Orefatoi / Mbed 2 deprecated afero_poc15_171201

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Dependencies:   mbed vt100

sensors/PSE530.cpp@0:f0de320e23ac, 2017-12-01 (annotated)

Committer:
Rhyme
Date:
Fri Dec 01 06:16:31 2017 +0000
Revision:
0:f0de320e23ac
Child:
10:88e5b8157167
OLED display for GAS pressure started working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:f0de320e23ac 1 #include "mbed.h"
Rhyme 0:f0de320e23ac 2 #include "PSE530.h"
Rhyme 0:f0de320e23ac 3
Rhyme 0:f0de320e23ac 4 /**
Rhyme 0:f0de320e23ac 5 * SMC PSE530 pressure sensor
Rhyme 0:f0de320e23ac 6 * analog output 1.0V - 5.0V
Rhyme 0:f0de320e23ac 7 * 1.0V : 0
Rhyme 0:f0de320e23ac 8 * 5.0V : 1MPa
Rhyme 0:f0de320e23ac 9 * (at 0.6V : -0.1MPa)
Rhyme 0:f0de320e23ac 10 * Our sensor I/F converts 0-5V to 0-3V
Rhyme 0:f0de320e23ac 11 * So we suppose V = Analog Float Value : Pressure
Rhyme 0:f0de320e23ac 12 * 0.6V = 0.2 : 0
Rhyme 0:f0de320e23ac 13 * 3.0V = 1.0 : 1MPa
Rhyme 0:f0de320e23ac 14 */
Rhyme 0:f0de320e23ac 15
Rhyme 0:f0de320e23ac 16 /**
Rhyme 0:f0de320e23ac 17 * conversion from Pa to kgf/cm2
Rhyme 0:f0de320e23ac 18 * 98,066.5 Pa = 1 kgf/cm2
Rhyme 0:f0de320e23ac 19 * 1 Pa = 1 / 98066.6 kgf/cm2
Rhyme 0:f0de320e23ac 20 */
Rhyme 0:f0de320e23ac 21
Rhyme 0:f0de320e23ac 22 PSE530::PSE530(AnalogIn *ain)
Rhyme 0:f0de320e23ac 23 {
Rhyme 0:f0de320e23ac 24 _ain = ain ;
Rhyme 0:f0de320e23ac 25 }
Rhyme 0:f0de320e23ac 26
Rhyme 0:f0de320e23ac 27 PSE530::~PSE530(void)
Rhyme 0:f0de320e23ac 28 {
Rhyme 0:f0de320e23ac 29 if (_ain) {
Rhyme 0:f0de320e23ac 30 delete _ain ;
Rhyme 0:f0de320e23ac 31 }
Rhyme 0:f0de320e23ac 32 }
Rhyme 0:f0de320e23ac 33
Rhyme 0:f0de320e23ac 34 float PSE530::getPressure(void)
Rhyme 0:f0de320e23ac 35 {
Rhyme 0:f0de320e23ac 36 float value = 0.0 ;
Rhyme 0:f0de320e23ac 37 value = 1000000 * _ain->read() ; /* 1MPa at 1.0 */
Rhyme 0:f0de320e23ac 38 value = value / 98066.5 ; /* Pa -> kgf/cm2 */
Rhyme 0:f0de320e23ac 39 return( value ) ;
Rhyme 0:f0de320e23ac 40 }