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Block input reads on Unknown state

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This commit is contained in:
Jennifer Wilcox 2021-04-24 17:28:33 -05:00
parent 2e5c1fc0e3
commit 3536604b9e
1 changed files with 16 additions and 10 deletions
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26
rp2040-hal/src/gpio.rs
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@ -154,20 +154,26 @@ macro_rules! gpio {
}
}
// TODO: Don't allow Unknown since we need to fix up the pad at least
impl<MODE> InputPin for $PXi<MODE> {
type Error = Infallible;
macro_rules! impl_input_for {
($MODE:ident) => {
impl InputPin for $PXi<$MODE> {
type Error = Infallible;
fn is_low(&self) -> Result<bool, Self::Error> {
Ok(!self.is_high()?)
}
fn is_low(&self) -> Result<bool, Self::Error> {
Ok(!self.is_high()?)
}
fn is_high(&self) -> Result<bool, Self::Error> {
unsafe {
Ok((*pac::SIO::ptr()).gpio_in.read().bits() & (1 << $i) != 0)
fn is_high(&self) -> Result<bool, Self::Error> {
unsafe {
Ok((*pac::SIO::ptr()).gpio_in.read().bits() & (1 << $i) != 0)
}
}
}
}
};
}
// Not allowed for Unknown since we don't know what state the pad is in
impl_input_for!(Input);
impl_input_for!(Output);
impl $PXi<Input> {
pub fn pull_high(&mut self) {