47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
#include <Keypad.h>
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const byte ROWS = 4; //four rows
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const byte COLS = 3; //three columns
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char keys[ROWS][COLS] = {
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{'1','2','3'},
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{'4','5','6'},
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{'7','8','9'},
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{'*','0','#'}
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};
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byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
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byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad
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Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
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unsigned long loopCount = 0;
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unsigned long timer_t = 0;
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void setup(){
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Serial.begin(9600);
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// Try playing with different debounceTime settings to see how it affects
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// the number of times per second your loop will run. The library prevents
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// setting it to anything below 1 millisecond.
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kpd.setDebounceTime(10); // setDebounceTime(mS)
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}
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void loop(){
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char key = kpd.getKey();
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// Report the number of times through the loop in 1 second. This will give
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// you a relative idea of just how much the debounceTime has changed the
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// speed of your code. If you set a high debounceTime your loopCount will
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// look good but your keypresses will start to feel sluggish.
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if ((millis() - timer_t) > 1000) {
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Serial.print("Your loop code ran ");
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Serial.print(loopCount);
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Serial.println(" times over the last second");
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loopCount = 0;
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timer_t = millis();
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}
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loopCount++;
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if(key)
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Serial.println(key);
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}
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