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Last activity 2017-06-20 15:09:14 +0200 by Sigurd flag of Norway

PDM Sample Buffer

Hi,

I found your PDM Working Example. However I wonder what to make of the data I get.

What is the CONFIG_PDM_BUFFER_SIZE_SAMPLES for? Do I get 16Bit Bit-Schemes from which I must assemble my PCM Data or are there lets ... (more)

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3
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2
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Last activity 2017-06-02 19:28:06 +0200 by brian

PDM working example

hi, Is there any working PDM example for nRF52832? or can anyone give a sample initialization code for PDM with easyDMA using the inbuilt nrf_pdm_drv functions?

Regardss, Vishnu

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Last activity 2017-06-01 15:39:37 +0200 by Kristin flag of Norway

pdm clock can't gernerate,

i use nrf52_DK to debug PDM with a digital MIC, and select the P0.09 for the PDM clk, but i have not see any clock signal output, is it right? and i also haven't see the convet date, what's wrong?

893
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1
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Last activity 2017-02-17 12:50:54 +0200 by Ole Bauck flag of Norway

PDM microphone (02730A0019 or AKU242) electrical connection to nRF52832

Hi,

I am connecting the AKU242 straight to our microprocessor. It is a PDM interface so it has a SELECT, DATA, CLOCK, VDD and 5 GND signals. On the datasheet, there are two identical PDM microphones with one SELECT connected ... (more)

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Last activity 2017-02-01 16:31:59 +0200 by Ole Bauck flag of Norway

nRF52840 I2S consumption

What is the most energy efficient microphone input method, PCM via I2S or PDM. Does the SoC have a special HW handling of the PDM format for converting to PCM? Does the filtering of the 1 bit conversion compete with ... (more)

337
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1
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1
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Last activity 2017-01-26 13:06:20 +0200 by Sigurd flag of Norway

nrf52 microphone : SAADC, PDM or I2S ?

I'm starting a new design on nRF52 and I need to connect a microphone on it. Reading the datasheets and questions here, I found there's 3 solutions for the type of microphone and interface to nRF52 :

  • Analog microphone ...
(more)

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1
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Last activity 2016-04-06 10:40:25 +0200 by Hung Bui

Where is the PDM mic example on nRF51??

Dear All.

As I know, nRF52 support PDM mic. So, I'll make recording sound with nRF52. But, I do not find PDM example on SDK 11.

Please notice me, where is the PDM mic example.

Thank you!!

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Last activity 2015-12-14 14:10:53 +0200 by Anders Strand flag of Norway

Does nrf52832 SDK contains any examples for audio application?

I would like to know how can I use nrf52832 preview kit for audio application, i.e. I would like to use PDM interface of nrf52832, please guide me on how can i do that.

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Last activity 2015-06-23 01:44:49 +0200 by RK flag of Singapore

NRF52 Errata and other Questions (I2S)

Hello,

yesterday i ordered th nrf52 Development Kit an just had a look in the Errata http://infocenter.nordicsemi.com/inde... So if i get my Development Board, will all this stuff marked up in Errata not working to me ... (more)

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