/* * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Unlicense OR CC0-1.0 */ #include #include #include #include #include #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "freertos/queue.h" #include "nvs.h" #include "nvs_flash.h" #include "esp_system.h" #include "esp_log.h" #include "esp_bt.h" #include "bt_app_core.h" #include "bt_app_av.h" #include "esp_bt_main.h" #include "esp_bt_device.h" #include "esp_gap_bt_api.h" #include "esp_a2dp_api.h" #include "esp_avrc_api.h" #include "driver/gpio.h" /* device name */ #define LOCAL_DEVICE_NAME "ESP_SPEAKER" /* event for stack up */ enum { BT_APP_EVT_STACK_UP = 0, }; /* GPIO definitions */ #define GPIO_BTN GPIO_NUM_2 // 按钮引脚 #define GPIO_OUTPUT GPIO_NUM_19 // 输出控制引脚 /* Audio mode states */ typedef enum { AUDIO_MODE_NORMAL = 0, AUDIO_MODE_BASS_BOOST, AUDIO_MODE_MAX } audio_mode_t; static audio_mode_t current_audio_mode = AUDIO_MODE_NORMAL; static QueueHandle_t gpio_evt_queue = NULL; /******************************** * STATIC FUNCTION DECLARATIONS *******************************/ /* Device callback function */ static void bt_app_dev_cb(esp_bt_dev_cb_event_t event, esp_bt_dev_cb_param_t *param); /* GAP callback function */ static void bt_app_gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param); /* handler for bluetooth stack enabled events */ static void bt_av_hdl_stack_evt(uint16_t event, void *p_param); /* GPIO interrupt handler */ static void IRAM_ATTR gpio_isr_handler(void* arg); /* GPIO task to handle events */ static void gpio_task(void* arg); /* Switch audio mode */ static void switch_audio_mode(void); /* Update GPIO output based on audio mode */ static void update_gpio_output(void); /******************************* * STATIC FUNCTION DEFINITIONS ******************************/ static char *bda2str(uint8_t * bda, char *str, size_t size) { if (bda == NULL || str == NULL || size < 18) { return NULL; } uint8_t *p = bda; sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x", p[0], p[1], p[2], p[3], p[4], p[5]); return str; } static void bt_app_dev_cb(esp_bt_dev_cb_event_t event, esp_bt_dev_cb_param_t *param) { switch (event) { case ESP_BT_DEV_NAME_RES_EVT: { if (param->name_res.status == ESP_BT_STATUS_SUCCESS) { ESP_LOGI(BT_AV_TAG, "Get local device name success: %s", param->name_res.name); } else { ESP_LOGE(BT_AV_TAG, "Get local device name failed, status: %d", param->name_res.status); } break; } default: { ESP_LOGI(BT_AV_TAG, "event: %d", event); break; } } } static void bt_app_gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param) { uint8_t *bda = NULL; switch (event) { /* when authentication completed, this event comes */ case ESP_BT_GAP_AUTH_CMPL_EVT: { if (param->auth_cmpl.stat == ESP_BT_STATUS_SUCCESS) { ESP_LOGI(BT_AV_TAG, "authentication success: %s", param->auth_cmpl.device_name); esp_log_buffer_hex(BT_AV_TAG, param->auth_cmpl.bda, ESP_BD_ADDR_LEN); } else { ESP_LOGE(BT_AV_TAG, "authentication failed, status: %d", param->auth_cmpl.stat); } ESP_LOGI(BT_AV_TAG, "link key type of current link is: %d", param->auth_cmpl.lk_type); break; } case ESP_BT_GAP_ENC_CHG_EVT: { char *str_enc[3] = {"OFF", "E0", "AES"}; bda = (uint8_t *)param->enc_chg.bda; ESP_LOGI(BT_AV_TAG, "Encryption mode to [%02x:%02x:%02x:%02x:%02x:%02x] changed to %s", bda[0], bda[1], bda[2], bda[3], bda[4], bda[5], str_enc[param->enc_chg.enc_mode]); break; } #if (CONFIG_EXAMPLE_A2DP_SINK_SSP_ENABLED == true) /* when Security Simple Pairing user confirmation requested, this event comes */ case ESP_BT_GAP_CFM_REQ_EVT: ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_CFM_REQ_EVT Please compare the numeric value: %"PRIu32, param->cfm_req.num_val); esp_bt_gap_ssp_confirm_reply(param->cfm_req.bda, true); break; /* when Security Simple Pairing passkey notified, this event comes */ case ESP_BT_GAP_KEY_NOTIF_EVT: ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_KEY_NOTIF_EVT passkey: %"PRIu32, param->key_notif.passkey); break; /* when Security Simple Pairing passkey requested, this event comes */ case ESP_BT_GAP_KEY_REQ_EVT: ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_KEY_REQ_EVT Please enter passkey!"); break; #endif /* when GAP mode changed, this event comes */ case ESP_BT_GAP_MODE_CHG_EVT: ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_MODE_CHG_EVT mode: %d", param->mode_chg.mode); break; /* when ACL connection completed, this event comes */ case ESP_BT_GAP_ACL_CONN_CMPL_STAT_EVT: bda = (uint8_t *)param->acl_conn_cmpl_stat.bda; ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_ACL_CONN_CMPL_STAT_EVT Connected to [%02x:%02x:%02x:%02x:%02x:%02x], status: 0x%x", bda[0], bda[1], bda[2], bda[3], bda[4], bda[5], param->acl_conn_cmpl_stat.stat); break; /* when ACL disconnection completed, this event comes */ case ESP_BT_GAP_ACL_DISCONN_CMPL_STAT_EVT: bda = (uint8_t *)param->acl_disconn_cmpl_stat.bda; ESP_LOGI(BT_AV_TAG, "ESP_BT_GAP_ACL_DISC_CMPL_STAT_EVT Disconnected from [%02x:%02x:%02x:%02x:%02x:%02x], reason: 0x%x", bda[0], bda[1], bda[2], bda[3], bda[4], bda[5], param->acl_disconn_cmpl_stat.reason); break; /* others */ default: { ESP_LOGI(BT_AV_TAG, "event: %d", event); break; } } } static void bt_av_hdl_stack_evt(uint16_t event, void *p_param) { ESP_LOGD(BT_AV_TAG, "%s event: %d", __func__, event); switch (event) { /* when do the stack up, this event comes */ case BT_APP_EVT_STACK_UP: { esp_bt_gap_set_device_name(LOCAL_DEVICE_NAME); esp_bt_dev_register_callback(bt_app_dev_cb); esp_bt_gap_register_callback(bt_app_gap_cb); assert(esp_avrc_ct_init() == ESP_OK); esp_avrc_ct_register_callback(bt_app_rc_ct_cb); assert(esp_avrc_tg_init() == ESP_OK); esp_avrc_tg_register_callback(bt_app_rc_tg_cb); esp_avrc_rn_evt_cap_mask_t evt_set = {0}; esp_avrc_rn_evt_bit_mask_operation(ESP_AVRC_BIT_MASK_OP_SET, &evt_set, ESP_AVRC_RN_VOLUME_CHANGE); assert(esp_avrc_tg_set_rn_evt_cap(&evt_set) == ESP_OK); assert(esp_a2d_sink_init() == ESP_OK); esp_a2d_register_callback(&bt_app_a2d_cb); esp_a2d_sink_register_data_callback(bt_app_a2d_data_cb); /* Get the default value of the delay value */ esp_a2d_sink_get_delay_value(); /* Get