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Phil_D

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    Phil_D
    Phil_D reacted to scootergarrett in Analog Discovery 2 vs Raspberry Pi 3   
    The AD2 working with the pi4 is THE BEST.  Because I complained about it not working a long time ago I should praise it working now.
  2. Like
    Phil_D
    Phil_D reacted to attila in Analog Discovery 2 vs Raspberry Pi 3   
    Hi @Phil_D
    The received data set may contain inserted or altered by dummy zero bytes so the data can be shifted randomly...
    To detect such it would require adding a custom CRC wrapper above the communication, firmware and software architectural changes...
  3. Like
    Phil_D
    Phil_D reacted to rprr in Analog Discovery 2 vs Raspberry Pi 3   
    Just to add, that I've tried it with the recently released Raspberry Pi  3B+ but no luck. I have updated to the latest kernels. Very frustrating  
    I wonder if there is a problem with the Digilent Adept runtime drivers for linux.
  4. Like
    Phil_D
    Phil_D reacted to attila in Analog Discovery 2 vs Raspberry Pi 3   
    Hi @Phil_D @rprr
    The problem is that the USB IN packets/bytes are randomly lost/altered.
    I tried various kernel options, limiting the USB transfer rates but had no luck. The data corruption reduced from one in 1-60 seconds to one in 10-60 minutes, which it is still not good...
    It seems that the root of the problem is in the low level FTDI library, kernel or USB modules, or between them...
    The Analog Discovery is working fine with other SOCs but not with the RPi.
    I also notice issue with the USB keyboard I use with the RPi, time to time key presses are not received. 
    You can find many similar RPi issues on the net:
    https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=5249&sid=8839659cb92b7475fa196b2fad775d9f&start=250
    http://www.ftdicommunity.com/index.php?topic=40.0
  5. Like
    Phil_D
    Phil_D reacted to attila in Analog Discovery 2 vs Raspberry Pi 3   
    Hi @Wojtek
    I have updated the PRi B2 a few months ago and tried different boot/kernel options mentioned on other forums... but nothing helped.
  6. Like
    Phil_D
    Phil_D reacted to attila in Analog Discovery 2 vs Raspberry Pi 3   
    FTDI USBs like AD, AD2, DD are not working with RPI model B (1,2,3) data packets/bytes are randomly lost. 
    The EExplorer with different USB controller is working fine on these.
    All devices are working with other embeddeds: Zed, Zybo, BeagleBone…
    According reports AD is working with the original RPI model A and probably Zero because it has similar chipset/USB.
    The problem seems to be with FTDI or RPI B USB, library or hardware. You can find such comments regarding RPI problems with other devices too. Unfortunately we couldn't remediate this problem.
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