载需要先注册登录 https://www.nationstech.com/support/dow/?typesof=1508下搜索N32H48 下载SDK https://www.nationstech.com/support/dow/?typesof=1507下搜索N32H48 下载文档下载开发板资料 https://bbs.eeworld.com.cn/elecplay/content/54b161d1 开发环境搭建解压N32H48x_SDK.zip 双击 N32H48x_SDK\6-Software Development Kit\Nations.N32H48x_DFP.1.0.0.pack安装MDK的支持包。如果提示错误,则右键点击pack文件,选择属性打开方式选择为D:\Keil_v5\UV4\PackUnzip.exe 此时就可以直接双击安装。(我这里是MDK5.40) 安装位于 D:\Keil_v5\Packs\Nationstech\N32H48x_DFP\1.0.0 打开N32H48x_SDK\6-Software Development Kit\Nations.N32H47x_48x_Library.1.0.0\projects\n32h47x_48x_EVAL\examples\USART\Printf\MDK-ARM下的Printf.uvprojx 选择芯片型号设置编译器设置宏修改选择编译的汇编文件编译设置仿真器识别到芯片添加下载算法点击进入debug运行看到串口打印如下，注意跳线连接串口参数115200-8-n-1 总结文档资料全面,比较规范,下载方便,在国内厂家中是非常难得的了。资料的搜索过滤批量下载也非常好用。官网下载中心的文档最好按照芯片系列过滤划分,现在是所有的都是在一起的有点乱。注意pack如果安装失败,需要选择关联程序PackUnzip.exe 建议mini USB换成type-c，至少也要换成micro usb了，mini usb线真的很少用了。
发表了主题帖：【米尔-STM32MP257开发板试用体验】开箱与板载资源介绍视频
2025-03-25
回复了主题帖：测评入围名单：国民技术高性能MCU N32H487开发板

个人信息无误，确认可以完成测评分享计划
2025-03-14
回复了主题帖：测评入围名单：米尔-STM32MP257开发板

个人信息无误，确认可以完成评测计划
2025-03-09
回复了主题帖：【EV1W0505B-Y-00A评测】隔离DC/DC选型?-看看MIE1W0505B

秦天qintian0303 发表于 2025-3-9 09:35 这个隔离高压有人测试吗？这个不知道怎么测试，非专业人士，也没有设备。不知道用打火机的打火器试试不知道可不可以
回复了主题帖：【EV1W0505B-Y-00A评测】隔离DC/DC选型?-看看MIE1W0505B

lemonboard 发表于 2025-3-9 10:19 隔离高压没有办法测试吧！难度有点大吧！这个不知道怎么测试，非专业人士，也没有设备。不知道用打火机的打火器试试不知道可不可以
回复了主题帖：【EV1W0505B-Y-00A评测】隔离DC/DC选型?-看看MIE1W0505B

PowerAnts 发表于 2025-3-9 10:19 十多年前我就预言，小功率转换器以后完全傻瓜化的，不管是什么应用，都是输入两个脚，输出两个脚。这一天应 ... 是的，集成度会越来越高，关注应用即可。