1 files changed, 95 insertions, 0 deletions
diff --git a/Middlewares/ST/STM32_Audio/Addons/PDM/Inc/pdm2pcm_glo.h b/Middlewares/ST/STM32_Audio/Addons/PDM/Inc/pdm2pcm_glo.h
new file mode 100644
index 000000000..bf12727d3
--- /dev/null
+++ b/Middlewares/ST/STM32_Audio/Addons/PDM/Inc/pdm2pcm_glo.h
@@ -0,0 +1,95 @@
+/**
+  ******************************************************************************
+  * @file    pdm2pcm_glo.h
+  * @author  MCD Application Team
+  * @brief   Global header for PDM2PCM conversion code
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2011 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 __PDM2PCM_FILTER_H
+#define __PDM2PCM_FILTER_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include <stdint.h>
+
+/* Exported constants --------------------------------------------------------*/
+#define PDM_FILTER_ENDIANNESS_LE     ((uint16_t)0x0000)
+#define PDM_FILTER_ENDIANNESS_BE     ((uint16_t)0x0001)
+
+#define PDM_FILTER_BIT_ORDER_LSB     ((uint16_t)0x0000)
+#define PDM_FILTER_BIT_ORDER_MSB     ((uint16_t)0x0001)
+
+#define PDM_FILTER_DEC_FACTOR_48     ((uint16_t)0x0001)
+#define PDM_FILTER_DEC_FACTOR_64     ((uint16_t)0x0002)
+#define PDM_FILTER_DEC_FACTOR_80     ((uint16_t)0x0003)
+#define PDM_FILTER_DEC_FACTOR_128    ((uint16_t)0x0004)
+#define PDM_FILTER_DEC_FACTOR_16     ((uint16_t)0x0005)
+#define PDM_FILTER_DEC_FACTOR_24     ((uint16_t)0x0006)
+#define PDM_FILTER_DEC_FACTOR_32     ((uint16_t)0x0007)
+
+#define PDM_FILTER_INIT_ERROR           ((uint16_t)0x0010)
+#define PDM_FILTER_CONFIG_ERROR         ((uint16_t)0x0020)
+#define PDM_FILTER_ENDIANNESS_ERROR     ((uint16_t)0x0001)
+#define PDM_FILTER_BIT_ORDER_ERROR      ((uint16_t)0x0002)
+#define PDM_FILTER_CRC_LOCK_ERROR       ((uint16_t)0x0004)
+#define PDM_FILTER_DECIMATION_ERROR     ((uint16_t)0x0008)
+#define PDM_FILTER_GAIN_ERROR           ((uint16_t)0x0040)
+#define PDM_FILTER_SAMPLES_NUMBER_ERROR ((uint16_t)0x0080)
+#define PDM2PCM_INTERNAL_MEMORY_SIZE 16
+
+/* Exported types ------------------------------------------------------------*/
+typedef struct{
+  uint16_t bit_order;
+  uint16_t endianness;
+  uint32_t high_pass_tap;
+  uint16_t in_ptr_channels;
+  uint16_t out_ptr_channels;
+  uint32_t pInternalMemory[PDM2PCM_INTERNAL_MEMORY_SIZE];
+}PDM_Filter_Handler_t;
+
+typedef struct{
+  uint16_t decimation_factor;
+  uint16_t output_samples_number;
+  int16_t  mic_gain;
+}PDM_Filter_Config_t;
+
+/* Exported macros -----------------------------------------------------------*/
+
+/* Exported functions ------------------------------------------------------- */
+uint32_t PDM_Filter_Init(PDM_Filter_Handler_t *pHandler);
+uint32_t PDM_Filter_setConfig(PDM_Filter_Handler_t *pHandler, PDM_Filter_Config_t *pConfig); 
+uint32_t PDM_Filter_getConfig(PDM_Filter_Handler_t *pHandler, PDM_Filter_Config_t *pConfig);
+uint32_t PDM_Filter_deInterleave(void *pDataIn, void *pDataOut, PDM_Filter_Handler_t * pHandler);
+uint32_t PDM_Filter(void *pDataIn, void *pDataOut, PDM_Filter_Handler_t *pHandler);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PDM2PCM_FILTER_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+