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| 1 | +use super::*; |
| 2 | + |
| 3 | +/// Pin type with dynamic mode |
| 4 | +/// |
| 5 | +/// - `P` is port name: `A` for GPIOA, `B` for GPIOB, etc. |
| 6 | +/// - `N` is pin number: from `0` to `15`. |
| 7 | +pub struct DynamicPin<const P: char, const N: u8> { |
| 8 | + /// Current pin mode |
| 9 | + mode: Dynamic, |
| 10 | +} |
| 11 | + |
| 12 | +impl<const P: char, const N: u8> DynamicPin<P, N> { |
| 13 | + pub const fn new(mode: Dynamic) -> Self { |
| 14 | + Self { mode } |
| 15 | + } |
| 16 | +} |
| 17 | + |
| 18 | +/// Tracks the current pin state for dynamic pins |
| 19 | +pub enum Dynamic { |
| 20 | + InputFloating, |
| 21 | + InputPullUp, |
| 22 | + InputPullDown, |
| 23 | + OutputPushPull, |
| 24 | + OutputOpenDrain, |
| 25 | +} |
| 26 | + |
| 27 | +#[derive(Debug, PartialEq)] |
| 28 | +pub enum PinModeError { |
| 29 | + IncorrectMode, |
| 30 | +} |
| 31 | + |
| 32 | +impl Dynamic { |
| 33 | + fn is_input(&self) -> bool { |
| 34 | + use Dynamic::*; |
| 35 | + match self { |
| 36 | + InputFloating | InputPullUp | InputPullDown | OutputOpenDrain => true, |
| 37 | + OutputPushPull => false, |
| 38 | + } |
| 39 | + } |
| 40 | + fn is_output(&self) -> bool { |
| 41 | + use Dynamic::*; |
| 42 | + match self { |
| 43 | + InputFloating | InputPullUp | InputPullDown => false, |
| 44 | + OutputPushPull | OutputOpenDrain => true, |
| 45 | + } |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +impl<const P: char, const N: u8> OutputPin for DynamicPin<P, N> { |
| 50 | + type Error = PinModeError; |
| 51 | + fn set_high(&mut self) -> Result<(), Self::Error> { |
| 52 | + if self.mode.is_output() { |
| 53 | + Pin::<Output<PushPull>, P, N>::new()._set_state(PinState::High); |
| 54 | + Ok(()) |
| 55 | + } else { |
| 56 | + Err(PinModeError::IncorrectMode) |
| 57 | + } |
| 58 | + } |
| 59 | + fn set_low(&mut self) -> Result<(), Self::Error> { |
| 60 | + if self.mode.is_output() { |
| 61 | + Pin::<Output<PushPull>, P, N>::new()._set_state(PinState::Low); |
| 62 | + Ok(()) |
| 63 | + } else { |
| 64 | + Err(PinModeError::IncorrectMode) |
| 65 | + } |
| 66 | + } |
| 67 | +} |
| 68 | + |
| 69 | +impl<const P: char, const N: u8> InputPin for DynamicPin<P, N> { |
| 70 | + type Error = PinModeError; |
| 71 | + fn is_high(&self) -> Result<bool, Self::Error> { |
| 72 | + self.is_low().map(|b| !b) |
| 73 | + } |
| 74 | + fn is_low(&self) -> Result<bool, Self::Error> { |
| 75 | + if self.mode.is_input() { |
| 76 | + Ok(Pin::<Input<Floating>, P, N>::new()._is_low()) |
| 77 | + } else { |
| 78 | + Err(PinModeError::IncorrectMode) |
| 79 | + } |
| 80 | + } |
| 81 | +} |
| 82 | + |
| 83 | +impl<const P: char, const N: u8> DynamicPin<P, N> { |
| 84 | + #[inline] |
| 85 | + pub fn make_pull_up_input(&mut self) { |
| 86 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 87 | + Pin::<Input<Floating>, P, N>::new().into_pull_up_input(); |
| 88 | + self.mode = Dynamic::InputPullUp; |
| 89 | + } |
| 90 | + #[inline] |
| 91 | + pub fn make_pull_down_input(&mut self) { |
| 92 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 93 | + Pin::<Input<Floating>, P, N>::new().into_pull_down_input(); |
| 94 | + self.mode = Dynamic::InputPullDown; |
| 95 | + } |
| 96 | + #[inline] |
| 97 | + pub fn make_floating_input(&mut self) { |
| 98 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 99 | + Pin::<Output<PushPull>, P, N>::new().into_floating_input(); |
| 100 | + self.mode = Dynamic::InputFloating; |
| 101 | + } |
| 102 | + #[inline] |
| 103 | + pub fn make_push_pull_output(&mut self) { |
| 104 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 105 | + Pin::<Input<Floating>, P, N>::new().into_push_pull_output(); |
| 106 | + self.mode = Dynamic::OutputPushPull; |
| 107 | + } |
| 108 | + #[inline] |
| 109 | + pub fn make_push_pull_output_in_state(&mut self, state: PinState) { |
| 110 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 111 | + Pin::<Input<Floating>, P, N>::new().into_push_pull_output_in_state(state); |
| 112 | + self.mode = Dynamic::OutputPushPull; |
| 113 | + } |
| 114 | + #[inline] |
| 115 | + pub fn make_open_drain_output(&mut self) { |
| 116 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 117 | + Pin::<Input<Floating>, P, N>::new().into_open_drain_output(); |
| 118 | + self.mode = Dynamic::OutputOpenDrain; |
| 119 | + } |
| 120 | + #[inline] |
| 121 | + pub fn make_open_drain_output_in_state(&mut self, state: PinState) { |
| 122 | + // NOTE(unsafe), we have a mutable reference to the current pin |
| 123 | + Pin::<Input<Floating>, P, N>::new().into_open_drain_output_in_state(state); |
| 124 | + self.mode = Dynamic::OutputOpenDrain; |
| 125 | + } |
| 126 | +} |
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