ST7789 LCD controller

This is a driver for ST7789 LCD controller for 135x240 LCDs. These are available on TTGO's T-Display boards. Note: Different resolution might need different memory offset to work properly.

Support is included in the ST7789 (About Modules) module, using the Graphics library.

It's already wired up on the T-Display board as follows:

Note: The display takes around 150ms to initialise after calling 'connect'. There's an optional callback that is called after this time (shown in the examples). Sending data to it before initialisation may cause it not to initialise correctly.

Normal mode

// ST7789 demo code on TTGO T-Display
D4.set(); // LCD backlight on

var spi = new SPI();
spi.setup({mosi:D19 /* sda */, sck:D18 /* scl */});
var g = require("ST7789").connect(spi, D16 /* DC */, D5 /* CE */, D23 /* RST */, function() {
  g.clear();
  g.setRotation(1);
  g.drawString("Hello",0,0);
  g.setFontVector(20);
  g.setColor(0,0.5,1);
  g.drawString("Espruino",0,10);
});

This module doesn't use a double-buffer as it would use up almost all the RAM - 135 * 240 * 16bpp = 64800 bytes. Pixels are written to the display as they are drawn, so you will get some flicker and relatively slow updates. See the next heading for another option

Paletted Mode

Paletted mode is not yet supported

Using

(No tutorials are available yet)

Buying

• eBay ST7789 135x240
• eBay TTGO T-Display