Hi. I am investigating the cap touch for a while, and I am working directly with the capacitive driver from here.
As being said there and other places, the driver will NOT use the COMP, but the ADC to measure, and while I take measurments I have 2 problems :
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To measure, as described, there is a resistor(1M) going from digital out to analog in, and the pad sensor goes to analog in. They show in the example that you can connect multiple sensors using this 1 output, but how would you connect 1 digital out, to multiple analog ins? you are going to short all your pads in any configuration you choose ( because pads goes to AINs and the single out goes to ALL inputs after the resistor)
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when measuring, they say that when I touch i have to measure higher results , but look what happens when I touch :
:INFO:2 1372 //no touch :INFO:2 1631 :INFO:2 1386 :INFO:2 1798 :INFO:2 1102 :INFO:2 1798 :INFO:2 989 // *touched from here ! :INFO:2 1775 :INFO:2 669 :INFO:2 1689 :INFO:2 667 :INFO:2 1699 :INFO:2 759 :INFO:2 1666 :INFO:2 717 // still touching
you can see that when i touch there is some sort of square signal and it's not just goes down (or up as it supposed to do ) . I can get over this easily buy it seems wrong.
