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buttons.c
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buttons.c
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//
// menu.c
// cxg-60ewt
//
// Created by Leonid Mesentsev on 26/11/2019.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#include <buttons.h>
#include <stm8s.h>
#include <stm8s_pins.h>
#include <delay.h>
#include <clock.h>
#include <string.h>
#define DEBOUNCE_TIME 10
#define MULTICLICK_TIME 180
#define SHORT_PRESS 300
#define LONG_PRESS 900
#define FAST_INCREMENT 40
uint8_t checkButton(struct Button *btn, int16_t *value, int8_t increment, uint32_t nowTime)
{
static uint8_t skipCounter = 0;
if (getPin(btn->pin) == LOW)
{
if (!btn->lastBounceTime)
btn->lastBounceTime = nowTime;
if (!btn->longPressTimer)
btn->longPressTimer = btn->lastBounceTime;
if ((nowTime - btn->longPressTimer) > LONG_PRESS)
{
if (!(skipCounter++ % FAST_INCREMENT))
{
*value += increment;
}
}
else if ((nowTime - btn->lastBounceTime) > SHORT_PRESS)
{
*value += increment;
btn->lastBounceTime = 0;
beep();
}
if (nowTime - btn->lastBounceTime > DEBOUNCE_TIME)
{
return HIGH;
}
}
else
{
btn->lastBounceTime = 0;
btn->longPressTimer = 0;
}
return LOW;
}
uint8_t checkDoubleClick(struct Button *btn, int16_t *value, int8_t increment, uint32_t nowTime)
{
uint8_t clicks = 0;
uint8_t btnState = getPin(btn->pin);
// Make the button logic active-high in code
btnState = !btnState;
// If the switch changed, due to noise or a button press, reset the debounce timer
if (btnState != btn->lastState)
{
btn->lastBounceTime = nowTime;
}
// Debounce the button (check if a stable, changed state has occured)
if (nowTime - btn->lastBounceTime > DEBOUNCE_TIME && btnState != btn->depressed)
{
btn->depressed = btnState;
if (!btn->depressed)
btn->clickCount++;
}
btn->lastState = btnState;
// If the button released state is stable, report number of clicks and start new cycle
if (btn->depressed && (nowTime - btn->lastBounceTime) > MULTICLICK_TIME)
{
// positive count for released buttons
clicks = btn->clickCount;
btn->clickCount = 0;
if (clicks > 1)
{
*value += increment;
beep();
return HIGH;
}
}
return LOW;
}