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Convert uart half_duplex to use open-drain pull-up

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This commit is contained in:
Karun 2024-08-05 15:37:03 -04:00
parent afc8e684dd
commit a725892720
1 changed files with 4 additions and 3 deletions
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7
embassy-stm32/src/usart/mod.rs
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@ -1029,8 +1029,9 @@ impl<'d> Uart<'d, Async> {
/// (when it is available for your chip). There is no functional difference between these methods, as both
/// allow bidirectional communication.
///
/// The pin is always released when no data is transmitted. Thus, it acts as a standard
/// I/O in idle or in reception.
/// The TX pin is always released when no data is transmitted. Thus, it acts as a standard
/// I/O in idle or in reception. It means that the I/O must be configured so that TX is
/// configured as alternate function open-drain with an external pull-up
/// Apart from this, the communication protocol is similar to normal USART mode. Any conflict
/// on the line must be managed by software (for instance by using a centralized arbiter).
#[doc(alias("HDSEL"))]
@ -1051,7 +1052,7 @@ impl<'d> Uart<'d, Async> {
Self::new_inner(
peri,
None,
new_pin!(tx, AfType::output(OutputType::PushPull, Speed::Medium)),
new_pin!(tx, AfType::output_pull(OutputType::OpenDrain, Speed::Medium, Pull::Up)),
None,
None,
None,