RE: Defining enums to express state?

[Mark Rivers <rivers@cars.uchicago.edu>]

Hi Ryan,

 

For your valves you would use mbbo and mbbi records.  The enums for these have 2 items for each choice: a string and an integer value.  If you use the asynInt32 interface then the integer value is what is sent to the driver by the mbbo records.  The integer values could just be the index (0, 1, 2, …) or they could be values that have a specific meaning to the driver if that corresponds to some specific value your valve controller wants for each state.

 

If you look at asyn/testAsynPortDriverApp/src and /Db you will see examples of using mbbo and mbbi records with asyn.

 

If you have an mbbo or mbbi record BOY will just automatically populate the menu for you if you use the proper widget type.  I am not a BOY expert so if you have specific questions about that you can ask again.

 

Mark

 

 

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Ryan Pierce
Sent: Thursday, November 20, 2014 1:59 PM
To: tech-talk@aps.anl.gov
Subject: Defining enums to express state?

 

This is probably a really basic question....

 

The computer controlled brewing project I mentioned on this list a few months back is coming along quite well. Much of the keg welding and plumbing is done, and I've made a lot of progress with the control box that holds the power supplies, relays, Raspberry Pi, Arduino Mega, status lights, etc. I'm still a long way from actually brewing with it, as I haven't welded the frame or built out the propane system, but I'd like to try some integration testing with what I have.

 

I've been experimenting with async, cmd_response on the Arduino / Raspberry Pi and have CSS BOY on my laptop. I think I understand how to use ao records to output temperature, flow rate, fluid levels, etc.

 

The next task is to model my solenoid valves and motor controlled ball valves. I'd like to express states, e.g. Open, Closed, Opening, Closing,  Partially Open, etc. and be able to send commands, e.g. Open, Close, Nudge Open, Nudge Closed. I also need to send commands with an argument, e.g. "Fill the mash tun with 4.8 gallons of water" and monitor the progress.

 

Right now I'd like to display and control this manually in BOY, and eventually I'd like to learn SNL to set up scripts to automate frequently used actions.

 

Does anyone have any suggestions on resources to learn about defining enums in the db, how they are represented over async, and how to define command buttons and state indicators in BOY?

 

Thanks,

Ryan