Simple Sound Effects 2.0 [130209]

Here is a simple, little circuit that makes loud, useless noises with an ATtiny45 programed in Bascom-AVR.

In the May 1979 edition of Elektor we published a “Simple Sound Effects” unit. The author was rightly proud of the design which used a CD4040 counter, a CD4049 Hex inverter and a few odds and ends. Anyone who considered building the circuit all those years ago will be happy to know that a newer version is now available. Thanks to the marvels of modern technology we can now make the same sort of racket but with fewer components. That’s progress!

What we can’t see from the circuit diagram is how much hardware and wiring of the original design containing counters and inverters has been saved. The 21st century version does the same job in software and uses little more than just an 8-pin ATtiny45 microcontroller instead of the clever feedback counter design of the original circuit.

The design also uses a single transistor buffer at the output to increase the level of annoyance produced from the small 8-Ω loudspeaker.

A trimpot is included in the design to give some degree of frequency adjustment of the generated rumpus.

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For those who don't like microcontrollers or who just want to play aroud with logic and other classic components, attached below is the original design.

Project Elements

79077-4.PNG (PNG, 33.92 KB)

79077-3.PNG (PNG, 15.06 KB)

79077-2.PNG (PNG, 18.24 KB)

79077-1.PNG (PNG, 5.36 KB)

130209-11 Bascom AVR code + hex (ZIP)

130209-11 Bascom AVR code + hex file

Discussion (2 comments)

Alectronic 7 years ago

I managed to program the assumably in Bascom made and generated Tiny AVR chip. And it works.

But strangely the presented Bascom listing only produces shortage on memory errors in Bascom that makes it impossible to program the AVR chip from it? Or to generate any usefull Hex file from it because of it.

Only the given Hex file worked. And even the given configuration fuses do not match that of Bascom? Also the setup frequency was different.

Why call het a Bascom program when the author obviously must have used another program that also explains the difference in configuration fuses?
What is the reason of this?

Alectronic 7 years ago

Sorry that I asked, but I did just ask legit questions Clemens. And I never meant to be rude.
And you did see as a fact that there were two errors in the .err and .rpt files after I compiled YOUR code. Which for some reason I still do not understand you did not have in yours?
I neither changed any of the Bascom settings in my compiler that would explain the differences between your free and my licenced version. I have no clue why that happened.
Also because I recently just installed the latest downloaded compiler version without changing anything whatsoever!
I therefore probably will not use Bascom much anymore because it is always a pain in the butt to configure the fuses and settings correctly.
(Once it took me a couple of months before I finally found out why my Amigadisk-to-SD -card-copier just didn't work in Bascom. Only because one or two fuses were set or unset wrong. That part in Bascom seems very unclear if not buggy, and a couple of well known USB programmers always refused to work together with the matching USB driver settings in the program. It was only until I bought a perfect SANA programmer on TINDIE that it finally was solved and now works everytime!).
Anyway I feel unhappy about the way I'm called rude especially because I never used any inappropriate words and my answer still isn't solved either. As a paying Gold card Elektor member for me there are no FREE projects. But they will after I have ended my membership in 2018 after many years. They say there are no stupid questions, only stupid answers.

ClemensValens 7 years ago

Comparing your RPT file to mine, I noticed that your compiler options are not like mine. My compiler settings are default out of the box, your settings are probably not (your LCD is on Port F, mine is on Port B; you have 32KB XRAM, I don't have any). I can't see which processor you have selected, but your stack sizes seem too big. I can't even get them that big.

This is from my RPT file:

Stack start  : 15F hex
Stack size   : 28 hex
S-Stacksize  : 10 hex
S-Stackstart : 138 hex
Framesize    : 20 hex
Framestart   : 108 hex
Space left   :  148  dec

This is from yours:

XRAM         : 8000 hex
Stack start  : 15F hex
Stack size   : 80 hex
S-Stacksize  : 40 hex
S-Stackstart : E0 hex
Framesize    : 80 hex
Framestart   : 20 hex
Space left   : -83  dec

As you can see, your space left is negative, mine is positive, which probably explains your problem.

So, I think the problem is not in the code, but in the way you have configured Bascom AVR.

About the fuses: I don't know why the article shows an image from Atmel Studio, probably because it looked nicer.

P.S. Please try to change your attitude a bit. You are requesting free support on a free project and you accuse me of leaving out information. Furthermore, you are aggressive. I think you are rude and I will probably no longer help you.

Alectronic 7 years ago

Clemens, before I forget to mention this: even if the Hex file was correctly produced despite those errors in Bascom-AVR that you probably just left out in your rapport, Bascom simply wouldn't let me flash that result into the ATtiny 45 chip because of it! And neither were the onfiguration fuses from Atmel Studio?

Alectronic 7 years ago

I hereby attach the Bascom generated rapport after trying to compile your file which failed!
You'll notice the Error : 22 Line : 56 Out of SRAM space , in your 'Bascom' Soundgen.err File that was reported, and also the High Baud rate error in line 56 in the Soundgen.rpt File.

My Elektor window didn't show the upload at first until I scrolled down. And there was no upload confirmation visible why I already had uploaded the file before. And removing those afterwards was not possible either.

Why compiling in Bascom fails. (13kb)
Why compiling in Bascom fails. (13kb)
Why compiling in Bascom fails. (13kb)
Why compiling in Bascom fails. (13kb)

ClemensValens 7 years ago

The compiler produces a report file .RPT, please post it. The best thing you can do is zip up your complete project folder and attach it to your comment. If you don't want to post anything, we cannot help you. We need your data to reproduce the problem, we don't have the problem with our data.

Alectronic 7 years ago

I also use version 2.0.7.5 but use the full licenced Bascom AVR version on my Windows 7 32 bit OS quad core PC.
Attaching my project file won't do any good because I did use yours.
And there is no output I can send you either because of the compiling error.

ClemensValens 7 years ago

The fact that you cannot make it compile doesn't make it less of a Bascom program. As I mentioned in my previous comment, the code attached to the project above compiles perfectly fine in Bascom-AVR 2.0.7.5 (free demo download from the MCS website) on my Windows 10 computer. I just tried it again without any problems.

Which Bascom AVR version you are using? Please attach your project + output so that we can inspect it.

Alectronic 7 years ago

Hi Clemens, I've retested the Bascom program that you attached previously.
It didn't make any difference and still gave the mentioned memory insufficient error.
Error:22 Line:56 Out of SRam space.

Sorry, but why call it a Bascom program when it turns out that it just doesn't compile in any way?

Alectronic 7 years ago

That wasn't the case Clemens. I already fixed the characters like you did. But still got a remaining chip memory shortage message at the end of the last line in Bascom that made successful compiling completely impossible.
And even the configuration fuses from Atmel Studio were different because they do not correspond with the results we should get in Bascom. Why not give the correct fuses like they should appear in Bascom? Screenshots from Atmel Studio didn't match that of Bascom and gave completely different results. Thank you for attaching the correct Bascom Basic listing. I will check it hoping to find the cause for the previous Bascom compiling error.

ClemensValens 7 years ago

It is a Bascom-AVR program. However, if you did a copy-paste from the PDF you will end up with a file containing characters that the Bascom compiler doesn't like. I have attached the cleaned-up & tested source code to the project above. It compiles without errors in Bascom-AVR 2.0.7.5.

The configuration fuses shown in the article is a screenshot are from Atmel Studio (as mentioned in the text).