lab2-3-2.c
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#include <wiringPi.h>
const int LedRed[8] = { 4, 17, 18, 27, 22, 23, 24, 25 };
const int Keypad[5] = { 6, 12, 13, 16, 19 };
int state=0;
void checkKey3(){
if(KeypadRead()==2)
state=0;
}
int KeypadRead() {
int i, keypadnum=-1;
for(i=0; i<8; i++) {
if(!digitalRead(Keypad[i])) {
keypadnum = i;
break;
}
}
return keypadnum;
}
void LedControl(int num) {
int i;
for(i=0; i<8; i++) {
checkKey3();
if(state==0)
return;
if(i==num)
digitalWrite(LedRed[i], HIGH);
else
digitalWrite(LedRed[i], LOW);
}
}
void LedON(int order){
int i;
if(order==1){
for(i=0; i<8; i++) {
LedControl(i);
if(state==0)
return;
delay(500);
}
LedControl(-1);
}
else if (order==-1){
for(i=7; i>=0; i--) {
LedControl(i);
if(state==0)
return;
delay(500);
}
LedControl(-1);
}
}
int main(void) {
int i, keypadnum=-1;
if(wiringPiSetupGpio() == -1)
return 1;
for(i=0; i<8; i++) {
pinMode(LedRed[i], OUTPUT);
digitalWrite(LedRed[i], LOW);
}
for(i=0; i<5; i++)
pinMode(Keypad[i], INPUT);
while(1) {
state=0;
keypadnum = KeypadRead();
if(keypadnum== 3) {
state=1;
LedON(1);
}
else if(keypadnum== 4) {
state=1;
LedON(-1);
}
else if(keypadnum== 0){
while(1){
state=1;
LedON(1);
if(state==0)
break;
}
}
else if(keypadnum== 1){
while(1){
state=1;
LedON(-1);
if(state==0)
break;
}
}
}
return 0;
}