UsbIrqWrite
Description
Executes synchronous host-to-device Interrupt Transfer with a specific endpoint.
Syntax
ulrc = UsbIrqWrite(Handle,ucEndpoint,ucAltSetting,ulNumBytes,pucData,ulTimeout)
Parameters
- Handle
- the Device Handle received from the previous UsbOpen.
- ucEndpoint
- the Endpoint Number with the Direction Bit set to zero.
- ucAltSetting
- the Alternate Setting of the interface having this endpoint.
- ulNumBytes
- the number of bytes to be transferred or 0 for no data transfer.
- pucData
- the address of the buffer with the data bytes to be transferred.
- ulTimeout
- the timeout to wait for completion in milliseconds.
Return Code
0000 - NO_ERROR
Errors
0006 - ERROR_INVALID_HANDLE 0008 - ERROR_NOT_ENOUGH_MEMORY 0057 - ERROR_INVALID_PARAMETER 005F - ERROR_INTERRUPT 0122 - ERROR_TOO_MANY_HANDLES 0280 - ERROR_TIMEOUT 1B58 - USB_NOT_INIT 1B5B - USB_ERROR_INVALID_ENDPOINT 1B5C - USB_ERROR_LESSTRANSFERED 4000 - USB_IORB_REQUEST 80XX - USB_IORB_FAILED
Remarks
Example Code
//Code Snippet - UsbIrqWrite
{
APIRET ulrc;
PUCHAR pucData;
UCHAR ucAltSetting = 0;
UCHAR ucData[4096];
UCHAR ucEndpoint = 0x02;
ULONG ulNumBytes = sizeof(ucData);
ULONG ulTimeout = 8000;
pucData = &ucData[0];
ulrc = UsbIrqWrite(Handle,ucEndpoint,ucAltSetting,ulNumBytes,pucData,ulTimeout);
printf("\nUsbIrqWrite - ulrc: 0x%04X (%hu)",ulrc,ulrc);
if (!ulrc) //success
{
int i; printf(" - interrupt data:\n");
for (i=0;i<ulNumBytes;i++) printf("%02X",ucData[i]);
}
}