app: init commit

Author: redchenjs

.gitignore

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+*
+.*

.gitmodules

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+[submodule "esp-idf"]
+	path = esp-idf
+	url = https://github.com/espressif/esp-idf

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+
+set(SUPPORTED_TARGETS esp32)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(bluetooth_uart_hci_controller)

README.md

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+Bluetooth UART HCI Controller
+=============================
+
+BTDM controller inside the ESP32 chip, use UART(H4) as HCI IO.
+
+## Pinmap
+
+| HCI IO | TX | RX | CTS | RTS |
+| :----: | -: | -: | --: | --: |
+|    Pin |  5 | 18 |  19 |  23 |
+
+## Preparing
+
+### Obtain the Source
+
+```
+git clone --recursive https://github.com/redchenjs/bluetooth_uart_hci_controller_esp32.git
+```
+
+### Update an existing repository
+
+```
+git pull
+git submodule update --init --recursive
+```
+
+### Setup the Tools
+
+```
+./esp-idf/install.sh
+```
+
+## Building
+
+### Setup the environment variables
+
+```
+export IDF_PATH=$PWD/esp-idf
+source ./esp-idf/export.sh
+```
+
+### Flash & Monitor
+
+```
+idf.py flash monitor
+```

esp-idf

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+set(COMPONENT_SRCDIRS .)
+
+register_component()

main/CMakeLists.txt

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+/*
+ * app_main.c
+ *
+ *  Created on: 2020-02-01 23:25
+ *      Author: Jack Chen <redchenjs@live.com>
+ */
+
+#include "esp_bt.h"
+#include "esp_log.h"
+
+#include "nvs_flash.h"
+
+#include "driver/uart.h"
+#include "soc/uhci_periph.h"
+#include "driver/periph_ctrl.h"
+
+#define NVS_TAG "nvs"
+#define BT_TAG  "bt"
+
+int app_main(void)
+{
+    esp_err_t 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);
+
+    ESP_LOGI(NVS_TAG, "initialized.");
+
+    periph_module_enable(PERIPH_UART1_MODULE);
+    periph_module_enable(PERIPH_UHCI0_MODULE);
+
+    uart_set_pin(UART_NUM_1, 5, 18, 19, 23);
+
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ESP_ERROR_CHECK(esp_bt_controller_init(&bt_cfg));
+    ESP_ERROR_CHECK(esp_bt_controller_enable(ESP_BT_MODE_BTDM));
+
+    ESP_LOGI(BT_TAG, "initialized, tx: 5, rx: 18, cts: 23, rts: 19");
+
+    return 0;
+}

main/app_main.c

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+#
+# Serial flasher config
+#
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHFREQ_80M=y
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+
+#
+# Bluetooth
+#
+CONFIG_BT_ENABLED=y
+CONFIG_BTDM_CTRL_MODE_BTDM=y
+CONFIG_BTDM_CTRL_BR_EDR_SCO_DATA_PATH_HCI=y
+CONFIG_BTDM_CTRL_AUTO_LATENCY=y
+CONFIG_BTDM_CTRL_HCI_MODE_UART_H4=y
+
+#
+# Compiler options
+#
+CONFIG_COMPILER_OPTIMIZATION_SIZE=y
+
+#
+# ESP32-specific
+#
+CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
+
+#
+# Power Management
+#
+CONFIG_PM_ENABLE=y
+CONFIG_PM_DFS_INIT_AUTO=y
+
+#
+# Newlib
+#
+CONFIG_NEWLIB_NANO_FORMAT=y