CH340系列Linux驱动安装

CH340系列Linux驱动安装

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如需转载请标明出处：http://blog.csdn.net/itas109
技术交流：129518033

环境：

系统：Ubuntu 20.04
linux内核版本：5.15.0
CH340版本：CH340G
CH340 linux驱动版本：1.5 (2018-03-18)
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前言

CH340系列USB转串口芯片是南京沁恒微电子股份有限公司的一款国产芯片，其价格和稳定性都非常不错。其驱动也支持windows、linux、macos和android等系统。

1. 下载驱动

https://www.wch.cn/download/CH341SER_LINUX_ZIP.html

CH340系列USB转串口LINUX驱动程序，支持CH340G，CH340T，CH340C，CH340N, CH340K, CH340E，CH340B，CH341A，CH341F, CH341T，CH341B，CH341C，CH341U等。

2. 编译CH340驱动源码

2.1 修改源码

• 头文件增加#include
• 注释掉591行// wait_queue_t wait;
• 修改938行ch34x_write_room函数返回值为unsigned int
• 修改964行ch34x_chars_in_buffer函数返回值为unsigned int

---
 ch34x.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ch34x.c b/ch34x.c
index 2fcf7f0..95d8acf 100644
--- a/ch34x.c
+++ b/ch34x.c
@@ -30,7 +30,7 @@
 //#include 
 #include 
 #include 
-
+#include 
 #define DRIVER_DESC		"WCH CH34x USB to serial adaptor driver"
 #define DRIVER_AUTHOR	""
 
@@ -588,7 +588,7 @@ static void ch34x_close( struct usb_serial_port *port,
 	unsigned int c_cflag;
 	int bps;
 	long timeout;
-	wait_queue_t wait;
+	// wait_queue_t wait;
 
 #if(LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0))
 	dbg_ch34x("%s - port:%d", __func__, port->number);
@@ -935,7 +935,7 @@ static int ch34x_write( struct usb_serial_port *port,
 }
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
-static int ch34x_write_room( struct tty_struct *tty )
+static unsigned int ch34x_write_room( struct tty_struct *tty )
 {
 	struct usb_serial_port *port = tty->driver_data;
 #else
@@ -961,7 +961,7 @@ static int ch34x_write_room( struct usb_serial_port *port )
 }
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27))
-static int ch34x_chars_in_buffer( struct tty_struct *tty )
+static unsigned int ch34x_chars_in_buffer( struct tty_struct *tty )
 {
 	struct usb_serial_port *port = tty->driver_data;
 #else
-- 
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2.2 编译

$ make
make -C /lib/modules/5.15.0-52-generic/build  M=/home/dev/CH341SER_LINUX  
make[1]: 进入目录“/usr/src/linux-headers-5.15.0-52-generic”
  CC [M]  /home/dev/CH341SER_LINUX/ch34x.o
  MODPOST /home/dev/CH341SER_LINUX/Module.symvers
  CC [M]  /home/dev/CH341SER_LINUX/ch34x.mod.o
  LD [M]  /home/dev/CH341SER_LINUX/ch34x.ko
  BTF [M] /home/dev/CH341SER_LINUX/ch34x.ko
Skipping BTF generation for /home/dev/CH341SER_LINUX/ch34x.ko due to unavailability of vmlinux
make[1]: 离开目录“/usr/src/linux-headers-5.15.0-52-generic”

$ ls
ch34x.c   ch34x.mod    ch34x.mod.o  Makefile       Module.symvers
ch34x.ko  ch34x.mod.c  ch34x.o      modules.order  readme.txt
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2.3 安装

sudo make load
sudo cp ch34x.ko /lib/modules/`uname -r`/kernel/drivers/usb/serial
sudo depmod
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2.4 查看usb设备

$ lsusb 
Bus 002 Device 008: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
...
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3. 使用CSerialPort进行回环测试

$ ./CSerialPortDemoNoGui 
Version: https://github.com/itas109/CSerialPort - V4.2.1.221107

availableFriendlyPorts: 
1 - /dev/ttyUSB0 
2 - /dev/ttyS0  

Please Input The Index Of Port(1 - 2)
1
Port Name: /dev/ttyUSB0
Open /dev/ttyUSB0 Success
/dev/ttyUSB0 - Count: 1, Length: 12, Str: 12345itas109, Hex: 0x31 0x32 0x33 0x34 0x35 0x69 0x74 0x61 0x73 0x31 0x30 0x39
/dev/ttyUSB0 - Count: 2, Length: 12, Str: 12345itas109, Hex: 0x31 0x32 0x33 0x34 0x35 0x69 0x74 0x61 0x73 0x31 0x30 0x39 
/dev/ttyUSB0 - Count: 3, Length: 12, Str: 12345itas109, Hex: 0x31 0x32 0x33 0x34 0x35 0x69 0x74 0x61 0x73 0x31 0x30 0x39
...
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License

License under CC BY-NC-ND 4.0: 署名-非商业使用-禁止演绎

如需转载请标明出处：http://blog.csdn.net/itas109
技术交流：129518033

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Reference:

1.https://www.wch.cn/product/CH340.html