ultimate source

[KOON3876]

Hi I rely on Microchip's library, function FSFindFirst() and FSFindNext().
It looks like folder: copied order, file: alphanumeric.

Library supports long file name so you don't have to limit file name length.
it shows 01merr~1.wav etc. (see dir /X on windows to see how filename reduced)

[EUVL]

Thx again.

Patrick

[starfire151]

I just found this forum while doing searches for audio codec. This is great!

KOON3876... thanks VERY much for posting your excellent work using the dsPIC33F. I've downloaded all your referred documents and have started looking at them.

I have a need to record as well as play back .wav files. I got a dsPIC Analog Development kit from Custom Computing Systems (www.ccsinfo.com) which uses a dsPIC33F128GP706 chip and has an SD card socket. It also uses a TLV320AIC32B audio codec chip on the front-end (back-end) for recording (playing back). I need to record two channels at CD quality (44.1KHz) for up to about two or three minutes and save the data as a .wav file to the SDHC card. I also need to be able to playback a .wav file into an external pair of speakers.

Has anyone else done anything like this?

Thanks.


Dave

[glt]

Hi,

I have not looked at the entire thread in detail, but this appears an open project as source code is available from Mr Koon.

There is a new dspic33 board for $40 at seeedstudio.com


I wonder we can adapt the project to this board

[KOON3876]

It looks great

I'm not sure but there are connector, for RB4,5,6,7 (Remappable Pin RP4,5,6,7).
So I2S signals can be remapped to these pins.
For LCD and keypad : you need external controller. (or, USB serial connected PC etc)
Clock: For audio, need accurate 11.2896MHz, to Pin 30/31. but already used by ETH controller. ETH_INT signal should be routed to somewhere.

So MAYBE you can use this board with some hardware modification and large firmware modification.

[KOON3876]

Originally Posted by qusp

so are these boards available? i'm very interested in building a couple.

Hi I'm using ExpressPCB (free CAD/dedicated factory), can not post CAD file but if you need I can eMail.

[glt]

Originally Posted by KOON3876

It looks great

I'm not sure but there are connector, for RB4,5,6,7 (Remappable Pin RP4,5,6,7).
So I2S signals can be remapped to these pins.
For LCD and keypad : you need external controller. (or, USB serial connected PC etc)
Clock: For audio, need accurate 11.2896MHz, to Pin 30/31. but already used by ETH controller. ETH_INT signal should be routed to somewhere.

So MAYBE you can use this board with some hardware modification and large firmware modification.

Sounds doable, but right now it is over my head. Just graduating to Arduino stuff :-). Since it has ethernet, maybe a web GUI instead of LCD and keypad...

[jkeny]

Nice looking board but how much work is needed to modify hardware/software, I wonder?

[EUVL]

Hi,

Been a while. Hope you are still watching.
I have a question regarding an extra push button for display ON/OFF via software command to LCD controller.
Please see PM. You may of course also answer on the forum.

Any hints most appreciated.

BR,
Patrick

[vzs]

Hi!
Congrat for the project, very nice!
I was thinking if could be possible to interface an IDE hard drive to the SD card slot through two adapters:
an IDE to USB and USB to SD card ?

What do you think? Can it work?
Thanks,
Zsolt