static void usb_endpoint_set_type(
const usb_endpoint_t* const endpoint,
const usb_transfer_type_t transfer_type
) {
// NOTE: UM10503 section 23.6.24 "Endpoint 1 to 5 control registers" says
// that the disabled side of an endpoint must be set to a non-control type
// (e.g. bulk, interrupt, or iso).
const uint_fast8_t endpoint_number = usb_endpoint_number(endpoint->address);
if(endpoint->device->controller == 0) {
USB0_ENDPTCTRL(endpoint_number)
= ( USB0_ENDPTCTRL(endpoint_number)
& ~(USB0_ENDPTCTRL_TXT1_0_MASK | USB0_ENDPTCTRL_RXT_MASK)
)
| ( USB0_ENDPTCTRL_TXT1_0(transfer_type)
| USB0_ENDPTCTRL_RXT(transfer_type)
);
}
if(endpoint->device->controller == 1) {
USB0_ENDPTCTRL(endpoint_number)
= ( USB1_ENDPTCTRL(endpoint_number)
& ~(USB1_ENDPTCTRL_TXT1_0_MASK | USB1_ENDPTCTRL_RXT_MASK)
)
| ( USB1_ENDPTCTRL_TXT1_0(transfer_type)
| USB1_ENDPTCTRL_RXT(transfer_type)
);
}
}
static void usb_endpoint_enable(
const usb_endpoint_t* const endpoint
) {
const uint_fast8_t endpoint_number = usb_endpoint_number(endpoint->address);
if( usb_endpoint_is_in(endpoint->address) ) {
USB0_ENDPTCTRL(endpoint_number) |= (USB0_ENDPTCTRL_TXE | USB0_ENDPTCTRL_TXR);
} else {
USB0_ENDPTCTRL(endpoint_number) |= (USB0_ENDPTCTRL_RXE | USB0_ENDPTCTRL_RXR);
}
}
void usb_endpoint_disable(
const usb_endpoint_t* const endpoint
) {
const uint_fast8_t endpoint_number = usb_endpoint_number(endpoint->address);
if( usb_endpoint_is_in(endpoint->address) ) {
USB0_ENDPTCTRL(endpoint_number) &= ~(USB0_ENDPTCTRL_TXE);
} else {
USB0_ENDPTCTRL(endpoint_number) &= ~(USB0_ENDPTCTRL_RXE);
}
usb_queue_flush_endpoint(endpoint);
usb_endpoint_clear_pending_interrupts(endpoint);
usb_endpoint_flush(endpoint);
}
void usb_endpoint_stall(
const usb_endpoint_t* const endpoint
) {
// Endpoint is to be stalled as a pair -- both OUT and IN.
// See UM10503 section 23.10.5.2 "Stalling"
const uint_fast8_t endpoint_number = usb_endpoint_number(endpoint->address);
USB0_ENDPTCTRL(endpoint_number) |= (USB0_ENDPTCTRL_RXS | USB0_ENDPTCTRL_TXS);
// TODO: Also need to reset data toggle in both directions?
}
