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'[PIC] dsPIC for audio'
2011\08\03@114856 by Oli Glaser

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Hi all,

I have a rough idea I want to test, which requires basic DSP of audio.
Ideally I would like to be able to do it quickly/easily, so a uC with ADC, DSP and DAC would be useful.
Through hole would be good for even easier throwing together, but not too important - e.g. input -> opamp -> uC -> opamp -> output.
The resolution, sampling rate are not too important, just something that does basic audio processing for quick proof of concept, then I can look at switching to e.g. FPGA or faster DSP uC later on)
 I do have a couple of dsPICs here, but with no on board DAC which would be very convenient.
I'm ordering some other stuff right now so quick comments on the best dsPIC for the job would be appreciated - so the question is are there any latest offerings I should be aware of?

2011\08\03@115846 by Michael Watterson

face picon face
On 03/08/2011 16:48, Oli Glaser wrote:
> Hi all,
>
> I have a rough idea I want to test, which requires basic DSP of audio.
> Ideally I would like to be able to do it quickly/easily, so a uC with
> ADC, DSP and DAC would be useful.
> Through hole would be good for even easier throwing together, but not
> too important - e.g. input ->  opamp ->  uC ->  opamp ->  output.
> The resolution, sampling rate are not too important, just something that
> does basic audio processing for quick proof of concept, then I can look
> at switching to e.g. FPGA or faster DSP uC later on)
>    I do have a couple of dsPICs here, but with no on board DAC which
> would be very convenient.
> I'm ordering some other stuff right now so quick comments on the best
> dsPIC for the job would be appreciated - so the question is are there
> any latest offerings I should be aware of?
>
>

Test idea with a PC and sound card

2011\08\03@130947 by Oli Glaser

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On 03/08/2011 16:57, Michael Watterson wrote:
> Test idea with a PC and sound card.

Good idea, thanks - I considered this but unfortunately I *think* the latency would be too long that way. I need the input to output time to be pretty immediate (<1ms)
Not sure how the latest standard soundcards/drivers pan out, but when I was doing a lot of recording I remember this was a problem, and if one wanted e.g. to monitor their recordings without an echo effect you needed a professional card (we used M-Audio cards) I recall even the latest SoundBlaster (Audigy?) not being up to the job.
I would be interested to hear thoughts on the current state of affairs regarding the above though.

2011\08\03@140205 by Matt Bennett

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On Wed, August 3, 2011 10:48 am, Oli Glaser wrote:
> Hi all,
>
> I have a rough idea I want to test, which requires basic DSP of audio.
> Ideally I would like to be able to do it quickly/easily, so a uC with
> ADC, DSP and DAC would be useful.
> Through hole would be good for even easier throwing together, but not
> too important - e.g. input -> opamp -> uC -> opamp -> output.
> The resolution, sampling rate are not too important, just something that
> does basic audio processing for quick proof of concept, then I can look
> at switching to e.g. FPGA or faster DSP uC later on)
>   I do have a couple of dsPICs here, but with no on board DAC which
> would be very convenient.
> I'm ordering some other stuff right now so quick comments on the best
> dsPIC for the job would be appreciated - so the question is are there
> any latest offerings I should be aware of?

The dsPIC33FJ128GP802 is available in 28pin DIP- it has a 100K sps dual
channel DAC.

Matt Bennett
Just outside of Austin, TX
30.51,-97.91

The views I express are my own, not that of my employer, a large
multinational corporation that you are familiar with

2011\08\03@140920 by Electron

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At 19.09 2011.08.03, you wrote:
>On 03/08/2011 16:57, Michael Watterson wrote:
>> Test idea with a PC and sound card.
>
>Good idea, thanks - I considered this but unfortunately I *think* the
>latency would be too long that way. I need the input to output time to
>be pretty immediate (<1ms)
>Not sure how the latest standard soundcards/drivers pan out, but when I
>was doing a lot of recording I remember this was a problem, and if one
>wanted e.g. to monitor their recordings without an echo effect you
>needed a professional card (we used M-Audio cards) I recall even the
>latest SoundBlaster (Audigy?) not being up to the job.
>I would be interested to hear thoughts on the current state of affairs
>regarding the above though.

The problem is more related to Windows and its multitasking than to sound
card drivers' latency (which is an added problem anyway).

I.e. even having a zero latency sound card, are you sure you can use the
CPU uninterrupted for more than 1 ms? I don't think so.. not on Windows.

