fix: remove hardcoded endpoint

fix: add DataPID toggle re-init in case of soft reset

Author: mikesmitty

src/machine/machine_nrf52840_usb.go

@@ -229,19 +229,23 @@ func initEndpoint(ep, config uint32) {
 	switch config {
 	case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointIn:
 		enableEPIn(ep)
+		setEPDataPID(ep|usb.EndpointIn, false)
 
 	case usb.ENDPOINT_TYPE_BULK | usb.EndpointOut:
 		nrf.USBD.INTENSET.Set(nrf.USBD_INTENSET_ENDEPOUT0 << ep)
 		nrf.USBD.SIZE.EPOUT[ep].Set(0)
 		enableEPOut(ep)
+		setEPDataPID(ep, false)
 
 	case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointOut:
 		nrf.USBD.INTENSET.Set(nrf.USBD_INTENSET_ENDEPOUT0 << ep)
 		nrf.USBD.SIZE.EPOUT[ep].Set(0)
 		enableEPOut(ep)
+		setEPDataPID(ep, false)
 
 	case usb.ENDPOINT_TYPE_BULK | usb.EndpointIn:
 		enableEPIn(ep)
+		setEPDataPID(ep|usb.EndpointIn, false)
 
 	case usb.ENDPOINT_TYPE_CONTROL:
 		enableEPIn(0)
@@ -259,7 +263,7 @@ func SendUSBInPacket(ep uint32, data []byte) bool {
 	sendUSBPacket(ep, data, 0)
 
 	// clear transfer complete flag
-	nrf.USBD.INTENCLR.Set(nrf.USBD_INTENCLR_ENDEPOUT0 << 4)
+	nrf.USBD.INTENCLR.Set(nrf.USBD_INTENCLR_ENDEPOUT0 << ep)
 
 	return true
 }