View source for UsbIrqWrite

==Description==
Executes synchronous host-to-device Interrupt Transfer with a specific endpoint.

==Syntax==
<pre>
ulrc = UsbIrqWrite(Handle,ucEndpoint,ucAltSetting,ulNumBytes,pucData,ulTimeout)
</pre>

==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==
<pre>
0x0000 - NO_ERROR
</pre>
===Errors===
<pre>
0x0006 - ERROR_INVALID_HANDLE
0x0008 - ERROR_NOT_ENOUGH_MEMORY
0x0057 - ERROR_INVALID_PARAMETER
0x005F - ERROR_INTERRUPT
0x0122 - ERROR_TOO_MANY_HANDLES
0x0280 - ERROR_TIMEOUT
0x1B58 - USB_NOT_INIT
0x1B5B - USB_ERROR_INVALID_ENDPOINT
0x1B5C - USB_ERROR_LESSTRANSFERED
0x4000 - USB_IORB_REQUEST
0x80XX - USB_IORB_FAILED
0xFF0D - ERROR_INVALID_DATA
0xFF13 - ERROR_I24_INVALID_PARAMETER
0xFF13 - USB_IDC_PARMERR
0xFF18 - USB_IDC_ADDRINV
0xFF37 - ERROR_DEV_NOT_EXIST
0xFF5D - EROR_NO_ITEMS
0xFFA7 - ERROR_LOCK_FAILED
</pre>

==Remarks==

==Example Code==
<pre>
//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]);
  }
}
</pre>

==Related Functions==
* [[UsbIrqRead]]
* [[UsbDataTransfer]]
* [[UsbOpen]]

[[Category:USBCalls]]