main/ble_gatts.c@ec5c7794dcd6
main/ble_gatts.c
Mon, 17 Apr 2023 14:54:35 +0200
- author
- Michiel Broek <mbroek@mbse.eu>
- date
- Mon, 17 Apr 2023 14:54:35 +0200
- changeset 31
- ec5c7794dcd6
- permissions
- -rw-r--r--
Added basic BLE code.
/** * @file ble_gatts.c * @brief BLE GATTS services. */ #include "config.h" static const char *TAG = "ble_gatts"; #define PROFILE_NUM 1 #define PROFILE_RGB_APP_ID 0 #define PROFILE_RGB_NUM_HANDLE 3 #ifdef USE_BATTERY /// characteristic presentation information struct char_pres_fmt { uint16_t unit; ///< Unit (The Unit is a UUID) uint16_t description; ///< Description uint8_t format; uint8_t exponent; uint8_t name_space; ///< Name space }; static const uint16_t primary_service_uuid = ESP_GATT_UUID_PRI_SERVICE; static const uint16_t character_declaration_uuid = ESP_GATT_UUID_CHAR_DECLARE; static const uint16_t character_client_config_uuid = ESP_GATT_UUID_CHAR_CLIENT_CONFIG; static const uint8_t char_prop_notify = ESP_GATT_CHAR_PROP_BIT_NOTIFY; static const uint8_t char_prop_read = ESP_GATT_CHAR_PROP_BIT_READ; static const uint8_t char_prop_read_notify = ESP_GATT_CHAR_PROP_BIT_READ|ESP_GATT_CHAR_PROP_BIT_NOTIFY; #endif uint8_t rgb_service_uuid[ESP_UUID_LEN_128] = {0x00, 0x56, 0xa5, 0x97, 0xd2, 0xb7, 0x2e, 0x81, 0x57, 0x49, 0x00, 0x47, 0x6c, 0x55, 0x02, 0x3b}; uint8_t rgb_characteristic_uuid[ESP_UUID_LEN_128] = {0x00, 0x56, 0xa5, 0x97, 0xd2, 0xb7, 0x2e, 0x81, 0x57, 0x49, 0x00, 0x47, 0x6c, 0x55, 0x02, 0x3c}; static void gatts_profile_rgb_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param); struct gatts_profile_inst { esp_gatts_cb_t gatts_cb; uint16_t gatts_if; uint16_t app_id; uint16_t conn_id; uint16_t service_handle; esp_gatt_srvc_id_t service_id; uint16_t char_handle; esp_bt_uuid_t char_uuid; esp_gatt_perm_t perm; esp_gatt_char_prop_t property; }; /********************/ #ifdef USE_BATTERY /// battery Service static const uint16_t battary_svc = ESP_GATT_UUID_BATTERY_SERVICE_SVC; static const uint16_t bat_lev_uuid = ESP_GATT_UUID_BATTERY_LEVEL; static const uint8_t bat_lev_ccc[2] ={ 0x00, 0x00}; static const uint16_t char_format_uuid = ESP_GATT_UUID_CHAR_PRESENT_FORMAT; static uint8_t battary_lev = 50; /// Full HRS Database Description - Used to add attributes into the database static const esp_gatts_attr_db_t bas_att_db[BAS_IDX_NB] = { // Battary Service Declaration [BAS_IDX_SVC] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&primary_service_uuid, ESP_GATT_PERM_READ, sizeof(uint16_t), sizeof(battary_svc), (uint8_t *)&battary_svc}}, // Battary level Characteristic Declaration [BAS_IDX_BATT_LVL_CHAR] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_declaration_uuid, ESP_GATT_PERM_READ, sizeof(uint8_t),sizeof(uint8_t), (uint8_t *)&char_prop_read_notify}}, // Battary level Characteristic Value [BAS_IDX_BATT_LVL_VAL] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&bat_lev_uuid, ESP_GATT_PERM_READ, sizeof(uint8_t),sizeof(uint8_t), &battary_lev}}, // Battary level Characteristic - Client Characteristic Configuration Descriptor [BAS_IDX_BATT_LVL_NTF_CFG] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&character_client_config_uuid, ESP_GATT_PERM_READ|ESP_GATT_PERM_WRITE, sizeof(uint16_t),sizeof(bat_lev_ccc), (uint8_t *)bat_lev_ccc}}, // Battary level report Characteristic Declaration [BAS_IDX_BATT_LVL_PRES_FMT] = {{ESP_GATT_AUTO_RSP}, {ESP_UUID_LEN_16, (uint8_t *)&char_format_uuid, ESP_GATT_PERM_READ, sizeof(struct char_pres_fmt), 0, NULL}}, }; #endif /*******************/ /* One gatt-based profile one app_id and one gatts_if, this array will store the gatts_if returned by ESP_GATTS_REG_EVT */ static struct gatts_profile_inst gl_profile_tab[PROFILE_NUM] = { [PROFILE_RGB_APP_ID] = { .gatts_cb = gatts_profile_rgb_event_handler, .gatts_if = ESP_GATT_IF_NONE, /* Not get the gatt_if, so initial is ESP_GATT_IF_NONE */ } }; static void create_rgb_service(esp_gatt_if_t gatts_if) { gl_profile_tab[PROFILE_RGB_APP_ID].service_id.is_primary = true; gl_profile_tab[PROFILE_RGB_APP_ID].service_id.id.inst_id = 0x00; gl_profile_tab[PROFILE_RGB_APP_ID].service_id.id.uuid.len = ESP_UUID_LEN_128; memcpy(gl_profile_tab[PROFILE_RGB_APP_ID].service_id.id.uuid.uuid.uuid128, rgb_service_uuid, ESP_UUID_LEN_128); esp_ble_gatts_create_service(gatts_if, &gl_profile_tab[PROFILE_RGB_APP_ID].service_id, PROFILE_RGB_NUM_HANDLE); } static void start_rgb_service(esp_ble_gatts_cb_param_t *param) { gl_profile_tab[PROFILE_RGB_APP_ID].service_handle = param->create.service_handle; esp_ble_gatts_start_service(gl_profile_tab[PROFILE_RGB_APP_ID].service_handle); } static void add_rgb_characteristic(void) { uint8_t char_value[] = {0x00}; esp_attr_value_t rgb_char_val = { .attr_max_len = sizeof(char_value), .attr_len = sizeof(char_value), .attr_value = char_value, }; gl_profile_tab[PROFILE_RGB_APP_ID].char_uuid.len = ESP_UUID_LEN_128; memcpy(gl_profile_tab[PROFILE_RGB_APP_ID].char_uuid.uuid.uuid128, rgb_characteristic_uuid, ESP_UUID_LEN_128); esp_err_t add_char_ret = esp_ble_gatts_add_char(gl_profile_tab[PROFILE_RGB_APP_ID].service_handle, &gl_profile_tab[PROFILE_RGB_APP_ID].char_uuid, ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE, ESP_GATT_CHAR_PROP_BIT_WRITE, &rgb_char_val, NULL); if (add_char_ret){ ESP_LOGE(TAG, "add char failed, error code =%x",add_char_ret); } } static void handle_write_event(uint8_t * p_data, uint16_t len) { uint8_t opcode = p_data[0]; ESP_LOGI(TAG, "opcode = 0x%x", opcode); switch (opcode) { case 1: // rgb_ctrl(RGB_RED, RGB_ON); // rgb_ctrl(RGB_GREEN, RGB_OFF); // rgb_ctrl(RGB_BLUE, RGB_OFF); break; case 2: // rgb_ctrl(RGB_RED, RGB_OFF); // rgb_ctrl(RGB_GREEN, RGB_ON); // rgb_ctrl(RGB_BLUE, RGB_OFF); break; case 3: // rgb_ctrl(RGB_RED, RGB_OFF); // rgb_ctrl(RGB_GREEN, RGB_OFF); // rgb_ctrl(RGB_BLUE, RGB_ON); break; case 4: // rgb_ctrl(RGB_RED, RGB_OFF); // rgb_ctrl(RGB_GREEN, RGB_OFF); // rgb_ctrl(RGB_BLUE, RGB_OFF); break; default: break; } } static void gatts_profile_rgb_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param) { ESP_LOGI(TAG, "gatts_profile_rgb_event_handler()"); switch (event) { case ESP_GATTS_REG_EVT: ESP_LOGI(TAG, "REGISTER_APP_EVT, status %d, app_id %d", param->reg.status, param->reg.app_id); ble_balkon_adv_config(); create_rgb_service(gatts_if); break; case ESP_GATTS_READ_EVT: { ESP_LOGI(TAG, "GATT_READ_EVT, conn_id %d, trans_id %lu, handle %d\n", param->read.conn_id, param->read.trans_id, param->read.handle); break; } case ESP_GATTS_WRITE_EVT: { ESP_LOGI(TAG, "GATT_WRITE_EVT, conn_id %d, trans_id %lu, handle %d", param->write.conn_id, param->write.trans_id, param->write.handle); if (!param->write.is_prep){ ESP_LOGI(TAG, "GATT_WRITE_EVT, value len %d, value :", param->write.len); esp_log_buffer_hex(TAG, param->write.value, param->write.len); handle_write_event(param->write.value, param->write.len); } esp_gatt_status_t status = ESP_GATT_OK; if (param->write.need_rsp){ if (!param->write.is_prep){ esp_ble_gatts_send_response(gatts_if, param->write.conn_id, param->write.trans_id, status, NULL); } } break; } case ESP_GATTS_EXEC_WRITE_EVT: ESP_LOGI(TAG,"ESP_GATTS_EXEC_WRITE_EVT"); break; case ESP_GATTS_MTU_EVT: ESP_LOGI(TAG, "ESP_GATTS_MTU_EVT, MTU %d", param->mtu.mtu); break; case ESP_GATTS_UNREG_EVT: break; case ESP_GATTS_CREATE_EVT: ESP_LOGI(TAG, "CREATE_SERVICE_EVT, status %d, service_handle %d", param->create.status, param->create.service_handle); start_rgb_service(param); add_rgb_characteristic(); break; case ESP_GATTS_ADD_INCL_SRVC_EVT: break; case ESP_GATTS_ADD_CHAR_EVT: { ESP_LOGI(TAG, "ADD_CHAR_EVT, status %d, attr_handle %d, service_handle %d", param->add_char.status, param->add_char.attr_handle, param->add_char.service_handle); break; } case ESP_GATTS_ADD_CHAR_DESCR_EVT: ESP_LOGI(TAG, "ADD_DESCR_EVT, status %d, attr_handle %d, service_handle %d", param->add_char_descr.status, param->add_char_descr.attr_handle, param->add_char_descr.service_handle); break; case ESP_GATTS_DELETE_EVT: break; case ESP_GATTS_START_EVT: ESP_LOGI(TAG, "SERVICE_START_EVT, status %d, service_handle %d", param->start.status, param->start.service_handle); break; case ESP_GATTS_STOP_EVT: break; case ESP_GATTS_CONNECT_EVT: { esp_ble_conn_update_params_t conn_params = {0}; memcpy(conn_params.bda, param->connect.remote_bda, sizeof(esp_bd_addr_t)); /* For the IOS system, please reference the apple official documents about the ble connection parameters restrictions. */ conn_params.latency = 0; conn_params.max_int = 0x20; // max_int = 0x20*1.25ms = 40ms conn_params.min_int = 0x10; // min_int = 0x10*1.25ms = 20ms conn_params.timeout = 400; // timeout = 400*10ms = 4000ms ESP_LOGI(TAG, "ESP_GATTS_CONNECT_EVT, conn_id %d, remote %02x:%02x:%02x:%02x:%02x:%02x:", param->connect.conn_id, param->connect.remote_bda[0], param->connect.remote_bda[1], param->connect.remote_bda[2], param->connect.remote_bda[3], param->connect.remote_bda[4], param->connect.remote_bda[5]); gl_profile_tab[PROFILE_RGB_APP_ID].conn_id = param->connect.conn_id; //start sent the update connection parameters to the peer device. esp_ble_gap_update_conn_params(&conn_params); break; } case ESP_GATTS_DISCONNECT_EVT: ESP_LOGI(TAG, "ESP_GATTS_DISCONNECT_EVT, disconnect reason 0x%x", param->disconnect.reason); ble_balkon_adv_start(); break; case ESP_GATTS_CONF_EVT: ESP_LOGI(TAG, "ESP_GATTS_CONF_EVT, status %d attr_handle %d", param->conf.status, param->conf.handle); if (param->conf.status != ESP_GATT_OK){ esp_log_buffer_hex(TAG, param->conf.value, param->conf.len); } break; case ESP_GATTS_OPEN_EVT: case ESP_GATTS_CANCEL_OPEN_EVT: case ESP_GATTS_CLOSE_EVT: case ESP_GATTS_LISTEN_EVT: case ESP_GATTS_CONGEST_EVT: default: break; } } static void gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param) { ESP_LOGI(TAG, "gatts_event_handler(%x)", event); /* If event is register event, store the gatts_if for each profile */ if (event == ESP_GATTS_REG_EVT) { if (param->reg.status == ESP_GATT_OK) { gl_profile_tab[param->reg.app_id].gatts_if = gatts_if; } else { ESP_LOGI(TAG, "Reg app failed, app_id %04x, status %d", param->reg.app_id, param->reg.status); return; } } /* If the gatts_if equal to profile A, call profile A cb handler, * so here call each profile's callback */ do { int idx; for (idx = 0; idx < PROFILE_NUM; idx++) { if (gatts_if == ESP_GATT_IF_NONE || /* ESP_GATT_IF_NONE, not specify a certain gatt_if, need to call every profile cb function */ gatts_if == gl_profile_tab[idx].gatts_if) { if (gl_profile_tab[idx].gatts_cb) { gl_profile_tab[idx].gatts_cb(event, gatts_if, param); } } } } while (0); } /***************************************************************************************************************************/ esp_err_t ble_balkon_gatts_register(void) { esp_err_t ret = esp_ble_gatts_register_callback(gatts_event_handler); if (ret){ ESP_LOGE(TAG, "gatts register error, error code = %x", ret); } return ret; } esp_err_t ble_balkon_gatts_app_register(void) { esp_err_t ret = esp_ble_gatts_app_register(PROFILE_RGB_APP_ID); if (ret){ ESP_LOGE(TAG, "gatts app register error, error code = %x", ret); } return ret; } esp_err_t ble_balkon_gatts_set_mtu(void) { esp_err_t local_mtu_ret = esp_ble_gatt_set_local_mtu(500); if (local_mtu_ret){ ESP_LOGE(TAG, "set local MTU failed, error code = %x", local_mtu_ret); } return local_mtu_ret; }
