LAURUS / Mbed 2 deprecated Laurus_height

read pressure and temperature from LPS25h.

Dependencies:   mbed

main.cpp@0:955628fdbf95, 2015-04-13 (annotated)

Committer:
onaka
Date:
Mon Apr 13 06:39:17 2015 +0000
Revision:
0:955628fdbf95
Child:
1:813b3c3eb644
deafault

Who changed what in which revision?

UserRevisionLine numberNew contents of line
onaka 0:955628fdbf95 1 #include "mbed.h"
onaka 0:955628fdbf95 2 #include "LPS25H.h"
onaka 0:955628fdbf95 3
onaka 0:955628fdbf95 4 I2C i2c(I2C_SDA, I2C_SCL);
onaka 0:955628fdbf95 5
onaka 0:955628fdbf95 6 DigitalOut myled(LED1);
onaka 0:955628fdbf95 7
onaka 0:955628fdbf95 8 Serial pc(SERIAL_TX, SERIAL_RX);
onaka 0:955628fdbf95 9
onaka 0:955628fdbf95 10 LPS25H lps25h(i2c);
onaka 0:955628fdbf95 11
onaka 0:955628fdbf95 12 int main(){
onaka 0:955628fdbf95 13
onaka 0:955628fdbf95 14 double p, t, h, p0;
onaka 0:955628fdbf95 15
onaka 0:955628fdbf95 16 // Set reference value
onaka 0:955628fdbf95 17 p0 = (double)lps25h.pressure()/4096.0;
onaka 0:955628fdbf95 18 pc.printf("Set p0 = %7.2fhPa\n", p0);
onaka 0:955628fdbf95 19
onaka 0:955628fdbf95 20 while (1) {
onaka 0:955628fdbf95 21 // Read pressure & temperature
onaka 0:955628fdbf95 22 p = (double)lps25h.pressure()/4096.0;
onaka 0:955628fdbf95 23 t = 42.5 + (double)lps25h.temperature()/480.0;
onaka 0:955628fdbf95 24
onaka 0:955628fdbf95 25 // Calculate altitude
onaka 0:955628fdbf95 26 h = (pow((p0/p),0.1902)-1.0)*(t+273.15)/0.0065;
onaka 0:955628fdbf95 27
onaka 0:955628fdbf95 28 // Display result
onaka 0:955628fdbf95 29 pc.printf("height = %4.1fm, pressure = %7.2fhPa, temperature = %5.2fC\n", h, p, t);
onaka 0:955628fdbf95 30 myled = !myled;
onaka 0:955628fdbf95 31 wait(1.0);
onaka 0:955628fdbf95 32 }
onaka 0:955628fdbf95 33
onaka 0:955628fdbf95 34 }
onaka 0:955628fdbf95 35
onaka 0:955628fdbf95 36