local device name */ esp_bt_gap_get_device_name(); /* set discoverable and connectable mode, wait to be connected */ esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE); break; } /* others */ default: ESP_LOGE(BT_AV_TAG, "%s unhandled event: %d", __func__, event); break; } } static void IRAM_ATTR gpio_isr_handler(void* arg) { uint32_t gpio_num = (uint32_t) arg; xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL); } static void gpio_task(void* arg) { uint32_t io_num; for(;;) { if(xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY)) { // 消抖处理 vTaskDelay(50 / portTICK_PERIOD_MS); if(gpio_get_level(io_num) == 0) { // 确认仍然是低电平 ESP_LOGI(BT_AV_TAG, "GPIO%"PRIu32" interrupt, button pressed", io_num); switch_audio_mode(); } } } } static void switch_audio_mode(void) { // 切换音频模式 current_audio_mode = (current_audio_mode + 1) % AUDIO_MODE_MAX; const char* mode_names[] = { "NORMAL", "BASS_BOOST", }; ESP_LOGI(BT_AV_TAG, "Audio mode switched to: %s", mode_names[current_audio_mode]); // 更新GPIO输出状态 update_gpio_output(); // 这里可以添加实际的音频处理代码 // 例如：调整EQ设置、切换DSP模式等 } static void update_gpio_output(void) { // 根据音频模式设置GPIO19输出状态 switch(current_audio_mode) { case AUDIO_MODE_NORMAL: gpio_set_level(GPIO_OUTPUT, 0); // 低电平 break; case AUDIO_MODE_BASS_BOOST: gpio_set_level(GPIO_OUTPUT, 1); // 高电平 break; default: gpio_set_level(GPIO_OUTPUT, 0); break; } ESP_LOGI(BT_AV_TAG, "GPIO19 set to: %d", gpio_get_level(GPIO_OUTPUT)); } /******************************* * MAIN ENTRY POINT ******************************/ void app_main(void) { char bda_str[18] = {0}; /* initialize NVS — it is used to store PHY calibration data */ esp_err_t err = nvs_flash_init(); if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); err = nvs_flash_init(); } ESP_ERROR_CHECK(err); // todo 拉低引脚 io32 // todo 拉低引脚 io32 - 已完善 // 配置GPIO32为输出模式并拉低电平 gpio_config_t io_conf = { .pin_bit_mask = (1ULL << GPIO_NUM_32), // GPIO32 .mode = GPIO_MODE_OUTPUT, // 输出模式 .pull_up_en = GPIO_PULLUP_DISABLE, // 禁用上拉 .pull_down_en = GPIO_PULLDOWN_DISABLE, // 禁用下拉 .intr_type = GPIO_INTR_DISABLE // 禁用中断 }; // 配置GPIO err = gpio_config(&io_conf); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "GPIO32 config failed: %s", esp_err_to_name(err)); return; } // 拉低GPIO32 err = gpio_set_level(GPIO_NUM_32, 0); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "Set GPIO32 low failed: %s", esp_err_to_name(err)); return; } // system state led gpio_config_t led_io_conf = { .pin_bit_mask = (1ULL << GPIO_NUM_15), // GPIO15 .mode = GPIO_MODE_OUTPUT, // 输出模式 .pull_up_en = GPIO_PULLUP_DISABLE, // 禁用上拉 .pull_down_en = GPIO_PULLDOWN_DISABLE, // 禁用下拉 .intr_type = GPIO_INTR_DISABLE // 禁用中断 }; // 配置GPIO err = gpio_config(&led_io_conf); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "GPIO15 config failed: %s", esp_err_to_name(err)); return; } // 拉低GPIO15 err = gpio_set_level(GPIO_NUM_15, 0); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "Set GPIO15 low failed: %s", esp_err_to_name(err)); return; } ESP_LOGI(BT_AV_TAG, "GPIO15 set to low level"); // 