Lone in the night

Introduction The context For a personal project, I want to program an Atmel ATtiny4313 microcontroller. I use microcontrollers for several years, but not on a regular basis (maybe 3-4 times a year), mostly for testing and generally with a deceptive result. But failure isn't the best training? This article aims to share my errors and success, as well as being a personal log. The project The project is to replace the main board of a Soundpool MO4, a MIDI OUT extension for the Atari ST; details here . Overall, the project is pretty simple: reading the parallel port and copy verbatim the data to MIDI out. This is the reason behind my choice of this particular microcontroller, since it embeds an USART and has an 8 bits parallel port (20 pins DIP package). The MO4 having 4 MIDI Outs, I will use 4 ATTiny4313, one for each out; this is actually cheaper than finding a 4-channel USART. Each microcontroller must determine if the data present on the parallel port shoul...