I did it with a PIC16F648A and a Nintendo DS resistive touch-screen in C.
The source code is not at hand right now. Later I will post the code and
the schematic.


Best regards,

Isaac



Em 31/7/2013 07:13, alan.b.pearce@stfc.ac.uk escreveu:
> Has anyone used resistive touch screens with the ADC on a PIC, i.e. witho=
ut using external chips such as the AR1000 series devices?
>
> The theory looks simple enough, I have a couple of app notes from TI wher=
e they describe how some ADC chips they make for use with touch screens wor=
k, and it seems a simple enough process. In some ways it is a wonder that t=
he hardware required hasn't been built into a PIC already, seeing there are=
 so many ADC channels available.
>
> My application is using a dsPic33E series chip, if that makes a differenc=
e.
>
> If anyone knows of example code to do this without external chips, for an=
y micro for doing this it would be appreciated.

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