MEMS Microphones Library

Revision 6:9b8bc842aeb3, committed 2017-04-21

Comitter:

davide.aliprandi@st.com

Date:

Fri Apr 21 19:39:27 2017 +0200

Parent:

4:0e1435fe1634

Child:

7:9d6a4a53e640

Commit message:

Closed PDM2PCM library removed.

Changed in this revision

--- a/BSP/PDM2PCMAudio.h	Fri Apr 21 11:22:02 2017 +0200
+++ b/BSP/PDM2PCMAudio.h	Fri Apr 21 19:39:27 2017 +0200
@@ -42,16 +42,11 @@
 #define __PDM2PCM_AUDIO_CLASS_H
 
 
-/* Definitions ---------------------------------------------------------------*/
-
-#define USE_OPEN_PDM2PCM_LIBRARY
-#define PDM2PCM_AUDIO_DEBUG
-
-
 /* Includes ------------------------------------------------------------------*/
 
 #include "mbed.h"
 #include "component_def.h"
+#include "XNucleoCCA02M1_config.h"
 #ifdef USE_OPEN_PDM2PCM_LIBRARY
 #include "OpenPDMFilter.h"
 #else

--- a/BSP/XNucleoCCA02M1.cpp	Fri Apr 21 11:22:02 2017 +0200
+++ b/BSP/XNucleoCCA02M1.cpp	Fri Apr 21 19:39:27 2017 +0200
@@ -105,7 +105,7 @@
     _PDM_buffer_one_ms = (uint16_t *) calloc(_PDM_samples_one_ms, sizeof(uint16_t));
 
     /* Starting the I2S frequency divider, if needed. */
-    if (_channels != 1) {
+    if (_channels == 2) {
         FrequencyDivider *divider = new FrequencyDivider();
         divider->start();
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BSP/XNucleoCCA02M1_config.h	Fri Apr 21 19:39:27 2017 +0200
@@ -0,0 +1,78 @@
+/**
+ ******************************************************************************
+ * @file    XNucleoCCA02M1_config.h
+ * @author  AST / Software Platforms and Cloud
+ * @version V1.0
+ * @date    November 3rd, 2015
+ * @brief   Configuration 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.
+ *
+ ******************************************************************************
+ */
+
+
+/* Generated with STM32CubeTOO -----------------------------------------------*/
+
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+
+#ifndef __X_NUCLEO_CCA02M1_CONFIG_H
+#define __X_NUCLEO_CCA02M1_CONFIG_H
+
+
+/* Definitions ---------------------------------------------------------------*/
+
+/* ACTION --------------------------------------------------------------------*
+ * Specify here a configuration for I/O and interrupts' pins.                 *
+ *                                                                            *
+ * Example:                                                                   *
+ *   // I2C.                                                                  *
+ *   #define EXPANSIONBOARD_PIN_I2C_SCL  (D15)                                *
+ *   #define EXPANSIONBOARD_PIN_I2C_SDA  (D14)                                *
+ *                                                                            *
+ *   // SPI.                                                                  *
+ *   #define EXPANSIONBOARD_PIN_SPI_MOSI (D11)                                *
+ *   #define EXPANSIONBOARD_PIN_SPI_MISO (D12)                                *
+ *   #define EXPANSIONBOARD_PIN_SPI_SCLK (D13)                                *
+ *                                                                            *
+ *   // Interrupts.                                                           *
+ *   #define EXPANSIONBOARD_PIN_INT_1    (A2)                                 *
+ *----------------------------------------------------------------------------*/
+/**
+ * Enable to use the OpenPDM2PCM library, which can handle one microphone at
+ * 16KHz maximum.
+ */
+#define USE_OPEN_PDM2PCM_LIBRARY
+
+/**
+ * Enable to signal the duration of the PDM2PCM library utilization, which can
+ * be seen through an oscilloscope.
+ */
+//#define PDM2PCM_AUDIO_DEBUG
+
+#endif /* __X_NUCLEO_CCA02M1_CONFIG_H */

