Driver for ILI9341 TFT LCD display.

• Datasheet

The ILI9341 is a single-chip driver for 240x320 TFT displays, featuring 262,144 colors. It integrates a source and gate driver, as well as an internal GRAM for storing display data. The controller supports multiple interfaces, including parallel (8-/9-/16-/18-bit) and serial (3-/4-line SPI), making it suitable for a wide range of microcontrollers. The driver's ability to update specific windowed areas of the screen allows for efficient, partial redraws, which is ideal for portable devices where power consumption is a key concern.

The display is available as a module for DIY projects from various manufacturers, such as SparkFun, DfRobot or AliExpress.

An ILI9341 driver enables the following functionalities:

• Detect and initialize the display (TBD).
• Configure various interface modes, such as SPI, RGB (TBD) or parallel.
• Define a display window for selective, high-speed updates.
• Write pixel data to the internal GRAM.

Add ili9341 as a dependency to your crate with Alire:

alr with ili9341

The driver implements two usage models: the generic package, which is more convenient when dealing with a single sensor, and the tagged type, which allows easy creation of objects for any number of sensors and uniform handling.

Generic instantiation looks like this:

declare
   package TFT is new ILI9341.Bus_16_II
     (Command => System'To_Address (16#6C00_0000#),
      Data    => System'To_Address (16#6C00_0080#));

   VRAM : Interfaces.Unsigned_16
     with
       Import,
       Address => System'To_Address (16#6C00_0080#),
       Volatile;
begin
   TFT.Pixel_Format_Set (DBI => 16);
   TFT.Sleep_Out;
   delay 0.005;
   TFT.Display_On;
   TFT.Write_Memory;

   for J in 1 .. 240 * 320 loop
      VRAM := Interfaces.Unsigned_16'Mod (J);
   end loop;

Example use aa_stm32_drivers with STM32F4XX Pro. Run Alire to build:

alr -C examples/stm32_f4xx_pro build

Launch GNAT Studio with Alire:

alr -C examples/stm32_f4xx_pro exec gnatstudio

Make sure alr in the PATH. Open the examples/stm32_f4xx_pro folder in VS Code. Use pre-configured tasks to build projects and flash (openocd or st-util). Install Cortex Debug extension to launch pre-configured debugger targets.

• Simple example for STM32F4XX Pro board - complete example for the generic instantiation.