//*****************************************************************************
//
//! This function is used to retrieve a report from a HID device.
//!
//! \param psHIDInstance is the value that was returned from the call to
//! USBHHIDOpen().
//! \param ui32Interface is the interface to retrieve the report from.
//! \param pui8Data is the memory buffer to use to store the report.
//! \param ui32Size is the size in bytes of the buffer pointed to by
//! \e pui8Buffer.
//!
//! This function is used to retrieve a report from a USB pipe. It is usually
//! called when the USB HID layer has detected a new data available in a USB
//! pipe. The USB HID host device code will receive a
//! \b USB_EVENT_RX_AVAILABLE event when data is available, allowing the
//! callback function to retrieve the data.
//!
//! \return Returns the number of bytes read from report.
//
//*****************************************************************************
uint32_t
USBHHIDGetReport(tHIDInstance *psHIDInstance, uint32_t ui32Interface,
uint8_t *pui8Data, uint32_t ui32Size)
{
//
// Read the Data out.
//
ui32Size = USBHCDPipeReadNonBlocking(psHIDInstance->ui32IntInPipe,
pui8Data, ui32Size);
//
// Return the number of bytes read from the interrupt in pipe.
//
return(ui32Size);
}
static void USBHCDCInterruptCallback(uint32_t ulPipe, uint32_t ulEvent)
{
uint32_t ulSize;
//
// Handles a request to schedule a new request on the interrupt IN
// pipe.
//
if(ulEvent == USB_EVENT_SCHEDULER)
{
USBHCDPipeSchedule(ulPipe, SchedulePipeInterruptBuffer, 100);
}
//
// Called when new data is available on the interrupt IN pipe.
//
if(ulEvent == USB_EVENT_RX_AVAILABLE)
{
//
// If the callback exists then call it.
//
if(g_USBHCDCDevice.pfnCallback != 0)
{
//
// Read the Data out.
//
ulSize = USBHCDPipeReadNonBlocking(ulPipe, SchedulePipeInterruptBuffer,
100);
//
// Call
//
g_USBHCDCDevice.pfnCallback(&g_USBHCDCDevice,
CDC_EVENT_INTERRUPT,
(void*)SchedulePipeInterruptBuffer,
ulSize);
//
// Schedule another read
//
USBHCDPipeSchedule(ulPipe, SchedulePipeInterruptBuffer, 100);
//UARTprintf("USBHCDCInterruptCallback\n\r");
}
}
}
//*****************************************************************************
//
//! This function is used to retrieve a report from a HID device.
//!
//! \param ulInstance is the value that was returned from the call to
//! USBHHIDOpen().
//! \param ulInterface is the interface to retrieve the report from.
//! \param pucData is the memory buffer to use to store the report.
//! \param ulSize is the size in bytes of the buffer pointed to by
//! \e pucBuffer.
//!
//! This function is used to retrieve a report from a USB pipe. It is usually
//! called when the USB HID layer has detected a new data available in a USB
//! pipe. The USB HID host device code will receive a
//! \b USB_EVENT_RX_AVAILABLE event when data is available, allowing the
//! callback function to retrieve the data.
//!
//! \return Returns the number of bytes read from report.
//
//*****************************************************************************
unsigned long
USBHHIDGetReport(unsigned long ulInstance,
unsigned long ulInterface,
unsigned char *pucData,
unsigned long ulSize)
{
tHIDInstance *pHIDInstance;
//
// Cast the instance pointer to the correct type for ease of use.
//
pHIDInstance = (tHIDInstance *)ulInstance;
//
// Read the Data out.
//
ulSize = USBHCDPipeReadNonBlocking(pHIDInstance->ulIntInPipe, pucData,
ulSize);
//
// Return the number of bytes read from the interrupt in pipe.
//
return(ulSize);
}