--- a/Middlewares/OpenPDM2PCM/OpenPDMFilter.c	Fri Apr 21 11:22:02 2017 +0200
+++ b/Middlewares/OpenPDM2PCM/OpenPDMFilter.c	Fri Apr 21 19:39:27 2017 +0200
@@ -64,31 +64,30 @@
               uint32_t Kernel[/* KernelLen */], unsigned short KernelLen,
               uint32_t Result[/* SignalLen + KernelLen - 1 */]);
 
-int64_t filterTable(uint8_t *data, uint8_t table, TPDMFilter_InitStruct *Param)
+inline int64_t filterTable(uint8_t *data, uint8_t table, TPDMFilter_InitStruct *Param)
 {
-  uint16_t contatore = 0;
+  uint16_t counter = 0;
   int64_t F = 0;
   uint8_t c;
   uint8_t i;
-  uint16_t internalBit = Param->bit[table];
-  uint16_t internalBit_copy = internalBit;
+  uint16_t internal_bit = Param->bit[table];
   uint16_t In_Mic = Param->In_MicChannels;
 
   c = data[0];
-  for(i=0; i<Param->Decimation;i++)
+  for (i=0; i<Param->Decimation; i++)
   {  
-    if (c & (1<<((7-internalBit))))
+    if (c & (1<<((7-internal_bit))))
       F += coef[table][i];  
-    internalBit++;  
-    if(internalBit==8)
+    internal_bit++;  
+    if (internal_bit==8)
     {
-      contatore+=In_Mic;
-      internalBit = 0;
-      c = data[contatore];
+      counter += In_Mic;
+      internal_bit = 0;
+      c = data[counter];
     }
   }
-  Param->bit[table] = internalBit;
-  Param->byte = contatore;
+  Param->bit[table] = internal_bit;
+  Param->byte = counter;
 
   return F;
 }

Binary file Middlewares/PDM2PCM/libPDMFilter_CM4_GCC.a has changed

--- a/Middlewares/PDM2PCM/pdm_filter.h	Fri Apr 21 11:22:02 2017 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,76 +0,0 @@
-/**
-  ******************************************************************************
-  * @file    pdm_filter.h
-  * @author  MCD Application Team
-  * @version V2.0.1
-  * @date    17-December-2013
-  * @brief   Header file for PDM audio software decoding Library.   
-  *          This Library is used to decode and reconstruct the audio signal
-  *          produced by ST MEMS microphone (MP45Dxxx, MP34Dxxx).
-  *          For more details about this Library, please refer to document
-  *          "PDM audio software decoding on STM32 microcontrollers (AN3998)".  
- ******************************************************************************
-  * @attention
-  *
-  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
-  *
-  * Licensed under MCD-ST Image SW License Agreement V2, (the "License");
-  * You may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at:
-  *
-  *        http://www.st.com/software_license_agreement_image_v2
-  *
-  * Unless required by applicable law or agreed to in writing, software 
-  * distributed under the License is distributed on an "AS IS" BASIS, 
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-  *
-  ******************************************************************************
-  */
-
-/* Define to prevent recursive inclusion -------------------------------------*/
-#ifndef __PDM_FILTER_H
-#define __PDM_FILTER_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-
-/* Includes ------------------------------------------------------------------*/
-#include <stdint.h>
-
-
-/* Exported types ------------------------------------------------------------*/
-typedef struct {
-  uint16_t Fs;
-  float LP_HZ;
-  float HP_HZ;
-  uint16_t In_MicChannels;
-  uint16_t Out_MicChannels;
-  char InternalFilter[34];
-} PDMFilter_InitStruct;
-
-/* Exported constants --------------------------------------------------------*/
-/* Exported macros -----------------------------------------------------------*/
-#define HTONS(A)  ((((uint16_t)(A) & 0xff00) >> 8) | \
-                   (((uint16_t)(A) & 0x00ff) << 8))
-
-/* Exported functions ------------------------------------------------------- */
-void PDM_Filter_Init(PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_64_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_80_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_128_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_64_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_80_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-int32_t PDM_Filter_128_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __PDM_FILTER_H */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
-

Binary file Middlewares/PDM2PCM/software_license_agreement_image_v2.pdf has changed