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

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;
+    }
+}