配置GPIO2为输入模式，用于低电平中断 gpio_config_t btn_conf = { .pin_bit_mask = (1ULL << GPIO_BTN), .mode = GPIO_MODE_INPUT, .pull_up_en = GPIO_PULLUP_ENABLE, // 启用上拉，按钮按下时拉低 .pull_down_en = GPIO_PULLDOWN_DISABLE, .intr_type = GPIO_INTR_NEGEDGE // 下降沿触发（按下按钮） }; err = gpio_config(&btn_conf); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "GPIO2 config failed: %s", esp_err_to_name(err)); return; } // 配置GPIO19为输出模式 gpio_config_t output_conf = { .pin_bit_mask = (1ULL << GPIO_OUTPUT), .mode = GPIO_MODE_OUTPUT, .pull_up_en = GPIO_PULLUP_DISABLE, .pull_down_en = GPIO_PULLDOWN_DISABLE, .intr_type = GPIO_INTR_DISABLE }; err = gpio_config(&output_conf); if (err != ESP_OK) { ESP_LOGE(BT_AV_TAG, "GPIO19 config failed: %s", esp_err_to_name(err)); return; } // 初始化GPIO19为低电平 gpio_set_level(GPIO_OUTPUT, 0); // 创建GPIO事件队列 gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t)); // 启动GPIO任务 xTaskCreate(gpio_task, "gpio_task", 2048, NULL, 10, NULL); // 安装GPIO ISR服务 gpio_install_isr_service(0); // 注册GPIO2的中断处理函数 gpio_isr_handler_add(GPIO_BTN, gpio_isr_handler, (void*) GPIO_BTN); ESP_LOGI(BT_AV_TAG, "GPIO2 interrupt and GPIO19 output initialized"); /* * This example only uses the functions of Classical Bluetooth. * So release the controller memory for Bluetooth Low Energy. */ ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_BLE)); esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT(); if ((err = esp_bt_controller_init(&bt_cfg)) != ESP_OK) { ESP_LOGE(BT_AV_TAG, "%s initialize controller failed: %s", __func__, esp_err_to_name(err)); return; } if ((err = esp_bt_controller_enable(ESP_BT_MODE_CLASSIC_BT)) != ESP_OK) { ESP_LOGE(BT_AV_TAG, "%s enable controller failed: %s", __func__, esp_err_to_name(err)); return; } esp_bluedroid_config_t bluedroid_cfg = BT_BLUEDROID_INIT_CONFIG_DEFAULT(); #if (CONFIG_EXAMPLE_A2DP_SINK_SSP_ENABLED == false) bluedroid_cfg.ssp_en = false; #endif if ((err = esp_bluedroid_init_with_cfg(&bluedroid_cfg)) != ESP_OK) { ESP_LOGE(BT_AV_TAG, "%s initialize bluedroid failed: %s", __func__, esp_err_to_name(err)); return; } if ((err = esp_bluedroid_enable()) != ESP_OK) { ESP_LOGE(BT_AV_TAG, "%s enable bluedroid failed: %s", __func__, esp_err_to_name(err)); return; } #if (CONFIG_EXAMPLE_A2DP_SINK_SSP_ENABLED == true) /* set default parameters for Secure Simple Pairing */ esp_bt_sp_param_t param_type = ESP_BT_SP_IOCAP_MODE; esp_bt_io_cap_t iocap = ESP_BT_IO_CAP_IO; esp_bt_gap_set_security_param(param_type, &iocap, sizeof(uint8_t)); #endif /* set default parameters for Legacy Pairing (use fixed pin code 1234) */ esp_bt_pin_type_t pin_type = ESP_BT_PIN_TYPE_FIXED; esp_bt_pin_code_t pin_code; pin_code[0] = '1'; pin_code[1] = '2'; pin_code[2] = '3'; pin_code[3] = '4'; esp_bt_gap_set_pin(pin_type, 4, pin_code); ESP_LOGI(BT_AV_TAG, "Own address:[%s]", bda2str((uint8_t *)esp_bt_dev_get_address(), bda_str, sizeof(bda_str))); bt_app_task_start_up(); /* bluetooth device name, connection mode and profile set up */ bt_app_work_dispatch(bt_av_hdl_stack_evt, BT_APP_EVT_STACK_UP, NULL, 0, NULL); }