最近迷上了Linux，入了一块板。电脑使用win7+ubuntu 双系统，可是调试的时候就麻烦了，ubuntu下写好sd卡镜像，调试的时候还要切换到win7，手上的usb转串口驱动芯片时CH340，于是就想看ubuntu下时候可以安装ch340驱动。
网上搜了一下，还真有，不过时很早的内容了。
因为属于小白，所以就摸着走呗...把ch340 一端插入电脑
输入命令： lsmod | grep usbserial
输出：usbserial 53248 1 ch341
成功发现了设备，识别出时 ch341 是我记错了？？
输入：lsusb
输出一下信息：
Bus 002 Device 003: ID 17ef:4810 Lenovo Integrated Webcam [R5U877]
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 002: ID 1a81:1004 Holtek Semiconductor, Inc.
Bus 006 Device 003: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
发现了ch341的一些相关信息
输入命令（查看USB转串口接入状态）：dmesg
输出相关信息，部分信息如下：
[ 429.184170] usb 6-1: new full-speed USB device number 3 using uhci_hcd
[ 429.345937] usb 6-1: New USB device found, idVendor=1a86, idProduct=7523
[ 429.345944] usb 6-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 429.345948] usb 6-1: Product: USB2.0-Ser!
[ 429.368123] usbcore: registered new interface driver usbserial
[ 429.368396] usbcore: registered new interface driver usbserial_generic
[ 429.368875] usbserial: USB Serial support registered for generic
[ 429.374125] usbcore: registered new interface driver ch341
[ 429.374143] usbserial: USB Serial support registered for ch341-uart
[ 429.374165] ch341 6-1:1.0: ch341-uart converter detected
[ 429.386851] usb 6-1: ch341-uart converter now attached to ttyUSB0
ID信息与lsusb检测到的一致，ch341-uart converter now attached to ttyUSB0 成功驱动，端口为ttyUSB0
太惊喜了。免的安装驱动了
下一步，安装串口终端软件，搜到了一个minicom，动手试试：
安装：sudo apt-get install minicom
打印一些信息，输入‘y’。
等待安装成功，然后用sudo minicom -s 设置minicom的端口对应到ttyUSB0（对应使用dmesg命令看到的信息）。
出现配置菜单：
选择“Serial port setup”，出现串口配置菜单：
输入A，修改serial device 由/Dev/tty0修改为/dev/ttyusb0，波特率等修改为115200 8N1。
硬件连接，上电，成功输出打印信息，呵呵
U-Boot SPL 2016.09-rc1 (Oct 01 2016 - 21:31:35)
init i2c
rand test 0 MB RW, err cnt = 0
DRAM: 512 MiB ~
CPU: 1008000000Hz, AXI/AHB/APB: 3/2/2
sunxi_board_init ok!
Trying to boot from MMC1
mmc_dev=0
common/spl/spl_mmc.c L138: mmc_initialize ok
common/spl/spl_mmc.c L155: find_mmc_device ok
part_init: try 'EFI': ret=-1
err=0
mmc_init: 0, time 268
common/spl/spl_mmc.c L298: mmc_init ok
common/spl/spl_mmc.c L335: goto mmc_load_image_raw_sector
hdr read sector 50, count=1
load_legacy
read 906 sectors to 49ffffc0
Jumping to U-Boot
SPL malloc() used 656 bytes (0 KB)
loaded - jumping to U-Boot...
image entry point: 0x
###in board_init_f
U-Boot 2016.09-rc1 (Oct 01 2016 - 21:31:35 +0800) Allwinner Technology
CPU: Allwinner A13 (SUN5I)
Model: Lichee A13
I2C: ready
DRAM: 512 MiB
###out board_init_f
###in board_init_r
MMC: part_init: try 'EFI': ret=-1
part_init: try 'DOS': ret=0
err=0
mmc_init: 0, time 276
*** Warning - bad CRC, using default environment
Setting up a 800x480 lcd console (overscan 0x0)
###set hbp=110, ht=1080, hspw=10
###set vbp=45, vt=527, vspw=10
.........
下一篇分享sd卡ubuntu下创建分区，boot/根文件等镜像烧录
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