mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
66 lines
1.2 KiB
Arduino
66 lines
1.2 KiB
Arduino
|
//
|
||
|
|
// FILE: I2Ckeypad_demo01.ino
|
||
|
|
// AUTHOR: Rob Tillaart
|
||
|
|
// VERSION: 0.1.0
|
||
|
|
// PURPOSE: demo
|
||
|
|
// URL: https://github.com/RobTillaart/I2CKeyPad
|
||
|
|
//
|
||
|
|
// HISTORY:
|
||
|
|
// 2019-10-01 0.0.1 initial version
|
||
|
|
// 2020-06-26 0.1.0 updated with lib
|
||
|
|
|
||
|
|
// PCF8574
|
||
|
|
// pin p0-p3 rows
|
||
|
|
// pin p4-p7 colums
|
||
|
|
// 4x4 or smaller keypad.
|
||
|
|
|
||
|
|
#include "Wire.h"
|
||
|
|
#include "I2CKeyPad.h"
|
||
|
|
|
||
|
|
const uint8_t KEYPAD_ADDRESS = 0x38;
|
||
|
|
|
||
|
|
I2CKeyPad keyPad;
|
||
|
|
|
||
|
|
uint32_t start, stop;
|
||
|
|
uint32_t lastKeyPressed = 0;
|
||
|
|
|
||
|
|
void setup()
|
||
|
|
{
|
||
|
|
Serial.begin(115200);
|
||
|
|
Serial.println(__FILE__);
|
||
|
|
|
||
|
|
Wire.begin();
|
||
|
|
Wire.setClock(400000);
|
||
|
|
if (keyPad.begin(KEYPAD_ADDRESS) == false)
|
||
|
|
{
|
||
|
|
Serial.println("\nERROR: cannot communicate to keypad.\nPlease reboot.\n");
|
||
|
|
while(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void loop()
|
||
|
|
{
|
||
|
|
uint32_t now = millis();
|
||
|
|
char keys[] = "123A456B789C*0#DNF"; // N = Nokey, F = Fail
|
||
|
|
|
||
|
|
if (now - lastKeyPressed >= 100)
|
||
|
|
{
|
||
|
|
lastKeyPressed = now;
|
||
|
|
|
||
|
|
start = micros();
|
||
|
|
uint8_t idx = keyPad.getKey();
|
||
|
|
stop = micros();
|
||
|
|
|
||
|
|
Serial.print(millis());
|
||
|
|
Serial.print("\t");
|
||
|
|
Serial.print(idx);
|
||
|
|
Serial.print("\t");
|
||
|
|
Serial.print(keys[idx]);
|
||
|
|
Serial.print("\t");
|
||
|
|
Serial.println(stop - start);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// -- END OF FILE --
|