Re: TI-H: Touch screens

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Touch screens
From: gussie@alaska.net (Grant Stockly)
Date: Sat, 9 May 1998 11:40:43 -0700
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


Actually you only need one ADC if you get the right one...

>What you need are two A/D Converters and a microcontroler. You just turn the x
>and y value from the touch screen into two digital values. If you were realy
>good ith the AVR or PIC or whatever, you might add a switch to select calc
>models, and then program it to create TI formated variables (x and y), so
>BASIC programs could use the GETCBL or GET or whatever it's called. Like I
>said, it's a lot of work, but I think it would be possible! You'd probably
>need a third variable if you program the driver chip to support tapping. (like
>clicking a mouse button)
>--
>
>
>Richard Piotter
>richfile@prairie.lakes.com
>
>The Richfiles TI Hardware and BASIC web page:
>http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html

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