Posted on August 01, 2013 at 17:20 Hi Kandur, Clive,
Here you go , a premium gift for you. Waiting official release on our web site to support most of our STM32 Series. [ see attached :
libPDMFilter_CM4F_GCC.a
] and keep me posted if it helps
Cheers,
STOne-
p
dm_filter.h :
/* 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) ((((u16)(A) & 0xff00) >>
😎 | \
(((u16)(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_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);
#ifdef __cplusplus
}
#endif
#endif /* __PDM_FILTER_H */
________________
Attachments : libPDMFilter_CM4F_GCC.a :
https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I125&d=%2Fa%2F0X0000000bhB%2F._kCPS7XrJmibbbGR9gmvCfJe7Tu2bUtGBZ4whsGhb0&asPdf=false
