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Arduino_ST7789_Fast

Fast SPI library for the ST7789 240x240 IPS display

YouTube video: https://youtu.be/GciLKcWQZK4

Significantly optimized for 16MHz AVR Arduino boards (2.5-5x faster than other libraries)

Achieved 6.9Mbps SPI transfer rate (at DIV2/16MHz clock)

Configuration

Use "define COMPATIBILITY_MODE" - then the library should work on all Arduino compatible boards Remove above for the best performance on 16MHz AVR

Use "#define CS_ALWAYS_LOW" for LCD boards where CS pin is internally connected to the ground, it gives better performance

Extra Features

  • invertDisplay()
  • sleepDisplay()
  • enableDisplay()
  • idleDisplay() - saves power by limiting colors to 3 bit mode (8 colors)
  • resetDisplay() - software reset
  • partialDisplay() and setPartArea() - limiting display area for power saving
  • setScrollArea() and setScroll() - smooth vertical scrolling
  • fast drawImage() from RAM
  • fast drawImage() from flash (PROGMEM)

Connections:

LCD pin LCD pin name Arduino
#01 GND GND
#02 VCC VCC (3.3V only!)
#03 SCL D13/SCK
#04 SDA D11/MOSI
#05 RES D8 or any digital
#06 DC D7 or any digital
#07 BLK NC

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