diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..e6bb0725
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,8 @@
+# Note
+
+During the pre-alpha stage, contributions will not yet be considered.
+
+# Code Style
+
+See [github.com/MaJerle/c-code-style](https://github.com/MaJerle/c-code-style).
+
diff --git a/components/board_2432s024/board_2432s024_display.c b/components/board_2432s024/board_2432s024_display.c
index c2b5fca1..a4653457 100644
--- a/components/board_2432s024/board_2432s024_display.c
+++ b/components/board_2432s024/board_2432s024_display.c
@@ -26,13 +26,13 @@ static SemaphoreHandle_t refresh_finish = NULL;
 #define BITS_PER_PIXEL 16
 #define DRAW_BUFFER_HEIGHT 80
 
-IRAM_ATTR static bool test_notify_refresh_ready(esp_lcd_panel_io_handle_t io_handle, esp_lcd_panel_io_event_data_t* edata, void* user_ctx) {
+IRAM_ATTR static bool prv_on_color_trans_done(esp_lcd_panel_io_handle_t io_handle, esp_lcd_panel_io_event_data_t* edata, void* user_ctx) {
     BaseType_t need_yield = pdFALSE;
     xSemaphoreGiveFromISR(refresh_finish, &need_yield);
     return (need_yield == pdTRUE);
 }
 
-static esp_err_t ili9341_create_display(nb_display_t* display) {
+static esp_err_t prv_create_display(nb_display_t* display) {
     ESP_LOGI(TAG, "init started");
 
     gpio_config_t io_conf = {
@@ -59,7 +59,7 @@ static esp_err_t ili9341_create_display(nb_display_t* display) {
     const esp_lcd_panel_io_spi_config_t panel_io_config = ILI9341_PANEL_IO_SPI_CONFIG(
         PIN_CS,
         PIN_DC,
-        test_notify_refresh_ready,
+        prv_on_color_trans_done,
         NULL
     );
 
@@ -117,7 +117,7 @@ static esp_err_t ili9341_create_display(nb_display_t* display) {
 nb_display_driver_t board_2432s024_create_display_driver() {
     nb_display_driver_t driver = {
         .name = "ili9341_2432s024",
-        .create_display = &ili9341_create_display
+        .create_display = &prv_create_display
     };
     return driver;
 }
diff --git a/components/board_2432s024/board_2432s024_touch.c b/components/board_2432s024/board_2432s024_touch.c
index 36092522..59c23f3a 100644
--- a/components/board_2432s024/board_2432s024_touch.c
+++ b/components/board_2432s024/board_2432s024_touch.c
@@ -9,7 +9,7 @@
 
 const char* TAG = "cst816";
 
-static esp_err_t cst816_init_io(esp_lcd_panel_io_handle_t* io_handle) {
+static esp_err_t prv_init_io(esp_lcd_panel_io_handle_t* io_handle) {
     // Init I2C
     const i2c_config_t i2c_conf = {
         .mode = I2C_MODE_MASTER,
@@ -29,7 +29,7 @@ static esp_err_t cst816_init_io(esp_lcd_panel_io_handle_t* io_handle) {
     return ESP_OK;
 }
 
-static esp_err_t cst816_create_touch(esp_lcd_panel_io_handle_t io_handle, esp_lcd_touch_handle_t* touch_handle) {
+static esp_err_t prv_create_touch(esp_lcd_panel_io_handle_t io_handle, esp_lcd_touch_handle_t* touch_handle) {
     // Configure touch
     esp_lcd_touch_config_t config = {
         .x_max = 240,
@@ -55,8 +55,8 @@ static esp_err_t cst816_create_touch(esp_lcd_panel_io_handle_t io_handle, esp_lc
 nb_touch_driver_t board_2432s024_create_touch_driver() {
     nb_touch_driver_t driver = {
         .name = "cst816s_2432s024",
-        .init_io = cst816_init_io,
-        .create_touch = &cst816_create_touch
+        .init_io = prv_init_io,
+        .create_touch = &prv_create_touch
     };
     return driver;
 }
diff --git a/components/nanobake/src/nb_platform.c b/components/nanobake/src/nb_platform.c
index f71d1144..122d7450 100644
--- a/components/nanobake/src/nb_platform.c
+++ b/components/nanobake/src/nb_platform.c
@@ -8,7 +8,7 @@
 
 static const char* TAG = "nb_platform";
 
-static esp_err_t prv_nb_lvgl_init(
+static esp_err_t prv_lvgl_init(
     nb_platform_t* platform
 ) {
     const lvgl_port_cfg_t lvgl_cfg = {
@@ -71,7 +71,7 @@ esp_err_t nb_platform_create(nb_platform_config_t config, nb_platform_t* platfor
     );
 
     ESP_RETURN_ON_ERROR(
-        prv_nb_lvgl_init(platform),
+        prv_lvgl_init(platform),
         nbi_tag,
         "lvgl init failed"
     );
diff --git a/main/main.c b/main/main.c
index 0943d426..267e4a2c 100644
--- a/main/main.c
+++ b/main/main.c
@@ -1,8 +1,8 @@
 #include <esp_err.h>
 #include <esp_log.h>
-#include <esp_check.h>
 
 #include <nanobake.h>
+
 // Nanobake board support with drivers:
 #include <board_2432s024_touch.h>
 #include <board_2432s024_display.h>