Cheers,
Mario


>
>
>
>

2011\08\03@140938 by Oli Glaser

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I went ahead and grabbed a  DSPIC33FJ64GP802 (DIP version) as I need the rest of the order as soon as and therefore wanted to place before 5pm here.
Also grabbed a PIC24HJ64GP202, and a couple of 24-bit Wolfson DACs (WM8524 and WM8523) for good measure.
Microchips website and product search tool is not the best for figuring out what's what (e.g. new, with feature x, etc) so I just picked at random one that appeared to have an onboard 16-bit DAC and Codec peripheral..
Still interested in hearing about other DSP capable uCs though, even non-PIC or FPGA tools (e.g MATLAB/Scilab HDL DSP tools, etc)

2011\08\03@141431 by Oli Glaser

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On 03/08/2011 19:02, Matt Bennett wrote:
> The dsPIC33FJ128GP802 is available in 28pin DIP- it has a 100K sps dual
> channel DAC.

Thanks - that suggests my somewhat random choice wasn't too far out then as I went with the dsPIC33FJ64GP802 (the same just with less memory I think)
I'm guessing this is one of the newer dsPICs? (as I can't remember seeing it last time I looked for one)

2011\08\03@142442 by Oli Glaser

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On 03/08/2011 19:09, Electron wrote:
> The problem is more related to Windows and its multitasking than to sound
> card drivers' latency (which is an added problem anyway).
>
> I.e. even having a zero latency sound card, are you sure you can use the
> CPU uninterrupted for more than 1 ms? I don't think so.. not on Windows.

Yes, I forgot to mention that bit too..
However, although I'm sure the above certainly will be part of the problem given the nature of WIndows, I do remember the M-Audio card we used with Win 2K had almost no latency (i.e. not audible, no cutouts)
I think it was around 1 or 2ms max, with some quite hefty software effects running on Cubase too.
Compared to some of the SoundBlaster offerings with quite noticable latency (same software, only card changed), this is what led me to think that the card and drivers have (or at least had then) some significant effect.

2011\08\03@155146 by Matt Bennett

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On Wed, August 3, 2011 1:14 pm, Oli Glaser wrote:
> On 03/08/2011 19:02, Matt Bennett wrote:
>> The dsPIC33FJ128GP802 is available in 28pin DIP- it has a 100K sps dual
>> channel DAC.
>
> Thanks - that suggests my somewhat random choice wasn't too far out then
> as I went with the dsPIC33FJ64GP802 (the same just with less memory I
> think)
> I'm guessing this is one of the newer dsPICs? (as I can't remember
> seeing it last time I looked for one)

Yes, that part is in the same family- It's the newest dsPIC with a DAC,
but not all that new- I remember the *AWESOME* project I ordered it for
when the part was brand new- the date on the (unopened) box that the PIM
is in is dated July 16, 2008.

doh!

Matt Bennett
Just outside of Austin, TX
30.51,-97.91

The views I express are my own, not that of my employer, a large
multinational corporation that you are familiar with

2011\08\03@162624 by Michael Watterson

face picon face
On 03/08/2011 19:09, Oli Glaser wrote:
> I went ahead and grabbed a  DSPIC33FJ64GP802 (DIP version) as I need the
> rest of the order as soon as and therefore wanted to place before 5pm here.
> Also grabbed a PIC24HJ64GP202, and a couple of 24-bit Wolfson DACs
> (WM8524 and WM8523) for good measure.
> Microchips website and product search tool is not the best for figuring
> out what's what (e.g. new, with feature x, etc) so I just picked at
> random one that appeared to have an onboard 16-bit DAC and Codec peripheral.
> Still interested in hearing about other DSP capable uCs though, even
> non-PIC or FPGA tools (e.g MATLAB/Scilab HDL DSP tools, etc)
>

However depending on number of samples needed, filters etc, DSP inherently has some latency

2011\08\03@191235 by John Ferrell

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On 8/3/2011 11:57 AM, Michael Watterson wrote:
> Test idea with a PC and sound card. I am also interested in such a project but strictly for self education.
My big problem has been that I have not been able to find much documentation on the various soundcard interfaces.

I do have an M-Audio card that I have used with some Ham radio software.

Any pointers are appreciated.

At the moment I am planning an 18F Pic and an external Dac. Not likely to be a great success, but I might learn something...

