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Darksider7 / terkos

Automatically exported from code.google.com/p/terkos
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I2C pins not initialized correctly #9

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Measure the voltage on SCL and SDA after VEXpro power-on.

What is the expected output? What do you see instead?
SCL is low. It should be high, and should have gone high along with VCC. This 
seems to be causing the HM6352 compass to malfunction a lot of the time.

What version of the product are you using? On what operating system?
4.0 Head

Please provide any additional information below.
Dean Reece reports power-cycling IO power doesn't fix the compass.

Original issue reported on code.google.com by paul.bou...@gmail.com on 4 Dec 2011 at 10:37

GoogleCodeExporter commented 9 years ago 
This appears to be a power issue.  
The I2C signals are controlled by the FPGA and can't be changed until after 
boot.

Original comment by rich.m.l...@gmail.com on 13 Dec 2011 at 10:08