main.cpp

00001 /* MS5611 Pressure sensor example
00002 Aerodyne Labs
00003 2014
00004  
00005 This example uses the MS511 Library to read the temperature and pressure readings 
00006 from the MS5611 sensor.  It has been modified from the MS507 sensor library with 
00007 the different calculations that the MS5611 requires.  Otherwise, this library is
00008 identical to the MS5607
00009 ------------
00010 IndNav: Made adaptions, even though, the original works well, problem:
00011 the original has a delay of 8ms from writing to reading (see line 73 in MS5611I2C.h)
00012 Solution: seperate write and read in 2 processes (hene's hint):
00013     - write at end of data_read thread, without waiting
00014     - at beginning of next call, read the data
00015 since there are 2 seperate reading/writings (one for pressure(altitude), one for Temperature -and we need both!)
00016 toggle the 2 processes, this results, that only every 2nd pressure/altitude value is a new value!
00017 
00018 altb 20.2.2020
00019 */
00020 #include "mbed.h"
00021  
00022 //Only uncomment the one needed.
00023 //#include "MS5611SPI.h"
00024 #include "MS5611I2C.h"
00025  
00026 Serial pc(USBTX, USBRX);                   // local terminal interface
00027 Timer timer;
00028 
00029 int main() {
00030     pc.baud(115200);                        // set up USB serial speed
00031     timer.reset();
00032     timer.start();
00033     //Only uncomment the I2C or SPI version.
00034     //MS5611SPI ms5611(p11, p12, p13, p10);
00035     //MS5611I2C ms5611(p9, p10, false);
00036     //PB_9 and PB_8 for Nucleo boards
00037     I2C i2c(PB_3,PB_10);
00038     MS5611I2C ms5611(i2c, false);
00039     //Print the Coefficients from the 
00040     ms5611.printCoefficients();
00041     while(1){
00042         timer.reset();
00043 //        float dum2 = ms5611.getTemperature();
00044 //        float dum3 = ms5611.getAltitude();
00045 //        printf("10 Durchlaeufe: %f sec \r\n", T);
00046 //        printf("Pressure = %.0f Pa \r\n", ms5611.getPressure());
00047 //        printf("Temperature = %.2f degC \r\n", ms5611.getTemperature());
00048         ms5611.getAltitude_toggle_Temp_write();
00049         wait_ms(100);
00050         printf("Altitude = %.2f m \r\n", ms5611.getAltitude_toggle_Temp_read());
00051         printf("Altitude = %.2f m \r\n", ms5611.getAltitude());
00052         float T = timer.read();
00053         wait(1.0);
00054     }
00055 }