├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── img ├── sc170503a1.png ├── sc180402a1.PNG ├── sc180402a2.PNG └── sc180402a3.PNG ├── main ├── Kconfig.projbuild ├── bt_app_av.c ├── bt_app_av.h ├── bt_app_core.c ├── bt_app_core.h ├── component.mk └── main.c └── sdkconfig.defaults /.gitignore: -------------------------------------------------------------------------------- 1 | sdkconfig 2 | sdkconfig.old 3 | build 4 | 5 | # Object files 6 | *.o 7 | *.ko 8 | *.obj 9 | *.elf 10 | 11 | # Precompiled Headers 12 | *.gch 13 | *.pch 14 | 15 | # Libraries 16 | *.lib 17 | *.a 18 | *.la 19 | *.lo 20 | 21 | # Shared objects (inc. Windows DLLs) 22 | *.dll 23 | *.so 24 | *.so.* 25 | *.dylib 26 | 27 | # Executables 28 | *.exe 29 | *.out 30 | *.app 31 | *.i*86 32 | *.x86_64 33 | *.hex 34 | 35 | # Debug files 36 | *.dSYM/ 37 | *.su 38 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2017 Hiroshi Narimatsu 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | # 2 | # This is a project Makefile. It is assumed the directory this Makefile resides in is a 3 | # project subdirectory. 4 | # 5 | 6 | PROJECT_NAME := bt-speaker 7 | 8 | include $(IDF_PATH)/make/project.mk 9 | 10 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ESP32_bt_speaker 2 | bluetooth speaker using I2S + built in DAC 3 | 4 | * esp-idfのexamples/bluetooth/a2dp_sinkを元に、ESP32内蔵DACから音声を出力します。 5 | * esp-idf環境用です。 6 | 7 | 2018年2月20日(火)追記 8 | 9 | * esp-idfが、かなり変更されたので更新しました。 10 | * esp-idfのexamples/bluetooth/a2dp_sinkがDAC/I2S DA 11 | 　出力をサポートしたけど、まだ動かないので、 12 | 　これを動くように修正したものに置き換えました。 13 | * 以下の問題が残っています。解決策をご存じの方は、教えていだけますとありがたいです。 14 | * 音量を上げると音が割れる問題 15 | * 音の出力先を変えるなどして 通信がsuspendすると変な音が出続ける問題 (DMAバッファに音データが残る？) 16 | 17 | 2018年4月2日(月)追記 18 | 19 | * main/Kconfig.projbuild の追加忘れで、うまくコンパイル出来ない問題を修正しました。 20 | * 初回make時、或いはmake menuconfigの設定画面で 21 | * A2DP Example Configuration --> を選択 22 | * A2DP Sink Output (Internal DAC) ---> を選択 23 | * Internal DAC を選択してください。 24 | * Serial Flasher configでシリアルポートの設定も行ってください。 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | ## 接続 34 | 35 | 36 | 37 | * 半固定抵抗ではなく、100Ωと1KΩで1/10程度に固定比で分圧しても問題ないと思います。 38 | * コンデンサの容量は 10uF程度にした方が音質がよくなるかもしれません。 39 | 40 | ## デモ動画 41 | 42 | * ESP32内蔵DA出力Bluetooth speaker 43 | -------------------------------------------------------------------------------- /img/sc170503a1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/h-nari/ESP32_bt_speaker/1a84c3aac2402e33b347c8af4a5dd4b087bfadfa/img/sc170503a1.png -------------------------------------------------------------------------------- /img/sc180402a1.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/h-nari/ESP32_bt_speaker/1a84c3aac2402e33b347c8af4a5dd4b087bfadfa/img/sc180402a1.PNG -------------------------------------------------------------------------------- /img/sc180402a2.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/h-nari/ESP32_bt_speaker/1a84c3aac2402e33b347c8af4a5dd4b087bfadfa/img/sc180402a2.PNG -------------------------------------------------------------------------------- /img/sc180402a3.PNG: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/h-nari/ESP32_bt_speaker/1a84c3aac2402e33b347c8af4a5dd4b087bfadfa/img/sc180402a3.PNG -------------------------------------------------------------------------------- /main/Kconfig.projbuild: -------------------------------------------------------------------------------- 