Senior Design: Sound Monitor / AudioDemo

Audio Demo with DISCO Board, takes control samples, waits for user input, samples regularly.

Dependencies:   CMSIS_DSP_401 STM32L4xx_HAL_Driver mbed-src_DISO_AUDIO_DEMO

pdm_filter.h@0:3eee9435dd17, 2015-12-13 (annotated)

Committer:
EricLew
Date:
Sun Dec 13 19:12:11 2015 +0000
Revision:
0:3eee9435dd17
Audio Demo using DISCO Board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
EricLew 0:3eee9435dd17 1 /**
EricLew 0:3eee9435dd17 2 ******************************************************************************
EricLew 0:3eee9435dd17 3 * @file pdm_filter.h
EricLew 0:3eee9435dd17 4 * @author MCD Application Team
EricLew 0:3eee9435dd17 5 * @version V2.0.1
EricLew 0:3eee9435dd17 6 * @date 17-December-2013
EricLew 0:3eee9435dd17 7 * @brief Header file for PDM audio software decoding Library.
EricLew 0:3eee9435dd17 8 * This Library is used to decode and reconstruct the audio signal
EricLew 0:3eee9435dd17 9 * produced by ST MEMS microphone (MP45Dxxx, MP34Dxxx).
EricLew 0:3eee9435dd17 10 * For more details about this Library, please refer to document
EricLew 0:3eee9435dd17 11 * "PDM audio software decoding on STM32 microcontrollers (AN3998)".
EricLew 0:3eee9435dd17 12 ******************************************************************************
EricLew 0:3eee9435dd17 13 * @attention
EricLew 0:3eee9435dd17 14 *
EricLew 0:3eee9435dd17 15 * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
EricLew 0:3eee9435dd17 16 *
EricLew 0:3eee9435dd17 17 * Licensed under MCD-ST Image SW License Agreement V2, (the "License");
EricLew 0:3eee9435dd17 18 * You may not use this file except in compliance with the License.
EricLew 0:3eee9435dd17 19 * You may obtain a copy of the License at:
EricLew 0:3eee9435dd17 20 *
EricLew 0:3eee9435dd17 21 * http://www.st.com/software_license_agreement_image_v2
EricLew 0:3eee9435dd17 22 *
EricLew 0:3eee9435dd17 23 * Unless required by applicable law or agreed to in writing, software
EricLew 0:3eee9435dd17 24 * distributed under the License is distributed on an "AS IS" BASIS,
EricLew 0:3eee9435dd17 25 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
EricLew 0:3eee9435dd17 26 * See the License for the specific language governing permissions and
EricLew 0:3eee9435dd17 27 * limitations under the License.
EricLew 0:3eee9435dd17 28 *
EricLew 0:3eee9435dd17 29 ******************************************************************************
EricLew 0:3eee9435dd17 30 */
EricLew 0:3eee9435dd17 31
EricLew 0:3eee9435dd17 32 /* Define to prevent recursive inclusion -------------------------------------*/
EricLew 0:3eee9435dd17 33 #ifndef __PDM_FILTER_H
EricLew 0:3eee9435dd17 34 #define __PDM_FILTER_H
EricLew 0:3eee9435dd17 35
EricLew 0:3eee9435dd17 36 #ifdef __cplusplus
EricLew 0:3eee9435dd17 37 extern "C" {
EricLew 0:3eee9435dd17 38 #endif
EricLew 0:3eee9435dd17 39
EricLew 0:3eee9435dd17 40 /* Includes ------------------------------------------------------------------*/
EricLew 0:3eee9435dd17 41 #include <stdint.h>
EricLew 0:3eee9435dd17 42
EricLew 0:3eee9435dd17 43
EricLew 0:3eee9435dd17 44 /* Exported types ------------------------------------------------------------*/
EricLew 0:3eee9435dd17 45 typedef struct {
EricLew 0:3eee9435dd17 46 uint16_t Fs;
EricLew 0:3eee9435dd17 47 float LP_HZ;
EricLew 0:3eee9435dd17 48 float HP_HZ;
EricLew 0:3eee9435dd17 49 uint16_t In_MicChannels;
EricLew 0:3eee9435dd17 50 uint16_t Out_MicChannels;
EricLew 0:3eee9435dd17 51 char InternalFilter[34];
EricLew 0:3eee9435dd17 52 } PDMFilter_InitStruct;
EricLew 0:3eee9435dd17 53
EricLew 0:3eee9435dd17 54 /* Exported constants --------------------------------------------------------*/
EricLew 0:3eee9435dd17 55 /* Exported macros -----------------------------------------------------------*/
EricLew 0:3eee9435dd17 56 #define HTONS(A) ((((uint16_t)(A) & 0xff00) >> 8) | \
EricLew 0:3eee9435dd17 57 (((uint16_t)(A) & 0x00ff) << 8))
EricLew 0:3eee9435dd17 58
EricLew 0:3eee9435dd17 59 /* Exported functions ------------------------------------------------------- */
EricLew 0:3eee9435dd17 60 void PDM_Filter_Init(PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 61
EricLew 0:3eee9435dd17 62 int32_t PDM_Filter_64_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 63 int32_t PDM_Filter_80_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 64 int32_t PDM_Filter_128_MSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 65 int32_t PDM_Filter_64_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 66 int32_t PDM_Filter_80_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 67 int32_t PDM_Filter_128_LSB(uint8_t* data, uint16_t* dataOut, uint16_t MicGain, PDMFilter_InitStruct * Filter);
EricLew 0:3eee9435dd17 68
EricLew 0:3eee9435dd17 69 #ifdef __cplusplus
EricLew 0:3eee9435dd17 70 }
EricLew 0:3eee9435dd17 71 #endif
EricLew 0:3eee9435dd17 72
EricLew 0:3eee9435dd17 73 #endif /* __PDM_FILTER_H */
EricLew 0:3eee9435dd17 74
EricLew 0:3eee9435dd17 75 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
EricLew 0:3eee9435dd17 76
EricLew 0:3eee9435dd17 77