Re: [Libusb-devel] how to use function libusb_fill_interrupt_transfer(...)

[Segher B. <se...@ke...>]

>> static void LIBUSB_CALL transfer_cb_fn (struct libusb_transfer*
>> transfer){
>>   cout<<"call back function called"<<endl;
>> }
>>
>> Void main(...){
>>
>> ...
>> 	 libusb_fill_interrupt_transfer (transfer, dev_handle, 0x81,
>> 		 data, sizeof(data), transfer_cb_fn, NULL, 0);
>>
>> 	 libusb_submit_transfer(transfer);
>> ...
>>
>> }
>
> Maybe your callback function never gets called because the transfer
> never completes.  In other words, maybe the device never sends any
> interrupt packets.

It sounds more like he never calls libusb_handle_events() or similar.


Segher