Скачать или смотреть 32x32 LED Dot Matrix Demo (MAX7219)

Short demo I made for a recent party. The display is 32x32 Leds (16 8x8 displays) using the MAX7219 display driver and controlled with an Arduino Uno. The Arduino shiftOut () function was not fast enough, so I ended up writing a library that uses a custom software SPI implementation I wrote. I'm not sure what the exact refresh rate is, but with 16 displays I think it's around 40-50 Hz. The more displays, the lower the refresh rate.

I'm currently working on a hardware SPI implementation of the library which should drastically increase this. The MAX7219 is capable of 10MHz serial interface, so with 16 displays I think I could theoretically reach a refresh rates of ~3-4 Khz (if my calculations are correct).

Update:
Both Hardware and software versions of the library are complete with a few examples for each.
https://github.com/agr00m