--
*John Ferrell W8CCW*

**Men never do evil so completely and cheerfully as when they do it from a religious conviction. <http://www.quotationspage.com/quote/27619.html>

*/--Blaise Pascal/*//

**

**

2011\08\03@195513 by Oli Glaser

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On 04/08/2011 00:11, John Ferrell wrote:
> I am also interested in such a project but strictly for self education.
> My big problem has been that I have not been able to find much
> documentation on the various soundcard interfaces.
>
> I do have an M-Audio card that I have used with some Ham radio software.
>
> Any pointers are appreciated.
>
> At the moment I am planning an 18F Pic and an external Dac. Not likely
> to be a great success, but I might learn something...

Would help to know a little more about what you are planning - roughly what do you need the PIC to do?
(e.g. compression, noise reduction, effects, voice recognition, plain recording/playback)
Also, you mention the M-Audio card, and also a DAC - are you wanting the sound to come from/go to the PC or it to be based just around the PIC?
What resolution do you need for the samples and what sampling rate, and how much latency (if relevant) is OK? bandwidth needed - e.g. 20Khz, 10Khz? (e.g. for voice/music/beeps)
Sorry for so many questions :-)




2011\08\03@204111 by IVP

face picon face
> At the moment I am planning an 18F PIC and an external DAC. Not
> likely to be a great success, but I might learn something...

I don't see why it wouldn't be OK. The dsPIC33F..802 might be self-
contained but you have the learning curve of becoming familiar with it

However.....

Several of my projects over the last few years included 16F/18F and
DAC / CVSD. Data was sourced from external EPROM / SDRAM.
Only in the past year am I moving to the 33F, sourcing data from USB
and SDHC cards. Generally because (1) I feel I *should*, to stay in the
game, (2) large external NVM is comparitively cheap now, and (3) plug-
in memory with PC-written files is much more user-friendly than updating
limited-capacity (and expensive) EPROM or SDRAM

The end quality is pretty much the same (to my ear in many applications
anyway). Hardly CD, but 14/16-bit is adequate

Not that you can't do any of that with an 18F of course, but it's a good
excuse / reason to try the 33F

Jo

2011\08\04@065917 by alan.b.pearce

face picon face
> At the moment I am planning an 18F Pic and an external Dac. Not likely
> to be a great success, but I might learn something...


I suspect that it would be more interesting to get a sample dsPic similar to the one already mentioned in this thread. You are then more likely to have some success, whereas I suspect using an 18F will run you down the path of frustration, even if you do manage some success.

Consider the 128k memory device already mentioned, and the free C30 compiler, even with no optimisation will take a fair amount of code to fill that chip - and the sample and compiler can all be had for free.


-- Scanned by iCritical.

2011\08\04@072652 by alan.b.pearce

face picon face
> Yes, that part is in the same family- It's the newest dsPIC with a DAC,
> but not all that new- I remember the *AWESOME* project I ordered it for
> when the part was brand new- the date on the (unopened) box that the PIM
> is in is dated July 16, 2008.
>
> doh!

The datasheet has just been updated to Rev F, according to the revision list Rev A of the datasheet came out in Sept 2007 ...

http://ww1.microchip.com/downloads/en/DeviceDoc/70292F.pdf



-- Scanned by iCritical.

2011\08\04@073550 by alan.b.pearce

face picon face
> I suspect that it would be more interesting to get a sample dsPic similar to the one
> already mentioned in this thread. You are then more likely to have some success,
> whereas I suspect using an 18F will run you down the path of frustration, even if
> you do manage some success.
>
> Consider the 128k memory device already mentioned, and the free C30 compiler, even
> with no optimisation will take a fair amount of code to fill that chip - and the
> sample and compiler can all be had for free.

Depending on your skills, you may also like to look at the libraries that Microchip have for doing dsp type processing. They have recently updated a heap of them, and downloads are available from the 'whats new/software' page at http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=103

I don't know, off hand, where these normally hide in the microchip site, but following the development tools or other links in that area would probably also find them.


-- Scanned by iCritical.

2011\08\08@093710 by John Ferrell

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On 8/3/2011 7:54 PM, Oli Glaser wrote:
> Would help to know a little more about what you are planning - roughly
> what do you need the PIC to do? (e.g. compression, noise reduction,
> effects, voice recognition, plain recording/playback) Also, you
> mention the M-Audio card, and also a DAC - are you wanting the sound
> to come from/go to the PC or it to be based just around the PIC? What
> resolution do you need for the samples and what sampling rate, and how
> much latency (if relevant) is OK? bandwidth needed - e.g. 20Khz,
> 10Khz? (e.g. for voice/music/beeps) Sorry for so many questions :-) My objective is to learn what I can about Digital signal processing and FFT. My real hobby in retirement is studying. I suspect that if I could find the details of the implementation of any PC soundcard I could bypass using a PIC at the moment.

