RxUsbDeviceGetDescriptor: Difference between revisions
Created page with "==Description== Executes the Standard Device Request that obtains the Device Descriptor. ==Syntax== <pre> rc = RxUsbDeviceGetDescriptor(Handle,Length,Descriptor) </pre> ==P..." |
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==Return Code== | ==Return Code== | ||
<pre> | |||
0x0000 - NO_ERROR | |||
</pre> | |||
===Errors=== | ===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 | |||
0x4000 - USB_IORB_REQUEST | |||
0x80XX - USB_IORB_FAILED | |||
</pre> | |||
==Remarks== | ==Remarks== | ||
Revision as of 18:44, 22 January 2017
Description
Executes the Standard Device Request that obtains the Device Descriptor.
Syntax
rc = RxUsbDeviceGetDescriptor(Handle,Length,Descriptor)
Parameters
- Handle
- the Device Handle received from the previous RxUsbOpen.
- Length
- the desired number of bytes or 0 for the whole Device Descriptor.
- Descriptor
- the name of the variable to receive the Device Descriptor.
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
Remarks
Example Code
/* add RxUsbDeviceGetDescriptor */
rc = RxFuncAdd('RxUsbDeviceGetDescriptor','usbcalls','RxUsbDeviceGetDescriptor')
say '+RxUsbDeviceGetDescriptor(),RC=0x'd2x(rc)
/* invoke RxUsbDeviceGetDescriptor */
Length=18 /* to receive whole descriptor */
drop Descriptor /* receives device descriptor */
rc = RxUsbDeviceGetDescriptor(Handle,Length,Descriptor)
say '*RxUsbDeviceGetDescriptor(),RC=0x'd2x(rc)
/* drop RxUsbDeviceGetDescriptor */
rc = RxFuncDrop('RxUsbDeviceGetDescriptor')
say '-RxUsbDeviceGetDescriptor(),RC=0x'd2x(rc)