ESP32 Forum

Code: Select all

int btn_old = 0;
  int btn_now = 0;
  uint32_t btn_long_press_old = 0;
  // Flag marking if btn press a long press to preventing long press trigger a
  // short btn press event at the same time.
  int longPressFlag = false;
  while(1) {
    btn_now = gpio_get_level(BTN);
    if(btn_now != btn_old){
      if(btn_now == 1){ // btn pressed down
        ESP_LOGI(TAG, "BTN get pressed down.");
        btn_long_press_old = xTaskGetTickCount();
        longPressFlag = false;
      } else { // btn released
        ESP_LOGI(TAG, "BTN get released.");
        // When button get released in <1 second, do the gps coordinate snapshot
        if(abs(xTaskGetTickCount()-btn_long_press_old) < 1000/portTICK_PERIOD_MS
            && !longPressFlag)
        {
          ESP_LOGI(TAG, "Triggered a snapshot");
          snapshot_handler();
        }
      }
      btn_old = btn_now;
      btn_long_press_old = xTaskGetTickCount();
    }
    else if(btn_now == 1) { // Check if this is a long press btn event
      // When the button get released after more then 1 second, then go to the next display mode.
      if(abs(xTaskGetTickCount()-btn_long_press_old) > 1000/portTICK_PERIOD_MS){
        ESP_LOGI(TAG, "long btn press get triggered");
        mode_switch_handler();
        btn_long_press_old=xTaskGetTickCount(); // Update timer preparing trigger the next long btn press event
        longPressFlag = true;
      }
    }
    else {
//      ESP_LOGI(TAG, "Button stays unpressed.");
    }
    vTaskDelay(100 / portTICK_PERIOD_MS);
  }

Code: Select all

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"

static const char *TAG = "BTN";

#define	BUTTON	GPIO_NUM_22 

#define LONG_PRESS_IN_SECONDS 1

static void buttonScanTask(void* arg)
{
	uint16_t ticks = 0;

	ESP_LOGI(TAG, "Waiting For Press.");
	
	for (;;) 
	{

		// Wait here to detect press
		while( gpio_get_level(BUTTON) )
		{
			vTaskDelay(125 / portTICK_PERIOD_MS);
		}
		
		// Debounce
		vTaskDelay(50 / portTICK_PERIOD_MS);

		// Re-Read Button State After Debounce
		if (!gpio_get_level(BUTTON)) 
		{
			ESP_LOGI(TAG, "BTN Pressed Down.");
			
			ticks = 0;
		
			// Loop here while pressed until user lets go, or longer that set time
			while ((!gpio_get_level(BUTTON)) && (++ticks < LONG_PRESS_IN_SECONDS * 100))
			{
				vTaskDelay(10 / portTICK_PERIOD_MS);
			} 

			// Did fall here because user held a long press or let go for a short press
			if (ticks >= LONG_PRESS_IN_SECONDS * 100)
			{
				ESP_LOGI(TAG, "Long Press");
			}
			else
			{
				ESP_LOGI(TAG, "Short Press");
			}

			// Wait here if they are still holding it
			while(!gpio_get_level(BUTTON))
			{
				vTaskDelay(100 / portTICK_PERIOD_MS);
			}
			
			ESP_LOGI(TAG, "BTN Released.");
		}

	}
}

void app_main()
{
	gpio_set_direction(BUTTON, GPIO_MODE_INPUT);
	gpio_pullup_en(BUTTON);
	
	//start the buton scan task
	xTaskCreate(buttonScanTask, "buttonScanTask", 2048, NULL, 10, NULL);


	while (1) 
	{
		vTaskDelay(1000 / portTICK_RATE_MS);
	}
}

Code: Select all

 save esp_log_timestamp to uint32_t releaseTimestamp;
    uint32_t pressMs = releaseTimestamp - pressTimestamp;
    if(pressMs > LONG_PRESS_MS)
        longPress = true;
    else if(pressMs > DEBOUNCE_MS)
        shortPress = true;