tonxin3.c

单片机与pc际之间的通信

#include<c8051f020.h>
#include<function.h>
#define LED_PORT P5
#define SYSCLK 2000000
unsigned char ch; 

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=ch;
        while(!TI0);
	    TI0 = 0;
        //LED_PORT = buff[n];
	    //for(k=0;k<100000;k++);
	   //}
    // n=0;
	
}
void send_string_com(void) 

      { 
         unsigned int k= 0 ; 
         unsigned char* str="my word is beautiful,it is full of happiness and delicious food!";
		 int length;
		 length=get_str_length(str);
         do 
         { 
          ch=*(str + k);
		  UartOut(); 
          k++; 
         } while (k < length); 
      }




void main(void)
{
 unsigned char mid;
 
 Init_Device();

 while(1)
	{
	    while (RI0==0);
		mid=SBUF0;
		RI0=0;
		if(mid=='a') send_string_com();
        // n++;
        //if(n>=8) n=0;
    }

}