Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Thu, 24 Jul 2014 11:27:43 +0200

On 22.07.2014 21:17, Bryan J. Boardman / Aware Electronics Corp. wrote:

StreamDevice might be overkill so my question is, if the customer wants
to periodically poll the monitor for current reading and do something
with it, for example plot, sound an alarm, etc. which would be the best
solution StreamDevice, asynDriver or some other solution?

StreamDevice OR asynDriver is not the choice. StreamDevice uses

asynDriver for the communication with the hardware. It just does the

parsing and formatting for you. And no, it is no overkill.

I gleaned the above from an example but am not sure what much of it means, for example dbLoadRecords "aware.db","P=DZ,BUS=L0 28"

This passes two macros to the template, where they are used as $(P) and

$(BUS). P is in this particular case the record prefix, BUS is the

asynDriver port and address as configured in the startup script:

vxi11Configure "L0","gpib-dz-1",0,0.0,"gpib0",0,0

That is a VXI11 (aka "GPIB over Ethernet") device with hostname (of the

LAN-GPIB gateway for example) "gpib-dz-1" and GPIB address 28.

For serial communication, the setup will be different, the rest

(template, protocol) stays the same.

Terminator = CR LF;
get_aware_reading {
    out "\aP"; in "%f";
}

This is exactly what StreamDevice was made for.

RS-232 serial port and a built-in USB port using FTDI chip(FTDI devices now supported in Ubuntu 11.10, kernel 3.0.0-19)

If Linux shows it as a /dev/tty* character device,

asynDriver/StreamDevice can use it.

Dirk

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System