🚀 go-pugleaf

In article <83h1fBA1z5cxEwpu@pzoptic.demon.co.uk>, Tim Carter
<tim@pzoptic.demon.co.uk> writes

>Friends
>what I would like to do is address individual serial port pins to run an
>external device from a c or pascal program.
>eg on program command "X" pin 1 will go high (?+5V) and on command "Y"
>pin 1 will go to ground.

It would give a positive or negative voltage rather than 0 and 5.

If you want 0 and 5 you could use the parallel port.


>Is this possible and if so how? If not serial port pins then any other
>port?

It could be as simple as using open() to get at LPT1 as a file then
doing writes to the file. Reading from the parallel port is a tad more
tricky. You may have to latch the data as it comes out of the port.

What exactly are you trying to do ?  What are you aiming to control ?


>If this is the wrong news group I sincerely apologise - please tell me
>where to go (nicely!).

Sci.electronics is really the place I guess but by all means discuss it
here.


J/.
-- 
John Beardmore