The M-Audio card is impressive when used to process the I-Q signals for a software defined radio. (Google "softrock").
It allows a bandwidth in this application of about 190 khz. Latency seems to be an issue with any DSP.

If I find the details of its windows or Linux implementation I will pursue the M-Audio path. In the meanwhile, I will have to work with the PIC A->D->A setup because that is what I can grasp!
I also have a TI Piccolo Stick that may be better suited to the task but it looks like a steep learning curve. I am old, my time is limited, both short term & long term!

There is no product to develop, there is no commercial interest on my part. There are many commercial products in Amateur Radio that are reasonable in cost and awesome in performance. I may never reach the desired level of understanding but that is not a problem... the fun is in the pursuit!

-- John Ferrell W8CCW Nothing sucks more than that moment during an argument when you realize you're wrong.

2011\08\08@193045 by Oli Glaser

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On 08/08/2011 14:35, John Ferrell wrote:
> My objective is to learn what I can about Digital signal processing and
> FFT. My real hobby in retirement is studying. I suspect that if I could
> find the details of the implementation of any PC soundcard I could
> bypass using a PIC at the moment.

Ah I see, the endless pursuit of knowledge..
Regarding the PC soundcard, I did a little research into how easy it was to process and manipulate sound in .Net a while back. Although I only skimmed the surface I discovered implementing the maths, graphics (if necessary) was easy enough, but the ever present problem (with implementing more involved tasks fully on a PC) is that of no access/control of low level processes or timing without some some difficulty.

FFTW (Fastest Fourier Transform in the West) is a useful library to know about:
http://www.fftw.org/
Here is a link on more FFT stuff too:
http://www.jjj.de/fft/fftpage.html
Some useful DSP related info:
http://www.dspguru.com/dsp/links/online-books
http://www.dspguide.com/pdfbook.htm

> The M-Audio card is impressive when used to process the I-Q signals for
> a software defined radio. (Google "softrock").
> It allows a bandwidth in this application of about 190 khz. Latency
> seems to be an issue with any DSP.

I had a look - there seems to be about 3 different sites which the owner is in the process of shuffling about so it was a little confusing!

> If I find the details of its windows or Linux implementation I will
> pursue the M-Audio path. In the meanwhile, I will have to work with the
> PIC A->D->A setup because that is what I can grasp!

That was the problem I mentioned finding above with a "standard" on board sound unit, but I thinking there must be some cards out there that are commonly used for SDF and have the lower levels detailed and usable?
I don't know anything much about SDF (although I'd like to have a go myself if time allows at some point) but I'd imagine the PIC based setup might be a good place to start as you won't have all the quirks of an operating system to worry about, plus you will have a lot more control over timing - maybe grab a dsPIC dev board?
I bet this would be good application for FPGAs/CPLDs if you really want to delve deeper into the DSP logic implementation side.

> I also have a TI Piccolo Stick that may be better suited to the task but
> it looks like a steep learning curve. I am old, my time is limited, both
> short term&  long term!
>
> There is no product to develop, there is no commercial interest on my
> part. There are many commercial products in Amateur Radio that are
> reasonable in cost and awesome in performance. I may never reach the
> desired level of understanding but that is not a problem... the fun is
> in the pursuit!

Sounds like a worthy and enjoyable challenge. Things often turn out quite well when undisturbed by any commercial interests - and indeed as you say, the journey is the reward. I hope you have lots of fun on the way...
From what you have put forward, maybe you should pursue the option(s) that interest(s) you most, then simply deal with issues as they arise. If there is no deadline or initial specification/solid goal, then (if finance permits) you can forage ahead and change course at a later date if necessary.

