/*----------------------------------------------------------------------------+
| Interrupt Sub-routines |
+----------------------------------------------------------------------------*/
BYTE SetupPacketInterruptHandler(VOID)
{
BYTE bTemp;
BYTE bWakeUp = FALSE;
USBCTL |= FRSTE; // Function Reset Connection Enable - set enable after first setup packet was received
usbProcessNewSetupPacket:
// copy the MSB of bmRequestType to DIR bit of USBCTL
if((tSetupPacket.bmRequestType & USB_REQ_TYPE_INPUT) == USB_REQ_TYPE_INPUT)
{
USBCTL |= DIR;
}
else
{
USBCTL &= ~DIR;
}
bStatusAction = STATUS_ACTION_NOTHING;
// clear out return data buffer
for(bTemp=0; bTemp<USB_RETURN_DATA_LENGTH; bTemp++)
{
abUsbRequestReturnData[bTemp] = 0x00;
}
// decode and process the request
bWakeUp = usbDecodeAndProcessUsbRequest();
// check if there is another setup packet pending
// if it is, abandon current one by NAKing both data endpoint 0
if((USBIFG & STPOWIFG) != 0x00)
{
USBIFG &= ~(STPOWIFG | SETUPIFG);
goto usbProcessNewSetupPacket;
}
return bWakeUp;
}
VOID SetupPacketInterruptHandler(VOID)
{
USBCTL |= FRSTE; // Function Reset Connection Enable
// NAK both input and output endpoints
tEndPoint0DescriptorBlock.bOEPBCNT = EPBCNT_NAK;
usbProcessNewSetupPacket:
bStatusAction = STATUS_ACTION_NOTHING;
// clear out return data buffer
abUsbRequestReturnData[0] = 0x00;
abUsbRequestReturnData[1] = 0x00;
// decode and process the request
usbDecodeAndProcessUsbRequest();
USBIFG &= ~SETUPIFG; // clear the interrupt bit
// check if there is another setup packet pending
// if it is, abandon current one by NAKing both data endpoint 0
if((USBIFG & STPOWIFG) != 0x00)
{
USBIFG &= ~(STPOWIFG | SETUPIFG);
goto usbProcessNewSetupPacket;
}
}
