diff --git a/src/Makefile b/src/Makefile
index 66bc89a27..0e2b77cd5 100755
--- a/src/Makefile
+++ b/src/Makefile
@@ -58,6 +58,7 @@ WINC1500_DIR=winc1500
BOOTLDR_DIR=bootloader
UVC_DIR=uvc
CUBEAI_DIR=stm32cubeai
+LIBPDM_DIR=libpdm
OMV_BOARD_CONFIG_DIR=$(TOP_DIR)/$(OMV_DIR)/boards/$(TARGET)/
MP_BOARD_CONFIG_DIR=$(TOP_DIR)/$(MICROPY_DIR)/ports/stm32/boards/$(TARGET)/
@@ -155,6 +156,7 @@ OMV_CFLAGS += -I$(TOP_DIR)/$(MLX_DIR)/include/
OMV_CFLAGS += -I$(TOP_DIR)/$(ST_DIR)/include/
OMV_CFLAGS += -I$(TOP_DIR)/$(TENSORFLOW_DIR)/$(CPU)/
OMV_CFLAGS += -I$(TOP_DIR)/$(WINC1500_DIR)/include/
+OMV_CFLAGS += -I$(TOP_DIR)/$(LIBPDM_DIR)/
UVC_CFLAGS = $(CFLAGS)
UVC_CFLAGS += -I$(OMV_BOARD_CONFIG_DIR)
@@ -184,6 +186,7 @@ UVC_LDFLAGS = -mcpu=$(CPU) -mabi=aapcs-linux -mthumb -mfpu=$(FPU) -mfloat-abi=ha
#------------- Libraries ----------------#
LIBS = -lgcc
+LIBS += $(TOP_DIR)/$(LIBPDM_DIR)/libPDMFilter_CM7_GCC_wc32.a
FIRM_OBJ += $(wildcard $(BUILD)/$(CMSIS_DIR)/src/dsp/CommonTables/*.o)
FIRM_OBJ += $(wildcard $(BUILD)/$(CMSIS_DIR)/src/dsp/FastMathFunctions/*.o)
FIRM_OBJ += $(wildcard $(BUILD)/$(CMSIS_DIR)/src/dsp/MatrixFunctions/*.o)
diff --git a/src/libpdm/libPDMFilter_CM7_GCC_wc32.a b/src/libpdm/libPDMFilter_CM7_GCC_wc32.a
new file mode 100644
index 000000000..b1117d0f3
Binary files /dev/null and b/src/libpdm/libPDMFilter_CM7_GCC_wc32.a differ
diff --git a/src/libpdm/pdm2pcm_glo.h b/src/libpdm/pdm2pcm_glo.h
new file mode 100644
index 000000000..5722cefb9
--- /dev/null
+++ b/src/libpdm/pdm2pcm_glo.h
@@ -0,0 +1,97 @@
+/**
+ ******************************************************************************
+ * @file pdm2pcm_glo.h
+ * @author MCD Application Team
+ * @version V3.0.0
+ * @date 28-February-2017
+ * @brief Global header for PDM2PCM conversion code
+ ******************************************************************************
+ * @attention
+ *
+ *
© COPYRIGHT 2011 STMicroelectronics
+ *
+ * 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
+
+/* 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****/
+