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stm32/otg: flush fifos on reconfigure and on ep disable.

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This commit is contained in:
Dario Nieuwenhuis 2023-06-27 00:42:24 +02:00
parent 715bf20c41
commit 28fb492c40
1 changed files with 26 additions and 1 deletions
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27
embassy-stm32/src/usb_otg/usb.rs
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@ -540,6 +540,19 @@ impl<'d, T: Instance> Bus<'d, T> {
fifo_top <= T::FIFO_DEPTH_WORDS,
"FIFO allocations exceeded maximum capacity"
);
// Flush fifos
r.grstctl().write(|w| {
w.set_rxfflsh(true);
w.set_txfflsh(true);
w.set_txfnum(0x10);
});
loop {
let x = r.grstctl().read();
if !x.rxfflsh() && !x.txfflsh() {
break;
}
}
}
fn configure_endpoints(&mut self) {
@ -744,7 +757,19 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
r.doepctl(ep_addr.index()).modify(|w| {
w.set_usbaep(enabled);
})
});
// Flush tx fifo
r.grstctl().write(|w| {
w.set_txfflsh(true);
w.set_txfnum(ep_addr.index() as _);
});
loop {
let x = r.grstctl().read();
if !x.txfflsh() {
break;
}
}
});
// Wake `Endpoint::wait_enabled()`