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ST7735 1.8″ TFT Dispay: SPI vs General connection

Intro

I got a ST7735 based lcd from ebay and decided to play with it a bit.

Setup

  • Arduino UNO
  • 1.8″ TFT LCD from ebay
  • Some jumper cables

Code

All the guidelines for connecting the LCD to the Arduino can be found here: http://www.ladyada.net/products/18tftbreakout/, but there is one thing to note. In the tutorial there is a pin called “dc” (Data/Command) (thanks to sza2) (I am not sure what that stands for) , but on my LCD it’s named  “RS” (register select). So, to make it work, just ignore the difference in naming.

Display driver library: https://github.com/adafruit/Adafruit-ST7735-Library

And the required graphics library: https://github.com/adafruit/Adafruit-GFX-Library

I am using the demo-sketches from the AdafruitST7735\examples\:

  • graphicstest
  • graphicstest_highspeed

Comparison itself

In the video you can see the communication protocol speed comparison.

Conclusion

SPI is the way to go 🙂

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