send.c

PIC16F873模拟的SPI发送程序

#include <pic.h>
void  spiinit();
//void delay(unsigned int x);
void interrupt spi();


main()
{   
    if(RA5==0)
    {
      spiinit();
      GIE=1;
      PEIE=1;
      while(1)
      {
        ;
        //delay(200);
      }
    }
}



void  spiinit()
{
  RP0=1;
  TRISC=0x18;
  SSPSTAT=0X00;
  TRISD=0X00;
  TRISE=0X00;
  ADCON1=0X06;
  TRISA=0XF0;
  SSPIE=1;

  RP1=0;
  SSPCON=0X34;
  PORTD=0X00;
  SSPIF=0;
}
  

//void delay(unsigned int x)
 //{
  // unsigned int a,b;
  // for(a=x;a>0;a--)
    // for(b=200;b>0;b--);
// }
 
void interrupt spi()
{
   SSPIF=0;
   PORTD=SSPBUF;
}