2011\08\08@193441 by Oli Glaser

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Forgot one link:
http://www.redcedar.com/learndsp.htm

2011\08\08@200507 by Xiaofan Chen

face picon face
On Wed, Aug 3, 2011 at 11:48 PM, Oli Glaser <spam_OUToli.glaserTakeThisOuTspamtalktalk.net> wrote:
> Hi all,
>
> I have a rough idea I want to test, which requires basic DSP of audio.
> Ideally I would like to be able to do it quickly/easily, so a uC with
> ADC, DSP and DAC would be useful.
> Through hole would be good for even easier throwing together, but not
> too important - e.g. input -> opamp -> uC -> opamp -> output.
> The resolution, sampling rate are not too important, just something that
> does basic audio processing for quick proof of concept, then I can look
> at switching to e.g. FPGA or faster DSP uC later on)
>  I do have a couple of dsPICs here, but with no on board DAC which
> would be very convenient.
> I'm ordering some other stuff right now so quick comments on the best
> dsPIC for the job would be appreciated - so the question is are there
> any latest offerings I should be aware of?
>

Some old stuff but can still be interesting.

dsPIC MP3 decoder:
http://www.pic24.ru/doku.php/en/mp3_dspic/ref/intro

dsPIC wav player
www.uchobby.com/index.php/2008/07/21/dspic-wav-player/
http://flyingpic24.com/3.html

dsPIC/ARM/PIC32 audio player (MOD, FLAC, etc)
http://www.k9spud.com/traxmod/



-- Xiaofan

2011\08\09@093938 by John Ferrell

face
flavicon
face
On 8/4/2011 6:59 AM, .....alan.b.pearceKILLspamspam@spam@stfc.ac.uk wrote:
>> At the moment I am planning an 18F Pic and an external Dac. Not likely
>> to be a great success, but I might learn something...
>
> I suspect that it would be more interesting to get a sample dsPic similar to the one already mentioned in this thread. You are then more likely to have some success, whereas I suspect using an 18F will run you down the path of frustration, even if you do manage some success.
>
> Consider the 128k memory device already mentioned, and the free C30 compiler, even with no optimisation will take a fair amount of code to fill that chip - and the sample and compiler can all be had for free.
>
>
I have downloaded the dsPIC33FJ128GP802 Datasheet and will investigate. I fear that if I follow this path it will take away the original focus and spawn a new project with a life and agenda of its own!

OTH, the digression does seem very interesting!

-- John Ferrell W8CCW
  Nothing sucks more than that moment
    during an argument when you realize you're wrong.

2011\08\09@121536 by John Ferrell

face
flavicon
face


There is no product to develop, there is no commercial interest on my
part. There are many commercial products in Amateur Radio that are
reasonable in cost and awesome in performance. I may never reach the
desired level of understanding but that is not a problem... the fun is
in the pursuit!

> Sounds like a worthy and enjoyable challenge. Things often turn out
> quite well when undisturbed by any commercial interests - and indeed as
> you say, the journey is the reward. I hope you have lots of fun on the way..
>   From what you have put forward, maybe you should pursue the option(s)
> that interest(s) you most, then simply deal with issues as they arise.
> If there is no deadline or initial specification/solid goal, then (if
> finance permits) you can forage ahead and change course at a later date
> if necessary.
>
>
Thanks to all for the great tips. Here is my reading list from this morning's PicList:

http://www.techmind.org/audio/#intro
http://www.sillanumsoft.org/
http://audacity.sourceforge.net/
http://www.redcedar.com/learndsp.htm
www.pic24.ru/doku.php/en/mp3_dspic/ref/intro
www.uchobby.com/index.php/2008/07/21/dspic-wav-player/
http://flyingpic24.com/3.html
http://www.k9spud.com/traxmod/

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DSPIC33FJ128GP802-I/SP-ND    Chip
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DV164033-ND    Audio-Video Presentations
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DM240001-ND  Dev Boards

http://ww1.microchip.com/downloads/en/DeviceDoc/PIC32_Brochure_USB_39904f.pdf    Starter kit, $50 & up
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en532453  Catalog Ref for above
http://ww1.microchip.com/downloads/en/DeviceDoc/61159B.pdf  Starter kit User Guide

At the moment I am leaning toward the $50 Starter kit. It works best for me to have a little seed to start with. I will read the last url first.

I am not good at maintaining a tight focus so even if I choose the Starter kit, I will work the rest of the list as time permits.

-- John Ferrell W8CCW
  Nothing sucks more than that moment
    during an argument when you realize you're wrong.

2011\08\09@131757 by alan.b.pearce

face picon face
> Thanks to all for the great tips. Here is my reading list from this
> morning's PicList:
> ....
> http://flyingpic24.com/3.html

You may like to pick up the book that is behind this website, as it is a complete introduction to programming the PIC24. It is available through Microchip, and I found it a good starting point for learning the C30 compiler.

