X-NUCLEO-IKS02A1 Audio

Arduino library to support the IMP34DT05 digital microphone. Currently, this library works only with the X-NUCLEO-IKS02A1 and a NUCLEO-F401RE or a NUCLEO-L476RG. It requires a STM32 Core equal to or greater than version 2.0.0.

API

This library acquires PDM, converts PDM to PCM.

PDM

Before acquire PDM it is required to initialize it:

PDM.begin();

Thanks to PDM instance, it is possible to start to acquire the data, stop, pause the acquisition and resume.

• Start to acquire the PDM data:

PDM.Record(buffer);

• Stop to acquire the PDM data:

PDM.Stop();

• Pause the acquisition:

PDM.Pause();

• Resume the acquisition.

PDM.Resume();

• To perform a function to process the data (foo in the example), it can call the function below:

PDM.onReceive(foo);

PDM2PCM

Before encoding the data from PDM to PCM, it must be initialized following the procedure below:

pdm2pcm_init();

Set the volume of the microphone.

    pdm2pcm_volume(volume);
    
    pdm2pcm(BufIn, BufOut, BLOCK_SIZE);

Documentation

You can find the source files at https://github.com/stm32duino/X-NUCLEO-IKS02A1-Audio

The X-NUCLEO-IKS02A1 datasheet is available at https://www.st.com/content/st_com/en/products/mems-and-sensors/mems-microphones/imp34dt05.html