RxUsbCtrlTransfer

Executes synchronous Control Transfer with a specific endpoint.

Syntax
rc = RxUsbCtrlTransfer(Handle,Endpoint,AltSetting,RequestType,                       Request,Value,Index,NumBytes,Data,Timeout)

Parameters

 * Handle : the Device Handle received from the previous RxUsbOpen.
 * Endpoint : the Endpoint Number appropriate for the control transfer.
 * AltSetting : the Alternate Setting of the interface having this endpoint.
 * RequestType : the characteristics of the Standard Device Request.
 * Request : the specific request code of the Standard Device Request.
 * Value : the request dependent value of the Standard Device Request.
 * Index : the request dependent index of the Standard Device Request.
 * Timeout : the timeout to wait for completion in milliseconds.

For device-to-host data transfer:


 * NumBytes : the number of bytes to be transferred or 0 for no data transfer.
 * Data : the name of the variable to receive the data bytes transferred.

For host-to-device data transfer:


 * NumBytes : the name of the variable to receive the number of bytes transferred.
 * Data : the character string if any with the data bytes to be transferred.

Return Code
0x0000 - NO_ERROR

Errors
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 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

Example Code
/* add RxUsbCtrlTransfer */ rc = RxFuncAdd('RxUsbCtrlTransfer','usbcalls','RxUsbCtrlTransfer') say '+RxUsbCtrlTransfer,RC=0x'd2x(rc)

/* invoke RxUsbCtrlTransfer device-to-host */ drop Data /* receives string of data bytes read */ RequestType=x2d(81); Request=x2d(06) /* get interface descriptor */ Value=x2d(2200); Index=x2d(0000); NumBytes=4096; Timeout=8000; /* hid report */ rc = RxUsbCtrlTransfer(Handle,0,0,RequestType,Request,Value,Index,NumBytes,Data,Timeout) say '*RxUsbCtrlTransfer,RC=0x'd2x(rc)

/* invoke RxUsbCtrlTransfer device-to-host */ drop Data /* receives string of data bytes read */ RequestType=x2d(A1); Request=x2d(01) /* get interface class report */ Value=x2d(0300); Index=x2d(0000); NumBytes=8; Timeout=8000; /* hid feature report */ rc = RxUsbCtrlTransfer(Handle,0,0,RequestType,Request,Value,Index,NumBytes,Data,Timeout) say '*RxUsbCtrlTransfer,RC=0x'd2x(rc)

/* invoke RxUsbCtrlTransfer host-to-device */ Data=x2c(00 00 00 00 00 00 00 00) /* clear data */ RequestType=x2d(21); Request=x2d(09) /* set interface class report */ Value=x2d(0300); Index=x2d(0000); drop NumBytes; Timeout=8000; /* hid feature report */ rc = RxUsbCtrlTransfer(Handle,0,0,RequestType,Request,Value,Index,NumBytes,Data,Timeout) say '*RxUsbCtrlTransfer,RC=0x'd2x(rc)

/* drop RxUsbCtrlTransfer */ rc = RxFuncDrop('RxUsbCtrlTransfer') say '-RxUsbCtrlTransfer,RC=0x'd2x(rc)

Related Functions

 * RxUsbCtrlMessage
 * RxUsbOpen