mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
66 lines
1.1 KiB
C++
66 lines
1.1 KiB
C++
//
|
|
// FILE: I2Ckeypad_6x2.ino
|
|
// AUTHOR: Rob Tillaart
|
|
// PURPOSE: demo 6x2 or smaller keypad
|
|
// URL: https://github.com/RobTillaart/I2CKeyPad
|
|
//
|
|
// PCF8574
|
|
// pin p0-p5 rows
|
|
// pin p6-p7 columns
|
|
|
|
|
|
#include "Wire.h"
|
|
#include "I2CKeyPad.h"
|
|
|
|
const uint8_t KEYPAD_ADDRESS = 0x38;
|
|
|
|
I2CKeyPad keyPad(KEYPAD_ADDRESS);
|
|
|
|
uint32_t start, stop;
|
|
uint32_t lastKeyPressed = 0;
|
|
|
|
|
|
void setup()
|
|
{
|
|
Serial.begin(115200);
|
|
Serial.println(__FILE__);
|
|
|
|
Wire.begin();
|
|
Wire.setClock(400000);
|
|
if (keyPad.begin() == false)
|
|
{
|
|
Serial.println("\nERROR: cannot communicate to keypad.\nPlease reboot.\n");
|
|
while (1);
|
|
}
|
|
|
|
keyPad.setKeyPadMode(I2C_KEYPAD_6x2);
|
|
}
|
|
|
|
|
|
void loop()
|
|
{
|
|
uint32_t now = millis();
|
|
// adjust keymap if needed
|
|
char keys[] = "1234567890ABC NF"; // N = NoKey, F = Fail
|
|
|
|
if (now - lastKeyPressed >= 100)
|
|
{
|
|
lastKeyPressed = now;
|
|
|
|
start = micros();
|
|
uint8_t index = keyPad.getKey();
|
|
stop = micros();
|
|
|
|
Serial.print(millis());
|
|
Serial.print("\t");
|
|
Serial.print(index);
|
|
Serial.print("\t");
|
|
Serial.print(keys[index]);
|
|
Serial.print("\t");
|
|
Serial.println(stop - start);
|
|
}
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|