ST
Library to handle the X-NUCLEO-CCA02M1 MEMS Microphones Expansion Board.
Dependencies: ST_I2S ST_FREQUENCY_DIVIDER USBDEVICE
Dependents: HelloWorld_CCA02M1 HelloWorld_CCA02M1_mbedOS HelloWorld_CCA02M1 Karaoke_CCA01M1_CCA02M1_mbedOS
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X_NUCLEO_CCA02M1
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ST Expansion SW Team
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MEMS Microphones Library¶
Library to handle the X-NUCLEO-CCA02M1 MEMS Microphones Expansion Board. A single board allows to record a standard 2-channel stereo signal as an array of PCM samples (16 bit/sample); in principle, it could make use of six additional MEMS microphones to realize a 8-channel audio system.
Microphones configuration
Currently the configurations supported are the following:
- Stereo@48KHz
- Stereo@44.1KHz (CD audio quality)
- Stereo@32KHz
- Stereo@16KHz
- Stereo@8KHz
- Mono@48KHz
- Mono@44.1KHz
- Mono@32KHz
- Mono@16KHz
- Mono@8KHz
Mono configurations need a Jumper connecting PB_5 and PB_13 on the Morpho connector to properly work.
Platform compatibility¶
- This board can be currently used with a Nucleo-F401RE board only and has been tested with the default configuration provided by the HelloWorld_CCA02M1 example.
- At the moment the library is compatible with mbedOS 5.x only, i.e. it cannot work with mbed 2 ("classic").
I2S Peripheral Usage
By default this board makes use of the I2S peripheral available on Nucleo boards.
Acquiring through the USB¶
In order to acquire the recorded PCM audio channel with an audio SW on a PC, please connect the expansion board to a USB port of the PC, and the Nucleo board to a USB power supply.