原创 PIC16F877的SPI74HC595显示程序

#include



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;

}