Kevin Braun / ms5611

High resolution barometer and altimeter using i2c mode

Dependents:   upverter_fitbit_clone ReadingMag_HMC5883L_work

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ms5611 Class Reference
Public Member Functions

ms5611 Class Reference

Create ms5611 controller class. More...

#include <ms5611.h>

Public Member Functions

 ms5611 (PinName sda, PinName scl)
 Create a MS5611 object using the specified I2C object

  • User fixed I2C address 0xEE, CSB pin = 0
  • This is the default legacy constructor.

 ms5611 (PinName sda, PinName scl, CSBpolarity CSBpin)
 Create a MS5611 object using the specified I2C object

  • User defined use of the CSB pin
  • CSB pin = 0, user set I2C address to 0xEE
  • CSB pin = 1, user set I2C address to 0xEC.

void cmd_reset ()
 Initialize the MS5611 and set up the coefficients First - reset the MS5611 Second - load coefficient values from the MS5611 PROM Third - calculate coefficient checksum This routine only needs to be run once at boot up.
double calcTemp ()
 Calculate and return compensated temperature Returns double temperature in degC.
double calcPressure ()
 Calculate and return compensated barometric pressure Returns double pressure in millibars.
double getPressure ()
 Return compensated barometric pressure Returns double pressure in millibars DOES NOT RE-CALCULATE FIRST!!! Saves time if you calcTemp(); first.
float getAltitudeFT (float sea_pressure)
 Calculate and returns altitude in feet Returns float altitude in feet.
float getSeaLevelBaroFT (float known_alt)
 Calculate and returns sea level baro Returns float seal level barometer in feet.
float getSeaLevelBaroM (float known_alt)
 Calculate and returns sea level baro Returns float seal level barometer in meters.

Detailed Description

Create ms5611 controller class.

Parameters:
ms5611class

Definition at line 101 of file ms5611.h.

Constructor & Destructor Documentation

ms5611 ( PinName  sda,
PinName  scl 
)

Create a MS5611 object using the specified I2C object

  • User fixed I2C address 0xEE, CSB pin = 0
  • This is the default legacy constructor.

Parameters:
sda- mbed I2C interface pin
scl- mbed I2C interface pin

Definition at line 29 of file ms5611.cpp.

ms5611 ( PinName  sda,
PinName  scl,
CSBpolarity  CSBpin 
)

Create a MS5611 object using the specified I2C object

  • User defined use of the CSB pin
  • CSB pin = 0, user set I2C address to 0xEE
  • CSB pin = 1, user set I2C address to 0xEC.

Parameters:
sda- mbed I2C interface pin
scl- mbed I2C interface pin
ms5611::CSBpin_0- CSB pin tied to ground
ms5611::CSBpin_1- CSB pin tied to VDD

Definition at line 38 of file ms5611.cpp.

Member Function Documentation

double calcPressure (  )

Calculate and return compensated barometric pressure Returns double pressure in millibars.

calculate pressure

Parameters:
NONE
Returns:
double barometric pressure millibar

Definition at line 342 of file ms5611.cpp.

double calcTemp (  )

Calculate and return compensated temperature Returns double temperature in degC.

calculate temperature

Parameters:
NONE
Returns:
double temperature degC

Definition at line 331 of file ms5611.cpp.

void cmd_reset (  )

Initialize the MS5611 and set up the coefficients First - reset the MS5611 Second - load coefficient values from the MS5611 PROM Third - calculate coefficient checksum This routine only needs to be run once at boot up.

send reset sequence

Parameters:
NONE
Returns:
none

Definition at line 132 of file ms5611.cpp.

float getAltitudeFT ( float  sea_pressure )

Calculate and returns altitude in feet Returns float altitude in feet.

get altitude from known sea level barometer, @ no pre-pressure calculation

Parameters:
floatknown pressure (mB) at sea level

float sea level barometer

Returns:
float altitude in feet

Definition at line 366 of file ms5611.cpp.

double getPressure (  )

Return compensated barometric pressure Returns double pressure in millibars DOES NOT RE-CALCULATE FIRST!!! Saves time if you calcTemp(); first.

get pressure, no calculation

Parameters:
NONE
Returns:
double barometric pressure millibar

Definition at line 353 of file ms5611.cpp.

float getSeaLevelBaroFT ( float  known_alt )

Calculate and returns sea level baro Returns float seal level barometer in feet.

get sea level pressure from known altitude(ft), @ no pre-pressure calculation

Parameters:
floatknown altitude in feet

float known altitude in feet

Returns:
float seal level barometer in mb

Definition at line 379 of file ms5611.cpp.

float getSeaLevelBaroM ( float  known_alt )

Calculate and returns sea level baro Returns float seal level barometer in meters.

get sea level pressure from known altitude(m), @ no pre-pressure calculation

Parameters:
floatknown altitude in meters

float known altitude in meters

Returns:
float seal level barometer in mb

Definition at line 392 of file ms5611.cpp.

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