Re: [Gumstix-users] Help with Overo ADC

[amenon <ame...@gm...>]

Hi Hugo,

Thank you for your code sample. I built the kernel from a recent git pull
and this seems to include your patches for the tw4030-madc driver.

I tried your test program and see voltages at ADC2 and ADC7; 1.6V at ADC2
and 1.4V at ADC7. All the other ADC float close to zero. I measured the
voltage at ADC2 and ADC7 with a voltmeter; ADC7 read 1.4V and ADC2 drops to
nearly zero (both on the voltmeter and the mad-test program). However, when
I provide a voltage (1.5V) at any ADC pin (2-7) with the ground of the
source connected to AGND, the test program reading still floats near zero.
Is there something you think I could be doing wrong?

Btw, I am using an Overo Earth with the Tobi board. The Tobi has the same
40pin header as the Summit.

Thanks.

-Arvind

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