Zephyr API Documentation 4.3.0-rc1
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Device Drivers » Sensor » Device-specific Sensor API extensions » BMP581

Valid values for temperature and pressure IIR filter coefficient. More...

Macros

#define BMP581_DT_IIR_FILTER_BYPASS   0x00
 Bypass.
#define BMP581_DT_IIR_FILTER_COEFF_1   0x01
 1
#define BMP581_DT_IIR_FILTER_COEFF_3   0x02
 3
#define BMP581_DT_IIR_FILTER_COEFF_7   0x03
 7
#define BMP581_DT_IIR_FILTER_COEFF_15   0x04
 15
#define BMP581_DT_IIR_FILTER_COEFF_31   0x05
 31
#define BMP581_DT_IIR_FILTER_COEFF_63   0x06
 63
#define BMP581_DT_IIR_FILTER_COEFF_127   0x07
 127

Detailed Description

Valid values for temperature and pressure IIR filter coefficient.

\[ data_n = \frac{data_{n-1} \times filtercoefficient + data_{in}}{filtercoefficient + 1} \]

where:

  • $ data_n $ is the current filtered output
  • $ data_{n-1} $ is the previous filtered output
  • $ data_{in} $ is the current input sample
  • $ filtercoefficient $ is one of the coefficient values below

Higher coefficient values provide more filtering (smoother output) but increase response time.

Macro Definition Documentation

◆ BMP581_DT_IIR_FILTER_BYPASS

#define BMP581_DT_IIR_FILTER_BYPASS   0x00

#include <zephyr/dt-bindings/sensor/bmp581.h>

Bypass.

◆ BMP581_DT_IIR_FILTER_COEFF_1

#define BMP581_DT_IIR_FILTER_COEFF_1   0x01

#include <zephyr/dt-bindings/sensor/bmp581.h>

1

◆ BMP581_DT_IIR_FILTER_COEFF_127

#define BMP581_DT_IIR_FILTER_COEFF_127   0x07

#include <zephyr/dt-bindings/sensor/bmp581.h>

127

◆ BMP581_DT_IIR_FILTER_COEFF_15

#define BMP581_DT_IIR_FILTER_COEFF_15   0x04

#include <zephyr/dt-bindings/sensor/bmp581.h>

15

◆ BMP581_DT_IIR_FILTER_COEFF_3

#define BMP581_DT_IIR_FILTER_COEFF_3   0x02

#include <zephyr/dt-bindings/sensor/bmp581.h>

3

◆ BMP581_DT_IIR_FILTER_COEFF_31

#define BMP581_DT_IIR_FILTER_COEFF_31   0x05

#include <zephyr/dt-bindings/sensor/bmp581.h>

31

◆ BMP581_DT_IIR_FILTER_COEFF_63

#define BMP581_DT_IIR_FILTER_COEFF_63   0x06

#include <zephyr/dt-bindings/sensor/bmp581.h>

63

◆ BMP581_DT_IIR_FILTER_COEFF_7

#define BMP581_DT_IIR_FILTER_COEFF_7   0x03

#include <zephyr/dt-bindings/sensor/bmp581.h>

7