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Support enable/disable SOF interrupt in USB peripheral #398

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Support enable/disable SOF interrupt in USB peripheral #398

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22 changes: 22 additions & 0 deletions hal/src/samd21/usb/bus.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -716,6 +716,14 @@ impl Inner {
usb.ctrlb.modify(|_, w| w.detach().clear_bit());
}

fn sof_interrupt(&self, enable: bool) {
if enable {
self.usb().intenset.write(|w| w.sof().set_bit());
} else {
self.usb().intenset.write(|w| w.sof().clear_bit());
}
}

/// Configures all endpoints based on prior calls to alloc_ep().
fn flush_eps(&self, mode: FlushConfigMode) {
for idx in 0..8 {
Expand Down Expand Up @@ -860,6 +868,10 @@ impl Inner {

let intbits = self.usb().epintsmry.read().bits();
if intbits == 0 {
if intflags.sof().bit() {
// clear start of frame interrupt
self.usb().intflag.write(|w| w.sof().set_bit());
}
return PollResult::None;
}

Expand Down Expand Up @@ -1003,6 +1015,16 @@ impl Inner {
}
}

impl UsbBus {
fn enable_sof_interrupt(&self) {
disable_interrupts(|cs| self.inner.borrow(cs).borrow().sof_interrupt(true))
}

fn disable_sof_interrupt(&self) {
disable_interrupts(|cs| self.inner.borrow(cs).borrow().sof_interrupt(false))
}
}

impl usb_device::bus::UsbBus for UsbBus {
fn enable(&mut self) {
disable_interrupts(|cs| self.inner.borrow(cs).borrow_mut().enable())
Expand Down