单片机SPI模块+74LS164驱动数码管

#include
#ifndef _XTAL_FREQ
#define _XTAL_FREQ 4000000
#endif
const unsigned char seg_comAnode[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f};//共阳
const unsigned char seg_comCathode[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,
0x87,0xff,0xef}; //共阴
/*同时发送和接收一个字节,74LS164吸电流大于拉电流，数码管接成上拉形式*/
unsigned char BUFF;
void init(){
TRISC=0B11010111;/*RC4/SDI引脚为输出，RC5/SDO引脚为输出，从模式RC3/SCK引脚为输入*/
SSPSTAT=0b00000000;/* 在结束时采样，在上升沿数据移位*/
SSPCON=0b00110010;/* SSPEN=1；CKP=1 ， FOSC/64，*/
TRISD=0X00;
PORTD=0;
}
void In_74LS164(unsigned char datas){
SSPBUF=datas;
do
{
;
}while(SSPIF==0);/*等待发送完毕*/
SSPIF=0;/*清除SSPIF标志*/
//BUFF=SSPBUF;/*腾空缓冲器*/
}
void main()
{unsigned char b,a,i,s=0;unsigned char m=0x01;
init();
while(1){

for(i=0;i<4;i++)
{
PORTD=~(m
for(s=0;s<9;s++){

In_74LS164( seg_comCathode[s]);
__delay_ms(100);__delay_ms(100);
}
}

for(i=1,a=m<4;i<4;i++)
{
PORTD=~(a>>i);

for(s=0;s<9;s++){

In_74LS164( seg_comCathode[s]);
__delay_ms(100);__delay_ms(100);
}
}
}
}