Add support for ILI948x displays (ILI9486 / ILI9488)

CMakeLists.txt

@@ -31,6 +31,7 @@ idf_component_register(SRCS
     "display_driver.c"
     "5in65_acep_7c_display_driver.c"
     "ili934x_display_driver.c"
+    "ili948x_display_driver.c"
     "memory_display_driver.c"
     "ssd1306_display_driver.c"
     "st7789_display_driver.c"

README.Md

@@ -81,6 +81,8 @@ that would otherwise be impossible to support with traditional frame buffer appr
 ## Supported Hardware
 
 * `ilitek,ili9341` / `ilitek,ili9342c`: ILI9341 / ILI9342C - 240x320, 16-bit colors
+* `ilitek,ili9486`: ILI9486 - 320x480, 16-bit colors (RGB565)
+* `ilitek,ili9488`: ILI9488 - 320x480, 18-bit colors (RGB666 over SPI; 3 bytes/pixel transfer)
 * `waveshare,5in65-acep-7c`: Waveshare 7-color 5.65" ACeP display module - 600x480, 7 colors +
 software dithering
 * `sharp,memory-lcd`: Sharp Memory LCDs - 400x240, 1-bit monochrome

display_driver.c

@@ -31,6 +31,7 @@ static const char *TAG = "display_driver";
 
 Context *acep_5in65_7c_display_driver_create_port(GlobalContext *global, term opts);
 Context *ili934x_display_create_port(GlobalContext *global, term opts);
+Context *ili948x_display_create_port(GlobalContext *global, term opts);
 Context *memory_lcd_display_create_port(GlobalContext *global, term opts);
 Context *ssd1306_display_create_port(GlobalContext *global, term opts);
 Context *st7789_display_create_port(GlobalContext *global, term opts);
@@ -60,6 +61,10 @@ Context *display_create_port(GlobalContext *global, term opts)
         ctx = ili934x_display_create_port(global, opts);
     } else if (!strcmp(compat_string, "ilitek,ili9342c")) {
         ctx = ili934x_display_create_port(global, opts);
+    } else if (!strcmp(compat_string, "ilitek,ili9486")) {
+        ctx = ili948x_display_create_port(global, opts);
+    } else if (!strcmp(compat_string, "ilitek,ili9488")) {
+        ctx = ili948x_display_create_port(global, opts);
     } else if (!strcmp(compat_string, "solomon-systech,ssd1306")) {
         ctx = ssd1306_display_create_port(global, opts);
     } else if (!strcmp(compat_string, "sino-wealth,sh1106")) {

docs/display-drivers.md

@@ -136,6 +136,46 @@ ili9341_opts = [
 ]
 ```
 
+### ILI9486 / ILI9488 (ilitek,ili9486 / ilitek,ili9488)
+
+320×480 TFT displays.
+
+- **ILI9486**: RGB565 over SPI (16-bit color)
+- **ILI9488**: RGB666 over SPI (18-bit color; transferred as 3 bytes/pixel). AtomGL renders in RGB565 and converts scanlines for transfer.
+
+**Compatible strings:** `"ilitek,ili9486"` or `"ilitek,ili9488"`
+
+| Option | Type | Description | Default |
+|--------|------|-------------|---------|
+| `spi_host` | term | SPI host reference | Required |
+| `width` | integer | Display width in pixels (kept for API consistency) | 320 |
+| `height` | integer | Display height in pixels (kept for API consistency) | 480 |
+| `cs` | integer | Chip select GPIO pin | Required |
+| `dc` | integer | Data/Command GPIO pin | Required |
+| `reset` | integer | Reset GPIO pin | Required |
+| `rotation` | integer | Display rotation (0-3) | 0 |
+| `enable_tft_invon` | boolean | Enable color inversion | false |
+| `color_order` | atom | Color order (:bgr/:rgb) | :bgr |
+| `backlight` | integer | Backlight GPIO pin | Optional |
+| `backlight_active` | atom | Backlight active level (:low/:high) | Optional |
+| `backlight_enabled` | boolean | Enable backlight on init | Optional |
+
+**Example:**
+```elixir
+ili948x_opts = [
+  spi_host: spi_host,
+  compatible: "ilitek,ili9488",
+  width: 320,
+  height: 480,
+  cs: 22,
+  dc: 21,
+  reset: 18,
+  rotation: 1,
+  enable_tft_invon: false,
+  color_order: :bgr
+]
+```
+
 ### ST7789 / ST7796 (sitronix,st7789 / sitronix,st7796)
 
 TFT displays with 16-bit colors.