Hugo Perez / Mbed 2 deprecated WIGO_MPL3115A2

Demo program for the MPL3115A2 library.

Dependencies:   FOCOMETROPRESION mbed

Fork of WIGO_MPL3115A2 by clemente di caprio

main.cpp@8:c415332bdea7, 2014-10-02 (annotated)

Committer:
perezalvarezhi
Date:
Thu Oct 02 21:31:27 2014 +0000
Revision:
8:c415332bdea7
Parent:
7:97f5edf7d270 
adfasdf

Who changed what in which revision?

UserRevisionLine numberNew contents of line
clemente 0:5d92b48edaff 1 #include "mbed.h"
clemente 0:5d92b48edaff 2 #include "MPL3115A2.h"
clemente 0:5d92b48edaff 3
clemente 0:5d92b48edaff 4 #define MPL3115A2_I2C_ADDRESS (0x60<<1)
perezalvarezhi 8:c415332bdea7 5 #define
clemente 0:5d92b48edaff 6 DigitalOut myled(LED1);
perezalvarezhi 8:c415332bdea7 7 MPL3115A2 wigo_sensor1( PTC9, PTC8, MPL3115A2_I2C_ADDRESS);
clemente 0:5d92b48edaff 8 Serial pc(USBTX, USBRX);
clemente 0:5d92b48edaff 9
clemente 0:5d92b48edaff 10 /* pos [0] = altimeter or pressure value */
clemente 0:5d92b48edaff 11 /* pos [1] = temperature value */
clemente 0:5d92b48edaff 12 float sensor_data[2];
clemente 0:5d92b48edaff 13
clemente 2:0b726b8c8ab9 14 void dataready( void); // callback function for data streaming using Interrupt
clemente 2:0b726b8c8ab9 15 void alttrigger( void);
clemente 2:0b726b8c8ab9 16
clemente 3:e2a621ea6976 17 /* Helper functions to print out as float the raw data */
clemente 3:e2a621ea6976 18 float print_PressureValue( unsigned char *dt);
clemente 3:e2a621ea6976 19 float print_AltimiterValue( unsigned char *dt);
clemente 3:e2a621ea6976 20 float print_TemperatureValue( unsigned char *dt);
clemente 3:e2a621ea6976 21
clemente 0:5d92b48edaff 22 int main() {
perezalvarezhi 8:c415332bdea7 23 pc.baud(9600);
clemente 2:0b726b8c8ab9 24 pc.printf("MPL3115A2 Sensor. [%X]\r\n", wigo_sensor1.getDeviceID());
clemente 7:97f5edf7d270 25 // ***** Data acquisition using polling method and delta values
clemente 7:97f5edf7d270 26 // Array for the dela values
perezalvarezhi 8:c415332bdea7 27 //float delta[2];
clemente 7:97f5edf7d270 28
clemente 7:97f5edf7d270 29 // Set over sampling value (see MPL3115A2.h for details)
clemente 7:97f5edf7d270 30 wigo_sensor1.Oversample_Ratio( OVERSAMPLE_RATIO_128);
clemente 7:97f5edf7d270 31 // Configure the sensor as Barometer.
clemente 7:97f5edf7d270 32 wigo_sensor1.Barometric_Mode();
perezalvarezhi 8:c415332bdea7 33 int i =0;
clemente 7:97f5edf7d270 34 while(1) {
clemente 7:97f5edf7d270 35 //
perezalvarezhi 8:c415332bdea7 36 if ( wigo_sensor1.getAllData( &sensor_data[0]) ) {
clemente 7:97f5edf7d270 37 pc.printf("\tPressure: %f\tTemperature: %f\r\n", sensor_data[0], sensor_data[1]);
perezalvarezhi 8:c415332bdea7 38 //pc.printf("\tDelatPress: %f\tDeltaTemp: %f\r\n", delta[0], delta[1]);
perezalvarezhi 8:c415332bdea7 39 }else{
perezalvarezhi 8:c415332bdea7 40 pc.printf("Not reading any more");
clemente 7:97f5edf7d270 41 }
perezalvarezhi 8:c415332bdea7 42 pc.printf("Measurement# %d",i);
perezalvarezhi 8:c415332bdea7 43 i++;
clemente 7:97f5edf7d270 44 //
clemente 7:97f5edf7d270 45 wait( 1.0);
clemente 7:97f5edf7d270 46 }
clemente 7:97f5edf7d270 47
clemente 6:07f92b4716b6 48
clemente 6:07f92b4716b6 49
clemente 0:5d92b48edaff 50 }
clemente 2:0b726b8c8ab9 51
clemente 2:0b726b8c8ab9 52 void dataready( void)
clemente 2:0b726b8c8ab9 53 {
clemente 2:0b726b8c8ab9 54 wigo_sensor1.getAllData( &sensor_data[0]);
