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Move pin configuration to gpio mod

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This commit is contained in:
Dario Nieuwenhuis 2021-05-15 02:39:08 +02:00
parent ee869efcb5
commit 8bb1bc3507
2 changed files with 27 additions and 21 deletions
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19
embassy-stm32/src/gpio.rs
View File

@ -184,6 +184,25 @@ pub(crate) mod sealed {
self.block().bsrr().write(|w| w.set_br(n, true));
}
}
unsafe fn set_as_af(&self, af_num: u8) {
let pin = self._pin() as usize;
let block = self.block();
block
.moder()
.modify(|w| w.set_moder(pin, vals::Moder::ALTERNATE));
block
.afr(pin / 8)
.modify(|w| w.set_afr(pin % 8, vals::Afr(af_num)));
}
unsafe fn set_as_analog(&self) {
let pin = self._pin() as usize;
let block = self.block();
block
.moder()
.modify(|w| w.set_moder(pin, vals::Moder::ANALOG));
}
}
pub trait OptionalPin {}

29
embassy-stm32/src/spi/spi_v1.rs
View File

@ -1,8 +1,6 @@
#![macro_use]
use crate::gpio::{AnyPin, Pin};
use crate::pac::gpio::vals::{Afr, Moder};
use crate::pac::gpio::Gpio;
use crate::gpio::{sealed::Pin, AnyPin};
use crate::pac::spi;
use crate::spi::{ByteOrder, Config, Error, Instance, MisoPin, MosiPin, SckPin, WordSize};
use crate::time::Hertz;
@ -42,13 +40,12 @@ impl<'d, T: Instance> Spi<'d, T> {
where
F: Into<Hertz>,
{
unborrow!(peri);
unborrow!(sck, mosi, miso);
unborrow!(peri, sck, mosi, miso);
unsafe {
Self::configure_pin(sck.block(), sck.pin() as _, sck.af());
Self::configure_pin(mosi.block(), mosi.pin() as _, mosi.af());
Self::configure_pin(miso.block(), miso.pin() as _, miso.af());
sck.set_as_af(sck.af());
mosi.set_as_af(mosi.af());
miso.set_as_af(miso.af());
}
let sck = sck.degrade();
@ -101,16 +98,6 @@ impl<'d, T: Instance> Spi<'d, T> {
}
}
unsafe fn configure_pin(block: Gpio, pin: usize, af_num: u8) {
let (afr, n_af) = if pin < 8 { (0, pin) } else { (1, pin - 8) };
block.moder().modify(|w| w.set_moder(pin, Moder::ALTERNATE));
block.afr(afr).modify(|w| w.set_afr(n_af, Afr(af_num)));
}
unsafe fn unconfigure_pin(block: Gpio, pin: usize) {
block.moder().modify(|w| w.set_moder(pin, Moder::ANALOG));
}
fn compute_baud_rate(clocks: Hertz, freq: Hertz) -> u8 {
match clocks.0 / freq.0 {
0 => unreachable!(),
@ -145,9 +132,9 @@ impl<'d, T: Instance> Spi<'d, T> {
impl<'d, T: Instance> Drop for Spi<'d, T> {
fn drop(&mut self) {
unsafe {
Self::unconfigure_pin(self.sck.block(), self.sck.pin() as _);
Self::unconfigure_pin(self.mosi.block(), self.mosi.pin() as _);
Self::unconfigure_pin(self.miso.block(), self.miso.pin() as _);
self.sck.set_as_analog();
self.mosi.set_as_analog();
self.miso.set_as_analog();
}
}
}