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Display Class for ILITEK ILI9341 TFT LCD Driver

1 Scope

This document defines the ECMAScript class supporting the ILI9341 single-chip SOC driver for TFT LCDs from ILI Technology Corp.

2 Conformance

This class specification conforms to the Display Class Pattern of ECMA-419, ECMAScript® Embedded Systems API Specification.

3 Normative References

4 Notational Conventions

5 ILI9341 Display Class

Module Specifier: embedded:display/LCD/ILI9341

The ILI9341 Display Class implements the Display Class Pattern. It extends the pattern with additional properties on the option objects passed to the constructor and configure method.

Properties of constructor Options Object

Property Description
spi A SPI class constructor options object with the configuration of the SPI controller connected to the ILI9341. This property is required.
dc A Digital class constructor options object with the configuration of the ILI9341 "data or command" pin. This property is required.
reset A Digital class constructor options object with the configuration of the ILI9341 reset pin. This property is optional. If present, a hardware reset is performed when the class is instantiated.

Properties of configure Options Object

The following properties are optional.

Where possible, property names reflect the configuration commands described in section 8.2 of the data sheet.

The brightness property of the Display Class Pattern is not implemented by this display.

Property Description
format As per Display Class Pattern. Only option 8 (16-bit RGB 5:6:5 big-endian) is supported.
rotation As per Display Class Pattern. Initial value is 0.
sleep Boolean specifying if the LCD module is in minimum power consumption mode (true) or not (false). Initial value is false.
invert Boolean specifying if the display colors are inverted. Initial value is false.
display Boolean specifying if the display renders a blank image (false) or the contents of the frame memory (true). Initial value is true.
idle Boolean specifying if the ILI9341 idle mode is enabled (true) or disabled (false). Initial value is false.
adaptiveBrightness String specifying the Content Adaptive Brightness Control mode. Options are "off", "ui", "still", and "moving". Initial value is "off".
adaptiveBrightnessMinimum Number specifying the minimum brightness level to be used by the Content Adaptive Brightness Control mode. Range is 0x00 to 0xFF. Initial value is 0x00.

adaptInvalid Implementation Note

The ILI9341 Display Class implements the adaptInvalid method as specified by the Display Class Pattern. It applies these rules to adapt the provided rectangle:

  • rectangle.x starts on an even-numbered pixel
  • rectangle.width is a multiple of 2