Experimental Physics and
Industrial Control System

Kevin Peterson via Tech-talk <tech-talk at aps.anl.gov> · Tue, 20 Jul 2021 09:17:22 -0500

Keenan,

Are the lua scripts that have been written available on github? If not

I propose adding them to the Lua ScriptMotor repo:

  https://github.com/epics-motor/motorScriptMotor

Kevin

P.S. The link is for everyone else; I know you know where the script

motor support lives.

On 7/16/21 6:00 PM, Lang, Keenan C. via Tech-talk wrote:

Pete,

I did just a quick set up of a scientist's AMC100, which should use the

same json REST api.

However, it's using the scriptable motor driver

(https://github.com/epics-motor/motorScriptMotor

<https://github.com/epics-motor/motorScriptMotor>) due to me not wanting

to deal with parsing a bunch of JSON in c/c++. So you'll need the master

branch of that motor module and to build motor against the lua epics

module (https://github.com/epics-modules/lua

<https://github.com/epics-modules/lua>).

If you still would want to use it, I have the script here:

https://github.com/keenanlang/Lua-Scripts/blob/master/motors/AMC100.lua

<https://github.com/keenanlang/Lua-Scripts/blob/master/motors/AMC100.lua>

You'll also need to grab json.lua from here:

https://github.com/rxi/json.lua <https://github.com/rxi/json.lua> (put

it in your working directory or edit line 3 of AMC100.lua to add the

path to the package search path)

Then the startup command calls are:

      drvAsynIPPortConfigure("AMC100-1_IP", "<INSERT IP HERE>:9090", 0,0,0)

      ScriptControllerConfig("AMC100-1", 2, "scripts/AMC100.lua",

"PORT=AMC100-1_IP")

The support assumes a motor that has an encoder. If you're dealing with

open loop steppers, it should just be a matter of switching the api

method names in the move and poll functions (lines 46 and 79).

Or, at the very least, since the scriptable motor is pretty much 1-to-1

compared to a standard model 3 driver, it shouldn't be too bad to

convert the logic to a c++ driver using https://github.com/nlohmann/json

<https://github.com/nlohmann/json> .

Keenan Lang

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System