oui

part2_architecture/lab4-1_gio_polling_mode/main/CMakeLists.txt

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+idf_component_register(
+            SRC_DIRS "." 
+            INCLUDE_DIRS ".")

part2_architecture/lab4-1_gio_polling_mode/main/component.mk

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+COMPONENT_SRCDIRS := .
+COMPONENT_ADD_INCLUDEDIRS := .

part2_architecture/lab4-1_gio_polling_mode/main/main.c

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+/****************************************************************************
+ * Copyright (C) 2020 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file lab4-1_main.c
+ * @author Fabrice Muller
+ * @date 30 Sept. 2020
+ * @brief File containing the lab4-1 of Part 2.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+
+// Led: RTC_GPIO12
+static const gpio_num_t PIN_LED = 2;
+
+// Push button: RTC_GPIO13
+static const gpio_num_t PIN_PUSH_BUTTON = 15;
+
+// Press Counter
+static volatile uint32_t count=0;
+
+/**
+ * @brief Starting point function
+ * 
+ */
+
+void app_main(void) {
+
+ gpio_config_t config_out = {
+		.intr_type = GPIO_INTR_DISABLE,
+		.mode = GPIO_MODE_OUTPUT,
+		.pin_bit_mask = (1ULL<<PIN_LED),
+	};
+	gpio_config(&config_out);
+
+
+	gpio_config_t config_in = {
+		.intr_type = GPIO_INTR_DISABLE,
+		.mode = GPIO_MODE_INPUT,
+		.pull_down_en= GPIO_PULLDOWN_DISABLE,
+		.pull_up_en = GPIO_PULLUP_ENABLE,
+		.pin_bit_mask = (1ULL<<PIN_PUSH_BUTTON),
+	};
+	gpio_config(&config_in);
+
+  int buttonState;
+  uint32_t previous_count=-1;
+  while (true) {
+      for (int i=0; i<5; i++) {
+        buttonState = gpio_get_level(PIN_PUSH_BUTTON);
+        if (buttonState == 0) {
+          while (gpio_get_level(PIN_PUSH_BUTTON) == 0) {
+			usleep(1000); 
+          };
+          count++;
+          gpio_set_level(PIN_LED, (count % 2)); 
+        }
+      }
+
+      if (previous_count != count) {
+          uint32_t pressNumber = count-previous_count;
+          if (pressNumber == 1)
+            printf("count: %d\n", count);
+          else
+            printf("count (bounce: %d): %d\n", pressNumber, count);
+          
+          previous_count = count;
+      }
+  }
+}
+