Building a complex sequencer with the Pi Pico
Dec 22, 2021 16:15:28 GMT
admin, MikMo, and 9 more like this
Post by keurslagerkurt on Dec 22, 2021 16:15:28 GMT
Hey all!
Been making a sequencer with the Pi Pico on my breadboard!
This week i've been learning a lot about the Pico, and I wanted to learn more about its 'PIO' functionality. Which basically are some small CPU cores running alongside the main cores that can set output pins. I thought this would be perfect for a sequencer.
This way, the clocking & triggering is done very precisely by a so-called 'state machine' in the PIO that runs completely independent from the main core. This makes it nice and stable, while our main core can handle inputs, the oled,..
A first, functional version is here on github: github.com/ZVanMoerkerke/PicoSequencer
First version has 6 trigger sequencers to the output pins. Sequences can be arbitrary lengths. You can add probability to any trigger as well.
I'm looking to also add:
- Conditional triggers
- Trigger repeats & microtiming
- CV out
- Interfacing with the OLED
- Mute buttons
..
In the future, I hope to make a PCB version of the Pico, but I still need to clear some things out. I also want to test it a bit more on the breadboard first, before I decide on the amount of inputs/outputs, pins,....
I also hope to make this code into a library in the future, to make it nice & easy to use!
You can find a video here:
www.reddit.com/r/EuroPi/comments/rm84y1/building_a_sequencer_with_the_pico/
Been making a sequencer with the Pi Pico on my breadboard!
This week i've been learning a lot about the Pico, and I wanted to learn more about its 'PIO' functionality. Which basically are some small CPU cores running alongside the main cores that can set output pins. I thought this would be perfect for a sequencer.
This way, the clocking & triggering is done very precisely by a so-called 'state machine' in the PIO that runs completely independent from the main core. This makes it nice and stable, while our main core can handle inputs, the oled,..
A first, functional version is here on github: github.com/ZVanMoerkerke/PicoSequencer
First version has 6 trigger sequencers to the output pins. Sequences can be arbitrary lengths. You can add probability to any trigger as well.
I'm looking to also add:
- Conditional triggers
- Trigger repeats & microtiming
- CV out
- Interfacing with the OLED
- Mute buttons
..
In the future, I hope to make a PCB version of the Pico, but I still need to clear some things out. I also want to test it a bit more on the breadboard first, before I decide on the amount of inputs/outputs, pins,....
I also hope to make this code into a library in the future, to make it nice & easy to use!
You can find a video here:
www.reddit.com/r/EuroPi/comments/rm84y1/building_a_sequencer_with_the_pico/
