73 lines
1.5 KiB
Rust
73 lines
1.5 KiB
Rust
#![macro_use]
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#[cfg_attr(i2c_v1, path = "v1.rs")]
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#[cfg_attr(i2c_v2, path = "v2.rs")]
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mod _version;
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use crate::peripherals;
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pub use _version::*;
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pub enum Error {
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Bus,
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Arbitration,
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Nack,
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Timeout,
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Crc,
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Overrun,
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}
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pub(crate) mod sealed {
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use crate::gpio::Pin;
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pub trait Instance {
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fn regs() -> &'static crate::pac::i2c::I2c;
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}
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pub trait SclPin<T: Instance>: Pin {
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fn af_num(&self) -> u8;
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}
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pub trait SdaPin<T: Instance>: Pin {
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fn af_num(&self) -> u8;
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}
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}
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pub trait Instance: sealed::Instance + 'static {}
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pub trait SclPin<T: Instance>: sealed::SclPin<T> + 'static {}
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pub trait SdaPin<T: Instance>: sealed::SdaPin<T> + 'static {}
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crate::pac::peripherals!(
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(i2c, $inst:ident) => {
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impl sealed::Instance for peripherals::$inst {
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fn regs() -> &'static crate::pac::i2c::I2c {
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&crate::pac::$inst
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}
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}
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impl Instance for peripherals::$inst {}
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};
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);
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macro_rules! impl_pin {
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($inst:ident, $pin:ident, $signal:ident, $af:expr) => {
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impl $signal<peripherals::$inst> for peripherals::$pin {}
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impl sealed::$signal<peripherals::$inst> for peripherals::$pin {
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fn af_num(&self) -> u8 {
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$af
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}
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}
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};
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}
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crate::pac::peripheral_pins!(
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($inst:ident, i2c, I2C, $pin:ident, SDA, $af:expr) => {
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impl_pin!($inst, $pin, SdaPin, $af);
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};
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($inst:ident, i2c, I2C, $pin:ident, SCL, $af:expr) => {
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impl_pin!($inst, $pin, SclPin, $af);
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};
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);
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