feat: external pull up detector

firmware/main/main.c

@@ -10,6 +10,7 @@
 #include "leds.h"
 #include "menus_module.h"
 #include "preferences.h"
+#include "resistor_detector.h"
 #include "sd_card.h"
 #include "uart_bridge.h"
 
@@ -19,6 +20,7 @@
 
 static const char* TAG = "main";
 void app_main() {
+  resistor_detector(CONFIG_GPIO_RIGHT_BUTTON);
 #if !defined(CONFIG_MAIN_DEBUG)
   esp_log_level_set(TAG, ESP_LOG_NONE);
 #endif

firmware/main/modules/resistor_detector/resistor_detector.c

@@ -0,0 +1,58 @@
+#include "resistor_detector.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "keyboard_module.h"
+
+#define SAMPLE_COUNT    50
+#define SAMPLE_DELAY_MS 5
+#define C_DISCHARGE_MS  5
+
+static const char* TAG = "Resistor_check";
+
+esp_err_t resistor_detector(gpio_num_t gpio_num) {
+  gpio_config_t temp_config = {.pin_bit_mask = (1ULL << gpio_num),
+                               .mode = GPIO_MODE_OUTPUT,
+                               .pull_up_en = 0,
+                               .pull_down_en = 0,
+                               .intr_type = 0};
+  esp_err_t ret = gpio_config(&temp_config);
+  gpio_set_level(gpio_num, 0);
+  vTaskDelay(pdMS_TO_TICKS(C_DISCHARGE_MS));
+
+  gpio_config_t new_config = {.pin_bit_mask = (1ULL << gpio_num),
+                              .mode = GPIO_MODE_INPUT,
+                              .pull_up_en = 0,
+                              .pull_down_en = 0,
+                              .intr_type = 0};
+  ret = gpio_config(&new_config);
+
+  if (ret != ESP_OK) {
+    ESP_LOGE(TAG, "Error configurando GPIO %d", gpio_num);
+    return ret;
+  }
+
+  int high_count = 0;
+  int low_count = 0;
+
+  for (int i = 0; i < SAMPLE_COUNT; i++) {
+    int pin_value = gpio_get_level(gpio_num);
+
+    if (pin_value == 1) {
+      high_count++;
+    } else {
+      low_count++;
+    }
+
+    vTaskDelay(pdMS_TO_TICKS(5));
+  }
+
+  printf("UP: %d | DOWN: %d\n", high_count, low_count);
+
+  if (ret != ESP_OK) {
+    ESP_LOGE(TAG, "Error restaurando configuración GPIO %d", gpio_num);
+    return ret;
+  }
+
+  return ESP_OK;
+}

firmware/main/modules/resistor_detector/resistor_detector.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdio.h>
+
+#include "driver/gpio.h"
+#include "esp_log.h"
+#include "esp_system.h"
+
+esp_err_t resistor_detector(gpio_num_t gpio_num);