> > Anybody have any idea how to manually control the DTR line on the Palm
> > serial port?
>
> There aren't that many options for the DTR line because on the Palm it is
> hardwired to the power of the 232 tranceiver. By opening and closing the
> serial port you can control the voltage of DTR to be +3 or +6V however.
>
> Maybe if you say what you need we can suggest how to work around some
> limitations like this. With some help from others on this list I have
been
> able to control the RTS and TXD lines via Dragonball (EZ) register
> manipulation. Certainly not the preferred method but just about the only
> way to do it.
>
> Help yourself to the code but be sure to fix any bugs :)
Wow...that's great! Thanks!
The device I need to talk to requires me to make DTR high for 25ms, then
low, then RTS high for a specified amount of time, etc. I read that opening
and closing the port can flip DTS between +3V and +6V, but I need to control
RTS independently of DTR...if it means I have to do a little register
manipulation, so be it. :)
Thanks again,
Craig
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