HRESULT
CMyDevice::GetSevenSegmentDisplay(
__in PSEVEN_SEGMENT SevenSegment
)
/*++
Routine Description:
This method synchronously retrieves the bar graph display information
from the OSR USB-FX2 device. It uses the buffers in the FxRequest
to hold the data it retrieves.
Arguments:
FxRequest - the request for the bar-graph info.
Return Value:
Status
--*/
{
WINUSB_CONTROL_SETUP_PACKET setupPacket;
ULONG bytesReturned;
HRESULT hr = S_OK;
//
// Zero the output buffer - the device will or in the bits for
// the lights that are set.
//
SevenSegment->Segments = 0;
//
// Setup the control packet.
//
WINUSB_CONTROL_SETUP_PACKET_INIT( &setupPacket,
BmRequestDeviceToHost,
BmRequestToDevice,
USBFX2LK_READ_7SEGMENT_DISPLAY,
0,
0 );
//
// Issue the request to WinUsb.
//
hr = SendControlTransferSynchronously(
&(setupPacket.WinUsb),
(PUCHAR) SevenSegment,
sizeof(SEVEN_SEGMENT),
&bytesReturned
);
return hr;
}
HRESULT
CMyDevice::GetBarGraphDisplay(
__in PBAR_GRAPH_STATE BarGraphState
)
/*++
Routine Description:
This method synchronously retrieves the bar graph display information
from the OSR USB-FX2 device. It uses the buffers in the FxRequest
to hold the data it retrieves.
Arguments:
FxRequest - the request for the bar-graph info.
Return Value:
Status
--*/
{
WINUSB_CONTROL_SETUP_PACKET setupPacket;
ULONG bytesReturned;
HRESULT hr = S_OK;
//
// Zero the contents of the buffer - the controller OR's in every
// light that's set.
//
BarGraphState->BarsAsUChar = 0;
//
// Setup the control packet.
//
WINUSB_CONTROL_SETUP_PACKET_INIT( &setupPacket,
BmRequestDeviceToHost,
BmRequestToDevice,
USBFX2LK_READ_BARGRAPH_DISPLAY,
0,
0 );
//
// Issue the request to WinUsb.
//
hr = SendControlTransferSynchronously(
&(setupPacket.WinUsb),
(PUCHAR) BarGraphState,
sizeof(BAR_GRAPH_STATE),
&bytesReturned
);
return hr;
}
HRESULT
CMyDevice::SetBarGraphDisplay(
_In_ PBAR_GRAPH_STATE BarGraphState
)
/*++
Routine Description:
This method synchronously sets the bar graph display on the OSR USB-FX2
device using the buffers in the FxRequest as input.
Arguments:
FxRequest - the request to set the bar-graph info.
Return Value:
Status
--*/
{
WINUSB_CONTROL_SETUP_PACKET setupPacket;
ULONG bytesTransferred;
HRESULT hr = S_OK;
//
// Setup the control packet.
//
WINUSB_CONTROL_SETUP_PACKET_INIT( &setupPacket,
BmRequestHostToDevice,
BmRequestToDevice,
USBFX2LK_SET_BARGRAPH_DISPLAY,
0,
0 );
//
// Issue the request to WinUsb.
//
hr = SendControlTransferSynchronously(
&(setupPacket.WinUsb),
(PUCHAR) BarGraphState,
sizeof(BAR_GRAPH_STATE),
&bytesTransferred
);
return hr;
}
