initial commit from esp-idf example

2025-12-01 00:20:43 +01:00
commit 41b90a1cac
13 changed files with 926 additions and 0 deletions
--- a/main.c
+++ b/main.c
@@ -0,0 +1,124 @@
+#include "common.h"
+#include "gap.h"
+#include "gatt_svc.h"
+#include "heart_rate.h"
+#include "led.h"
+
+void ble_store_config_init(void);
+
+static void on_stack_reset(int reason);
+static void on_stack_sync(void);
+static void nimble_host_config_init(void);
+static void nimble_host_task(void *param);
+
+/*
+ *  Stack event callback functions
+ *      - on_stack_reset is called when host resets BLE stack due to errors
+ *      - on_stack_sync is called when host has synced with controller
+ */
+static void on_stack_reset(int reason) {
+    /* On reset, print reset reason to console */
+    ESP_LOGI(TAG, "nimble stack reset, reset reason: %d", reason);
+}
+
+static void on_stack_sync(void) {
+    /* On stack sync, do advertising initialization */
+    adv_init();
+}
+
+static void nimble_host_config_init(void) {
+    /* Set host callbacks */
+    ble_hs_cfg.reset_cb = on_stack_reset;
+    ble_hs_cfg.sync_cb = on_stack_sync;
+    ble_hs_cfg.gatts_register_cb = gatt_svr_register_cb;
+    ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
+
+    /* Store host configuration */
+    ble_store_config_init();
+}
+
+static void nimble_host_task(void *param) {
+    /* Task entry log */
+    ESP_LOGI(TAG, "nimble host task has been started!");
+
+    /* This function won't return until nimble_port_stop() is executed */
+    nimble_port_run();
+
+    /* Clean up at exit */
+    vTaskDelete(NULL);
+}
+
+static void heart_rate_task(void *param) {
+    /* Task entry log */
+    ESP_LOGI(TAG, "heart rate task has been started!");
+
+    /* Loop forever */
+    while (1) {
+        /* Update heart rate value every 1 second */
+        update_heart_rate();
+        ESP_LOGI(TAG, "heart rate updated to %d", get_heart_rate());
+
+        /* Send heart rate indication if enabled */
+        send_heart_rate_indication();
+
+        /* Sleep */
+        vTaskDelay(HEART_RATE_TASK_PERIOD);
+    }
+
+    /* Clean up at exit */
+    vTaskDelete(NULL);
+}
+
+void app_main(void) {
+    /* Local variables */
+    int rc;
+    esp_err_t ret;
+
+    /* LED initialization */
+    led_init();
+
+    /*
+     * NVS flash initialization
+     * Dependency of BLE stack to store configurations
+     */
+    ret = nvs_flash_init();
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
+        ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+        ESP_ERROR_CHECK(nvs_flash_erase());
+        ret = nvs_flash_init();
+    }
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "failed to initialize nvs flash, error code: %d ", ret);
+        return;
+    }
+
+    /* NimBLE stack initialization */
+    ret = nimble_port_init();
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "failed to initialize nimble stack, error code: %d ",
+                 ret);
+        return;
+    }
+
+    /* GAP service initialization */
+    rc = gap_init();
+    if (rc != 0) {
+        ESP_LOGE(TAG, "failed to initialize GAP service, error code: %d", rc);
+        return;
+    }
+
+    /* GATT server initialization */
+    rc = gatt_svc_init();
+    if (rc != 0) {
+        ESP_LOGE(TAG, "failed to initialize GATT server, error code: %d", rc);
+        return;
+    }
+
+    /* NimBLE host configuration initialization */
+    nimble_host_config_init();
+
+    /* Start NimBLE host task thread and return */
+    xTaskCreate(nimble_host_task, "NimBLE Host", 4*1024, NULL, 5, NULL);
+    xTaskCreate(heart_rate_task, "Heart Rate", 4*1024, NULL, 5, NULL);
+    return;
+}