Trying to decipher USB heartbeat vs actual data

Discussion in 'The Projects Forum' started by Zotto, May 11, 2016.

  1. Zotto

    Thread Starter Member

    Mar 3, 2016
    Hey I am trying to figure out a way to be able to read a signal from a USB, and decipher whether or not that signal is actual data, or just the USB heartbeat signal, which simply means the USB is still on. I am thinking I would need to use a PLD, or FPGA. Any references to websites or personal knowledge would be greatly appreciated.
  2. Papabravo


    Feb 24, 2006
    Do you have a copy of the USB specification? If not, do you know where to get one?