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Unread 12-02-2016, 00:48
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RobotPy Guy
AKA: Dustin Spicuzza
FRC #1418 (), FRC #1973, FRC #4796, FRC #6367 ()
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Re: I2C Error on read() or write()

Quote:
Originally Posted by nickbrickmaster View Post
RobotPy is 2016.2.0 on robot and driver station.
Is this a bug in robotpy or am I messing up somewhere?

Thanks for the help.
It very well could be a bug in RobotPy, the i2c interface isn't particularly well tested -- though, I was able to talk to the NavX device via I2C without any issues.

What value are you passing in for 'port' to the I2C constructor? I ask because I see that in HAL it checks to see if port < 0, and returns -1 if so -- which wouldn't set errno (and perhaps why you're seeing the 'success' message). I'll add a check for that so it can't happen in the future...

This error also reminds me of this bug that someone reported for WPILib.
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Maintainer of RobotPy - Python for FRC
Creator of pyfrc (Robot Simulator + utilities for Python) and pynetworktables/pynetworktables2js (NetworkTables for Python & Javascript)

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