TI-H: Re: Using the parallel port for I2C communications?

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TI-H: Re: Using the parallel port for I2C communications?

To: "TI-Hardware" <ti-hardware@lists.ticalc.org>
Subject: TI-H: Re: Using the parallel port for I2C communications?
From: "David Knaack" <dknaack@geocities.com>
Date: Mon, 24 May 1999 16:33:44 -0500
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: ti-hardware@lists.ticalc.org
Reply-To: ti-hardware@lists.ticalc.org

In order to use the joystick port to read a temp sensor, it appears

that all I have to do is attach a thermistor to pins 1 and 3 (X pos of

joystick A), and write a value to port 201h, then wait for bit 0 of the

status byte to return to 0. The time interval determines the resistance

according to the formula:

R = (T - 24.2)/.001

Piece of cake, anybody done it before?

DK

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Re: TI-H: Re: Using the parallel port for I2C communications?

From: Grant Stockly <gussie@stockly.com>

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