ubuntu20.4系统安装CH340驱动并使用串口调试助手

Posted 2022-02-02 疯狂程序

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一、安装CH340驱动

1.查看ubuntu系统自带的驱动

jiki@jiki-M15X:~$ ls /lib/modules/$(uname -r)/kernel/drivers/usb/serial
aircable.ko   cypress_m8.ko       garmin_gps.ko   iuu_phoenix.ko  metro-usb.ko  opticon.ko   quatech2.ko      ti_usb_3410_5052.ko   visor.ko
ark3116.ko    digi_acceleport.ko  io_edgeport.ko  keyspan.ko      mos7720.ko    option.ko    safe_serial.ko   upd78f0730.ko         whiteheat.ko
belkin_sa.ko  empeg.ko            io_ti.ko        keyspan_pda.ko  mos7840.ko    oti6858.ko   sierra.ko        usb_debug.ko          wishbone-serial.ko
ch341.ko      f81232.ko           ipaq.ko         kl5kusb105.ko   mxuport.ko    pl2303.ko    spcp8x5.ko       usbserial.ko          xsens_mt.ko
cp210x.ko     f81534.ko           ipw.ko          kobil_sct.ko    navman.ko     qcaux.ko     ssu100.ko        usb-serial-simple.ko
cyberjack.ko  ftdi_sio.ko         ir-usb.ko       mct_u232.ko     omninet.ko    qcserial.ko  symbolserial.ko  usb_wwan.ko

可以看到含有ch341.ko文件，系统自带的版本比较老，删除掉：

jiki@jiki-M15X:~$ cd /lib/modules/$(uname -r)/kernel/drivers/usb/serial
sudo rm -rf ch341.ko

2.下载驱动

链接：http://www.wch.cn/download/CH341SER_LINUX_ZIP.html

解压后得到以下3个文件：

3.查询操作系统的发行编号

命令：uname -r

打开：https://elixir.bootlin.com/linux/v5.8/source/drivers/usb/serial/ch341.c

根据查询到的操作系统的发行编号，打开对应的版本，复制所有内容替换ch34x.c内容。

4.编译源程序

cd切换至下载的文件夹，make编译源码，生成ch34x.ko文件：

jiki@jiki-M15X:/lib/modules/5.8.0-55-generic/kernel/drivers/usb/serial$ cd /home/jiki/Downloads/CH341SER_LINUX
jiki@jiki-M15X:~/Downloads/CH341SER_LINUX$ make
make -C /lib/modules/5.8.0-55-generic/build  M=/home/jiki/Downloads/CH341SER_LINUX  
make[1]: 进入目录“/usr/src/linux-headers-5.8.0-55-generic”
  AR      /home/jiki/Downloads/CH341SER_LINUX/built-in.a
  CC [M]  /home/jiki/Downloads/CH341SER_LINUX/ch34x.o
  MODPOST /home/jiki/Downloads/CH341SER_LINUX/Module.symvers
  CC [M]  /home/jiki/Downloads/CH341SER_LINUX/ch34x.mod.o
  LD [M]  /home/jiki/Downloads/CH341SER_LINUX/ch34x.ko
make[1]: 离开目录“/usr/src/linux-headers-5.8.0-55-generic”

注：编译需要安装gcc与make。

5.复制ch34x.ko文件

复制ch34x.ko文件至系统默认驱动文件夹：sudo cp ch34x.ko /lib/modules/$(uname -r)/kernel/drivers/usb/serial

jiki@jiki-M15X:~/Downloads/CH341SER_LINUX$ sudo cp ch34x.ko /lib/modules/$(uname -r)/kernel/drivers/usb/serial
[sudo] jiki 的密码： 
jiki@jiki-M15X:~/Downloads/CH341SER_LINUX$ ls /lib/modules/$(uname -r)/kernel/drivers/usb/serial
aircable.ko   cypress_m8.ko       garmin_gps.ko   iuu_phoenix.ko  metro-usb.ko  opticon.ko   quatech2.ko      ti_usb_3410_5052.ko   visor.ko
ark3116.ko    digi_acceleport.ko  io_edgeport.ko  keyspan.ko      mos7720.ko    option.ko    safe_serial.ko   upd78f0730.ko         whiteheat.ko
belkin_sa.ko  empeg.ko            io_ti.ko        keyspan_pda.ko  mos7840.ko    oti6858.ko   sierra.ko        usb_debug.ko          wishbone-serial.ko
ch34x.ko      f81232.ko           ipaq.ko         kl5kusb105.ko   mxuport.ko    pl2303.ko    spcp8x5.ko       usbserial.ko          xsens_mt.ko
cp210x.ko     f81534.ko           ipw.ko          kobil_sct.ko    navman.ko     qcaux.ko     ssu100.ko        usb-serial-simple.ko
cyberjack.ko  ftdi_sio.ko         ir-usb.ko       mct_u232.ko     omninet.ko    qcserial.ko  symbolserial.ko  usb_wwan.ko

输入lsmod命令查看：

iki@jiki-M15X:~/Downloads/CH341SER_LINUX$ lsmod
Module                  Size  Used by
ch34x                  24576  0
usbserial              53248  1 ch34x
nls_iso8859_1          16384  2
nvidia_uvm           1019904  0
nvidia_drm             57344  13
nvidia_modeset       1228800  10 nvidia_drm

看到ch34x模块，至此ch34驱动安装完成，如果未看到，输入sudo depmod -a命令，重启一次电脑。