Flying Sea Glider / Mbed 2 deprecated 2019_19feb19_jcw_noSD

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed MODSERIAL FATFileSystem

omegaPX209/omegaPX209.hpp@14:85b64a4d08e8, 2017-10-31 (annotated)

Committer:
danstrider
Date:
Tue Oct 31 17:06:52 2017 +0000
Revision:
14:85b64a4d08e8
Parent:
10:085ab7328054
Child:
17:7c16b5671d0e
New depth sensor class with tare and oversampling.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mkelly10 9:d5fcdcb3c89d 1 /*
danstrider 14:85b64a4d08e8 2 This class wraps an Omega pressure transducer.
danstrider 14:85b64a4d08e8 3 Author: Matthew, October 24th, 2013
danstrider 14:85b64a4d08e8 4 Modified: Dan, 2017-10-30
mkelly10 9:d5fcdcb3c89d 5 */
mkelly10 9:d5fcdcb3c89d 6
mkelly10 9:d5fcdcb3c89d 7 #include "mbed.h"
mkelly10 9:d5fcdcb3c89d 8
danstrider 14:85b64a4d08e8 9 #define water_density_kg_m3 1000 // fresh water density [kg/m^3] (1029 for sea water)
danstrider 14:85b64a4d08e8 10 #define grav_m_s2 9.80665 // gravitational constant [m/s^2]
danstrider 14:85b64a4d08e8 11
danstrider 14:85b64a4d08e8 12 #define m2ft 3.28084 // convert m to ft
danstrider 14:85b64a4d08e8 13 #define psi2Pa 6894.76 // convert psi to Pa
danstrider 14:85b64a4d08e8 14
danstrider 14:85b64a4d08e8 15 #define OVERSAMPLE 20 // number of oversamples
danstrider 10:085ab7328054 16
mkelly10 9:d5fcdcb3c89d 17 class omegaPX209 {
mkelly10 9:d5fcdcb3c89d 18 public:
danstrider 10:085ab7328054 19 omegaPX209(PinName pin);
danstrider 14:85b64a4d08e8 20 void init();
danstrider 14:85b64a4d08e8 21 float tare(); // tares reading to ambient pressure
danstrider 14:85b64a4d08e8 22
danstrider 14:85b64a4d08e8 23 float getPsi(); // returns pressure [psi]
danstrider 14:85b64a4d08e8 24 float getDepthFt(); // returns water depth [ft]
danstrider 14:85b64a4d08e8 25
danstrider 14:85b64a4d08e8 26 void setZero(float zeroPsi); // lets user set a different ambient pressure [psi] ... tare, effectively
danstrider 14:85b64a4d08e8 27 float getZero(); // returns the internal ambient pressure [psi]
danstrider 14:85b64a4d08e8 28
mkelly10 9:d5fcdcb3c89d 29 private:
danstrider 14:85b64a4d08e8 30 AnalogIn _adc;
danstrider 14:85b64a4d08e8 31
danstrider 14:85b64a4d08e8 32 float _psi; // pressure [psi]
danstrider 14:85b64a4d08e8 33 float _zeroPsi; // atmospheric pressure at sea level [psi]
danstrider 14:85b64a4d08e8 34 float _adcVoltage; // voltage of mbed ADC system [V]
danstrider 14:85b64a4d08e8 35 float _fullscale; // maximum pressure of the sensor [psi]
danstrider 14:85b64a4d08e8 36 float _cal; // psi per volt calibration [psi/V]
mkelly10 9:d5fcdcb3c89d 37 };