series.c

QH_MCU_V1.1单片机C源码. 内含实验程序 这是修改版.

#include <REG51.H>
#include <intrins.h>

#define uchar unsigned char 


uchar str[] = "http://www.allwisdom.net欢迎您\n";
uchar str1[] = "全惠电子感谢您的支持\n";

void uart_tx(uchar *p)
{
	int j=0;
	while(p[j])					// send string
	{
		TI=0;						// clear transmit interrupt flag
		SBUF=p[j];				// start sending one byte
		while (!TI);				// wait until sent
		j++;
	}

		TI = 0;
}

 void ISRSER() interrupt 4
 {
	    
       RI=0;
       if(SBUF!=0)
	      uart_tx(str);
	   else
          uart_tx(str1);
	   TI=0;


 }

void main()
{
    _nop_();
	_nop_();
	SCON|=0x50;  /* mode 1: 8-bit UART, enable receiver */ 
	TMOD|=0x20; /* timer 1 mode 2: 8-Bit reload */ 
	PCON|=0x80; // baud x2
	TH1=0xfd;   //串口初始化 0xfd=19200,0xfa=9600,0xf4=4800,0xe8=2400,0xd0=1200  
	TR1=1;
	EA=1;
	ES=1;  // Turn on Series Interrupte;

	while(1)
	{
	 ; 
	}
}