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/*
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.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 "esp_bt_main.h"
#include "esp_bt_device.h"
#include "esp_gap_bt_api.h"
#include "esp_hf_client_api.h"
#include "bt_app_hf.h"
#include "gpio_pcm_config.h"
#include "esp_console.h"
#include "app_hf_msg_set.h"
esp_bd_addr_t peer_addr = {0};
static char peer_bdname[ESP_BT_GAP_MAX_BDNAME_LEN + 1];
static uint8_t peer_bdname_len;
static const char remote_device_name[] = CONFIG_EXAMPLE_PEER_DEVICE_NAME;
static char *bda2str(esp_bd_addr_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 bool get_name_from_eir(uint8_t *eir, char *bdname, uint8_t *bdname_len)
{
uint8_t *rmt_bdname = NULL;
uint8_t rmt_bdname_len = 0;
if (!eir) {
return false;
}
rmt_bdname = esp_bt_gap_resolve_eir_data(eir, ESP_BT_EIR_TYPE_CMPL_LOCAL_NAME, &rmt_bdname_len);
if (!rmt_bdname) {
rmt_bdname = esp_bt_gap_resolve_eir_data(eir, ESP_BT_EIR_TYPE_SHORT_LOCAL_NAME, &rmt_bdname_len);
}
if (rmt_bdname) {
if (rmt_bdname_len > ESP_BT_GAP_MAX_BDNAME_LEN) {
rmt_bdname_len = ESP_BT_GAP_MAX_BDNAME_LEN;
}
if (bdname) {
memcpy(bdname, rmt_bdname, rmt_bdname_len);
bdname[rmt_bdname_len] = '\0';
}
if (bdname_len) {
*bdname_len = rmt_bdname_len;
}
return true;
}
return false;
}
void esp_bt_gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param)
{
switch (event) {
case ESP_BT_GAP_DISC_RES_EVT: {
for (int i = 0; i < param->disc_res.num_prop; i++){
if (param->disc_res.prop[i].type == ESP_BT_GAP_DEV_PROP_EIR
&& get_name_from_eir(param->disc_res.prop[i].val, peer_bdname, &peer_bdname_len)){
if (strcmp(peer_bdname, remote_device_name) == 0) {
memcpy(peer_addr, param->disc_res.bda, ESP_BD_ADDR_LEN);
ESP_LOGI(BT_HF_TAG, "Found a target device address:");
ESP_LOG_BUFFER_HEX(BT_HF_TAG, peer_addr, ESP_BD_ADDR_LEN);
ESP_LOGI(BT_HF_TAG, "Found a target device name: %s", peer_bdname);
printf("Connect.\n");
esp_hf_client_connect(peer_addr);
esp_bt_gap_cancel_discovery();
}
}
}
break;
}
case ESP_BT_GAP_DISC_STATE_CHANGED_EVT:
ESP_LOGI(BT_HF_TAG, "ESP_BT_GAP_DISC_STATE_CHANGED_EVT");
case ESP_BT_GAP_RMT_SRVCS_EVT:
case ESP_BT_GAP_RMT_SRVC_REC_EVT:
break;
case ESP_BT_GAP_AUTH_CMPL_EVT: {
if (param->auth_cmpl.stat == ESP_BT_STATUS_SUCCESS) {
ESP_LOGI(BT_HF_TAG, "authentication success: %s", param->auth_cmpl.device_name);
ESP_LOG_BUFFER_HEX(BT_HF_TAG, param->auth_cmpl.bda, ESP_BD_ADDR_LEN);
} else {
ESP_LOGE(BT_HF_TAG, "authentication failed, status:%d", param->auth_cmpl.stat);
}
break;
}
case ESP_BT_GAP_PIN_REQ_EVT: {
ESP_LOGI(BT_HF_TAG, "ESP_BT_GAP_PIN_REQ_EVT min_16_digit:%d", param->pin_req.min_16_digit);
if (param->pin_req.min_16_digit) {
ESP_LOGI(BT_HF_TAG, "Input pin code: 0000 0000 0000 0000");
esp_bt_pin_code_t pin_code = {0};
esp_bt_gap_pin_reply(param->pin_req.bda, true, 16, pin_code);
} else {
ESP_LOGI(BT_HF_TAG, "Input pin code: 1234");
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_pin_reply(param->pin_req.bda, true, 4, pin_code);
}
break;
}
#if (CONFIG_EXAMPLE_SSP_ENABLED == true)
case ESP_BT_GAP_CFM_REQ_EVT:
ESP_LOGI(BT_HF_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;
case ESP_BT_GAP_KEY_NOTIF_EVT:
ESP_LOGI(BT_HF_TAG, "ESP_BT_GAP_KEY_NOTIF_EVT passkey:%"PRIu32, param->key_notif.passkey);
break;
case ESP_BT_GAP_KEY_REQ_EVT:
ESP_LOGI(BT_HF_TAG, "ESP_BT_GAP_KEY_REQ_EVT Please enter passkey!");
break;
#endif
case ESP_BT_GAP_MODE_CHG_EVT:
ESP_LOGI(BT_HF_TAG, "ESP_BT_GAP_MODE_CHG_EVT mode:%d", param->mode_chg.mode);
break;
default: {
ESP_LOGI(BT_HF_TAG, "event: %d", event);
break;
}
}
return;
}
/* event for handler "bt_av_hdl_stack_up */
enum {
BT_APP_EVT_STACK_UP = 0,
};
