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 > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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