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Topic: Due I2C Randomly Locks Up (Read 479 times) previous topic - next topic


Mar 20, 2017, 11:53 am Last Edit: Mar 20, 2017, 12:14 pm by mushman
I am using a arduino due to communicate with a MAX7310 and LTC2657.  The purpose is to allow multiple boards selected by the expander; the board currently connected then has 32 analog outputs providing a 0 to 10v signal, it can also read 32 analog inputsl but I have chopped this out of the code attached to keep it simple!

It is connected on SDA and SCL ...

The code attached randomly locks; it can lock up immedately or run for many hours before locking up.

I have purchased a scope to monitor the signals; but I am now way out of my depth ..

Any help would be appreciated; I have now struggled to understand this for several weeks myself!

When it locks up I can see that the SCL lines are 3V3 on both the arduino and analog PCB; the analog has 3v3 on the sda line.. but the arduino sda is 0v0.

I have tested this on a mega; with the same problems ...

If I run on the SDA1 and SCL1 I get the same problems?

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