/***************************************************************************//**
* @brief Processes Standard Request (Chapter 9 Command)
* @return Status of request (type @ref USB_Status_TypeDef)
* @note This function takes no parameters, but it uses the setup command
* stored in @ref myUsbDevice.setup.
******************************************************************************/
USB_Status_TypeDef USBDCH9_SetupCmd(void)
{
USB_Status_TypeDef status = USB_STATUS_OK;
switch (myUsbDevice.setup.bRequest)
{
case GET_STATUS:
status = GetStatus();
break;
case CLEAR_FEATURE:
status = ClearFeature();
break;
case SET_FEATURE:
status = SetFeature();
break;
case SET_ADDRESS:
status = SetAddress();
break;
case GET_DESCRIPTOR:
status = GetDescriptor();
break;
case GET_CONFIGURATION:
status = GetConfiguration();
break;
case SET_CONFIGURATION:
status = SetConfiguration();
break;
case GET_INTERFACE:
status = GetInterface();
break;
case SET_INTERFACE:
status = SetInterface();
break;
// case GET_MS_DESCRIPTOR:
// status = HandleMsRequest();
// break;
default:
status = USB_STATUS_REQ_ERR;
break;
}
// Reset index to 0 in case one of the above commands modified it
USB_SetIndex(0);
// If the command resulted in an error, send a procedural stall
if (status == USB_STATUS_REQ_ERR)
{
SendEp0Stall();
}
return status;
}
/***************************************************************************//**
* @brief Handles Endpoint 0 transfer interrupt
******************************************************************************/
static void handleUsbEp0Int(void)
{
USB_SetIndex(0);
if (USB_Ep0SentStall() || USB_GetSetupEnd())
{
USB_Ep0ClearSentStall();
USB_ServicedSetupEnd();
myUsbDevice.ep0.state = D_EP_IDLE;
myUsbDevice.ep0.misc.c = 0;
}
if (USB_Ep0OutPacketReady())
{
if (myUsbDevice.ep0.misc.bits.waitForRead == true)
{
myUsbDevice.ep0.misc.bits.outPacketPending = true;
}
else if (myUsbDevice.ep0.state == D_EP_IDLE)
{
myUsbDevice.ep0String.c = USB_STRING_DESCRIPTOR_UTF16LE;
USB_ReadFIFOSetup();
// Vendor unique, Class or Standard setup commands override?
#if SLAB_USB_SETUP_CMD_CB
if (USBD_SetupCmdCb(&myUsbDevice.setup) == USB_STATUS_REQ_UNHANDLED)
{
#endif
if (myUsbDevice.setup.bmRequestType.Type == USB_SETUP_TYPE_STANDARD)
{
USBDCH9_SetupCmd();
}
else
{
SendEp0Stall();
}
#if SLAB_USB_SETUP_CMD_CB
}
else
{
// If in-packet but callback didn't setup a USBD_Read and we are expecting a data byte then
// we need to wait for the read to be setup and nack packets till USBD_Read is called.
if ((myUsbDevice.setup.bmRequestType.Direction == USB_SETUP_DIR_OUT)
&& (myUsbDevice.ep0.state != D_EP_RECEIVING)
&& (myUsbDevice.setup.wLength)
)
{
myUsbDevice.ep0.misc.bits.waitForRead = true;
}
}
#endif
}
else if (myUsbDevice.ep0.state == D_EP_RECEIVING)
{
handleUsbEp0Rx();
}
else
{
myUsbDevice.ep0.misc.bits.outPacketPending = true;
}
}
if ((myUsbDevice.ep0.state == D_EP_TRANSMITTING) && (USB_Ep0InPacketReady() == 0))
{
handleUsbEp0Tx();
}
}
