what is your Lua script writing environment like?

mattkime

big improvement in my dev environment - making my card reader ignore the lock tab

https://chdk.setepontos.com/d/2983

waterwingz

reyalp
You might want to consider using hostlua: changelog of trunk including comments / devtalk

As I noted there, I'm working on a more sophisticated emulation environment based on this, which will eventually be added to svn. Attached is my very very preliminary "emulator".
...
As noted above, this is a very early work in progress, more of a sketch of what I plan to do than anything else.

Did this ever go anywhere? Currently the stuff in tools/hostlua will not make - I think its having trouble with the math functions that rudi added recently.

Also, the greatest boost to Lua (and uBASIC) script development has probably been the use of chdkptp to load scripts over a USB cable rather that swapping cards in & out. That makes a huge difference in development time - maybe that's why people seem to have lost interest in a PC emulation environment?

msl

rudi has provided a great Lua test environment in German CHDK forum: http://forum.chdk-treff.de/viewtopic.php?f=7&t=2973

You can test CHDK lua scripts on the PC or on the camera. The base is the great editor notepad++ (portable or installed) with the plugin NppExec.

You need a compiled hostlua package, a special batch file, emu.lua and chdkptp.exe. The attachment from the link above contains all the necessary things. A batch file create_config.cmd creates a config file for Notepad++. For more informations translate the text file liesmich.txt from zip file

You can create a CHDK Lua script in Notepad++ and
run this local in the console of Notepad++
run this on the camera
run this on the camera with output on the Notepad++ console

[li]You can copy files.
[/li][li]You can execute chdkptp scripts[/li]
[/list]

For me is this the best way to write and test Lua scripts.

msl

waterwingz

msl
You need a compiled hostlua package, a special batch file, emu.lua and chdkptp.exe.
...
For me is this the best way to write and test Lua scripts.

Thanks msl. Unfortunately its a Windows solution - although Notepad++ will run under Wine so I guess I could play with that. Also, the current hostlua make process will need to be fixed.

reyalp

waterwingz
Did this ever go anywhere? Currently the stuff in tools/hostlua will not make - I think its having trouble with the math functions that rudi added recently.

Well apparently the attachment went somewhere, but other than that, no 🙁

These days I tend to do interactive testing in chdkptp

I haven't looked at rudi's stuff, but it would be good to get hostlua working again in the default builds, and keep an up to date version of emu.lua in the source tree.

philmoz

waterwingz
Currently the stuff in tools/hostlua will not make

It's working in trunk, revision 2713 should fix the release-1.1 version.

Phil.

waterwingz

Just started playing with Geany under Linux a bit. Its got a Lua plugin and enough scripting capability that it should be possible to replicate what rudy did with Notepad++ under Windows. And Geany is cross platform so it should work on Windows too.

waterwingz

philmoz
It's working in trunk, revision 2713 should fix the release-1.1 version.

Hmmmm ... I get

liblua.a(limathlib.o): In function `imath_sqrt':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:181: undefined reference to `sqrt'
liblua.a(limathlib.o): In function `imath_pow':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:175: undefined reference to `pow'
liblua.a(limathlib.o): In function `imath_log10':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:170: undefined reference to `log10'
liblua.a(limathlib.o): In function `imath_log2':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:165: undefined reference to `log2'
liblua.a(limathlib.o): In function `imath_log':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:160: undefined reference to `log'
liblua.a(cordic_math.o): In function `cathetus':
/home/build/chdk/tools/hostlua/../../modules/cordic_math.c:126: undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
make: *** [lua] Error 1

when I type "make" in the tools/hostlua directory using svn rev 2713 of the trunk.

philmoz

waterwingz

philmoz
It's working in trunk, revision 2713 should fix the release-1.1 version.

Hmmmm ... I get
[code]liblua.a(limathlib.o): In function `imath_sqrt':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:181: undefined reference to `sqrt'
liblua.a(limathlib.o): In function `imath_pow':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:175: undefined reference to `pow'
liblua.a(limathlib.o): In function `imath_log10':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:170: undefined reference to `log10'
liblua.a(limathlib.o): In function `imath_log2':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:165: undefined reference to `log2'
liblua.a(limathlib.o): In function `imath_log':
/home/build/chdk/tools/hostlua/../../lib/lua/limathlib.c:160: undefined reference to `log'
liblua.a(cordic_math.o): In function `cathetus':
/home/build/chdk/tools/hostlua/../../modules/cordic_math.c:126: undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
make: *** [lua] Error 1
[/code]
when I type "make" in the tools/hostlua directory using svn rev 2713 of the trunk.

