uart1.c

来自「手把手教你单片机」· C语言 代码 · 共 36 行

#include <reg52.h>
typedef   unsigned char  uint8;
typedef   unsigned int   uint16;

uint8 num = 0;
void delay(uint16 n)
{
	while(n--);
}
void UART_init(void)
{
	SCON = 0x50;
	TMOD = 0x20;
	TH1  = 0xFD;
	TL1  = 0xFD;
	TR1  = 1;
	ES   = 1;
	EA   = 1;
}
void UART_send_byte(uint8 dat)
{
	SBUF = dat;
	while(!TI);
}
main()
{
	UART_init();
	while(1)
	{
		UART_send_byte(num);
		delay(20000);
	}
}