Sensors, Electronics and Prototyping

Reply To: Time Scale

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I wouldn’t think that the BeagleBone would have a hard time synthesizing a good clock rate, nor has the UM7 had those kinds of issues before. If there is a lot of bad data coming in, here is where I would look (in order of likelihood):

1. Make sure that the BeagleBone and the UM7 share a common ground.
2. Make sure that the logic level for the BeagleBone is compatible with the 3.3V logic level of the UM7
3. Check for an intermittent/bad connection on the TX and RX lines of the UART. An oscope can help you determine whether the signals are clean.
4. Check your parsing software. If it fails to retrieve bytes from the receive buffer fast enough, bytes could be dropped.