1 | menu "A2DP Example Configuration" 2 | 3 | choice A2DP_SINK_OUTPUT 4 | prompt "A2DP Sink Output" 5 | default A2DP_SINK_OUTPUT_EXTERNAL_I2S 6 | help 7 | Select to use Internal DAC or external I2S driver 8 | 9 | config A2DP_SINK_OUTPUT_INTERNAL_DAC 10 | bool "Internal DAC" 11 | help 12 | Select this to use Internal DAC sink output 13 | 14 | config A2DP_SINK_OUTPUT_EXTERNAL_I2S 15 | bool "External I2S Codec" 16 | help 17 | Select this to use External I2S sink output 18 | 19 | endchoice 20 | 21 | config I2S_LRCK_PIN 22 | int "I2S LRCK (WS) GPIO" 23 | default 22 24 | depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S 25 | help 26 | GPIO number to use for I2S LRCK(WS) Driver. 27 | 28 | config I2S_BCK_PIN 29 | int "I2S BCK GPIO" 30 | default 26 31 | depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S 32 | help 33 | GPIO number to use for I2S BCK Driver. 34 | 35 | config I2S_DATA_PIN 36 | int "I2S DATA GPIO" 37 | default 25 38 | depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S 39 | help 40 | GPIO number to use for I2S Data Driver. 41 | 42 | 43 | endmenu 44 | -------------------------------------------------------------------------------- /main/bt_app_av.c: -------------------------------------------------------------------------------- 1 | 2 | /* 3 | This example code is in the Public Domain (or CC0 licensed, at your option.) 4 | 5 | Unless required by applicable law or agreed to in writing, this 6 | software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 7 | CONDITIONS OF ANY KIND, either express or implied. 8 | */ 9 | 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include "esp_log.h" 15 | 16 | #include "bt_app_core.h" 17 | #include "bt_app_av.h" 18 | #include "esp_bt_main.h" 19 | #include "esp_bt_device.h" 20 | #include "esp_gap_bt_api.h" 21 | #include "esp_a2dp_api.h" 22 | #include "esp_avrc_api.h" 23 | 24 | #include "freertos/FreeRTOS.h" 25 | #include "freertos/task.h" 26 | #include "driver/i2s.h" 27 | 28 | /* a2dp event handler */ 29 | static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param); 30 | /* avrc event handler */ 31 | static void bt_av_hdl_avrc_evt(uint16_t event, void *p_param); 32 | 33 | static uint32_t m_pkt_cnt = 0; 34 | static esp_a2d_audio_state_t m_audio_state = ESP_A2D_AUDIO_STATE_STOPPED; 35 | static const char *m_a2d_conn_state_str[] = {"Disconnected", "Connecting", "Connected", "Disconnecting"}; 36 | static const char *m_a2d_audio_state_str[] = {"Suspended", "Stopped", "Started"}; 37 | 38 | /* callback for A2DP sink */ 39 | void bt_app_a2d_cb(esp_a2d_cb_event_t event, esp_a2d_cb_param_t *param) 40 | { 41 | switch (event) { 42 | case ESP_A2D_CONNECTION_STATE_EVT: 43 | case ESP_A2D_AUDIO_STATE_EVT: 44 | case ESP_A2D_AUDIO_CFG_EVT: { 45 | bt_app_work_dispatch(bt_av_hdl_a2d_evt, event, param, sizeof(esp_a2d_cb_param_t), NULL); 46 | break; 47 | } 48 | default: 49 | ESP_LOGE(BT_AV_TAG, "Invalid A2DP event: %d", event); 50 | break; 51 | } 52 | } 53 | 54 | void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len) 55 | { 56 | TickType_t delay = 50 / portTICK_PERIOD_MS; 57 | if(len % 8){ 58 | ESP_LOGE(BT_AV_TAG,"unexpected data len:%u",len); 59 | return; 60 | } 61 | 62 | for(int i=0; imeta_rsp.attr_length + 1); 86 | memcpy(attr_text, rc->meta_rsp.attr_text, rc->meta_rsp.attr_length); 