acq400_hapi: acq400 Host API

python module to connect to remote hosts

• acq400_hapi: source code for the connectivity package
• user_apps : example user client applications
• test_apps : more detailed validations

Installation

V2.0.0 : works with Python 2.7 and 3.x

Now needs the "future" feature: on linux: sudo pip install future on Windows: py -version -m pip install future

RECOMMENDATION: install with PIP: pip install acq400_hapi

That way, "import acq400_hapi" is available from wherever the program is run.

To run the apps, user_apps or test_apps, clone this repo. The connectivity package is available globally as a library from pip, or you can run the code in acq400_hapi directly, by using PYTHONPATH

API Documentation

Library

http://www.d-tacq.com/resources/HAPI/acq400_hapi/index.html

Example Applications

http://www.d-tacq.com/resources/HAPI/user_apps/index.html

How it works

class Acq400 nails up a socket connection to all the site servers at 4220+s, as well as running a status monitor thread on 2235 and allowing access to post-shot data on 53000+ch

each knob on the site is presented as a property of the connection, so that simple bash-script-like syntax can be used

uut.s0.set_arm=1

Example: running a session interactively while a test loop is running:
>>> import acq400_hapi
>>> uut = acq400_hapi.Acq400("10.12.132.22", monitor=False)
>>> uut.s1.shot
'348'
>>> uut.s1.shot
'348'
>>> uut.s1.shot
'349'

The goal is to make it easy to remote-script multiple uut's.

Example:

from acq400_hapi import *
uut1=acq400.Acq400("acq1001_144")
uut2=acq400.Acq400("acq1001_145")

for ii in range(0,10):
	c1 = uut1.s1.SIG_SAMPLE_COUNT_COUNT.split(" ")[1]
	c2 = uut2.s1.SIG_SAMPLE_COUNT_COUNT.split(" ")[1]
	print("%s %s" % (c1, c2))
11078689363247 11078689363247
11078689363247 11078689363247
11078739404360 11078739404360
11078739404360 11078739404360
11078739404360 11078789398809
11078789398809 11078789398809
11078789398809 11078789398809
11078839399330 11078839399330
11078839399330 11078839399330

... and yes, these are EPICS PV's, so we could use capy. But, this way, it's all vanilla python, no other installs required.

Note also, knob names eg

SIG:SAMPLE_COUNT:COUNT are auto converted to valid python identifiers:
SIG_SAMPLE_COUNT_COUNT

You can enumerate all the knobs with

uut.s0.help()
..
uut.s6.help()

Help also takes a regex.
uut.s0.help(*COUNT)

Example:
>>> import acq400_hapi
>>> uut = acq400_hapi.Acq400("10.12.132.22", monitor=False)
>>> for f in uut.s0.help('.*FREQ'):
...     uut.s0.get_knob(f)
... 
'SIG:CLK_EXT:FREQ 25007219'
'SIG:CLK_MB:FREQ 50012464'
'SIG:CLK_S1:FREQ 50010624'
'SIG:CLK_S2:FREQ 0'
'SIG:EVT_EXT:FREQ 0'
'SIG:EVT_MB:FREQ 0'
'SIG:EVT_S1:FREQ 0'

The Acq400 class can be fairly slow to instantiate (imagine an ACQ2106 with 6 sites populated), but once the connections are nailed up, then control links are fast. => The use case is: make the connection at the beginning, then operate over long periods.

TODO:

• add a 4210 socket for live stream?.
• instantiate the uut, site clients in parallel