*/ int (*request_port)(struct uart_port *); void (*config_port)(struct uart_port *, int); int (*verify_port)(struct uart_port *, struct serial_struct *); int (*ioctl)(struct uart_port *, unsigned int, unsigned long); #ifdef CONFIG_CONSOLE_POLL void (*poll_put_char)(struct ...
int (*request_port)(struct uart_port *); void (*config_port)(struct uart_port *, int); int (*verify_port)(struct uart_port *, struct serial_struct *); int (*ioctl)(struct uart_port *, unsigned int, unsigned long); #ifdef CONFIG_CONSOLE_POLL int (*poll_init)(struct uart_port ...
void uart_unregister_driver(struct uart_driver *drv)函数参数和返回值含义如下：drv：要注销的uart_driver。返回值：无。2、uart_port的添加与移除 uart_port表示一个具体的port，uart_port定义在include/linux/serial_core.h文件，内容如下(有省略)：示例代码63.1.2 uart_port结构体 117struct uart_port { ...
接着前面的终端控制台分析,接下来分析serial的驱动.在linux中,serial也对应着终端,通常被称为串口终端.在shell上,我们看到的/dev/ttyS*就是串口终端所对应的设备节点. 在分析具体的serial驱动之前.有必要先分析uart驱动架构.uart是Universal Asynchronous Receiver and Transmitter的缩写.翻译成中文即为”通用异步收发器...
86void(*config_port)(struct uart_port*,int); 87int(*verify_port)(struct uart_port*,struct serial_struct*); 88int(*ioctl)(struct uart_port*,unsignedint,unsignedlong); 89 #ifdef CONFIG_CONSOLE_POLL 90int(*poll_init)(struct uart_port*); 91void(*poll_put_char)(struct uart_port*,unsign...
但serial_8250.c中默认并未实现rs485_config函数,那我们自己实现,如下:1) 驱动层编写485配置函数 代码语言:javascript 复制 // add by xx@xx beginstaticintserial8250_rs485_config(struct uart_8250_port*up,struct serial_rs485*rs485){if(rs485->flags&SER_RS485_ENABLED){printk(KERN_INFO"uart %d set...
在Linux 中,用 uart_driver 结构体来描述串口,uart_driver 定义在 include/linux/serial_core.h 文件中,内容如下: 295 struct uart_driver { 296 struct module *owner; /* 模块所属者 */ 297 const char *driver_name; /* 驱动名字 */ 298 const char *dev_name; /* 设备名字 */ ...
Linux串口应用编程详解(Serial) 一、串口设备节点 二、访问串口 1. 打开串口 #include <stdio.h>/* Standard input/output definitions */ #include <string.h>/* String function definitions */ #include <unistd.h>/* UNIX standard function definitions */...
在分析具体的serial驱动之前.有必要先分析uart驱动架构.uart是Universal Asynchronous Receiver and Transmitter的缩写.翻译成中文即为”通用异步收发器”.它是串口设备驱动的封装层. 二:uart驱动架构概貌 如下图所示: 上图中红色部份标识即为uart部份的操作. ...
static void uart_start(struct tty_struct *tty) { struct uart_state *state = tty->driver_data; struct uart_port *port = state->port; unsigned long flags; spin_lock_irqsave(&port->lock, flags); __uart_start(tty); spin_unlock_irqrestore(&port->lock, flags); ...