[Hackrf-dev] HackRF USB

[chillmf at nctv.com]

Ross,

Thanks for taking the time to explain the need for the full High Speed
USB port.

At this time I am getting ready to transition my work to the
STM32F746G-DISCO board which does have a separate HS USB port with the a
PHY chip.

So I will wait until I have this board in hand to look at porting the
hackrf.c code.

There is so much to learn!

Regards,

Charley

On 2016-04-23 06:19, Ross Whenmouth wrote:

> Hi Charley,
> 
> The STM32F469 has an on-chip USB2.0  FS (Full Speed = 12 Mbps) "PHY", but to operate in USB2.0 HS (High Speed = 480 Mbps), it needs to be connected to a "ULPI" PHY chip.
> 
> Does the STM32F469 Discovery board include a ULPI PHY? if not, I think that you will be seriously disappointed with the minimal bandwidth that you will be able to sample with your HackRF, that is, if it even works at all.
> 
> The HackRF takes 8 bit samples of each of the inphase & quadrature baseband signals. So, for say a 20 MHz sample rate, this is 16 bits x 20 MHz = 320 Mbit/second + USB overheads...
> 
> Cheers
> Ross Whenmouth
> _______________________________________________
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> HackRF-dev at greatscottgadgets.com
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