Initial commit.

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

.clang-format

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+BasedOnStyle: Google
+IndentWidth: 4
+AlignConsecutiveMacros: Consecutive
+AlignConsecutiveDeclarations: Consecutive
+AlignConsecutiveAssignments: Consecutive
+AllowShortFunctionsOnASingleLine: None
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterEnum: false
+  AfterStruct: false
+  SplitEmptyFunction: false
+ColumnLimit: 120

.drone.yml

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

.gitignore

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+/assets/.~lock*
+/build
+/cmake-build-*
+/sdkconfig
+/sdkconfig.old

CMakeLists.txt

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+# 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 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(hello_world)

README.md

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+# ESP32 OLED
+
+SDA: Pin 5
+SCL: Pin 4

main/CMakeLists.txt

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+idf_component_register(SRCS "main.c"
+                    INCLUDE_DIRS "")

main/main.c

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+/* FreeRTOS */
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+/* IDF components */
+#include "esp_log.h"
+
+static const char *LOG_TAG = "MAIN";
+
+void app_main(void) {
+    ESP_LOGI(LOG_TAG, "Hello world!");
+
+    for (;;) {
+        vTaskSuspend(NULL);
+    }
+}

sdkconfig.defaults

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+# Default target type
+CONFIG_IDF_TARGET="esp32"
+
+# Flash: 4MB QSPI
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y