原创 PIC16F877的SPI74HC595显示程序

#include<pic.h>

static volatile int table[20]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xd8,0x80,
                               0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x7f,0xbf,0x89,0xff};
volatile unsigned char data;
#define PORTAIT(adr,bit)   ((unsigned)(&adr)*8+(bit))

static bit LOCK @ PORTAIT(PORTA,5);

void SPIINT()
{
 PIR1=0;
 SSPCON=0X30;
 SSPSTAT=0XC0;
 TRISC=0X00;
}

void initial()
{
 TRISA=0X00;
 INTCON=0X00;
 LOCK=0;
}

void SPILED(int data)
{
 SSPBUF=data;
 do
 {;}
 while(SSPIF==0);
 SSPIF=0;
}

void main()
{
 unsigned int i;
 initial();
 SPIINT();
 for(i=5;i>0;i--)
 {
  data=table;
  SPILED(data);
 }
 LOCK=1;
}