87 | attr_text[rc->meta_rsp.attr_length] = 0; 88 | 89 | rc->meta_rsp.attr_text = attr_text; 90 | } 91 | 92 | void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param) 93 | { 94 | switch (event) { 95 | case ESP_AVRC_CT_METADATA_RSP_EVT: 96 | bt_app_alloc_meta_buffer(param); 97 | case ESP_AVRC_CT_CONNECTION_STATE_EVT: 98 | case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT: 99 | case ESP_AVRC_CT_CHANGE_NOTIFY_EVT: 100 | case ESP_AVRC_CT_REMOTE_FEATURES_EVT: { 101 | bt_app_work_dispatch(bt_av_hdl_avrc_evt, event, param, sizeof(esp_avrc_ct_cb_param_t), NULL); 102 | break; 103 | } 104 | default: 105 | ESP_LOGE(BT_AV_TAG, "Invalid AVRC event: %d", event); 106 | break; 107 | } 108 | } 109 | 110 | static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param) 111 | { 112 | ESP_LOGD(BT_AV_TAG, "%s evt %d", __func__, event); 113 | esp_a2d_cb_param_t *a2d = NULL; 114 | switch (event) { 115 | case ESP_A2D_CONNECTION_STATE_EVT: { 116 | a2d = (esp_a2d_cb_param_t *)(p_param); 117 | uint8_t *bda = a2d->conn_stat.remote_bda; 118 | ESP_LOGI(BT_AV_TAG, "A2DP connection state: %s, [%02x:%02x:%02x:%02x:%02x:%02x]", 119 | m_a2d_conn_state_str[a2d->conn_stat.state], bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]); 120 | break; 121 | } 122 | case ESP_A2D_AUDIO_STATE_EVT: { 123 | a2d = (esp_a2d_cb_param_t *)(p_param); 124 | ESP_LOGI(BT_AV_TAG, "A2DP audio state: %s", m_a2d_audio_state_str[a2d->audio_stat.state]); 125 | m_audio_state = a2d->audio_stat.state; 126 | if (ESP_A2D_AUDIO_STATE_STARTED == a2d->audio_stat.state) { 127 | m_pkt_cnt = 0; 128 | } 129 | break; 130 | } 131 | case ESP_A2D_AUDIO_CFG_EVT: { 132 | a2d = (esp_a2d_cb_param_t *)(p_param); 133 | ESP_LOGI(BT_AV_TAG, "A2DP audio stream configuration, codec type %d", a2d->audio_cfg.mcc.type); 134 | // for now only SBC stream is supported 135 | if (a2d->audio_cfg.mcc.type == ESP_A2D_MCT_SBC) { 136 | int sample_rate = 16000; 137 | char oct0 = a2d->audio_cfg.mcc.cie.sbc[0]; 138 | if (oct0 & (0x01 << 6)) { 139 | sample_rate = 32000; 140 | } else if (oct0 & (0x01 << 5)) { 141 | sample_rate = 44100; 142 | } else if (oct0 & (0x01 << 4)) { 143 | sample_rate = 48000; 144 | } 145 | i2s_set_clk(0, sample_rate, 16, 2); 146 | 147 | ESP_LOGI(BT_AV_TAG, "Configure audio player %x-%x-%x-%x", 148 | a2d->audio_cfg.mcc.cie.sbc[0], 149 | a2d->audio_cfg.mcc.cie.sbc[1], 150 | a2d->audio_cfg.mcc.cie.sbc[2], 151 | a2d->audio_cfg.mcc.cie.sbc[3]); 152 | ESP_LOGI(BT_AV_TAG, "Audio player configured, sample rate=%d", sample_rate); 153 | } 154 | break; 155 | } 156 | default: 157 | ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event); 158 | break; 159 | } 160 | } 161 | 162 | static void bt_av_new_track() 163 | { 164 | //Register notifications and request metadata 165 | esp_avrc_ct_send_metadata_cmd(0, ESP_AVRC_MD_ATTR_TITLE | ESP_AVRC_MD_ATTR_ARTIST | ESP_AVRC_MD_ATTR_ALBUM | ESP_AVRC_MD_ATTR_GENRE); 166 | esp_avrc_ct_send_register_notification_cmd(1, ESP_AVRC_RN_TRACK_CHANGE, 0); 167 | } 168 | 169 | void bt_av_notify_evt_handler(uint8_t event_id, uint32_t event_parameter) 170 | { 171 | switch (event_id) { 172 | case ESP_AVRC_RN_TRACK_CHANGE: 173 | bt_av_new_track(); 174 | break; 175 | } 176 | } 177 | 178 | static void bt_av_hdl_avrc_evt(uint16_t event, void *p_param) 179 | { 180 | ESP_LOGD(BT_AV_TAG, "%s evt %d", __func__, event); 