testing touch interface for physical switching

Signed-off-by: Peter Siegmund <mars3142@users.noreply.github.com>

.gitignore

@@ -0,0 +1,3 @@
+**/datasheets
+**/jlcpcb/
+**/*-backups

firmware/components/light/beacon.c

@@ -81,12 +81,8 @@ esp_err_t beacon_start(void)
     {
         ESP_LOGE(TAG, "Failed to start gptimer: %s", esp_err_to_name(ret));
     }
-    else
-    {
-        ESP_LOGI(TAG, "GPTimer started.");
-    }
 
-    ESP_LOGD(TAG, "Beacon started.");
+    ESP_LOGI(TAG, "GPTimer started.");
     return ret;
 }
 
@@ -103,10 +99,7 @@ esp_err_t beacon_stop(void)
     {
         ESP_LOGE(TAG, "Failed to stop gptimer: %s", esp_err_to_name(ret));
     }
-    else
-    {
-        ESP_LOGI(TAG, "GPTimer stopped.");
-    }
+    ESP_LOGI(TAG, "GPTimer stopped.");
 
     ret = gptimer_disable(gptimer);
     if (ret != ESP_OK)

firmware/components/touch/CMakeLists.txt

@@ -0,0 +1,6 @@
+idf_component_register(SRCS 
+                        "src/touch.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        button
+                    )

firmware/components/touch/idf_component.yml

@@ -0,0 +1,5 @@
+dependencies:
+  idf:
+    version: '>=5.4.0'
+  espressif/button: ^4.1.3
+

firmware/components/touch/include/touch.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void init_touch(void);

firmware/components/touch/src/touch.c

@@ -0,0 +1,90 @@
+#include "driver/gpio.h"
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/queue.h"
+#include "freertos/task.h"
+#include "freertos/timers.h"
+
+static const char *TAG = "TOUCH";
+
+#define TOUCH_GPIO_PIN GPIO_NUM_2
+#define DEBOUNCE_TIME_MS 250 // Debounce time in milliseconds
+#define ESP_INTR_FLAG_DEFAULT 0
+
+static QueueHandle_t gpio_evt_queue = NULL;
+static TimerHandle_t debounce_timer = NULL;
+static int last_stable_state = 1; // Last stable state (1 = not pressed)
+static int pending_state = 1;     // Pending state after debouncing
+
+// Timer callback for debouncing
+static void debounce_timer_callback(TimerHandle_t xTimer)
+{
+    int current_level = gpio_get_level(TOUCH_GPIO_PIN);
+
+    // Check if state has remained stable
+    if (current_level == pending_state && current_level != last_stable_state)
+    {
+        last_stable_state = current_level;
+
+        if (current_level == 0)
+        {
+            ESP_LOGI(TAG, "Touch detected (debounced)!");
+        }
+        else
+        {
+            ESP_LOGI(TAG, "Touch released (debounced)!");
+        }
+    }
+}
+
+// Interrupt Service Routine
+static void IRAM_ATTR gpio_isr_handler(void *arg)
+{
+    uint32_t gpio_num = (uint32_t)arg;
+    xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
+}
+
+// Task for processing GPIO events
+static void gpio_task(void *arg)
+{
+    uint32_t io_num;
+
+    for (;;)
+    {
+        if (xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY))
+        {
+            pending_state = gpio_get_level(TOUCH_GPIO_PIN);
+
+            // Restart timer for debouncing
+            xTimerReset(debounce_timer, 0);
+        }
+    }
+}
+
+void init_touch(void)
+{
+    gpio_config_t io_conf = {.intr_type = GPIO_INTR_ANYEDGE,
+                             .mode = GPIO_MODE_INPUT,
+                             .pin_bit_mask = (1ULL << TOUCH_GPIO_PIN),
+                             .pull_down_en = GPIO_PULLDOWN_DISABLE,
+                             .pull_up_en = GPIO_PULLUP_ENABLE};
+
+    gpio_config(&io_conf);
+
+    // Create debounce timer
+    debounce_timer = xTimerCreate("debounce_timer", pdMS_TO_TICKS(DEBOUNCE_TIME_MS),
+                                  pdFALSE, // One-shot timer
+                                  NULL, debounce_timer_callback);
+
+    // Create event queue
+    gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t));
+
+    // Start task
+    xTaskCreate(gpio_task, "gpio_task", 2048, NULL, 10, NULL);
+
+    // Install interrupt service
+    gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT);
+    gpio_isr_handler_add(TOUCH_GPIO_PIN, gpio_isr_handler, (void *)TOUCH_GPIO_PIN);
+
+    ESP_LOGI(TAG, "Touch GPIO on pin %d initialized with debounce", TOUCH_GPIO_PIN);
+}

firmware/main/idf_component.yml

@@ -1,16 +1,3 @@
-## IDF Component Manager Manifest File
 dependencies:
-  ## Required IDF version
   idf:
     version: '>=5.4.0'
-  # # Put list of dependencies here
-  # # For components maintained by Espressif:
-  # component: "~1.0.0"
-  # # For 3rd party components:
-  # username/component: ">=1.0.0,<2.0.0"
-  # username2/component2:
-  #   version: "~1.0.0"
-  #   # For transient dependencies `public` flag can be set.
-  #   # `public` flag doesn't have an effect dependencies of the `main` component.
-  #   # All dependencies of `main` are public by default.
-  #   public: true

firmware/main/main.c

@@ -1,12 +1,17 @@
 #include "light.h"
 #include "persistence.h"
 #include "remote_control.h"
+#include "touch.h"
+
+void init_touch_gpio(void);
 
 void app_main(void)
 {
     /// init persistence
     persistence_init("lighthouse");
 
+    init_touch();
+
     /// init WLED
     if (wled_init() != ESP_OK)
     {
@@ -20,7 +25,10 @@ void app_main(void)
         printf("Failed to initialize beacon");
         return;
     }
-    if (beacon_start() != ESP_OK)
+    /// start beacon service
+    uint8_t beacon_enabled = 1;
+    persistence_load(VALUE_TYPE_INT32, "BEACON_ENABLED", &beacon_enabled);
+    if (beacon_enabled && beacon_start() != ESP_OK)
     {
         printf("Failed to start beacon");
         return;