TI-H: Re: Newbie Q - The imfamous 'not working' message
[Prev][Next][Index][Thread]
TI-H: Re: Newbie Q - The imfamous 'not working' message
From: "William Cox" <william@characterlink.net>
> I'm using the $4 dollar
> schemo. I've been over the circuit a number of time, and I'm fairly
certian
> that all is well. But, it doesn't work. Whenever I plug in the cable into
> the COM1 port and into my calc. The screen (on the calc) freezes.
Generally it will freeze if the link program has not initialized the serial
port correctly. When idle the voltages on both link port connectors (calc
and link cable) should be about 5v. If you check you will almost certainly
find that one or both of your link cable lines are at 0 volts. For some
reason the calc runs slow under this condition, I don't know why, perhaps
the processor enters a tight wait loop to monitor that line for the
communication protocol.
> None of the programs I've DLd have gotten there.
One of them, Cal I think, used to have the com1 and com2 backwards, which
caused no end of problems for people.
DK
Follow-Ups:
References: