Well I have entered an area of partial insnity... ;o)
Below is a photo of the 'ALTDC' board for AudioScope.sh...
I have decided to incorporate all three methods for obtaining DC into this MBP via the MIC input.
1) VFO.
2) CHOPPER.
3) COUNTER.
The controller for the COUNTER is not yet done but this board can now do 1) and 2).
I have started properly coding for the VFO section first but and I have decided just to do an accuracy of 4 bit depth for this. That is 0 - +2V to an accuracy of 0.125V.
I have an example basic piece of code that checks ranges of values so as to create each of the 16 values possible. The problem is it is ugly and 16 conditional "if"s is not the way to go. Again I can't find any info how to create a look up table where each lookup is a range of values. The EXAMPLE code below DOES work mighty fine but looks so ugly and primitive.
Any other ideas guys?
This simulates 2 bit depth but looks SOOO ugly...
Now the photo...
Top Left:
The CHOPPER with the option of the diode DC offset removing the blue link.
Bottom Left:
The 9V PP3 input to 5.1V supply.
Middle:
4 transistor VFO used for the first part of the DC code.
Top Right:
The VFO test circuit using the two black links connected and transistor input for measurement when links disconnected.
Bottom Right:
3 terminals, top terminal multivibrator output for 3) and for detection.
Middle terminal for the DC input.
Bottom terminal is one of the ground terminals.
To keep this simple it took some working out...
I can't as the real values will eventually be determined by trial and error on the initial build and calibration phases. the V to F relationship is none linear and will range from about 700Hz to 2800Hz; (anywhere in that region depending on the voltage).
As I have pointed out the longhand method works but it is not a lookup table and looks mighty ugly...
Each of the 16 possible values will have its own frequency range as its lookup.
Here is your script with two additional ways to produce the same results. Maybe you'll like one of these alternatives better than your current code...
All of these could be simplified considerably if you know that $num will expand to a number within your known ranges. All of these will fail if $num does not expand to a numeric string.
This User Gave Thanks to Don Cragun For This Post:
It was the array method I wanted but I couldn't get my version to work.
I will try your version out tonight when I am home from work...
And yes, $num will AWLAYS be an integer number that will default to 0, (zero), before any call.
I will code for errors anyhow...
Again thanks, I will let you know how I get on...
Bazza.
---------- Post updated at 09:13 AM ---------- Previous update was at 07:49 AM ----------
Hi Don...
(Oops, at work.)
You are a star...
DEMO code that works, I couldn't work my own out...
This will be modified to suit my requirements in AudioScope.sh...
Results just as I require.
Speaking about your earlier code, which you won't need any more but might be interested in anyways:
What you do here is: call /usr/bin/test with the arguments "$num -ge 100" and - if this returns TRUE - call /usr/bin/test again with the arguments "$num -le 199". You can save one open process by calling test once instead of twice because test is able to do logical calculations itself:
You can even manipulate operator precedence by using brackets:
It was the array method I wanted but I couldn't get my version to work.
I will try your version out tonight when I am home from work...
And yes, $num will AWLAYS be an integer number that will default to 0, (zero), before any call.
I will code for errors anyhow...
Again thanks, I will let you know how I get on...
Bazza.
---------- Post updated at 09:13 AM ---------- Previous update was at 07:49 AM ----------
Hi Don...
(Oops, at work.)
You are a star...
DEMO code that works, I couldn't work my own out...
This will be modified to suit my requirements in AudioScope.sh...
Results just as I require.
You probably either want to make the final echo dependent on having found a value in range, or clear the value of V at the start of processing each time through the loop. I would probably just change the lines:
to:
I'm also not sure that this will print what you wanted if you enter a value >= the last entry in the range_lows[] array. (And, I don't know what you want in that case.) Note that in your original code, 100 was the lowest expected value, 499 was the highest expected value, and the code didn't produce any output for out of range values.
This User Gave Thanks to Don Cragun For This Post:
AudioScope Project.
(Apologies for any typos.)
For the few following......
AudioScope.sh...
Now at Version 0.60.00.
Well this baby has come a long way since its inception in January 2013. It is now at Version 0.60.00. It is MUCH more Apple centric now with a new OSX Sierra minimum _silent_... (7 Replies)
Using AudioScope.sh on Ubuntu 17.04 from a live DVD disc I came across an error.
Consider the code below it is a MUCH shortened version of the KEYBOARD input in AudioScope.
#!/bin/bash
bash --version
uname -a
status=0
KEYBOARD()
{
read -r -p "Enter QUIT or EXIT to quit:- " kbinput
if ||... (11 Replies)
Hi all...
Apologies for any typos...
For those intersted in the AudioScope the next construction is finished.
I have not been totally idle but working out the hard stuff to be able to be very simple to build.
It is a single transistor simple timer that lasts for about 1.2 to 1.8 seconds.... (2 Replies)
Boy oh boy, with only a MONO mic input to use AudioScope gets much more difficult when the ALTDC board is included.
It needs, so far, two hits at the MIC input with a single hit at the HEADPHONE audio output.
The first at the highest practical resolution for the AC component and the second... (0 Replies)
Can please somebody tell me what could be the reason for the following error (Unix Motorola Server):
/usr/etc/ce3/s374: Board at address 0xff10000 not present - Entry skipped.
/dev/lpc2: I/O error
I already replaced the board 374 on the server, but I have the same problem.
Thank you! (1 Reply)
Development machine:- Standard MBP 13 inch, OSX 10.7.5...
GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin11)
Copyright (C) 2007 Free Software Foundation, Inc.
Scenario:- Audio capture for AudioScope.sh for CygWin without ANY third party installs.
I am trying my hardest to get a... (6 Replies)
Hi all...
Has _below_ ever been done in UNIX shell scripting before?
(I have done this easily in Python but this is using purely the shell.)
The DEMO version IS built and has been tested.
Pre-amble...
I now need at least one control pulse for the AudioScope.sh when in PURELY audio I/O mode,... (2 Replies)
Hi Admin and Staff...
Thanks for hosting AudioScope.sh on this site. I have had the biggest surprise of my life today.
This months issue of the UK Linux magazine "Linux Format" have done a small piece on the project.
Issue April 2014, LXF 182, page 65...
This I never expected and I... (1 Reply)
Discussion started by: wisecracker
1 Replies
9. Post Here to Contact Site Administrators and Moderators
Just a remark now the board has grown to considerable proportion. I see too little of an active hand(s) maintaning the boards, clipping away dead posts, moving posts that were created in the wrong forums etc. It's a bit tiring to see alot of threads ending in: this has been covered before, do a... (7 Replies)