at91sam9261 linux_at91sam9g45_at91sam9260资料(2)

mode &= 0xfffffff0;

mode |= ATMEL_US_USMODE_RS485; // in drivers/serial/atmel_serial.h

}

将上面的代码插在UART_PUT_MR(port, mode)之前即可

下面是从外国的一个论坛上找到的：关于uart配置成rs485模式的

to change each USART in RS-485 mode, add this line in linux/drivers/serial/atmel_serial.c , in function atmel_set_termios ,

just before the instruction "UART_PUT_MR(port, mode) ;" that configures the USART mode.

mode |= ATMEL_US_USMODE_RS485; //Take effect for all USART that you configure

or if you want filter for a specific USART, i used the dedicated IRQ number :

if (port->irq == AT91SAM9260_ID_US2) // USART2 is a rs485

{

mode |= ATMEL_US_USMODE_RS485;

}

I don't know if it's the best solution but it works very well.

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