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stm32/otg: fix CONTROL OUT transfers on F4.

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This commit is contained in:
Dario Nieuwenhuis 2023-11-06 03:38:42 +01:00
parent 70a700e430
commit b4eef6b1ee
1 changed files with 15 additions and 5 deletions
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20
embassy-stm32/src/usb_otg/usb.rs
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@ -40,6 +40,7 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
// Handle RX
while r.gintsts().read().rxflvl() {
let status = r.grxstsp().read();
trace!("=== status {:08x}", status.0);
let ep_num = status.epnum() as usize;
let len = status.bcnt() as usize;
@ -51,6 +52,15 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
assert!(len == 8, "invalid SETUP packet length={}", len);
assert!(ep_num == 0, "invalid SETUP packet endpoint={}", ep_num);
// flushing TX if something stuck in control endpoint
if r.dieptsiz(ep_num).read().pktcnt() != 0 {
r.grstctl().modify(|w| {
w.set_txfnum(ep_num as _);
w.set_txfflsh(true);
});
while r.grstctl().read().txfflsh() {}
}
if state.ep0_setup_ready.load(Ordering::Relaxed) == false {
// SAFETY: exclusive access ensured by atomic bool
let data = unsafe { &mut *state.ep0_setup_data.get() };
@ -96,6 +106,11 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
}
vals::Pktstsd::SETUP_DATA_DONE => {
trace!("SETUP_DATA_DONE ep={}", ep_num);
// Clear NAK to indicate we are ready to receive more data
T::regs().doepctl(ep_num).modify(|w| {
w.set_cnak(true);
});
}
x => trace!("unknown PKTSTS: {}", x.to_bits()),
}
@ -1312,11 +1327,6 @@ impl<'d, T: Instance> embassy_usb_driver::ControlPipe for ControlPipe<'d, T> {
w.set_rxdpid_stupcnt(1);
});
// Clear NAK to indicate we are ready to receive more data
T::regs().doepctl(self.ep_out.info.addr.index()).modify(|w| {
w.set_cnak(true);
});
trace!("SETUP received: {:?}", data);
Poll::Ready(data)
} else {