TLV320AIC3254EVM-K: I try to use a microphone as an input and it is not recognised

Saussaye Matthieu

Hi,

Im using the TLV320AIC3254EVM-K to develop with GDE tool & AIC3254 a solution to filter my voice in the case of robust noise.

But the AIC3254 does not works with my card, I have a "blank" screen (as shown on the photograph) so I can't chose parameters for my microphone. But when i plug my development card, it is recognised by the AIC3254 system and the led becomes green.

The output to hear signal works but not the input. I tried to re-install everything by following the notice and to change the place of my jumper following the notice too, but nothing works.

Please accept my sincere thanks for you attention to my request, as well as my best regards.

Matthieu

over 3 years ago

0 Collin Wells over 3 years ago

TI__Guru 62085 points

Hello,

Not sure what you mean by plugging in the development card, can you elaborate? Note that on Win10 machines you may need to run the AIC3254 CS GUI in "Administrator" mode of you'll get the screen you've sent an image of where nothing shows up.

0 Saussaye Matthieu over 3 years ago in reply to Collin Wells

Prodigy 80 points

Thanks !

That's fine, it works as well as an administrator.

Do you have any recommandations of GDE system which would be efficient to filter robust noise (from industry / BTP) in a way to recover the voice ?

Matthieu

0 Saussaye Matthieu over 3 years ago in reply to Saussaye Matthieu

Prodigy 80 points

I have an other question.

Now the AIC3254 works as well but I dont understand how can I configure the input in a way to use my microphone as an input. I tried to change some parameters in AIC3254 (Audio Input) but nothing works..

Any advices would be interesting.

Best regards,

Matthieu

0 Diljith over 3 years ago in reply to Saussaye Matthieu

TI__Expert 6440 points

Hi,

Are you using the onboard mic or are you using an external mic? If you are using external mic to which connector have you connected the mic?

The EVM users guide covers most of the regular use cases and can be accessed here : https://www.ti.com/lit/pdf/SLAU264A\

Best Regards.

0 Saussaye Matthieu over 3 years ago in reply to Diljith

Prodigy 80 points

Hi,

I am using an external mic connected to J5. This way i run the AIC354 and set 10k to IN3_L

And nothing works...

I hope we will find a solution

Best Regards,

0 Diljith over 3 years ago in reply to Saussaye Matthieu

TI__Expert 6440 points

Hi Matthieu,

I have attached two documents that describe how to route on-board microphone to ADC and Line/Headphone Output.

The EVM jumpers have to be changed to select the microphone inputs and then the inputs can be routed to the ADC or bypassed and played out on the Headphone or Line Outputs.

In the first case the microphone data is digitized by the ADC and streamed to the PC using the USB controller.

In the second case, the microphone data is gained up the PGA and the routed to the analog outputs (Line/HP) through the mixer amplifier.

miniDSP mode is not needed for either of these configurations.

Let me know if these modes are working properly. Once these work for you, I shall get you started with the miniDSP mode.

Best Regards.

Onboard Mic to Ana Out.pdf

Onboard Mic to Dig Ou.pdf

0 Saussaye Matthieu over 3 years ago in reply to Diljith

Prodigy 80 points

Hi,

Thanks a lot, it works.

What about the miniDSP mode ?

How can it be useful for me ?

Best regards,

Matthieu

0 Saussaye Matthieu over 3 years ago in reply to Saussaye Matthieu

Prodigy 80 points

Ok it works as well to hear my voice without filter, but i can't test the GDE filter for now.

Are you able to solve this ?

Matthieu

0 Diljith over 3 years ago in reply to Saussaye Matthieu

TI__Expert 6440 points

Hi Matthieu,

In the GDE too, the same device settings have to be applied. In the on-board mic. case the mic is connected to IN3.

Please refer to the following thread for modifying the device configuration of a PPS process flow.

The key registers to enable and route the on-board microphone are the following three Page 1 registers.

###############################################
# Recording Setup
###############################################
#
# Select Page 1
w 30 00 01
#
# Powerup MIC BIAS
w 30 33 40
#
# Route IN3L to LEFT_P with 10K input impedance
w 30 34 04
#
# Route IN3R to LEFT_M with 10K input impedance
w 30 36 04

###############################################

In the GDE Systems-Setting code this would correspond to the following three entries and the procedure for that is shown in the linked e2e thread -

reg[1][0x33] = 0x40

reg[1][0x34] = 0x04

reg[1][0x36] = 0x04

Let us know if you face any issues.

Best Regards.

Audio

Audio forum

TLV320AIC3254EVM-K: I try to use a microphone as an input and it is not recognised