I wrote some software some time ago to test reDOT. First I used Atmel's AVR for testing, but newer and showable Version of this test software are written for ST's STM8 (these 0.7 cents cheap Chinese boards). If you are interested: https://github.com/al-1/STM8_TIL305/

It is not doing much. Just count up though all ASCII chars. (and it is with 1095B already over 1kB). More features like brightness control or serial interface will be added.