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luagpib
Overview
A library for the lua programming language to access measurement instruments via the GPIB bus.The package contains a compiled lua interpreter. It does not require any other software besides an installed GPIB card supporting the NI488 standard.
Example
-- ***************************************************************
-- * Load GPIB dll interface
-- ***************************************************************
require('gpib_libloader')
-- ***************************************************************
-- * Query *IDN? response
-- ***************************************************************
local h=ibdev(0, 19) -- board 0 addr 19
ibwrt(h, "*IDN?")
print(gpib.ibrd(h))
-- ***************************************************************
-- * Clean up
-- ***************************************************************
ibloc(h) -- return local control
ibonl(h, 0) -- close instrument connection
gpib.shutdown() -- unload DLL
Download the example here
Download
Download the whole package here (contains executable and source)Using luagpib
A lua interpreter is included in the bin directory.Run it from the command line, and give for example the test.lua program as a 2nd argument:
When no GPIB card is found, an error message as shown results.
If the necessary drivers are not found, there will be a different error about a missing DLL.
Reference
A good description of the gpib functions can be found from the linux-GPIB documentation.At least Agilent and National Instruments cards are shipped with a command reference in the software package.
- ibdev(pad, sad)
- ibwrt(ud, str)
- ibrd(ud)
- ibrdn(ud, len) Reads exactly n bytes
- iberr() Returns content of iberr
- ibsta() Returns table with contents of ibsta register
- ibonl(ud, a)
- ibloc(ud, a)
- shutdown() Releases the dll
- sleep(x) Delays execution for x ms
compiling luagpib
Luagpib is compiled using Mingw on Windows.From the command line, type
| make clean make |
By default it compiles against the included lua 5.1 interpreter.
It also works with wxlua, if the lua dll and the headers are replaced with their wxLua counterparts.
© Markus Nentwig 2007-2008
The content of this page is provided without any warranty and may not be reproduced without permission.