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95 lines
3.7 KiB
95 lines
3.7 KiB
/** |
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****************************************************************************** |
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* @file pdm2pcm_glo.h |
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* @author MCD Application Team |
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* @brief Global header for PDM2PCM conversion code |
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****************************************************************************** |
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* @attention |
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* |
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* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> |
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* |
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* Licensed under MCD-ST Image SW License Agreement V2, (the "License"); |
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* You may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at: |
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* |
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* http://www.st.com/software_license_agreement_image_v2 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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* |
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****************************************************************************** |
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*/ |
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/* Define to prevent recursive inclusion -------------------------------------*/ |
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#ifndef __PDM2PCM_FILTER_H |
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#define __PDM2PCM_FILTER_H |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* Includes ------------------------------------------------------------------*/ |
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#include <stdint.h> |
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/* Exported constants --------------------------------------------------------*/ |
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#define PDM_FILTER_ENDIANNESS_LE ((uint16_t)0x0000) |
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#define PDM_FILTER_ENDIANNESS_BE ((uint16_t)0x0001) |
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#define PDM_FILTER_BIT_ORDER_LSB ((uint16_t)0x0000) |
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#define PDM_FILTER_BIT_ORDER_MSB ((uint16_t)0x0001) |
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#define PDM_FILTER_DEC_FACTOR_48 ((uint16_t)0x0001) |
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#define PDM_FILTER_DEC_FACTOR_64 ((uint16_t)0x0002) |
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#define PDM_FILTER_DEC_FACTOR_80 ((uint16_t)0x0003) |
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#define PDM_FILTER_DEC_FACTOR_128 ((uint16_t)0x0004) |
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#define PDM_FILTER_DEC_FACTOR_16 ((uint16_t)0x0005) |
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#define PDM_FILTER_DEC_FACTOR_24 ((uint16_t)0x0006) |
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#define PDM_FILTER_DEC_FACTOR_32 ((uint16_t)0x0007) |
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#define PDM_FILTER_INIT_ERROR ((uint16_t)0x0010) |
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#define PDM_FILTER_CONFIG_ERROR ((uint16_t)0x0020) |
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#define PDM_FILTER_ENDIANNESS_ERROR ((uint16_t)0x0001) |
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#define PDM_FILTER_BIT_ORDER_ERROR ((uint16_t)0x0002) |
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#define PDM_FILTER_CRC_LOCK_ERROR ((uint16_t)0x0004) |
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#define PDM_FILTER_DECIMATION_ERROR ((uint16_t)0x0008) |
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#define PDM_FILTER_GAIN_ERROR ((uint16_t)0x0040) |
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#define PDM_FILTER_SAMPLES_NUMBER_ERROR ((uint16_t)0x0080) |
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#define PDM2PCM_INTERNAL_MEMORY_SIZE 16 |
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/* Exported types ------------------------------------------------------------*/ |
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typedef struct{ |
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uint16_t bit_order; |
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uint16_t endianness; |
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uint32_t high_pass_tap; |
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uint16_t in_ptr_channels; |
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uint16_t out_ptr_channels; |
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uint32_t pInternalMemory[PDM2PCM_INTERNAL_MEMORY_SIZE]; |
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}PDM_Filter_Handler_t; |
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typedef struct{ |
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uint16_t decimation_factor; |
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uint16_t output_samples_number; |
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int16_t mic_gain; |
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}PDM_Filter_Config_t; |
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/* Exported macros -----------------------------------------------------------*/ |
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/* Exported functions ------------------------------------------------------- */ |
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uint32_t PDM_Filter_Init(PDM_Filter_Handler_t *pHandler); |
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uint32_t PDM_Filter_setConfig(PDM_Filter_Handler_t *pHandler, PDM_Filter_Config_t *pConfig); |
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uint32_t PDM_Filter_getConfig(PDM_Filter_Handler_t *pHandler, PDM_Filter_Config_t *pConfig); |
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uint32_t PDM_Filter_deInterleave(void *pDataIn, void *pDataOut, PDM_Filter_Handler_t * pHandler); |
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uint32_t PDM_Filter(void *pDataIn, void *pDataOut, PDM_Filter_Handler_t *pHandler); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* __PDM2PCM_FILTER_H */ |
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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