CH340 串口转换驱动，求帮助

bailongjuan 发表于 2022-8-7 18:29:28

项目有需要USB转RS485的需求。
插上去后lsusb显示为
root@firefly:~# lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 002: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

期望可以使用ttyUSB0

自己试图解决的方法
1、在这个系统上编译CH340驱动
①安装Linux头文件
②发现CH340官方驱动有问题报错，替换成了https://github.com/juliagoda/CH341SER
③仍然有报错
scripts/basic/fixdep: Exec format error难以解决，于是换方法

2、重新编固件
①参考官方文档，打开内核所有USBCAN选项
②保存配置文件到firefly_linux_defconfig
③加载Ubuntu的mk文件 ./build.sh roc-rk3566-pc-ubuntu.mk
④./build.sh
搞出来的固件仍然不能解决问题
增加了CONFIG_USB_SERIAL_CH341=y 也不行，甚至打包出来的固件文件和不加这一行的一样大（可能我还没有理解firefly的工程）

希望大佬帮忙，help

Liuth 发表于 2022-8-8 10:27:34

方法一应该是正确的方法，“CH340官方驱动有问题”，这个我感觉不太可能，你确定是官方的程序有bug？还是你编译过程操作不当？

Liuth 发表于 2022-8-9 15:48:01

只能自己编译驱动，如果编译出问题就根据报错信息解决

bailongjuan 发表于 2022-8-11 00:41:26

目前我的内核为4.19.232
但是官方文档里提供的驱动支持到3
Current Driver support versions of linux kernel range from 2.6.25 to 3.13.x

gcc版本为 gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0

编译日志如下
root@firefly:/home/firefly/CH341SER_LINUX# make
make -C /lib/modules/4.19.232/buildM=/home/firefly/CH341SER_LINUX
make: Entering directory '/usr/src/linux-headers-4.19.232'
CC /home/firefly/CH341SER_LINUX/ch34x.o
/home/firefly/CH341SER_LINUX/ch34x.c: In function 'ch34x_close':
/home/firefly/CH341SER_LINUX/ch34x.c:591:2: error: unknown type name 'wait_queue_t'; did you mean 'wait_event'?
591 |wait_queue_t wait;
   |^~~~~~~~~~~~
   |wait_event
/home/firefly/CH341SER_LINUX/ch34x.c:591:15: warning: unused variable 'wait' [-Wunused-variable]
error, forbidden warning:ch34x.c:591
591 |wait_queue_t wait;
   |             ^~~~
/home/firefly/CH341SER_LINUX/ch34x.c:590:7: warning: unused variable 'timeout' [-Wunused-variable]
error, forbidden warning:ch34x.c:590
590 |long timeout;
   |    ^~~~~~~
/home/firefly/CH341SER_LINUX/ch34x.c:589:6: warning: unused variable 'bps' [-Wunused-variable]
error, forbidden warning:ch34x.c:589
589 |int bps;
   |    ^~~
/home/firefly/CH341SER_LINUX/ch34x.c: In function 'wait_modem_info':
/home/firefly/CH341SER_LINUX/ch34x.c:797:7: error: implicit declaration of function 'signal_pending' [-Werror=implicit-function-declaration]
797 | if( signal_pending(current) )
   |    ^~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make: *** Error 1
make: *** Error 2
make: Leaving directory '/usr/src/linux-headers-4.19.232'
make: *** Error 2

请问能不能在Ubuntu20.04上使用CH340芯片进行USB到rs480转换唔

Liuth 发表于 2022-8-11 15:04:45

bailongjuan 发表于 2022-8-11 00:41
目前我的内核为4.19.232
但是官方文档里提供的驱动支持到3
Current Driver support versions of linux ke ...

模块是哪里买的？找商家要驱动

bailongjuan 发表于 2022-8-12 23:04:25

商家给的驱动也是这个驱动，来源是https://www.wch.cn/download/CH341SER_LINUX_ZIP.html
这个驱动可以是在linux中内置的，见https://elixir.bootlin.com/linux/v4.19.232/source/drivers/usb/serial/ch341.c
但是使用从linux源码来的这个文件编译后依然报错
root@firefly:/home/firefly/CH341SER_LINUX# make
make -C /lib/modules/4.19.232/buildM=/home/firefly/CH341SER_LINUX
make: Entering directory '/usr/src/linux-headers-4.19.232'
CC /home/firefly/CH341SER_LINUX/ch341.o
/bin/sh: 1: scripts/basic/fixdep: Exec format error
make: *** Error 2
make: *** Deleting file '/home/firefly/CH341SER_LINUX/ch341.o'
make: *** Error 2
make: Leaving directory '/usr/src/linux-headers-4.19.232'
make: *** Error 2
还是请firefly官方可以提供包含CH340驱动的ubuntu镜像

Liuth 发表于 2022-8-15 10:27:34

bailongjuan 发表于 2022-8-12 23:04
商家给的驱动也是这个驱动，来源是https://www.wch.cn/download/CH341SER_LINUX_ZIP.html
这个驱动可以是 ...

我编译好了啊，就是用的你给的商家驱动
都说了会报错就根据信息处理一下，说 unused variable ，那把没用的变量删除就行
然后 error: implicit declaration of function ‘signal_pending’百度一下就有了
https://blog.csdn.net/gehong3641/article/details/123149941

bailongjuan 发表于 2022-8-23 22:03:09

我根据你说的修改了后仍然报错无法解决，修改的文件见附件

root@firefly:/home/firefly/CH341SER_LINUX# make
make -C /lib/modules/4.19.232/buildM=/home/firefly/CH341SER_LINUX
make: Entering directory '/usr/src/linux-headers-4.19.232'
CC /home/firefly/CH341SER_LINUX/ch34x.o
/bin/sh: 1: scripts/basic/fixdep: Exec format error
make: *** Error 2
make: *** Deleting file '/home/firefly/CH341SER_LINUX/ch34x.o'
make: *** Error 2
make: Leaving directory '/usr/src/linux-headers-4.19.232'
make: *** Error 2
仍然求帮助

Liuth 发表于 2022-8-24 09:57:31

bailongjuan 发表于 2022-8-23 22:03
我根据你说的修改了后仍然报错无法解决，修改的文件见附件

root@firefly:/home/firefly/CH341SER_LINUX# ...

你这次看起来像没有正确装好linux-headers
你上次都能编译，这次还没开始就报错

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CH340 串口转换驱动，求帮助