SunFounder Da Vinci Kit Bedienungsanleitung Seite 199

#include <wiringPi.h>
#include <stdio.h>
#define ROWS 4
#define COLS 4
#define BUTTON_NUM (ROWS * COLS)
KEYS[BUTTON_NUM] {
unsigned char
'1','2','3','A',
'4','5','6','B',
'7','8','9','C',
' * ','0','#','D'};
unsigned char rowPins[ROWS]
unsigned char colPins[COLS]
void keyRead(unsigned char
bool keyCompare(unsigned char
void keyCopy(unsigned char
void keyPrint(unsigned char
void keyClear(unsigned char
int keyIndexOf(const
void init(void) {
for(int i=0 ; i<4
pinMode(rowPins[i], OUTPUT);
pinMode(colPins[i], INPUT);
}
}
int main(void){
unsigned char pressed_keys[BUTTON_NUM];
unsigned char last_key_pressed[BUTTON_NUM];
if(wiringPiSetup()
printf("setup wiringPi failed
return 1;
}
init();
while(1){
keyRead(pressed_keys);
bool comp =
if (!comp){
keyPrint(pressed_keys);
keyCopy(last_key_pressed, pressed_keys);
}
delay(100);
}
return 0;
}
void keyRead(unsigned char
int index;
int count = 0;
keyClear(result);
for(int i=0 ; i<ROWS ;
digitalWrite(rowPins[i], HIGH);
1.8. 2 Eingabe
= {1, 4, 5, 6};
= {12, 3, 2, 0};
result);
*
a, unsigned char
*
a, unsigned char
*
a);
*
a);
*
char value);
; i++) {
== -1){ //when initialize wiring failed,print message to screen
!");
keyCompare(pressed_keys, last_key_pressed);
result){
*
i++ ){
b);
*
b);
*
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