181 | esp_avrc_ct_cb_param_t *rc = (esp_avrc_ct_cb_param_t *)(p_param); 182 | switch (event) { 183 | case ESP_AVRC_CT_CONNECTION_STATE_EVT: { 184 | uint8_t *bda = rc->conn_stat.remote_bda; 185 | ESP_LOGI(BT_AV_TAG, "AVRC conn_state evt: state %d, [%02x:%02x:%02x:%02x:%02x:%02x]", 186 | rc->conn_stat.connected, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]); 187 | 188 | if (rc->conn_stat.connected) { 189 | bt_av_new_track(); 190 | } 191 | break; 192 | } 193 | case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT: { 194 | ESP_LOGI(BT_AV_TAG, "AVRC passthrough rsp: key_code 0x%x, key_state %d", rc->psth_rsp.key_code, rc->psth_rsp.key_state); 195 | break; 196 | } 197 | case ESP_AVRC_CT_METADATA_RSP_EVT: { 198 | ESP_LOGI(BT_AV_TAG, "AVRC metadata rsp: attribute id 0x%x, %s", rc->meta_rsp.attr_id, rc->meta_rsp.attr_text); 199 | free(rc->meta_rsp.attr_text); 200 | break; 201 | } 202 | case ESP_AVRC_CT_CHANGE_NOTIFY_EVT: { 203 | ESP_LOGI(BT_AV_TAG, "AVRC event notification: %d, param: %d", rc->change_ntf.event_id, rc->change_ntf.event_parameter); 204 | bt_av_notify_evt_handler(rc->change_ntf.event_id, rc->change_ntf.event_parameter); 205 | break; 206 | } 207 | case ESP_AVRC_CT_REMOTE_FEATURES_EVT: { 208 | ESP_LOGI(BT_AV_TAG, "AVRC remote features %x", rc->rmt_feats.feat_mask); 209 | break; 210 | } 211 | default: 212 | ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event); 213 | break; 214 | } 215 | } 216 | -------------------------------------------------------------------------------- /main/bt_app_av.h: -------------------------------------------------------------------------------- 1 | /* 2 | This example code is in the Public Domain (or CC0 licensed, at your option.) 3 | 4 | Unless required by applicable law or agreed to in writing, this 5 | software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 6 | CONDITIONS OF ANY KIND, either express or implied. 7 | */ 8 | 9 | #ifndef __BT_APP_AV_H__ 10 | #define __BT_APP_AV_H__ 11 | 12 | #include 13 | #include "esp_a2dp_api.h" 14 | #include "esp_avrc_api.h" 15 | 16 | #define BT_AV_TAG "BT_AV" 17 | 18 | /** 19 | * @brief callback function for A2DP sink 20 | */ 21 | void bt_app_a2d_cb(esp_a2d_cb_event_t event, esp_a2d_cb_param_t *param); 22 | 23 | /** 24 | * @brief callback function for A2DP sink audio data stream 25 | */ 26 | void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len); 27 | 28 | /** 29 | * @brief callback function for AVRCP controller 30 | */ 31 | void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param); 32 | 33 | #endif /* __BT_APP_AV_H__*/ 34 | -------------------------------------------------------------------------------- /main/bt_app_core.c: -------------------------------------------------------------------------------- 1 | /* 2 | This example code is in the Public Domain (or CC0 licensed, at your option.) 3 | 4 | Unless required by applicable law or agreed to in writing, this 5 | software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 6 | CONDITIONS OF ANY KIND, either express or implied. 