controller_hci_uart: rename the example with suffix "_esp32" to differentiate with that of ESP32-C3

examples/bluetooth/hci/controller_hci_uart_esp32/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's CMakeLists
+# in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(controller_hci_uart)

examples/bluetooth/hci/controller_hci_uart_esp32/Makefile

@@ -0,0 +1,8 @@
+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := controller_hci_uart
+
+include $(IDF_PATH)/make/project.mk

examples/bluetooth/hci/controller_hci_uart_esp32/README.md

@@ -0,0 +1,10 @@
+| Supported Targets | ESP32 |
+| ----------------- | ----- |
+
+ESP-IDF UART HCI Controller
+===========================
+
+This is a btdm controller use UART as HCI IO. This require the UART device support RTS/CTS mandatory.
+It can do the configuration of UART number and UART baudrate by menuconfig.
+
+

examples/bluetooth/hci/controller_hci_uart_esp32/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "controller_hci_uart_demo.c"
+                    INCLUDE_DIRS ".")

examples/bluetooth/hci/controller_hci_uart_esp32/main/component.mk

@@ -0,0 +1,4 @@
+#
+# "main" pseudo-component makefile.
+#
+# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)

examples/bluetooth/hci/controller_hci_uart_esp32/main/controller_hci_uart_demo.c

@@ -0,0 +1,64 @@
+/*
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "nvs_flash.h"
+#include "esp_bt.h"
+#include "soc/uhci_periph.h"
+#include "driver/uart.h"
+#include "driver/periph_ctrl.h"
+#include "esp_log.h"
+
+static const char *tag = "CONTROLLER_UART_HCI";
+
+static void uart_gpio_reset(void)
+{
+#if CONFIG_BTDM_CTRL_HCI_UART_NO == 1
+    periph_module_enable(PERIPH_UART1_MODULE);
+#elif CONFIG_BTDM_CTRL_HCI_UART_NO == 2
+    periph_module_enable(PERIPH_UART2_MODULE);
+#endif
+    periph_module_enable(PERIPH_UHCI0_MODULE);
+
+#ifdef CONFIG_BTDM_CTRL_HCI_UART_NO
+    ESP_LOGI(tag, "HCI UART%d Pin select: TX 5, RX, 18, CTS 23, RTS 19", CONFIG_BTDM_CTRL_HCI_UART_NO);
+
+    uart_set_pin(CONFIG_BTDM_CTRL_HCI_UART_NO, 5, 18, 19, 23);
+#endif
+}
+
+void app_main(void)
+{
+    esp_err_t ret;
+
+    /* Initialize NVS — it is used to store PHY calibration data */
+    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();
+    }
+    ESP_ERROR_CHECK( ret );
+
+
+    /* As the UART1/2 pin conflict with flash pin, so do matrix of the signal and pin */
+    uart_gpio_reset();
+
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret != ESP_OK) {
+        ESP_LOGE(tag, "Bluetooth Controller initialize failed: %s", esp_err_to_name(ret));
+        return;
+    }
+
+    ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
+    if (ret != ESP_OK) {
+        ESP_LOGE(tag, "Bluetooth Controller initialize failed: %s", esp_err_to_name(ret));
+        return;
+    }
+}

examples/bluetooth/hci/controller_hci_uart_esp32/sdkconfig.defaults

@@ -0,0 +1,19 @@
+# Override some defaults so BT stack is enabled
+# in this example
+
+#
+# BT config
+#
+CONFIG_BT_ENABLED=y
+CONFIG_BTDM_CTRL_MODE_BLE_ONLY=n
+CONFIG_BTDM_CTRL_MODE_BR_EDR_ONLY=n
+CONFIG_BTDM_CTRL_MODE_BTDM=y
+CONFIG_BTDM_CTRL_BLE_MAX_CONN=9
+CONFIG_BTDM_CTRL_BR_EDR_MAX_ACL_CONN=7
+CONFIG_BTDM_CTRL_BR_EDR_MAX_SYNC_CONN=3
+CONFIG_BT_BLUEDROID_ENABLED=n
+CONFIG_BT_CONTROLLER_ONLY=y
+CONFIG_BTDM_CTRL_HCI_MODE_UART_H4=y
+CONFIG_BTDM_CTRL_HCI_UART_NO=1
+CONFIG_BTDM_CTRL_HCI_UART_BAUDRATE=921600
+CONFIG_BTDM_CTRL_MODEM_SLEEP=n