[Hackrf-dev] HackRF USB

[chillmf at nctv.com]

Dominic,

Thanks, you have given me quite a bit to chew on.

Regards,

Charley

On 2016-04-22 18:08, Dominic Spill wrote:

> On 22 April 2016 at 09:18,  <chillmf at nctv.com> wrote: 
> 
>> After reading the documentation that I can find I do not see a clear
>> declaration of the device profile which the HackRF supports such as HID,
>> MCS, CDC, or etc.
> 
> None of the above.  HackRF uses a custom USB profile (sometimes called
> vendor specific), which in this case involved two bulk endpoints for
> sending IQ data to and receiving it from the HackRF.  Everything else
> is handled over the control endpoint, EP0.
> 
>> I am using a STM32F469 Disco development board and I would like to access
>> the HackRF sample data for DSP processing.
> 
> You'll need to port or reimplement much of libhackrf for this.  The
> bulk of the code is in this file:
> https://github.com/mossmann/hackrf/blob/master/host/libhackrf/src/hackrf.c
> 
> Anywhere you see libusb_control_transfer() being called, it's using EP0.
> 
> If you want to move IQ data around, you'll need the bulk endpoints,
> which tend to be used with buffers and a callback that's called when
> the transfer completes.
> 
> I'm happy to give any more detail that I can if you have specific questions.
> 
> Dominic
 
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