a

+#include <wiringPi.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+const int FndSelectPin[6] = { 4, 17, 18, 27, 22, 23 };
+const int FndPin[8] = { 6, 12, 13, 16, 19, 20, 26, 21 };
+const int FndFont[10] = { 0x3F, 0x06, 0x5B, 0x4F, 0x66,
+			  0x6D, 0x7D, 0x07, 0x7F, 0x67 };
+
+void init(){
+	int i;
+	if( wiringPiSetupGpio() == -1 ){
+		printf( "wiringPiSetupGpio() error\n" );
+		exit(-1);
+	}
+	for(i=0;i<6;i++){
+		pinMode( FndSelectPin[i], OUTPUT );
+		digitalWrite( FndSelectPin[i], HIGH );
+	}
+	for(i=0;i<8;i++){
+		pinMode( FndPin[i], OUTPUT );
+		digitalWrite( FndPin[i], LOW );
+	}
+}
+void FndSelect(int position){
+	int i;
+	for(i=0;i<6;i++){
+		if(i==position){
+			digitalWrite(FndSelectPin[i],LOW);
+		}
+		else{
+			digitalWrite(FndSelectPin[i],HIGH);
+		}
+	}
+}
+void FndDisplay(int position, int num){
+	int i,number;
+	int flag=0;
+	int shift=0x01;
+	number=FndFont[num];
+	if(position==2)
+		number|=0x80;
+
+	for(i=0;i<8;i++){
+		flag=(number&shift);
+		digitalWrite(FndPin[i], flag);
+		shift<<=1;
+	}
+	FndSelect(position);
+}
+int main(){
+	int pos;
+	int time=0;
+	init();
+	unsigned long prevtime=millis();
+	while(1){
+		unsigned long curtime=millis();
+		if(curtime-prevtime > 10){
+			prevtime=curtime;
+			time++;
+		}
+		int data[6]={time%10, (time%100)/10, (time%1000)/100,
+			(time/1000)%10, (time/10000)%10, time/100000};
+		for(pos=0;pos<6;pos++){
+			FndDisplay(pos,data[pos]);
+			delay(1);
+		}
+	}
+	return 0;
+}
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