ST / X_NUCLEO_CCA02M1

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

Fork of X_NUCLEO_CCA02M1 by ST Expansion SW Team

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 the Nucleo F4 Family only, please see the ST_I2S library compatibility for further information.
  • The library is compatible both with mbed OS 5.x and mbed classic 2.x (to work with mbed classic, the main application has to import the "events" library, which is not included into the "mbed" library).


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.

Diff: BSP/divisor.h

Revision:
2:9f389fd8fb2e
Parent:
1:245f83276546
Child:
3:c5091e8deede
--- a/BSP/divisor.h	Fri Apr 21 10:31:01 2017 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,75 +0,0 @@
-/**
- ******************************************************************************
- * @file    divisor.h
- * @author  AST / Software Platforms and Cloud
- * @version V1.0
- * @date    November 8th, 2016
- * @brief   Utilities header file for the X_NUCLEO_CCA02M1 expansion board.
- ******************************************************************************
- * @attention
- *
- * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *   1. Redistributions of source code must retain the above copyright notice,
- *      this list of conditions and the following disclaimer.
- *   2. Redistributions in binary form must reproduce the above copyright notice,
- *      this list of conditions and the following disclaimer in the documentation
- *      and/or other materials provided with the distribution.
- *   3. Neither the name of STMicroelectronics nor the names of its contributors
- *      may be used to endorse or promote products derived from this software
- *      without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- */
-
-
-/* Define to prevent recursive inclusion -------------------------------------*/
-
-#ifndef __DIVISOR_H
-#define __DIVISOR_H
-
-/* Includes ------------------------------------------------------------------*/
-
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif 
-
-/* Definitions ---------------------------------------------------------------*/
-
-#define AUDIO_IN_TIMER                                     TIM3
-#define AUDIO_IN_TIMER_CLK_ENABLE()                        __TIM3_CLK_ENABLE()  
-#define AUDIO_IN_TIMER_CHOUT_AF                            GPIO_AF2_TIM3
-#define AUDIO_IN_TIMER_CHOUT_PIN                           GPIO_PIN_5
-#define AUDIO_IN_TIMER_CHOUT_GPIO_PORT                     GPIOB
-#define AUDIO_IN_TIMER_CHOUT_GPIO_PORT_CLK_ENABLE()        __GPIOB_CLK_ENABLE()  
-#define AUDIO_IN_TIMER_CHIN_AF                             GPIO_AF2_TIM3
-#define AUDIO_IN_TIMER_CHIN_PIN                            GPIO_PIN_4
-#define AUDIO_IN_TIMER_CHIN_GPIO_PORT                      GPIOB
-#define AUDIO_IN_TIMER_CHIN_GPIO_PORT_CLK_ENABLE()         __GPIOB_CLK_ENABLE()   
-
-
-/* Functions -----------------------------------------------------------------*/
-
-uint8_t AUDIO_IN_Timer_Init(void);
-uint8_t AUDIO_IN_Timer_Start(void);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif