embedded-software/filter_8h_source.html

 #ifndef _FILTER_H_

 #define _FILTER_H_


 #include <stdint.h>

 #define FILTER_BUFFER_SIZE 10


 typedef struct {


 int16_t   offset ;

 uint32_t   scale;

 uint16_t   shift ;

 int16_t   min;

 int16_t   max ;

 void (*min_callback)(int16_t);

 void (*max_callback)(int16_t);

 int16_t (*filter)(int16_t *values, uint16_t index ,uint16_t size, int16_t Last_Value);

 uint16_t raw_values[FILTER_BUFFER_SIZE];

 uint16_t index;

 int16_t value;

 } filter_t;


 void Filter_Init(filter_t * f_ptr, int16_t  offset, float scale);


 void Filter_Update(int16_t raw_value, filter_t * f_ptr);


 int16_t Filter_Get(filter_t * f_ptr);


 void Filter_SetMin(filter_t * f_ptr, int16_t threshold, void(*callback)(int16_t));


 void Filter_SetMax(filter_t * f_ptr, int16_t threshold, void(*callback)(int16_t));


 int16_t MovingAvgFilter(int16_t *values, uint16_t index, uint16_t size, int16_t Last_Value);


 void Filter_SetFilter(filter_t * f_ptr, int16_t(*new_filter)(int16_t *values, uint16_t index, uint16_t size, int16_t last_value));


 #endif // _FILTER_H_

Filter_Update
void Filter_Update(int16_t raw_value, filter_t *f_ptr)
computes the new value after going through the transfer function and inputs it into filter buffer arr...
Definition: filter.c:52

filter_t::scale
uint32_t scale
Definition: filter.h:80

filter_t::min
int16_t min
Definition: filter.h:82

filter_t::index
uint16_t index
Definition: filter.h:88

Filter_SetFilter
void Filter_SetFilter(filter_t *f_ptr, int16_t(*new_filter)(int16_t *values, uint16_t index, uint16_t size, int16_t last_value))
Method that allows user to pass a function to a pointer a different type of filter (i...
Definition: filter.c:161

filter_t::max
int16_t max
Definition: filter.h:83

Filter_SetMax
void Filter_SetMax(filter_t *f_ptr, int16_t threshold, void(*callback)(int16_t))
Filter_SetMin will set the MAX value in the filter to the threshold specified. Calls the callback fun...
Definition: filter.c:122

Filter_Get
int16_t Filter_Get(filter_t *f_ptr)
Filter_Get will retrieve the current value from the filter instance.
Definition: filter.c:96

filter_t::value
int16_t value
Definition: filter.h:89

filter_t::shift
uint16_t shift
Definition: filter.h:81

MovingAvgFilter
int16_t MovingAvgFilter(int16_t *values, uint16_t index, uint16_t size, int16_t Last_Value)
Moving Average filter - Default filter that adds the previous X values and divides by number of value...
Definition: filter.c:137

Filter_SetMin
void Filter_SetMin(filter_t *f_ptr, int16_t threshold, void(*callback)(int16_t))
Filter_SetMin will set the MIN value in the filter to the threshold specified. Calls the callback fun...
Definition: filter.c:107

filter_t::offset
int16_t offset
Definition: filter.h:79

filter_t
Definition: filter.h:77

FILTER_BUFFER_SIZE
#define FILTER_BUFFER_SIZE
Definition: filter.h:75

Filter_Init
void Filter_Init(filter_t *f_ptr, int16_t offset, float scale)
Initializes all struct variables and calculates the shift based on scale input for linear transfer fu...
Definition: filter.c:13