/* handler for bluetooth stack enabled events */
static void bt_hf_client_hdl_stack_evt(uint16_t event, void *p_param);
void app_main(void)
{
char bda_str[18] = {0};
/* Initialize NVS — it is used to store PHY calibration data */
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK( ret );
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 ((ret = esp_bt_controller_init(&bt_cfg)) != ESP_OK) {
ESP_LOGE(BT_HF_TAG, "%s initialize controller failed: %s", __func__, esp_err_to_name(ret));
return;
}
if ((ret = esp_bt_controller_enable(ESP_BT_MODE_CLASSIC_BT)) != ESP_OK) {
ESP_LOGE(BT_HF_TAG, "%s enable controller failed: %s", __func__, esp_err_to_name(ret));
return;
}
esp_bluedroid_config_t bluedroid_cfg = BT_BLUEDROID_INIT_CONFIG_DEFAULT();
#if (CONFIG_EXAMPLE_SSP_ENABLED == false)
bluedroid_cfg.ssp_en = false;
#endif
if ((ret = esp_bluedroid_init_with_cfg(&bluedroid_cfg)) != ESP_OK) {
ESP_LOGE(BT_HF_TAG, "%s initialize bluedroid failed: %s", __func__, esp_err_to_name(ret));
return;
}
if ((ret = esp_bluedroid_enable()) != ESP_OK) {
ESP_LOGE(BT_HF_TAG, "%s enable bluedroid failed: %s", __func__, esp_err_to_name(ret));
return;
}
ESP_LOGI(BT_HF_TAG, "Own address:[%s]", bda2str((uint8_t *)esp_bt_dev_get_address(), bda_str, sizeof(bda_str)));
/* create application task */
bt_app_task_start_up();
/* Bluetooth device name, connection mode and profile set up */
bt_app_work_dispatch(bt_hf_client_hdl_stack_evt, BT_APP_EVT_STACK_UP, NULL, 0, NULL);
#if CONFIG_BT_HFP_AUDIO_DATA_PATH_PCM
/* configure the PCM interface and PINs used */
app_gpio_pcm_io_cfg();
#endif
/* configure external chip for acoustic echo cancellation */
#if ACOUSTIC_ECHO_CANCELLATION_ENABLE
app_gpio_aec_io_cfg();
#endif /* ACOUSTIC_ECHO_CANCELLATION_ENABLE */
esp_console_repl_t *repl = NULL;
esp_console_repl_config_t repl_config = ESP_CONSOLE_REPL_CONFIG_DEFAULT();
esp_console_dev_uart_config_t uart_config = ESP_CONSOLE_DEV_UART_CONFIG_DEFAULT();
repl_config.prompt = "hfp_hf>";
// init console REPL environment
ESP_ERROR_CHECK(esp_console_new_repl_uart(&uart_config, &repl_config, &repl));
/* Register commands */
register_hfp_hf();
printf("\n ==================================================\n");
printf(" | Steps to test hfp_hf |\n");
printf(" | |\n");
printf(" | 1. Print 'help' to gain overview of commands |\n");
printf(" | 2. Setup a service level connection |\n");
printf(" | 3. Run hfp_hf to test |\n");
printf(" | |\n");
printf(" =================================================\n\n");
// start console REPL
ESP_ERROR_CHECK(esp_console_start_repl(repl));
}
static void bt_hf_client_hdl_stack_evt(uint16_t event, void *p_param)
{
ESP_LOGD(BT_HF_TAG, "%s evt %d", __func__, event);
switch (event) {
case BT_APP_EVT_STACK_UP: {
/* set up device name */
char *dev_name = "ESP_HFP_HF";
esp_bt_gap_set_device_name(dev_name);
/* register GAP callback function */
esp_bt_gap_register_callback(esp_bt_gap_cb);
esp_hf_client_register_callback(bt_app_hf_client_cb);
esp_hf_client_init();
#if (CONFIG_EXAMPLE_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
esp_bt_pin_type_t pin_type = ESP_BT_PIN_TYPE_FIXED;
esp_bt_pin_code_t pin_code;
pin_code[0] = '0';
pin_code[1] = '0';
pin_code[2] = '0';
pin_code[3] = '0';
esp_bt_gap_set_pin(pin_type, 4, pin_code);
/* set discoverable and connectable mode, wait to be connected */
esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
/* start device discovery */
ESP_LOGI(BT_HF_TAG, "Starting device discovery...");
esp_bt_gap_start_discovery(ESP_BT_INQ_MODE_GENERAL_INQUIRY, 10, 0);
break;
}
default:
ESP_LOGE(BT_HF_TAG, "%s unhandled evt %d", __func__, event);
break;
}
}
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