uart.c

来自「ch375读U盘程序」· C语言 代码 · 共 26 行

//Code adapted from Ateml AVR Application Note AVR306

#include <avr/io.h>

//Initialize USART 115200bps at 8MHz
void InitUSART(void)
{
	UCSRB = 0x00;
	UCSRA = 0x02;
	UCSRC = 0x86;
	UBRRL = 0x08; //set baud rate lo
	UBRRH = 0x00; //set baud rate hi
	UCSRB = 0x18;
}

//Write function
void TransmitBytes(unsigned char *data)				
{
	while(*data != 0)
	{
		while(!( UCSRA & (1<<UDRE)) )					//	等待知道发送缓冲区空
			;
		UDR = *data++;										//	把数据放入发送缓冲区								//store new index
	}
}