Matt Spencer
496b6bdc71
Key components: - no_std core so it can be used bare metal on embedded systems - default implementation for RPi 2350, with midi input and I2s output using PIO - Visualiser for the web to play with on a dev system
41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
//! Signal routing — connects module outputs to inputs.
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//!
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//! A `Patch` is a fixed-size connection graph. Each cable routes
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//! the output buffer of one slot into the CV or audio input of another.
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//! Const generics keep everything on the stack.
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/// A single cable: from slot `src` output to slot `dst` input.
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub struct Cable {
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pub src: usize,
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pub dst: usize,
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}
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/// A fixed-capacity patch with up to `MAX_CABLES` connections.
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pub struct Patch<const MAX_CABLES: usize> {
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cables: heapless::Vec<Cable, MAX_CABLES>,
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}
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impl<const MAX_CABLES: usize> Patch<MAX_CABLES> {
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pub fn new() -> Self {
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Self { cables: heapless::Vec::new() }
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}
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/// Add a cable; returns `Err(cable)` if the patch is full.
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pub fn connect(&mut self, src: usize, dst: usize) -> Result<(), Cable> {
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self.cables.push(Cable { src, dst }).map_err(|_| Cable { src, dst })
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}
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pub fn disconnect(&mut self, src: usize, dst: usize) {
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self.cables.retain(|c| !(c.src == src && c.dst == dst));
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}
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pub fn cables(&self) -> &[Cable] {
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&self.cables
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}
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}
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impl<const MAX_CABLES: usize> Default for Patch<MAX_CABLES> {
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fn default() -> Self { Self::new() }
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}
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