7 | */ 8 | 9 | #include 10 | #include 11 | #include 12 | #include "freertos/xtensa_api.h" 13 | #include "freertos/FreeRTOSConfig.h" 14 | #include "freertos/FreeRTOS.h" 15 | #include "freertos/queue.h" 16 | #include "freertos/task.h" 17 | #include "esp_log.h" 18 | #include "bt_app_core.h" 19 | 20 | static void bt_app_task_handler(void *arg); 21 | static bool bt_app_send_msg(bt_app_msg_t *msg); 22 | static void bt_app_work_dispatched(bt_app_msg_t *msg); 23 | 24 | static xQueueHandle bt_app_task_queue = NULL; 25 | static xTaskHandle bt_app_task_handle = NULL; 26 | 27 | bool bt_app_work_dispatch(bt_app_cb_t p_cback, uint16_t event, void *p_params, int param_len, bt_app_copy_cb_t p_copy_cback) 28 | { 29 | ESP_LOGD(BT_APP_CORE_TAG, "%s event 0x%x, param len %d", __func__, event, param_len); 30 | 31 | bt_app_msg_t msg; 32 | memset(&msg, 0, sizeof(bt_app_msg_t)); 33 | 34 | msg.sig = BT_APP_SIG_WORK_DISPATCH; 35 | msg.event = event; 36 | msg.cb = p_cback; 37 | 38 | if (param_len == 0) { 39 | return bt_app_send_msg(&msg); 40 | } else if (p_params && param_len > 0) { 41 | if ((msg.param = malloc(param_len)) != NULL) { 42 | memcpy(msg.param, p_params, param_len); 43 | /* check if caller has provided a copy callback to do the deep copy */ 44 | if (p_copy_cback) { 45 | p_copy_cback(&msg, msg.param, p_params); 46 | } 47 | return bt_app_send_msg(&msg); 48 | } 49 | } 50 | 51 | return false; 52 | } 53 | 54 | static bool bt_app_send_msg(bt_app_msg_t *msg) 55 | { 56 | if (msg == NULL) { 57 | return false; 58 | } 59 | 60 | if (xQueueSend(bt_app_task_queue, msg, 10 / portTICK_RATE_MS) != pdTRUE) { 61 | ESP_LOGE(BT_APP_CORE_TAG, "%s xQueue send failed", __func__); 62 | return false; 63 | } 64 | return true; 65 | } 66 | 67 | static void bt_app_work_dispatched(bt_app_msg_t *msg) 68 | { 69 | if (msg->cb) { 70 | msg->cb(msg->event, msg->param); 71 | } 72 | } 73 | 74 | static void bt_app_task_handler(void *arg) 75 | { 76 | bt_app_msg_t msg; 77 | for (;;) { 78 | if (pdTRUE == xQueueReceive(bt_app_task_queue, &msg, (portTickType)portMAX_DELAY)) { 79 | ESP_LOGD(BT_APP_CORE_TAG, "%s, sig 0x%x, 0x%x", __func__, msg.sig, msg.event); 80 | switch (msg.sig) { 81 | case BT_APP_SIG_WORK_DISPATCH: 82 | bt_app_work_dispatched(&msg); 83 | break; 84 | default: 85 | ESP_LOGW(BT_APP_CORE_TAG, "%s, unhandled sig: %d", __func__, msg.sig); 86 | break; 87 | } // switch (msg.sig) 88 | 89 | if (msg.param) { 90 | free(msg.param); 91 | } 92 | } 93 | } 94 | } 95 | 96 | void bt_app_task_start_up(void) 97 | { 98 | bt_app_task_queue = xQueueCreate(10, sizeof(bt_app_msg_t)); 99 | xTaskCreate(bt_app_task_handler, "BtAppT", 2048, NULL, configMAX_PRIORITIES - 3, bt_app_task_handle); 100 | return; 101 | } 102 | 103 | void bt_app_task_shut_down(void) 104 | { 105 | if (bt_app_task_handle) { 106 | vTaskDelete(bt_app_task_handle); 107 | bt_app_task_handle = NULL; 108 | } 109 | if (bt_app_task_queue) { 110 | vQueueDelete(bt_app_task_queue); 111 | bt_app_task_queue = NULL; 112 | } 113 | } 114 | -------------------------------------------------------------------------------- /main/bt_app_core.h: -------------------------------------------------------------------------------- 1 | /* 2 | This example code is in the Public Domain (or CC0 licensed, at your option.) 3 | 4 | Unless required by applicable law or agreed to in writing, this 5 | software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 6 | CONDITIONS OF ANY KIND, either express or implied. 