save01.txt

单片机与pc际之间的通信

#include<c8051f020.h>
#define LED_PORT P5
#define SYSCLK 2000000


void Timer_Init()
{
    CKCON     = 0x10;
    TMOD      = 0x20;
    TH1       = 0xF9;
     TR1 = 1;
    TI0 = 1;
}
void UART_Init()
{
    SCON0     = 0x50;
}
void Port_IO_Init()
{

    XBR0      = 0x04;
    XBR2      = 0x40;
}
void Reset_Sources_Init()
{
    RSTSRC    = 0x41;
}
void Init_Device(void)
{
    //LED_PORT = 0xAA;
    Timer_Init();
    UART_Init();
    Port_IO_Init();
	Reset_Sources_Init();

}
void UartOut(void)//发送
{
	
	    int n;
        //double k;
        unsigned char buff[]={'I','L','O','V','E','Y','O','U','!'};
	 for(n=0;n<=8;n++)
	   {
		SBUF0=buff[n];
        while(!TI0);
	    TI0 = 0;
        //LED_PORT = buff[n];
	    //for(k=0;k<100000;k++);
	   }
     n=0;
	
}




void main(void)
{
 unsigned char mid;
 Init_Device();
 while(1)
	{
	    while (RI0==0);
		mid=SBUF0;
		RI0=0;
		if(mid=='a') UartOut();
        // n++;
        //if(n>=8) n=0;
    }

}