RxUsbInterfaceGetAltSetting
Description
Executes the Standard Device Request that obtains the Alternate Setting for an interface.
Syntax
rc = RxUsbInterfaceGetAltSetting(Handle,Interface,AltSetting)
Parameters
- Handle
- the Device Handle received from the previous RxUsbOpen.
- Interface
- the specific Interface Number appropriate for the USB device.
- AltSetting
- the name of the variable to receive the Alternate Setting.
Return Code
Errors
Remarks
Example Code
/* add RxUsbInterfaceGetAltSetting */
rc = RxFuncAdd('RxUsbInterfaceGetAltSetting','usbcalls','RxUsbInterfaceGetAltSetting')
say '+RxUsbInterfaceGetAltSetting(),RC=0x'd2x(rc)
/* invoke RxUsbInterfaceGetAltSetting */
Interface=1 /* second interface number */
drop AltSetting /* receives alternate setting */
rc = RxUsbInterfaceGetAltSetting(Handle,Interface,AltSetting)
say '*RxUsbInterfaceGetAltSetting(),RC=0x'd2x(rc)
/* drop RxUsbInterfaceGetAltSetting */
rc = RxFuncDrop('RxUsbInterfaceGetAltSetting')
say '-RxUsbInterfaceGetAltSetting(),RC=0x'd2x(rc)