[REBOL] using wait on a serial device
From: dlhawley:home at: 2-Nov-2000 14:50
I am building at least a prototype of an instrument which reports
it's data collection via e-mail using REBOL. Currently it runs on
QNX4, but probably will run on QNX RTP/Nto.
I have several instruments which are connecteded via serial ports
as well as a LCD/keypad display. I have writing to the display working
and can read characters from the keypad, but am having trouble building
a loop around a wait statement.
I open the lcd with the following:
lcd-fp: open/mode %/dev/ser1 [ direct write read binary ]
writing works as expected using insert. To read chars I use:
char: first lcd-fp
but doing a: wait [lcd-fp]
>> wait [lcd-fp]
** Script Error: Invalid argument: ?port?.
** Where: wait [lcd-fp]
>> type? lcd-fp
I was hoping that this would work the same as a tcp/ip port since I'm
going to need to do the same kind of thing to read the instruments.
It looks like REBOL is thinking that something opend using file (%)
semantics is not fit for an fd in a C: select() call.
Do I have any choice here besides writing C RS-232 <-> tcp/ip
interfaces to the divices and REBOL?
Also is there any facility to shell off external scripts from REBOL/CORE?
David L. Hawley D.L. Hawley and Associates 1.503.274.2242
Software Engineer [David--L--Hawley--computer--org]