clemente 2:0b726b8c8ab9 55 pc.printf("\tPressure: %f\tTemperature: %f\r\n", sensor_data[0], sensor_data[1]);
clemente 2:0b726b8c8ab9 56 }
clemente 3:e2a621ea6976 57
clemente 3:e2a621ea6976 58 float print_PressureValue( unsigned char *dt)
clemente 3:e2a621ea6976 59 {
clemente 3:e2a621ea6976 60 unsigned int prs;
clemente 3:e2a621ea6976 61 float fprs;
clemente 3:e2a621ea6976 62
clemente 3:e2a621ea6976 63 /*
clemente 3:e2a621ea6976 64 * dt[0] = Bits 12-19 of 20-bit real-time Pressure sample. (b7-b0)
clemente 3:e2a621ea6976 65 * dt[1] = Bits 4-11 of 20-bit real-time Pressure sample. (b7-b0)
clemente 3:e2a621ea6976 66 * dt[2] = Bits 0-3 of 20-bit real-time Pressure sample (b7-b4)
clemente 3:e2a621ea6976 67 */
clemente 3:e2a621ea6976 68 prs = (dt[0]<<10) | (dt[1]<<2) | (dt[2]>>6);
clemente 3:e2a621ea6976 69 //
clemente 3:e2a621ea6976 70 fprs = (float)prs * 1.0f;
clemente 3:e2a621ea6976 71
clemente 3:e2a621ea6976 72 if ( dt[2] & 0x20)
clemente 3:e2a621ea6976 73 fprs += 0.25f;
clemente 3:e2a621ea6976 74 if ( dt[2] & 0x10)
clemente 3:e2a621ea6976 75 fprs += 0.5f;
clemente 3:e2a621ea6976 76
clemente 3:e2a621ea6976 77 return fprs;
clemente 3:e2a621ea6976 78 }
clemente 3:e2a621ea6976 79
clemente 3:e2a621ea6976 80 float print_AltimiterValue( unsigned char *dt)
clemente 3:e2a621ea6976 81 {
clemente 3:e2a621ea6976 82 unsigned short altm;
clemente 3:e2a621ea6976 83 float faltm;
clemente 3:e2a621ea6976 84
clemente 3:e2a621ea6976 85 /*
clemente 3:e2a621ea6976 86 * dt[0] = Bits 12-19 of 20-bit real-time Altitude sample. (b7-b0)
clemente 3:e2a621ea6976 87 * dt[1] = Bits 4-11 of 20-bit real-time Altitude sample. (b7-b0)
clemente 3:e2a621ea6976 88 * dt[2] = Bits 0-3 of 20-bit real-time Altitude sample (b7-b4)
clemente 3:e2a621ea6976 89 */
clemente 3:e2a621ea6976 90 altm = (dt[0]<<8) | dt[1];
clemente 3:e2a621ea6976 91 //
clemente 3:e2a621ea6976 92 if ( dt[0] > 0x7F) {
clemente 3:e2a621ea6976 93 altm = ~altm + 1;
clemente 3:e2a621ea6976 94 faltm = (float)altm * -1.0f;
clemente 3:e2a621ea6976 95 } else {
clemente 3:e2a621ea6976 96 faltm = (float)altm * 1.0f;
clemente 3:e2a621ea6976 97 }
clemente 3:e2a621ea6976 98 //
clemente 3:e2a621ea6976 99 faltm = faltm+((float)(dt[2]>>4) * 0.0625f);
clemente 3:e2a621ea6976 100 return faltm;
clemente 3:e2a621ea6976 101 }
clemente 3:e2a621ea6976 102
clemente 3:e2a621ea6976 103 float print_TemperatureValue( unsigned char *dt)
clemente 3:e2a621ea6976 104 {
clemente 3:e2a621ea6976 105 unsigned short temp;
clemente 3:e2a621ea6976 106 float ftemp;
clemente 3:e2a621ea6976 107
clemente 3:e2a621ea6976 108 /*
clemente 3:e2a621ea6976 109 * dt[0] = Bits 4-11 of 16-bit real-time temperature sample. (b7-b0)
clemente 3:e2a621ea6976 110 * dt[1] = Bits 0-3 of 16-bit real-time temperature sample. (b7-b4)
clemente 3:e2a621ea6976 111 */
clemente 3:e2a621ea6976 112 temp = dt[0];
clemente 3:e2a621ea6976 113 //
clemente 3:e2a621ea6976 114 if ( dt[0] > 0x7F) {
clemente 3:e2a621ea6976 115 temp = ~temp + 1;
clemente 3:e2a621ea6976 116 ftemp = (float)temp * -1.0f;
clemente 3:e2a621ea6976 117 } else {
clemente 3:e2a621ea6976 118 ftemp = (float)temp * 1.0f;
clemente 3:e2a621ea6976 119 }
clemente 3:e2a621ea6976 120 //
clemente 3:e2a621ea6976 121 ftemp = ftemp+((float)(dt[1]>>4) * 0.0625f);
clemente 3:e2a621ea6976 122 return ftemp;
clemente 3:e2a621ea6976 123
clemente 3:e2a621ea6976 124 }
clemente 3:e2a621ea6976 125