RSS
Sort by » date activity ▼ answers views votes

11 questions

Tagged
  • x
108
views
no
votes
no
answers
Last activity 2017-10-06 13:02:39 +0200 by Martin Børs-Lind flag of Norway

HOW TO ANALYSIS PDM DATA CONTINUOUSLY IN NRF52832

For my audio application, I need to convert pcm out from pdm module(nrf52832) to an audio format (mp3,wav) continuously. Is there any method or procedure for this??...or any sample example?? please help... Actually, MIC is outing pdm ... (more)

39
views
no
votes
no
answers
Last activity 2017-10-02 13:01:30 +0200 by StefanNoll

Intersection of PDM Module with TWI Module

Dear Nordic team,

I have a running NRF52 with a firmware based on the freeRTOS demo. To this demo I added the PDM Support Module and the TWI Module. As soon as both sensors are available, I get very random ... (more)

94
views
1
vote
1
answer
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)

443
views
3
votes
2
answers
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

48
views
no
votes
1
answer
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?

976
views
1
vote
1
answer
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)

229
views
no
votes
1
answer
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)

485
views
1
vote
1
answer
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)

472
views
1
vote
1
answer
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!!

1k
views
no
votes
1
answer
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.

6k
views
no
votes
1
answer
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)

Statistics

  • Total users: 24904
  • Latest user: Kristal Fielder
  • Resolved questions: 10659
  • Unanswered questions: 3430
  • Total questions: 26081

User menu

    or sign up

Recent questions