max/embassy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

partial alternate function configuration on STM32f1

Browse Source
This commit is contained in:
Tobias Pisani
2021-10-09 11:35:05 +02:00
parent f9a576d13d
commit 39880de958
9 changed files with 72 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
embassy-stm32/src/gpio.rs
View File

@ -350,12 +350,15 @@ impl<'d, T: Pin> InputPin for OutputOpenDrain<'d, T> {
pub(crate) mod sealed {
use super::*;
/// Output type settings
/// Alternate function type settings
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum OutputType {
PushPull,
OpenDrain,
pub enum AFType {
// InputFloating,
// InputPullUp,
// InputPullDown,
OutputPushPull,
OutputOpenDrain,
}
pub trait Pin {
@ -394,21 +397,35 @@ pub(crate) mod sealed {
}
#[cfg(gpio_v1)]
unsafe fn set_as_af(&self, _af_num: u8, _af_type: OutputType) {
panic!("F1 alternate GPIO functions not supported yet!");
unsafe fn set_as_af(&self, _af_num: u8, af_type: AFType) {
// F1 uses the AFIO register for remapping.
// For now, this is not implemented, so af_num is ignored
// _af_num should be zero here, since it is not set by stm32-data
let r = pin.block();
let n = pin.pin() as usize;
let crlh = if n < 8 { 0 } else { 1 };
match af_type {
// TODO: Do we need to configure input AF pins differently?
AfType::OutputPushPull => {
r.cr(crlh).modify(|w| w.set_cnf(n % 8, vals::Cnf::PUSHPULL));
}
AfType::OutputOpenDrain => r
.cr(crlh)
.modify(|w| w.set_cnf(n % 8, vals::Cnf::OPENDRAIN)),
}
}
#[cfg(gpio_v2)]
unsafe fn set_as_af(&self, af_num: u8, af_type: OutputType) {
unsafe fn set_as_af(&self, af_num: u8, af_type: AFType) {
let pin = self._pin() as usize;
let block = self.block();
block
.afr(pin / 8)
.modify(|w| w.set_afr(pin % 8, vals::Afr(af_num)));
match af_type {
OutputType::PushPull => {
AfType::OutputPushPull => {
block.otyper().modify(|w| w.set_ot(pin, vals::Ot::PUSHPULL))
}
OutputType::OpenDrain => block
AfType::OutputOpenDrain => block
.otyper()
.modify(|w| w.set_ot(pin, vals::Ot::OPENDRAIN)),
}