It uses the Explorer16 as its hardware base, but as you are just looking to play around with things then the programs should be readily adaptable to any hardware you build. The website has various updates and corrections along with program updates for later chips which are slightly different to the PIC24FJ256GA110 PIM that it initially was programmed for.



-- Scanned by iCritical.

2011\08\09@135524 by John Ferrell

face
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Could you be more specific about the title please?
   Lots to study now!

On 8/9/2011 1:16 PM, alan.b.pearcespamKILLspamstfc.ac.uk wrote:
{Quote hidden}

-- John Ferrell W8CCW
  Nothing sucks more than that moment
    during an argument when you realize you're wrong.

2011\08\09@182228 by Brian Gregory

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face
In-Reply-To: <.....4E417425.9050606KILLspamspam.....triad.rr.com>

> Could you be more specific about the title please?
>     Lots to study now!
>
> On 8/9/2011 1:16 PM, EraseMEalan.b.pearcespam_OUTspamTakeThisOuTstfc.ac.uk wrote:
> >> Thanks to all for the great tips. Here is my reading list from this
> >> morning's PicList:
> >>
> > ...
> >> http://flyingpic24.com/3.html
> > You may like to pick up the book that is behind this website, as it is a complete introduction to programming the PIC24. It is available through Microchip, and I found it a good starting point for learning the C30 compiler.
> >
> > It uses the Explorer16 as its hardware base, but as you are just looking to play around with things then the programs should be readily adaptable to any hardware you build. The website has various updates and corrections along with program updates fo-
r later chips which are slightly different to the PIC24FJ256GA110 PIM that it initially was programmed for.
> >

Presumably
Programming 16-Bit PIC Microcontrollers in C: Learning to Fly the PIC 24
By Lucio Di Jasio

It's reviews on Amazon.co.uk are mixed.

Brian Gregory.
briangspamspam_OUTcix.compulink.co.uk

2011\08\09@210448 by V G

picon face
On Wed, Aug 3, 2011 at 2:02 PM, Matt Bennett <@spam@mattpiclistKILLspamspamhazmat.com> wrote:

> The dsPIC33FJ128GP802 is available in 28pin DIP- it has a 100K sps dual
> channel DAC.
>

My dsPIC of choice! (Since I first started looking into dsPICs

2011\08\10@000524 by Oli Glaser

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On 09/08/2011 01:05, Xiaofan Chen wrote:
> Some old stuff but can still be interesting.
>
> dsPIC MP3 decoder:
> http://www.pic24.ru/doku.php/en/mp3_dspic/ref/intro
>
> dsPIC wav player
> www.uchobby.com/index.php/2008/07/21/dspic-wav-player/
> http://flyingpic24.com/3.html
>
> dsPIC/ARM/PIC32 audio player (MOD, FLAC, etc)
> http://www.k9spud.com/traxmod/

Thanks, this type of practical reference material is always good to have at hand.

2011\08\10@035218 by alan.b.pearce

face picon face
> > Could you be more specific about the title please?
> >     Lots to study now!
>
> Presumably
>
> Programming 16-Bit PIC Microcontrollers in C: Learning to Fly the PIC 24
> By Lucio Di Jasio
>
> It's reviews on Amazon.co.uk are mixed.
>
> Brian Gregory.
> KILLspambriangKILLspamspamcix.compulink.co.uk

That's the one. I found it to be a good introduction, but then I am not a programmer by training.



-- Scanned by iCritical.

2011\08\13@191930 by Brian Gregory

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In-Reply-To: <RemoveME68C48B7730F8B04F8230C4E33C4354DC168C3BTakeThisOuTspamEXCHMBX01.fed.cclrc.ac..uk>

> > > Could you be more specific about the title please?
> > >     Lots to study now!
> >
> > Presumably
> >
> > Programming 16-Bit PIC Microcontrollers in C: Learning to Fly the PIC 24
> > By Lucio Di Jasio
> >
> > It's reviews on Amazon.co.uk are mixed.
> >
> > Brian Gregory.
> > spamBeGonebriangspamBeGonespamcix.compulink.co.uk
>
> That's the one. I found it to be a good introduction, but then I am not a programmer by training.
>
I think one of the main criticisms somebody made was that it didn't cover the hardware enough.

Brian Gregory.
TakeThisOuTbriangEraseMEspamspam_OUTcix.compulink.co.uk

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