Hi David,
I am really grateful for your prompt response. These comments will be very
helpful for the beginners like me.
Actually I am assigned a project to design a digital communication system
to transmit digital voice over Zigbee.
I have to implement Codec 2.0, Modem and some encryption on STM32F4 board.
So that my STM board can act as a hand held unit (Takes Audio from built in
Mic, Encodes, Modulate and then after encryption, gives serial data to
Zigbee device for transmission. It should do the reverse upon serial data
reception and produce audio on Speakers of STM board.
SM1000 is indeed a great achievement and surely serve my purpose. I was
curious regarding using STM32F407 discovery board as a Standalone Unit in
my application.Can we not use the built in Mic and Speaker Jack of
STM32F407VG board for audio input and output? Can STM32F407VG board work
alone as a Standalone Device?
Do highlight its possibilities. Once again thank you for your time and
efforts.
Looking forward for your kind response.
Best Regards
-Sidrah
On Tue, Apr 21, 2015 at 3:23 AM, David Rowe <[email protected]> wrote:
> Hello Sidrah,
>
> I've added some comments to the adc_rec and dac_play source to indicate
> which STM32F4 pins the signals connect to.
>
> They don't connect to the Discovery board microphone or PCM codec. I
> imagine there are examples available from STM for using these devices.
>
> the profile programs are for profiling (measuring the execution speed),
> they don't do any I/O. sm1000_main.c is the closest to what you want.
>
> What is your application?
>
> - David
>
> On 20/04/15 20:33, Sidrah Javed wrote:
> > Hi Everyone,
> >
> > I have been trying to record audio from built-in STM32F4 Mic using
> > adc_rec.elf and similarly to play audio (.raw file) to STM32F4 Speaker
> > Jack using dac_play.elf. But unfortunately none of these is working for
> me.
> >
> > Firstly, adc_rec.elf does generate an adc.raw file but it does not
> > contain any speech upon listening through play command. Can any1 help me
> > in resolving this issue? Is this modulated speech? Or it does not take
> > audio input from Mic rather from any PIN? If so then which PINs of STM
> > board?
> >
> > Secondly, dac_play.elf does not play stm_in.raw on the speaker jack of
> > STM32F4 board. Is it also producing output on some other PINs of STM
> board?
> >
> > I have also been working on freedv_tx_profile and freedv_rx_profile. I
> > also want to know where (At which pins) it gives coded and modulated
> > transmission output? and from where does it receive reception Input?
> >
> > I am new in this and could not understand much from the C codes. I will
> > highly appreciate any help from this forum.
> >
> > Looking forward for the kind response.
> > Best Regards
> > -Sidrah
> >
> >
> >
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Develop your own process in accordance with the BPMN 2 standard
Learn Process modeling best practices with Bonita BPM through live exercises
http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
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