Experimental Physics and
Industrial Control System

Christian Pauly <[email protected]> · Thu, 05 Feb 2015 17:58:14 +0100

Hi

I want to read out a little pressure sensor, for which i have already a

small python script which reads the sensor (via i2c bus) and prints the

sensor value to the terminal. Alternatively, i could also give the

sensor value as return value upon program exit.

Now i want to read this sensor inside an EPICS IOC.

Is it possible, to use StreamDevice for this, by calling the external

script / program and evaluating the return value ?

Maybe using the "exec" statement in the protocol file ?

Reading the sensor takes some time (500ms), so it would be good to do it

asynchronously, without blocking the IOC.

Or is there any other easy way, without reimplementing all the i2c

sensor readout eg inside an ASYN driver in C++ code ?

Thanks for any hints or help

Best regards,
Christian

--
Dr. Christian Pauly
Bergische Universität Wuppertal
Fachbereich C - Physik
Gaußstraße 20, D-42119 Wuppertal
Tel: +49 (0)202 439-2632,
Fax: +49 (0)202 439-2662

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System