warwolt / rkseq Goto Github PK

Implement software driver for shift-register based button input and LED output. Input should use the 74HC165, and output should use the 74HC595.

Some initial debug infrastructure should be adding logging support.
Reference: https://efundies.com/avr-and-printf/

MIDI has support for a feature called "Active Sense" which is a form of pinging which helps indicate that another device is still connected. The rk-seq should support both receiving and transmitting active sense messages.

http://midi.teragonaudio.com/tech/midispec/sense.htm

On first receiving active sense, the controller could log Midi input connected.
On active sense timeout, the controller could log Midi input disconnected

Implement tempo selection using a rotary encoder and 74HC595 7-seg display.

Since the serial USB communication uses the only hardware UART of the atmega328p, the MIDI communication will need to be done using software UART.

To try out a software uart driver, the existing logging communication should be implemented using software uart instead of hw uart temporarily.

Add basic support to receive MIDI messages and print them over the logging infrastructure in #1.

Some references:

• https://os.mbed.com/components/5-Pin-DIN-MIDI-Connector/
• https://learn.adafruit.com/midi-for-makers/receive-midi-over-uart-and-send-over-usb

Add a circuit diagram for the atmega + all peripheral ICs to keep track of what the software runs on and interacts with