Zdenka Šibíková
/
FRDM_MMA8451Q
cv1
Samplefilter.h@1:1567f5a4e96f, 2017-10-30 (annotated)
- Committer:
- zdenka
- Date:
- Mon Oct 30 16:12:27 2017 +0000
- Revision:
- 1:1567f5a4e96f
accelerometer samplefilter
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
zdenka | 1:1567f5a4e96f | 1 | #ifndef SAMPLEFILTER_H_ |
zdenka | 1:1567f5a4e96f | 2 | #define SAMPLEFILTER_H_ |
zdenka | 1:1567f5a4e96f | 3 | |
zdenka | 1:1567f5a4e96f | 4 | /* |
zdenka | 1:1567f5a4e96f | 5 | |
zdenka | 1:1567f5a4e96f | 6 | FIR filter designed with |
zdenka | 1:1567f5a4e96f | 7 | http://t-filter.appspot.com |
zdenka | 1:1567f5a4e96f | 8 | |
zdenka | 1:1567f5a4e96f | 9 | sampling frequency: 800 Hz |
zdenka | 1:1567f5a4e96f | 10 | |
zdenka | 1:1567f5a4e96f | 11 | * 0 Hz - 50 Hz |
zdenka | 1:1567f5a4e96f | 12 | gain = 1 |
zdenka | 1:1567f5a4e96f | 13 | desired ripple = 5 dB |
zdenka | 1:1567f5a4e96f | 14 | actual ripple = 2.914975479357161 dB |
zdenka | 1:1567f5a4e96f | 15 | |
zdenka | 1:1567f5a4e96f | 16 | * 150 Hz - 400 Hz |
zdenka | 1:1567f5a4e96f | 17 | gain = 0 |
zdenka | 1:1567f5a4e96f | 18 | desired attenuation = -40 dB |
zdenka | 1:1567f5a4e96f | 19 | actual attenuation = -43.03832555525106 dB |
zdenka | 1:1567f5a4e96f | 20 | |
zdenka | 1:1567f5a4e96f | 21 | */ |
zdenka | 1:1567f5a4e96f | 22 | |
zdenka | 1:1567f5a4e96f | 23 | #define SAMPLEFILTER_TAP_NUM 11 |
zdenka | 1:1567f5a4e96f | 24 | |
zdenka | 1:1567f5a4e96f | 25 | typedef struct { |
zdenka | 1:1567f5a4e96f | 26 | double history[SAMPLEFILTER_TAP_NUM]; |
zdenka | 1:1567f5a4e96f | 27 | unsigned int last_index; |
zdenka | 1:1567f5a4e96f | 28 | } SampleFilter; |
zdenka | 1:1567f5a4e96f | 29 | |
zdenka | 1:1567f5a4e96f | 30 | void SampleFilter_init(SampleFilter* f); |
zdenka | 1:1567f5a4e96f | 31 | void SampleFilter_put(SampleFilter* f, double input); |
zdenka | 1:1567f5a4e96f | 32 | double SampleFilter_get(SampleFilter* f); |
zdenka | 1:1567f5a4e96f | 33 | |
zdenka | 1:1567f5a4e96f | 34 | #endif |