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qmk-fw/LUFA/Drivers/USB/LowLevel/Template/Template_Endpoint_Control_W.c

53 lines
1.4 KiB
C

uint8_t TEMPLATE_FUNC_NAME (const void* Buffer, uint16_t Length)
{
uint8_t* DataStream = ((uint8_t*)Buffer + TEMPLATE_BUFFER_OFFSET(Length));
bool LastPacketFull = false;
if (Length > USB_ControlRequest.wLength)
Length = USB_ControlRequest.wLength;
else if (!(Length))
Endpoint_ClearIN();
while (Length || LastPacketFull)
{
if (Endpoint_IsSETUPReceived())
return ENDPOINT_RWCSTREAM_HostAborted;
if (Endpoint_IsOUTReceived())
break;
if (USB_DeviceState == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
if (Endpoint_IsINReady())
{
uint8_t BytesInEndpoint = Endpoint_BytesInEndpoint();
while (Length && (BytesInEndpoint < USB_ControlEndpointSize))
{
TEMPLATE_TRANSFER_BYTE(DataStream);
Length--;
BytesInEndpoint++;
}
LastPacketFull = (BytesInEndpoint == USB_ControlEndpointSize);
Endpoint_ClearIN();
}
}
while (!(Endpoint_IsOUTReceived()))
{
if (USB_DeviceState == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
}
return ENDPOINT_RWCSTREAM_NoError;
}
#undef TEMPLATE_BUFFER_OFFSET
#undef TEMPLATE_FUNC_NAME
#undef TEMPLATE_TRANSFER_BYTE