SPI通信方式点亮2位7段数码管应用例程

#include<reg52.h> #define uchar unsigned char uchar num; sbit DS=P1^3; sbit OE=P1^0; sbit STCP=P1^4; sbit SHCP=P1^2; sbit MR=P1^1; void delay(uchar); uchar code table[]={ 0xc0,0xf9,0xa4,0xb0, 0x99,0x92,0x82,0xf8, 0x80,0x90,0x88,0x83, 0xc6,0xa1,0x86,0x8e}; void init() { DS=0; STCP=0; SHCP=0; OE=0; MR=1; } void write_byte(uchar date) { uchar i,temp; temp=date; for(i=0;i<8;i++) { temp=temp<<1; DS=CY; SHCP=1; SHCP=0; } } void delay(uchar x) { uchar a,b; for(a=x;a>0;a--) for(b=100;b>0;b--); } void main() { init(); while(1) { for(num=0;num<16;num++) { write_byte(table[num]);//十位 write_byte(table[num]);//个位 STCP=1; STCP=0; delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); delay(6000); } } }