Shell Programming and Scripting

Hi Corona688...

You are correct of course WRT security but I don't expect very many people to be interested in what I code for, and, that any computer used to test said code to be internet enabled, etc. I will change the "777" to "600" in the not too distant future, however in the meantime I will be working on _line_drawing_ the plotted points joining them up.

Your assistance with the config file is next though. ;o)

That should be done over the WE.
Then working out a simple speudo-sync/trigger idea, +ve going, -ve going, equal to and _free_ running.

Then the tougher stuff starts... ;oO

---------- Post updated 23-03-13 at 11:12 AM ---------- Previous update was 22-03-13 at 07:00 PM ----------

Don't know how this got edited my upload should be a new one...

---------- Post updated at 11:25 AM ---------- Previous update was at 11:12 AM ----------

The next stage of the shell AudioScope.sh fun project.

I am not sure how many are actually following this thread but at least one person is. ;o)

Hi Corona688, I have changed "chmod 777 <somefile>" permissions now.

Still using "/tmp" FTTB as my machine clears out all files per reboot; good news as it saves me the aggro and proves whether the next bit below works or crashes out...

Your steering me to do a config file the correct way made life SOOOO easy, except, I HAD to use an "else" sub-statement, ARGH, I didn't want to use "else"'s but hey I am game for anything... ;oD

So Corona688 many thanks for your input so far.

The latest version with an AudioScope.config file generated and auto-saved on script exit...

We now have a pseudo vertical shift control. Just type SHIFT at command mode and press "U" or ''D" to shift up or down 4 text lines from the centre. Press <CR> to do a rescan in HOLD mode...

Now decisions, decisions; do I use the real 8 bit grab for SYNC/TRIGGER points or the 4 bit quantised values?

Toying with this ATM...

Here is the latest incarnation of AudioScope.sh...

Enjoy...

The Terminal Title bar now includes the program name:- "Shell AudioScope."

Start of a DRAWing routine to join up the plotted points.

The function is just a NOP at the moment but will be finished for the next upload.

Added 4 small photos of the circuit at the end of the script...

The command DRAW facility is now finished. The attached image is a whistle into the Macbook Pro microphone with the Timebase TBVAR command set to tart 10 bytes in with a jump of 3 bytes.

I.E. the TB set to 10 along and the same as 500uS/DIV...

The next upload will be sorting out the Pseudo-sync/Trigger and may take a while as I am in the middle of a simple vertical calibrator using the sinewave generator at the start of the script.

This is now functional and entirely in very basic shell concepts...

Enjoy...

I must say that looks fantastic. Amazing what you can do in shell when you've got the right tools.

Hi Corona688...

Thanks a lot, coming from you that is indeed a compliment...

BTW, the script is still in its infancy there is still a lot I want to do, but, is there a limit to a script file size before it fails to run?

Again thanks for the compliment...

Practically speaking, no. It could be megabytes large and still work. The 'configure' shell scripts that come with source packages these days are flipping enormous and getting bigger all the time.

Of course, if it's megabytes large, there's probably things that can be slimmed down too. I really ought to get around to testing this before I start offering more advice than I have though.