RxUsbStringSetDescriptor
Description
Warning: Do NOT use this function unless you know your USB device supports it.
Executes the Standard Device Request that adds or updates the String Descriptor.
Syntax
rc = RxUsbStringSetDescriptor(Handle,Index,Language,Length,Descriptor)
Parameters
- Handle
- the Device Handle received from the previous RxUsbOpen.
- Index
- the Descriptor Index or 0 to supply the array of Language Codes.
- Language
- the Language Code. The Language Code for English is 1033.
- Length
- the desired number of bytes or 0 for the whole String Descriptor.
- Descriptor
- the String Descriptor appropriate for the device.
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
Remarks
Warning: Do NOT use this function unless you know your USB device supports it.
Example Code
/* add RxUsbStringSetDescriptor */
rc = RxFuncAdd('RxUsbStringSetDescriptor','usbcalls','RxUsbStringSetDescriptor')
say '+RxUsbStringSetDescriptor(),RC=0x'd2x(rc)
/* invoke RxUsbStringSetDescriptor */
Index=2 /* second string descriptor index */
Language=x2d(0409) /* the english language */
Descriptor=x2c(1203430061006E006F005300630061006E00)
Length=length(Descriptor) /* to replace whole descriptor */
rc = RxUsbStringSetDescriptor(Handle,Index,Language,Length,Descriptor)
say '*RxUsbStringSetDescriptor(),RC=0x'd2x(rc)
/* drop RxUsbStringSetDescriptor */
rc = RxFuncDrop('RxUsbStringSetDescriptor')
say '-RxUsbStringSetDescriptor(),RC=0x'd2x(rc)