While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.

Hi, According to your imgur vs GitHub link, something is funky. The GitHub ST7789 is about SPI. Your image has the SPI on the Pi in use. However, Imgur pic – the display’s labelling (along ...

Communication between the Raspberry Pi and the 4DPi-24-HAT is providing by a 48MHz SPI connection thanks to the on-board processor for direct command interpretation and SPI the same as the ...