[DSP-10] Upddate on Mac/Virtual PC Serial Port problem

[Courtney Duncan]

Hey Mike,

Yes, I had done the Fast PTT mod back in September and it has been 
working fine.  (It also gets rid of a bug where if you are in CW mode 
and hit the mic. button, it would lock into transmit and have to be 
rebooted.)

So, first thing I thought when I saw this error was that the Fast PTT 
mod had broken, or my configuration file had gotten corrupted.  Then, 
when just changing to a shorter cable with fewer connectors in the path 
made it work just fine again, I started thinking timing problems.

If I was going to work on this anymore, one thing to try would be to 
take lines out of the cable, or short them up or down.  That's where a 
breakout box would be invaluable.  I haven't even seen one of those in 
ten years and don't think I ever owned one personally.  Now that we 
appear to be in the USB era, it hardly seems worth the trouble to tool 
up for RS-232 debugging anymore.

In theory, we have software access to both ends of this problem.  In the 
EZLITE kit, the UART is emulated.  That being the case, a developer 
could make this work, in principle, by adjusting timing parameters, 
advances and things in code.  In practice, there are several learning 
curves between here and there!

Thanks,

Courtney

kd7ts wrote:

> Hi Courtney,
>
> I saw the error message you mentioned when using a serial cable that 
> was missing ? a wire needed for Fast PTT.
>
> Do you have the Fast PTT implemented in hardware ?
>
> If not, then the cable makes no difference.
>
> Probably unrelated, but might be worth checking.
>
> Mike KD7TS
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