mirror of
https://github.com/RobTillaart/Arduino.git
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65 lines
1.1 KiB
C++
65 lines
1.1 KiB
C++
//
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// FILE: I2Ckeypad_demo01.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo
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// URL: https://github.com/RobTillaart/I2CKeyPad
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//
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// PCF8574
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// pin p0-p3 rows
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// pin p4-p7 columns
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// 4x4 or smaller keypad.
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#include "Wire.h"
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#include "I2CKeyPad.h"
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const uint8_t KEYPAD_ADDRESS = 0x38;
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I2CKeyPad keyPad(KEYPAD_ADDRESS);
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uint32_t start, stop;
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uint32_t lastKeyPressed = 0;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Wire.begin();
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Wire.setClock(400000);
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if (keyPad.begin() == false)
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{
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Serial.println("\nERROR: cannot communicate to keypad.\nPlease reboot.\n");
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while(1);
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}
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}
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void loop()
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{
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uint32_t now = millis();
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char keys[] = "123A456B789C*0#DNF"; // N = NoKey, F = Fail
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if (now - lastKeyPressed >= 100)
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{
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lastKeyPressed = now;
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start = micros();
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uint8_t index = keyPad.getKey();
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stop = micros();
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Serial.print(millis());
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Serial.print("\t");
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Serial.print(index);
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Serial.print("\t");
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Serial.print(keys[index]);
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Serial.print("\t");
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Serial.println(stop - start);
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}
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}
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// -- END OF FILE --
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