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knehowig

Member Since 23 Mar 2012
Offline Last Active Jan 05 2013 06:25 PM
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Posts I've Made

In Topic: Adafruit LCD MCP23017 IC

03 January 2013 - 02:54 AM

Stefan:

 

I'm having a problem using this shield with your toolbox code.

 

Everything builds fine and starts up well.  I get an initial sign on message to display on the LCD and can read the buttons fine.  My app periodically writes new data to the LCD (about every 3 seconds or so).  At random, the LCD/buttons stop working.  My app continues to run fine, but when I attempt to write to the LCD or read the state of the buttons, nothing on the shield works.

 

I suspect a problem with the I2C interface (the only way to recover from this is to power down the board).

 

Any thoughts?

 

Kelly


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