Concept block

Code usage

/* Include library */#include"fir.h"/* Filter objects */movingAverage_tfir_ftr;movingAverage_tfir_ftr_2;/* co-eff value calculated from Iowa Hills FIR Filters tool */floatlow_pass_coeff[]= {0.033037850144342927,0.115593443353483427,0.195352709288829529,0.244281564490212016,0.244281564490212016,0.195352709288829529,0.115593443353483427,0.033037850144342927};floathigh_pass_coeff[]= {0.020062112266054671,0.039940619065501934,0.053593365042411495,0.053416852363487331,0.031286041832566183,-0.023735038477653174,-0.142727313632826841,-0.612151054466002487,0.612151054466002487,0.142727313632826841,0.023735038477653174,-0.031286041832566183,-0.053416852363487331,-0.053593365042411495,-0.039940619065501934,-0.020062112266054671};voidmain(){/* Initialization of filters */fir_create(&fir_ftr,low_pass_coeff,8,1.176,100);/* filter size 8, sample time 100ms */fir_create(&fir_ftr_2,high_pass_coeff,16,1,150);/* filter size 16, sample time 150ms */while(1)   {signal=signal_source();/* signal source function may ADC, Capture count, sensor data*//* Filter process      *      * call this function maximum passible short time      */fir_filter(&fir_ftr,signal);fir_filter(&fir_ftr_2,signal);process_or_print=fir_ftr.filtered;process_or_print=fir_ftr_2.filtered;   }}

Filter images

32 Tab filter 500Hz

32 Tab filter 100Hz

16 Tab filter 500Hz

Signed values

Refer other filters