RE: Adding SPL option to Nordic Thingy:52

tushar19 — Thu, 16 Aug 2018 12:44:59 GMT

Hi..Did you got the desired results???

RE: Adding SPL option to Nordic Thingy:52

Dimitar — Thu, 06 Jul 2017 11:08:04 GMT

Sounds great, let's see :) Thanks Björn!

RE: Adding SPL option to Nordic Thingy:52

bjorn-spockeli — Thu, 06 Jul 2017 10:47:19 GMT

Hi Dimitar,

if Davide Gironi is able to implement this on an Atmega328, then you should have no issues implementing this on the Cortex-M4F of the nRF52832 used by the Nordic Thingy:52.

We have an FFT example in the SDK, see this Infocenter page, that uses the FPU peripheral with the CMSIS DSP library. The example generates sine data (with noise and without) for calculations and processes sine data with FFT every 1 second. You can use this example as a template.

As for the microphone, we're using the ST MP34DB02, which is a stereo MEMS microphone with pretty decent characteristics.

Best regards Bjørn