ESP32_ChinaDieselHeater_Con.../Arduino/BTCDieselHeater/keypad.cpp

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2018-11-21 09:53:12 +00:00
#include <Arduino.h>
#include "keypad.h"
#include "pins.h"
/*
2018-11-21 09:53:12 +00:00
const unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers
void initKeyPad()
{
pinMode(keyLeft_pin, INPUT);
pinMode(keyRight_pin, INPUT);
pinMode(keyCentre_pin, INPUT);
pinMode(keyUp_pin, INPUT);
pinMode(keyDown_pin, INPUT);
}
uint8_t readKeys()
{
static uint8_t debouncedKey = 0;
static unsigned long lastDebounceTime = 0;
uint8_t newKey = 0;
if(digitalRead(keyLeft_pin) == LOW) newKey |= keyPress_Left;
if(digitalRead(keyRight_pin) == LOW) newKey |= keyPress_Right;
if(digitalRead(keyCentre_pin) == LOW) newKey |= keyPress_Centre;
if(digitalRead(keyUp_pin) == LOW) newKey |= keyPress_Up;
if(digitalRead(keyDown_pin) == LOW) newKey |= keyPress_Down;
static uint8_t prevKey = 0;
if(newKey != prevKey) {
lastDebounceTime = millis();
prevKey = newKey;
}
unsigned long elapsed = millis() - lastDebounceTime;
if (elapsed > debounceDelay) {
// whatever the reading is at, it's been there for longer than the debounce
// delay, so take it as the actual current state:
// Serial.println("debounce");
// if the button state has changed:
if (newKey != debouncedKey) {
debouncedKey = newKey;
}
}
return debouncedKey;
}
*/
CKeyPad::CKeyPad()
{
// pin scanning
_debouncedPins = 0;
_prevPins = 0;
_lastDebounceTime = millis();
_debounceDelay = 50;
// handler
_lastKey = 0;
_lastHoldTime = 0;
_holdTimeout = 0;
_keyCallback = NULL;
}
void
CKeyPad::init(int Lkey, int Rkey, int Ckey, int Ukey, int Dkey)
{
_pins[0] = Lkey;
_pins[1] = Rkey;
_pins[2] = Ckey;
_pins[3] = Ukey;
_pins[4] = Dkey;
for(int i=0; i<5; i++)
pinMode(_pins[i], INPUT);
}
uint8_t
CKeyPad::scanPins()
{
uint8_t newPins = 0;
if(digitalRead(_pins[0]) == LOW) newPins |= keyPress_Left;
if(digitalRead(_pins[1]) == LOW) newPins |= keyPress_Right;
if(digitalRead(_pins[2]) == LOW) newPins |= keyPress_Centre;
if(digitalRead(_pins[3]) == LOW) newPins |= keyPress_Up;
if(digitalRead(_pins[4]) == LOW) newPins |= keyPress_Down;
if(newPins != _prevPins) {
_lastDebounceTime = millis();
_prevPins = newPins;
}
unsigned long elapsed = millis() - _lastDebounceTime;
if (elapsed > _debounceDelay) {
// whatever the reading is at, it's been there for longer than the debounce
// delay, so take it as the actual current state:
_debouncedPins = newPins;
}
return _debouncedPins;
}
void
CKeyPad::setCallback(void (*callback)(uint8_t event))
{
_keyCallback = callback;
}
uint8_t
CKeyPad::update()
{
uint8_t newKey = scanPins();
// determine edge events
uint8_t keyChange = newKey ^ _lastKey;
uint8_t Press = keyChange & newKey; // bits set upon intial press, ONLY
uint8_t Release = keyChange & ~newKey; // bits set upon intial release, ONLY
uint8_t Repeat = 0;
_lastKey = newKey;
if(Press) {
#ifdef DBG_KEYPAD
DebugPort.println("PRESS");
#endif
_lastHoldTime = millis();
_holdTimeout = 350; // initial hold delay
}
if(Release) {
#ifdef DBG_KEYPAD
DebugPort.println("RELEASE");
#endif
_holdTimeout = 0; // cancel repeat
}
if(_holdTimeout && ((millis() - _lastHoldTime) > _holdTimeout)) {
#ifdef DBG_KEYPAD
DebugPort.println("REPEAT");
#endif
_holdTimeout = 150; // repeat delay
_lastHoldTime += _holdTimeout;
Repeat = newKey;
}
if(Press) {
if(_keyCallback != NULL)
_keyCallback(keyPressed | Press);
return keyPressed | Press;
}
if(Release) {
if(_keyCallback != NULL)
_keyCallback(keyReleased | Release);
return (keyReleased | Release);
}
if(Repeat) {
if(_keyCallback != NULL)
_keyCallback(keyRepeat | Repeat);
return (keyRepeat | Repeat);
}
return 0;
}