#kgtech

One my project requires mono audio and graphics LCD over WiFi. HLK-RM04 is very cheap board and can do just what i need, with some hacks :)

In this example i use simple app to stream audio over WiFi to this boad. I2S is using DMA and double buffering. Audio is generated using 8bit mono DAC, MCP4801.

SPI is semi-hardware; clock and data lines are hardware SPI, but chip select is hacked GPIO inide SPI driver. This is way faster than bitbanging. I have also included simple graphics library.

This is my old project. Reposting so it is available here.

It's an old, not so effective way to play games from SD or MMC card. It has many limitations so it is more like proof of concept. I actually have next version WIP, but nowhere from finishing right now.

Important files here.