【中科蓝讯AB32VG1 RISC-V板“碰上”RTT测评】+LED与按键控制

xiyue521 发表于 2021-5-1 01:53

本帖最后由 xiyue521 于 2021-5-1 02:30 编辑

 

 

由原理图可以知道LED低电平亮，按键按下去低电平，配置按键上拉输入即可检测：

rt_pin_mode(S3, PIN_MODE_INPUT_PULLUP );



 

 

1.先封装底层函数，rt_pin_get获取引脚id值

                              rt_pin_mode，rt_pin_write，rt_pin_read这三个是按键模式，读，写函数，直接把获取到的id值传进去就可以修改对应的引脚。

 

 

 

<div aria-label="代码段小部件" contenteditable="false" role="region" tabindex="-1">
<pre data-widget="codesnippet">
<code class="language-cpp hljs">

void RGB_Init(void){
// 获得led成员
LED_R = rt_pin_get("PE.1");
LED_G = rt_pin_get("PE.4");
LED_B = rt_pin_get("PA.2");
// 设置引脚为输出方式
rt_pin_mode(LED_R, PIN_MODE_OUTPUT);
rt_pin_mode(LED_G, PIN_MODE_OUTPUT);
rt_pin_mode(LED_B, PIN_MODE_OUTPUT);
}
// on=1：红灯亮，on=0:全灭
void RGB_Red(rt_bool_t on){
if (on) {
 rt_pin_write(LED_R, PIN_LOW);
}else {
 rt_pin_write(LED_R, PIN_HIGH);
}
rt_pin_write(LED_G, PIN_HIGH);
rt_pin_write(LED_B, PIN_HIGH);
}

void RGB_Blue(rt_bool_t on){
if (on) {
 rt_pin_write(LED_B, PIN_LOW);
}else {
 rt_pin_write(LED_B, PIN_HIGH);
}
rt_pin_write(LED_G, PIN_HIGH);
rt_pin_write(LED_R, PIN_HIGH);
}

void RGB_Green(rt_bool_t on){
if (on) {
 rt_pin_write(LED_G, PIN_LOW);
}else {
 rt_pin_write(LED_G, PIN_HIGH);
}
rt_pin_write(LED_R, PIN_HIGH);
rt_pin_write(LED_B, PIN_HIGH);
}

void RGB_ALL(rt_bool_t on){
if (on) {
 rt_pin_write(LED_G, PIN_LOW);
 rt_pin_write(LED_R, PIN_LOW);
 rt_pin_write(LED_B, PIN_LOW);
}
else
{
 rt_pin_write(LED_G, PIN_HIGH);
 rt_pin_write(LED_R, PIN_HIGH);
 rt_pin_write(LED_B, PIN_HIGH);
}

}

void Key_Init(void){
S3= rt_pin_get("PF.0");
S2 = rt_pin_get("PF.1");
// 上拉输入
rt_pin_mode(S2, PIN_MODE_INPUT_PULLUP );
rt_pin_mode(S3, PIN_MODE_INPUT_PULLUP );
}

</code></pre>
<img src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" /><img height="15" role="presentation" src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" title="点击并拖拽以移动" width="15" /></div>

 

 

2.接下来创建一个led的任务，期间用到了全局变量mode，也可以用邮箱来传值。还有就是可以用INIT_APP_EXPORT（）函数来直接对函数初始化，不用再去main调用他。

<div aria-label="代码段小部件" contenteditable="false" role="region" tabindex="-1">
<pre data-widget="codesnippet">
<code class="language-cpp hljs">

static void rgb_thread_entry(void* pdata)
{
RGB_Init();
while(1)
{

 switch(mode)
 {

 case 0:
 RGB_ALL(0);
 rt_thread_mdelay(1000);
 RGB_ALL(1);
 rt_thread_mdelay(1000);
 break;
 case 1:

 rt_thread_mdelay(1000);
 RGB_Blue(1);
 rt_thread_mdelay(1000);
 RGB_Green(1);
 rt_thread_mdelay(1000);
 RGB_Red(1);
 break;

 }

}
}

static int Thread_RGB(void){
rt_thread_t thread = RT_NULL;
thread = rt_thread_create("rgb", rgb_thread_entry, RT_NULL, 512, 9, 10);
if(thread == RT_NULL)
{
 rt_kprintf("Thread_GRB Init ERROR");
 return RT_ERROR;
}
rt_thread_startup(thread);
}

INIT_APP_EXPORT(Thread_RGB); // 线程自动初始化
</code></pre>
<img src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" /><img height="15" role="presentation" src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" title="点击并拖拽以移动" width="15" /></div>

 

3.创建按键任务，这里用到了轮询的方式检测按键，100ms检测一次，检测到对应按键修改mode来切换不同的led闪烁模式。

    两个任务都是用动态创建的，格式也差不多，所以用RTOS其实可以简化很多东西。特别是RTTHREAD还有控制台，LOG的一些功能，调试的时候比较方便，极力推荐！

 

<div aria-label="代码段小部件" contenteditable="false" role="region" tabindex="-1">
<pre data-widget="codesnippet">
<code class="language-cpp hljs">

static void key_thread_entry(void *parameter){
Key_Init();
RGB_Init();
RGB_Red(1);
while(1){
 if (rt_pin_read(S2)==PIN_LOW) mode=0;

 if (rt_pin_read(S3)==PIN_LOW) mode=1;

 rt_thread_mdelay(100);
}
}

static int Key_Thread_Init(void){

rt_thread_t thread = RT_NULL;
thread = rt_thread_create("key_thread", key_thread_entry, RT_NULL, 512, 10, 10);
if(thread == RT_NULL)
{
 rt_kprintf("Thread_GRB Init ERROR");
 return RT_ERROR;
}
rt_thread_startup(thread);

}
INIT_APP_EXPORT(Key_Thread_Init);// 初始化线程
</code></pre>
<img src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" /><img height="15" role="presentation" src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" title="点击并拖拽以移动" width="15" /></div>

 

4.main函数就是没1s打印一次mode，其他没有了。

<div aria-label="代码段小部件" contenteditable="false" role="region" tabindex="-1">
<pre data-widget="codesnippet">
<code class="hljs">#include <rtthread.h>
#include "board.h"
uint8_t LED_R;
uint8_t LED_B;
uint8_t LED_G;
uint8_t S2;
uint8_t S3;
uint8_t mode ;
int main(void)
{

rt_kprintf("Hello, world\n");

while (1)
{
 rt_kprintf("mode:%d\r\n",mode);
 rt_thread_mdelay(1000); //空延时
};

return 0;
}
</code></pre>
<img src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" /><img height="15" role="presentation" src="data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==" title="点击并拖拽以移动" width="15" /></div>

 



5.输入ps可以查看线程信息，可以看见多了按键线程和led线程。



本文就到这里，下文介绍下定时器。

Jacktang 发表于 2021-5-1 17:51

看楼主用RTOS可以简化很多东西，调试确实是方便

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【中科蓝讯AB32VG1 RISC-V板“碰上”RTT测评】+LED与按键控制