7 | */ 8 | 9 | #ifndef __BT_APP_CORE_H__ 10 | #define __BT_APP_CORE_H__ 11 | 12 | #include 13 | #include 14 | #include 15 | 16 | #define BT_APP_CORE_TAG "BT_APP_CORE" 17 | 18 | #define BT_APP_SIG_WORK_DISPATCH (0x01) 19 | 20 | /** 21 | * @brief handler for the dispatched work 22 | */ 23 | typedef void (* bt_app_cb_t) (uint16_t event, void *param); 24 | 25 | /* message to be sent */ 26 | typedef struct { 27 | uint16_t sig; /*!< signal to bt_app_task */ 28 | uint16_t event; /*!< message event id */ 29 | bt_app_cb_t cb; /*!< context switch callback */ 30 | void *param; /*!< parameter area needs to be last */ 31 | } bt_app_msg_t; 32 | 33 | /** 34 | * @brief parameter deep-copy function to be customized 35 | */ 36 | typedef void (* bt_app_copy_cb_t) (bt_app_msg_t *msg, void *p_dest, void *p_src); 37 | 38 | /** 39 | * @brief work dispatcher for the application task 40 | */ 41 | bool bt_app_work_dispatch(bt_app_cb_t p_cback, uint16_t event, void *p_params, int param_len, bt_app_copy_cb_t p_copy_cback); 42 | 43 | void bt_app_task_start_up(void); 44 | 45 | void bt_app_task_shut_down(void); 46 | 47 | #endif /* __BT_APP_CORE_H__ */ 48 | -------------------------------------------------------------------------------- /main/component.mk: -------------------------------------------------------------------------------- 1 | # 2 | # "main" pseudo-component makefile. 3 | # 4 | # (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.) 5 | 6 | -------------------------------------------------------------------------------- /main/main.c: -------------------------------------------------------------------------------- 1 | // Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD 2 | // 3 | // Licensed under the Apache License, Version 2.0 (the "License"); 4 | // you may not use this file except in compliance with the License. 5 | // You may obtain a copy of the License at 6 | 7 | // http://www.apache.org/licenses/LICENSE-2.0 8 | // 9 | // Unless required by applicable law or agreed to in writing, software 10 | // distributed under the License is distributed on an "AS IS" BASIS, 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | // See the License for the specific language governing permissions and 13 | // limitations under the License. 14 | 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include "freertos/FreeRTOS.h" 20 | #include "freertos/task.h" 21 | #include "nvs.h" 22 | #include "nvs_flash.h" 23 | #include "esp_system.h" 24 | #include "esp_log.h" 25 | 26 | #include "esp_bt.h" 27 | #include "bt_app_core.h" 28 | #include "bt_app_av.h" 29 | #include "esp_bt_main.h" 30 | #include "esp_bt_device.h" 31 | #include "esp_gap_bt_api.h" 32 | #include "esp_a2dp_api.h" 33 | #include "esp_avrc_api.h" 34 | #include "driver/i2s.h" 35 | 36 | /* event for handler "bt_av_hdl_stack_up */ 37 | enum { 38 | BT_APP_EVT_STACK_UP = 0, 39 | }; 40 | 41 | /* handler for bluetooth stack enabled events */ 42 | static void bt_av_hdl_stack_evt(uint16_t event, void *p_param); 43 | 44 | 45 | void app_main() 46 | { 47 | /* Initialize NVS — it is used to store PHY calibration data */ 48 | esp_err_t ret = nvs_flash_init(); 49 | if (ret == ESP_ERR_NVS_NO_FREE_PAGES) { 50 | ESP_ERROR_CHECK(nvs_flash_erase()); 51 | ret = nvs_flash_init(); 52 | } 53 | ESP_ERROR_CHECK( ret ); 54 | 55 | i2s_config_t i2s_config = { 56 | #ifdef CONFIG_A2DP_SINK_OUTPUT_INTERNAL_DAC 57 | .mode = I2S_MODE_DAC_BUILT_IN | I2S_MODE_MASTER | I2S_MODE_TX, 58 | #else 59 | .mode = I2S_MODE_MASTER | I2S_MODE_TX, // Only TX 60 | #endif 61 | .sample_rate = 44100, 62 | .bits_per_sample = 16, 63 | .