It works on Windows and OSX.

I'm getting the same error on Linux using Hacki's toolchain so perhaps there's a problem with that.

Phil.

waterwingz

philmoz
I'm getting the same error on Linux using Hacki's toolchain so perhaps there's a problem with that.

All the missing function are in lib/math/wrapper.c

philmoz

waterwingz

philmoz
I'm getting the same error on Linux using Hacki's toolchain so perhaps there's a problem with that.

All the missing function are in lib/math/wrapper.c

No, hostlua is compiled for the host system, not CHDK.
It should be picking up the functions from libm; but even forcing it to load this library (-lm) doesn't work with Hacki's toolchain.

Phil.

srsa_4c

It builds on my OpenSuse (x86) machine. The ARM toolchain is not even on my PATH, so it's an issue with the host environment.

nafraf

Yes, it seems to be an issue with the host environment. This patch seems to solve problem in Ubuntu.

hostlua_make.patch

407b

waterwingz

nafraf
Yes, it seems to be an issue with the host environment. This patch seems to solve problem in Ubuntu.

Awesome! Works now for me - fedora17 64 bit system.

reyalp

nafraf
Yes, it seems to be an issue with the host environment. This patch seems to solve problem in Ubuntu.

Checked in on the trunk, should be harmless on systems that don't need it.

philmoz

reyalp

nafraf
Yes, it seems to be an issue with the host environment. This patch seems to solve problem in Ubuntu.

Checked in on the trunk, should be harmless on systems that don't need it.

Still didn't work on Hacki's toolchain (64 bit Linux).
Nafraf's patch does work - the '-lm' needs to go after the object file names (patched in rev 2716).

Phil.

waterwingz

The lua interpreter created by hostlua/make is now running. However, I'm stumped on how to get it to work when there is a require directive in my code.

require "drawings"

gives me :
[tt]lua: emu.lua:554: error running testpgm.lua testpgm.lua:47: module 'drawings' not found:
no field package.preload['drawings'][/tt]

The regular lua on my PC has a long path it searches ( print(package.cpath) ) but the with hostlua version that variable shows up as "nil". Somehow the hostlua version must need an environment setup but how?

(I have the CHDK files all loaded in a subdirectory "A/" in the same directory as the hostlua interpreter.)

msl

A 'A\' environment is ok. 'require' does not work with hostlua. We found out this:

require("propcase") leads to an error.

require("GEN/propset"..tostring(get_propset())) works.

The attached file is an advanced Lua emulation file, emu.lua. So you can test more camera dependent functions.

msl

emu.lua

12.32KB

waterwingz

msl
A 'A\' environment is ok. 'require' does not work with hostlua. We found out this:

require("propcase") leads to an error.

require("GEN/propset"..tostring(get_propset())) works.

Thanks for the hints but when I insert that exactly as written I still get :

[tt]lua: emu.lua:554: error running testpgm.lua testpgm.lua:46: module 'GEN/propset4' not found:
no field package.preload['GEN/propset4']
[/tt]

msl
The attached file is an advanced Lua emulation file, emu.lua. So you can test more camera dependent functions.

I also found that emu.lua on the CHDK-DE forum. I've started adding to it as well - get_IS_mode() for example.

It might be good to add it to the chdk svn tree somewhere so we can version control additions ?

reyalp

philmoz
Still didn't work on Hacki's toolchain (64 bit Linux).
Nafraf's patch does work - the '-lm' needs to go after the object file names (patched in rev 2716).

Ah right, some GCCs are more sensitive about the order. -lm at the end fixed it for my linux x64 toolchain 😳

msl
require("propcase") leads to an error.

require("GEN/propset"..tostring(get_propset())) works.

It would be good to identify why and fix this, rather than requiring changes in the scripts.

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