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Author Topic: Audio player for Casio Prizm  (Read 24919 times)

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Offline MPoupe

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Audio player for Casio Prizm
« on: February 23, 2012, 03:55:14 am »
Hello,
I wrote simple program demonstrating audio output on Casio fx cg 20.
Usage:
create wav from your favorite music, PCM,11025 Hz,8 bit,mono and store to the calculator's flash memory as demo.wav.
Copy CGPlayerA.g3a from the attachment here too.
Run it.

As you can see the program is very simple, it uses safe part of the user's stack to load about 450KB of the wav file (so the file doesn't need to be larger). Then it converts the samples and outputs by syscalls.

To be improved:
- increase speed of COM port, 115200 (maximum for syscall) is too slow
- output data asynchronously.

Unfortunately I do not know CPU enough to do it. :-(

Can somebody help ?

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Offline SimonLothar

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Re: Audio player for Casio Prizm
« Reply #1 on: February 23, 2012, 09:13:02 am »
See fx_calculators_SuperH_based_10.chm
(http://ourl.ca/8207/238670).

Try topic: fx-CG20...Registers, MPU...Accessing the 3pin serial lines directly

Perhaps it helps.
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Offline DJ Omnimaga

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Re: Audio player for Casio Prizm
« Reply #2 on: February 23, 2012, 09:45:48 am »
I'll try later tonight MPoupe.
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Offline MPoupe

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Re: Audio player for Casio Prizm
« Reply #3 on: February 23, 2012, 10:13:05 am »
Quote from: SimonLothar on February 23, 2012, 09:13:02 am
See fx_calculators_SuperH_based_10.chm
(http://ourl.ca/8207/238670).

Try topic: fx-CG20...Registers, MPU...Accessing the 3pin serial lines directly

Perhaps it helps.
Thank you, of course I use your manual :-)
I will try to use 7730.h header (http://pastebin.com/xiyV8CZs)
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Offline SimonLothar

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Re: Audio player for Casio Prizm
« Reply #4 on: February 23, 2012, 11:55:35 am »
Quote from: MPoupe on February 23, 2012, 10:13:05 am
I will try to use 7730.h header (http://pastebin.com/xiyV8CZs)
Be careful with this. 7730 register addresses and bit-assignments are not necessarily compatible with the 7305.
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Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #5 on: February 23, 2012, 04:58:55 pm »
Sound like a cool Idea. Might try it later. I did it and it is really quiet to my ears. Good enough for me though.  ;D ;D ;D ;D ;D ;D
« Last Edit: February 23, 2012, 05:27:04 pm by Spenceboy98 »
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Offline Yeong

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Re: Audio player for Casio Prizm
« Reply #6 on: February 23, 2012, 06:37:56 pm »
Does it work for cg10?
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Offline Juju

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Re: Audio player for Casio Prizm
« Reply #7 on: February 23, 2012, 06:43:08 pm »
I'll try. Yay my Prizm could be a wav player. Also is it hard to implement some sort of OGG/MP3 compression?
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Offline helder7

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Re: Audio player for Casio Prizm
« Reply #8 on: February 23, 2012, 07:15:11 pm »
only one ear gives sound, like fx9860?

the volume is the same as 9860 or is lower?


I can only test the player at the weekend, because now I have no headset compatible.


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Re: Audio player for Casio Prizm
« Reply #9 on: February 23, 2012, 07:55:45 pm »
It works fine on the fx-CG10. There's a lot of interferences though, and it stops just before the first chorus of Never Gonna Give You Up.
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Offline DJ Omnimaga

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Re: Audio player for Casio Prizm
« Reply #10 on: February 23, 2012, 08:24:58 pm »
Ok I tried it and I was surprised because the volume is much louder than on the FX-9860G and the TI-84 Plus it seems. :O

There is a bit more noise than on those devices, but it's not too bad on my side it seems. And yeah I had the sound stopping issue too. I loaded in a 1:27 song and it stopped around 30 secs.

Btw I like how much easier it is to listen to calc music with this software than it was with other calc ones. On the 84+ you must open command prompt to convert a wav file to 8xk and stuff like that, and on the 9860G you must use an annoying linking software (FA-124). On the Prizm we don't even need to change the wav extension.

Good job so far. :)
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Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #11 on: February 23, 2012, 09:19:44 pm »
Yes I agree. It is a lot easier. NO MORE HASSLE! It does stop after 30 seconds. That part disappointed me. :( Hopefully he can fix that.
« Last Edit: February 23, 2012, 09:23:28 pm by Spenceboy98 »
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Offline TIfanx1999

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Re: Audio player for Casio Prizm
« Reply #12 on: February 23, 2012, 09:23:46 pm »
Hmm... looks cool. I'll have to give it a try when I have a moment. :D
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Offline DJ Omnimaga

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Re: Audio player for Casio Prizm
« Reply #13 on: February 23, 2012, 09:25:06 pm »
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Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #14 on: February 23, 2012, 09:38:25 pm »
Video Response: Do you have a CG 10 or a CG 20? I have a CG10 and it isn't that good.
« Last Edit: February 23, 2012, 09:48:19 pm by Spenceboy98 »
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