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT, //2-channels 64 | .communication_format = I2S_COMM_FORMAT_I2S_MSB, 65 | .dma_buf_count = 6, 66 | .dma_buf_len = 60, // 67 | .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1 //Interrupt level 1 68 | }; 69 | 70 | 71 | i2s_driver_install(0, &i2s_config, 0, NULL); 72 | #ifdef CONFIG_A2DP_SINK_OUTPUT_INTERNAL_DAC 73 | i2s_set_pin(0, NULL); 74 | #else 75 | i2s_pin_config_t pin_config = { 76 | .bck_io_num = CONFIG_I2S_BCK_PIN, 77 | .ws_io_num = CONFIG_I2S_LRCK_PIN, 78 | .data_out_num = CONFIG_I2S_DATA_PIN, 79 | .data_in_num = -1 //Not used 80 | }; 81 | 82 | i2s_set_pin(0, &pin_config); 83 | #endif 84 | 85 | 86 | ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_BLE)); 87 | 88 | esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT(); 89 | if (esp_bt_controller_init(&bt_cfg) != ESP_OK) { 90 | ESP_LOGE(BT_AV_TAG, "%s initialize controller failed\n", __func__); 91 | return; 92 | } 93 | 94 | if (esp_bt_controller_enable(ESP_BT_MODE_CLASSIC_BT) != ESP_OK) { 95 | ESP_LOGE(BT_AV_TAG, "%s enable controller failed\n", __func__); 96 | return; 97 | } 98 | 99 | if (esp_bluedroid_init() != ESP_OK) { 100 | ESP_LOGE(BT_AV_TAG, "%s initialize bluedroid failed\n", __func__); 101 | return; 102 | } 103 | 104 | if (esp_bluedroid_enable() != ESP_OK) { 105 | ESP_LOGE(BT_AV_TAG, "%s enable bluedroid failed\n", __func__); 106 | return; 107 | } 108 | 109 | /* create application task */ 110 | bt_app_task_start_up(); 111 | 112 | /* Bluetooth device name, connection mode and profile set up */ 113 | bt_app_work_dispatch(bt_av_hdl_stack_evt, BT_APP_EVT_STACK_UP, NULL, 0, NULL); 114 | } 115 | 116 | 117 | static void bt_av_hdl_stack_evt(uint16_t event, void *p_param) 118 | { 119 | ESP_LOGD(BT_AV_TAG, "%s evt %d", __func__, event); 120 | switch (event) { 121 | case BT_APP_EVT_STACK_UP: { 122 | /* set up device name */ 123 | char *dev_name = "ESP_SPEAKER"; 124 | esp_bt_dev_set_device_name(dev_name); 125 | 126 | /* initialize A2DP sink */ 127 | esp_a2d_register_callback(&bt_app_a2d_cb); 128 | esp_a2d_sink_register_data_callback(bt_app_a2d_data_cb); 129 | esp_a2d_sink_init(); 130 | 131 | /* initialize AVRCP controller */ 132 | esp_avrc_ct_init(); 133 | esp_avrc_ct_register_callback(bt_app_rc_ct_cb); 134 | 135 | /* set discoverable and connectable mode, wait to be connected */ 136 | esp_bt_gap_set_scan_mode(ESP_BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE); 137 | break; 138 | } 139 | default: 140 | ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event); 141 | break; 142 | } 143 | } 144 | -------------------------------------------------------------------------------- /sdkconfig.defaults: -------------------------------------------------------------------------------- 1 | # Override some defaults so BT stack is enabled and 2 | # Classic BT is enabled and BT_DRAM_RELEASE is disabled 3 | CONFIG_BT_ENABLED=y 4 | CONFIG_BLUEDROID_ENABLED=y 5 | CONFIG_CLASSIC_BT_ENABLED=y 6 | CONFIG_A2DP_ENABLE=y 7 | CONFIG_A2DP_SINK_ENABLE=y 8 | CONFIG_A2DP_SRC_ENABLE= 9 | CONFIG_BT_SPP_ENABLED= 10 | CONFIG_GATTS_ENABLE= 11 | CONFIG_GATTC_ENABLE= 12 | CONFIG_BLE_SMP_ENABLE= 13 | --------------------------------------------------------------------------------