btclock_v3/src/lib/button_handler.cpp

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#include "button_handler.hpp"
TaskHandle_t buttonTaskHandle = NULL;
const TickType_t debounceDelay = pdMS_TO_TICKS(50);
TickType_t lastDebounceTime = 0;
void buttonTask(void *parameter)
{
while (1)
{
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
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std::lock_guard<std::mutex> lock(mcpMutex);
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TickType_t currentTime = xTaskGetTickCount();
if ((currentTime - lastDebounceTime) >= debounceDelay)
{
lastDebounceTime = currentTime;
if (!digitalRead(MCP_INT_PIN))
{
uint pin = mcp1.getLastInterruptPin();
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switch (pin)
{
case 3:
toggleTimerActive();
break;
case 2:
nextScreen();
break;
case 1:
previousScreen();
break;
case 0:
showSystemStatusScreen();
break;
}
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}
mcp1.clearInterrupts();
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}
else
{
}
// Very ugly, but for some reason this is necessary
while (!digitalRead(MCP_INT_PIN))
{
mcp1.clearInterrupts();
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}
}
}
void IRAM_ATTR handleButtonInterrupt()
{
BaseType_t xHigherPriorityTaskWoken = pdFALSE;
xTaskNotifyFromISR(buttonTaskHandle, 0, eNoAction, &xHigherPriorityTaskWoken);
if (xHigherPriorityTaskWoken == pdTRUE)
{
portYIELD_FROM_ISR();
}
}
void setupButtonTask()
{
xTaskCreate(buttonTask, "ButtonTask", 4096, NULL, tskIDLE_PRIORITY, &buttonTaskHandle); // Create the FreeRTOS task
// Use interrupt instead of task
attachInterrupt(MCP_INT_PIN, handleButtonInterrupt, CHANGE);
}