Re: TI-H: Linking Problem

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Linking Problem
From: Grant Stockly <gussie@stockly.com>
Date: Wed, 15 Sep 1999 21:36:49 -0800
In-Reply-To: <37D57905.1632E16@yahoo.com>
References: <Pine.LNX.4.04.9909072037170.495-100000@gandalf.pojnet.commsoft.se>
Reply-To: ti-hardware@lists.ticalc.org


On PCs, it would be a good idea to clear the fifo buffer if it exists.
Macs running Linux/MacOS/unix do this automatically when you init the port.

it won't trigger an 00 unless a start (and stop if selected) were detected.
Timing for stop and start are very tight so its unlikely that your problem
is comming from off sync data.

If one of the things is off sync, its going to be the dongle.  UARTS are
too good for those types of errors.


>i was wondering were i could find Per Finander's file on linking protocol
>thx
>
>Per Jonsson wrote:
>
>> I'm writing a linking application for the TI82 with GraphLink Cable under
>> Linux (or any other PC UNIX) and i've also seen this phenomena.
>> I don't know for shure, but I believe the problem is that there is some
>> kind of timing problem, and that the computer thinks there is data before
>> there is any data. Absencse of data means that the data is ZERO (
>> electrical that the recieve wire (relative the computer) on the RS-232
>> interface is high ( I that is strange, but RS-232 is an old standard))
>>
>> If my program was finished I could have sent it to you, but when I cleaned
>> up my code in the beginning of the summer, I acidently removed all my .c
>> files. The new version (It's in the works) is modulary build, and my Idea
>> is that I
>> should eventually support any combination of calculator and link.
>>
>> /Per
>>
>>
>> On Mon, 6 Sep 1999, mike dombrowski wrote:
>>
>> >
>> > Sorry if this is the wrong list but it seemed the most appropriate. I'm
>> > writing a program to send/recieve files from the TI-85 using the
>> > graphlink cable. I have the file describing the link protocol by Per
>> > Finander but I'm running into problems. For example when I'm in recieve
>> > mode and I send a string from the TI here's what I get:
>> >
>> > 00 <-- Why is this here?
>> > 85
>> > 06
>> > 09
>> > 00
>> > 80
>> > 00
>> > 0C
>> > 05
>> >
>> > What gives? All my program does is wait for something to be put in the
>> > serial buffer then reads it.
>> >
>> > ICQ: 11874015
>> > Organized Religion: The only thing preventing people from being
>> > civilized.
>> >
>> >

References:

Re: TI-H: Linking Problem

From: Per Jonsson <poj@sundsvall.mail.telia.com>

Re: TI-H: Linking Problem

From: Dan <danbert_82@yahoo.com>