LAURUS / Mbed 2 deprecated Laurus_height

read pressure and temperature from LPS25h.

Dependencies:   mbed

main.cpp

Committer:
onaka
Date:
2015-04-13
Revision:
0:955628fdbf95
Child:
1:813b3c3eb644

File content as of revision 0:955628fdbf95:

#include "mbed.h"
#include "LPS25H.h"

I2C i2c(I2C_SDA, I2C_SCL);
 
DigitalOut myled(LED1);
 
Serial pc(SERIAL_TX, SERIAL_RX);

LPS25H lps25h(i2c);

int main(){
 
    double p, t, h, p0;
    
    // Set reference value
    p0 = (double)lps25h.pressure()/4096.0;
    pc.printf("Set p0 = %7.2fhPa\n", p0);
 
    while (1) {
        // Read pressure & temperature
        p = (double)lps25h.pressure()/4096.0;
        t = 42.5 + (double)lps25h.temperature()/480.0;
 
        // Calculate altitude
        h = (pow((p0/p),0.1902)-1.0)*(t+273.15)/0.0065;
 
        // Display result
        pc.printf("height = %4.1fm, pressure = %7.2fhPa, temperature = %5.2fC\n", h, p, t);
        myled = !myled;
        wait(1.0);
    }
 
}