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CC3200 + analogRead. Only reads half of the range

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I'm pretty new to CC3200 (and TI platform overall), but I can't get my head around a analogRead problem I'm having.


The analogRead works for voltages between 0 and +-1.6V (0 equals 0 on read, and 1.6 equals 4095)

I was expecting this to be 0=0 and 3.3=4095.


I've tested the same slider potentiometer on a TM4C129, and it works as expected.


Do I have to set some reference value to get the ADC working correctly on the CC3200?



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