Use AVR microcontroller IIR low-pass filter, which cut-off frequency, sampling frequency with specifications, running environment is to use IICAVR build project, then the code can join in

滤波\sun.c
....\SUN.cof
....\SUN.dbg
....\SUN.hex
....\sun.lis
....\SUN.lk
....\SUN.lst
....\SUN.mak
....\SUN.mp
....\sun.o
....\sun.prj
....\SUN.SRC
....\BACKUP\sun.c.110113212920
....\......\sun.c.110113215844
....\......\sun.c.110113220022
....\......\sun.c.110113220330
....\......\sun.c.110113221700
....\......\sun.c.110113224256
....\......\sun.c.110113224800
....\......\sun.c.110113224848
....\......\sun.c.110113224924
....\......\sun.c.110113224934
....\......\sun.c.110113224944
....\......\sun.c.110113225040
....\......\sun.c.110113225232
....\......\sun.c.110113225346
....\......\sun.c.110113225450
....\......\sun.c.110113225530
....\......\sun.c.110113225630
....\......\sun.c.110114100434
....\......\sun.c.110114100734
....\......\sun.c.110114100812
....\......\sun.c.110114101700
....\......\sun.c.110114101726
....\......\sun.c.110114101808
....\......\sun.c.110114101834
....\......\sun.c.110114102204
....\......\sun.c.110114102238
....\......\sun.c.110114102314
....\......\sun.c.110114102346
....\......\sun.c.110114102412
....\......\sun.c.110114102448
....\......\sun.c.110114102518
....\......\sun.c.110114102542
....\......\sun.c.110114102650
....\......\sun.c.110114103206
....\......\sun.c.110114103344
....\......\sun.c.110114103418
....\......\sun.c.110114103512
....\......\sun.c.110114103604
....\......\sun.c.110114104634
....\......\sun.c.110114104648
....\......\sun.c.110114104830
....\......\sun.c.110114104934
....\......\sun.c.110114104954
....\......\sun.c.110114105036
....\......\sun._c
....\BACKUP
滤波

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