CI: Initial.

Signed-off-by: Yilin Sun <imi415@imi.moe>

.drone.yml

@@ -0,0 +1,15 @@
+---
+kind: pipeline
+type: docker
+name: Build
+
+steps:
+  - name: Submodules
+    image: alpine/git
+    commands:
+      - git submodule update --init --recursive
+
+  - name: IDF Build
+    image: "espressif/idf:v5.0"
+    commands:
+      - bash -c ". $IDF_PATH/export.sh && idf.py build && idf.py size-components"

README.md

@@ -1,53 +1,2 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-H4 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | -------- |
+# Playground project for LuaT ESP32-S3
 
-# Hello World Example
-
-Starts a FreeRTOS task to print "Hello World".
-
-(See the README.md file in the upper level 'examples' directory for more information about examples.)
-
-## How to use example
-
-Follow detailed instructions provided specifically for this example.
-
-Select the instructions depending on Espressif chip installed on your development board:
-
-- [ESP32 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/index.html)
-- [ESP32-S2 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html)
-
-
-## Example folder contents
-
-The project **hello_world** contains one source file in C language [hello_world_main.c](main/hello_world_main.c). The file is located in folder [main](main).
-
-ESP-IDF projects are built using CMake. The project build configuration is contained in `CMakeLists.txt` files that provide set of directives and instructions describing the project's source files and targets (executable, library, or both).
-
-Below is short explanation of remaining files in the project folder.
-
-```
-├── CMakeLists.txt
-├── pytest_hello_world.py      Python script used for automated testing
-├── main
-│   ├── CMakeLists.txt
-│   └── hello_world_main.c
-└── README.md                  This is the file you are currently reading
-```
-
-For more information on structure and contents of ESP-IDF projects, please refer to Section [Build System](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html) of the ESP-IDF Programming Guide.
-
-## Troubleshooting
-
-* Program upload failure
-
-    * Hardware connection is not correct: run `idf.py -p PORT monitor`, and reboot your board to see if there are any output logs.
-    * The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
-
-## Technical support and feedback
-
-Please use the following feedback channels:
-
-* For technical queries, go to the [esp32.com](https://esp32.com/) forum
-* For a feature request or bug report, create a [GitHub issue](https://github.com/espressif/esp-idf/issues)
-
-We will get back to you as soon as possible.

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "hello_world_main.c"
+idf_component_register(SRCS "main.c"
                     INCLUDE_DIRS "")

main/hello_world_main.c

@@ -1,13 +0,0 @@
-#include <inttypes.h>
-#include <stdio.h>
-
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-
-void app_main(void) {
-    printf("Hello world!\n");
-
-    for (;;) {
-        vTaskSuspend(NULL);
-    }
-}

main/main.c

@@ -0,0 +1,35 @@
+#include <inttypes.h>
+#include <stdio.h>
+
+/* FreeRTOS */
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+/* ESP */
+#include "driver/gpio.h"
+#include "esp_log.h"
+
+#define LED0_PIN 10
+
+static const char *LOG_TAG = "MAIN";
+
+void app_main(void) {
+    ESP_LOGI(LOG_TAG, "Hello world");
+
+    gpio_config_t led_cfg = {
+        .pin_bit_mask = (1U << LED0_PIN),
+        .mode         = GPIO_MODE_OUTPUT,
+        .intr_type    = GPIO_INTR_DISABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .pull_up_en   = GPIO_PULLUP_DISABLE,
+    };
+
+    gpio_config(&led_cfg);
+
+    for (;;) {
+        gpio_set_level(LED0_PIN, 1);
+        vTaskDelay(pdMS_TO_TICKS(50));
+        gpio_set_level(LED0_PIN, 0);
+        vTaskDelay(pdMS_TO_TICKS(950));
+    }
+}

sdkconfig.defaults

@@ -1,9 +1,11 @@
-# This file was generated using idf.py save-defconfig. It can be edited manually.
-# Espressif IoT Development Framework (ESP-IDF) Project Minimal Configuration
-#
+# Target is ESP32-S3
 CONFIG_IDF_TARGET="esp32s3"
+
+# External QSPI flash (1.8V)
 CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
 CONFIG_ESPTOOLPY_FLASHSIZE_16MB=y
+
+# Internal SiP SPI PSRAM (1.8V)
 CONFIG_SPIRAM=y
 CONFIG_SPIRAM_MODE_OCT=y
 CONFIG_SPIRAM_SPEED_80M=y