Experimental Physics and
Industrial Control System

Phillip Sorensen <[email protected]> · Fri, 19 Jan 2007 15:51:52 -0500

Emmanuel Mayssat wrote:

Before you send a command to your serial device, you should clear the
serial buffers.
So a read operation becomes:
1/ Read ( you will read nothing most of the time), this operation
clears /flushs the serial buffers.
2/ send your serial commnad/inquiry
3/ read the serial port a second time to get your PV value
Note that this is also assuming that you are using serial port locking,
and that this feature is working correctly (i.e. only 1 write-read
request at a time )

That sounds like it would work, but I am currently using the asyn
devGpib device support module framework with GPIBREAD commands. The
framework handles the actual communications.
I can rewrite the device support to use GPIBCVTIO commands and write the
communication code myself, but I would prefer to use the devGpib code
for as much as possible.
Phil Sorensen
CHESS

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System