Potentiometer problem of TWR-K53N512: wrong reading

[jerrylian]

I just bought the kit TWR-K53N512 a few days ago:

* I just run the demo code from accompanying DVD

* On the first day or two, potentiometer reading can range from 0-100% when I rotate it

* Later on, the reading can only range from 0-2%

Could be a defect of the board? Anyone has similar problems?

[miduo]

Hi,

Please make sure that the Jumper JP1 is ON if would like to read the ADC1_DM1 pin of the Potentiometer.

[jerrylian]

Yes, JP1 is already ON, otherwise I couldn't read from potentiometer. The problems:

* At the beginning, the reading ranges from 0-100.

* Now, the reading ranges from 0-2 only.

* By the way, the reading of build-in temperature sensor is always zero now.

* (It seems to be correct at the beginning days!)