RxUsbDataTransfer
Description
Executes synchronous Bulk or Interrupt Transfer with a specific endpoint.
Syntax
rc = RxUsbDataTransfer(Handle,Endpoint,AltSetting,NumBytes,Data,Timeout,Flags)
Parameters
- Handle
- the Device Handle received from the previous RxUsbOpen.
- Endpoint
- the Endpoint Number appropriate for the data transfer.
- AltSetting
- the Alternate Setting of the interface having this endpoint.
- Timeout
- the timeout to wait for completion in milliseconds.
- Flags
- use 1 to transfer all data or 0 to allow less transferred.
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
Errors
Remarks
Example Code
/* add RxUsbDataTransfer */
rc = RxFuncAdd('RxUsbDataTransfer','usbcalls','RxUsbDataTransfer')
say '+RxUsbDataTransfer(),RC=0x'd2x(rc)
/* invoke RxUsbDataTransfer device-to-host */
drop Data /* receives string of data bytes read */
Endpoint=128+1; AltSetting=0; NumBytes=4096; Timeout=8000; Flags=0
rc = RxUsbDataTransfer(Handle,Endpoint,AltSetting,NumBytes,Data,Timeout,Flags)
say '*RxUsbDataTransfer(),RC=0x'd2x(rc)
/* invoke RxUsbDataTransfer host-to-device */
drop NumBytes /* receives number of data bytes written */
Endpoint=2; AltSetting=0; Data=copies(x2c(BD),4096); Timeout=8000; Flags=1
rc = RxUsbDataTransfer(Handle,Endpoint,AltSetting,NumBytes,Data,Timeout,Flags)
say '*RxUsbDataTransfer(),RC=0x'd2x(rc)
/* drop RxUsbDataTransfer */
rc = RxFuncDrop('RxUsbDataTransfer')
say '-RxUsbDataTransfer(),RC=0x'd2x