airspeed_ms45xx_i2c.h File Reference

Airspeed driver for the MS45xx pressure sensor via I2C. More...

#include "std.h"

Include dependency graph for airspeed_ms45xx_i2c.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	AirspeedMs45xx

Functions
void	airspeed_ms45xx_i2c_change_tau (float new_tau)
void	ms45xx_i2c_init (void)
void	ms45xx_i2c_periodic (void)
void	ms45xx_i2c_event (void)

Variables
struct AirspeedMs45xx	ms45xx

Detailed Description

Airspeed driver for the MS45xx pressure sensor via I2C.

Definition in file airspeed_ms45xx_i2c.h.

---

Data Structure Documentation

AirspeedMs45xx

struct AirspeedMs45xx

Definition at line 31 of file airspeed_ms45xx_i2c.h.

Data Fields
float	airspeed	Airspeed in m/s estimated from (differential) pressure.
bool	autoset_offset	Set offset value from current filtered value.
float	lowpass_tau	Time constant for low pass filter.
bool	offset_set	Offset is set once.
float	pressure	(differential) pressure in Pascal
float	pressure_offset	Offset in Pascal.
float	pressure_scale	Scaling factor from raw measurement to Pascal.
bool	pressure_type	Pressure type Differential of Gauge.
uint16_t	raw_p	Raw pressure.
int16_t	temperature	Temperature in 0.1 deg Celcius.

Function Documentation

airspeed_ms45xx_i2c_change_tau()

void airspeed_ms45xx_i2c_change_tau

(

float

new_tau

)

Definition at line 224 of file airspeed_ms45xx_i2c.c.

References get_butterworth_2_low_pass(), init_butterworth_2_low_pass(), AirspeedMs45xx::lowpass_tau, ms45xx, and ms45xx_filter.

Here is the call graph for this function:

ms45xx_i2c_event()

void ms45xx_i2c_event

(

void

)

Definition at line 244 of file airspeed_ms45xx_i2c.c.

References AirspeedMs45xx::airspeed, AUTOSET_NB_MAX, AirspeedMs45xx::autoset_offset, i2c_transaction::buf, I2CTransDone, I2CTransFailed, I2CTransSuccess, ms45xx, ms45xx_filter, MS45XX_RHO_DIV_2, MS45XX_SENDER_ID, ms45xx_trans, AirspeedMs45xx::offset_set, AirspeedMs45xx::pressure, AirspeedMs45xx::pressure_offset, AirspeedMs45xx::pressure_scale, AirspeedMs45xx::raw_p, sign(), i2c_transaction::status, status, AirspeedMs45xx::temperature, and update_butterworth_2_low_pass().

Here is the call graph for this function:

ms45xx_i2c_init()

void ms45xx_i2c_init

(

void

)

Definition at line 194 of file airspeed_ms45xx_i2c.c.

References AirspeedMs45xx::airspeed, DefaultPeriodic, I2CTransDone, init_butterworth_2_low_pass(), AirspeedMs45xx::lowpass_tau, ms45xx, ms45xx_downlink(), ms45xx_filter, MS45XX_LOWPASS_TAU, MS45XX_PRESSURE_OFFSET, MS45XX_PRESSURE_SCALE, MS45XX_PRESSURE_TYPE, ms45xx_trans, AirspeedMs45xx::offset_set, preflight_check_register(), AirspeedMs45xx::pressure, AirspeedMs45xx::pressure_offset, AirspeedMs45xx::pressure_scale, AirspeedMs45xx::pressure_type, AirspeedMs45xx::raw_p, register_periodic_telemetry(), i2c_transaction::status, and AirspeedMs45xx::temperature.

Here is the call graph for this function:

ms45xx_i2c_periodic()

void ms45xx_i2c_periodic

(

void

)

Definition at line 234 of file airspeed_ms45xx_i2c.c.

References i2c_receive(), I2CTransDone, MS45XX_I2C_ADDR, MS45XX_I2C_DEV, ms45xx_trans, and i2c_transaction::status.

Here is the call graph for this function:

Variable Documentation

ms45xx

struct AirspeedMs45xx ms45xx

extern

Definition at line 1 of file airspeed_ms45xx_i2c.c.

Referenced by airspeed_ms45xx_i2c_change_tau(), ms45xx_downlink(), ms45xx_i2c_event(), and ms45xx_i2c_init().