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BMP085 test
Fork of bmp085_lib by
Revision 2:5a2a1d891d40, committed 2015-04-05
- Comitter:
- khaledelmadawi
- Date:
- Sun Apr 05 19:17:27 2015 +0000
- Parent:
- 1:1d88eb9f5bbd
- Commit message:
- Bmp085 test
Changed in this revision
main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r 1d88eb9f5bbd -r 5a2a1d891d40 main.cpp --- a/main.cpp Thu Oct 14 11:27:32 2010 +0000 +++ b/main.cpp Sun Apr 05 19:17:27 2015 +0000 @@ -5,15 +5,57 @@ DigitalOut myled(LED1); Serial pc(USBTX, USBRX); +float get_altitude(float pressure); +Timer t; +Serial xbee1(p13, p14); -int main() { - while(1) { - myled = 1; +LocalFileSystem local("local"); //////setting the destination of the file that will be saved +float altitude,Max_altitude,altitude_node,pressure,Temperature; +int main() +{ + pc.baud(9600); + xbee1.baud(9600); - bmp085.update(); - pc.printf("p:%6.2f hPa / t:%6.2f C\n", bmp085.get_pressure(), bmp085.get_temperature()); - - myled = 0; - wait(3); + while(1) + { xbee1.printf("select any button to start operation\r\n"); + while(!xbee1.readable()/*||!pc.readable()*/); + xbee1.getc(); + + t.reset(); + t.start(); + FILE *fp=fopen("/local/out.xls","a"); + bmp085.update(); + //Temperature=alt_sensor.get_temperature(); + //pressure=alt_sensor.get_pressure(); + altitude_node=get_altitude(bmp085.get_pressure()); + Max_altitude=0; + while(1){ + if(xbee1.readable()) { + xbee1.getc(); + break; + } + bmp085.update(); + //Temperature=alt_sensor.get_temperature(); + //pressure=alt_sensor.get_pressure(); + altitude=get_altitude(bmp085.get_pressure())-altitude_node; + if(Max_altitude<altitude){ + Max_altitude=altitude; + } + xbee1.printf("altitude:%f Max_alt%f t:%f\r\n",altitude,Max_altitude,t.read()); + fprintf(fp,"%f \t %f \t %f \t %f \t %f\r\n",altitude,Max_altitude,pressure,Temperature,t.read()); + pc.printf("altitude:%f Max_alt%f t:%f\r\n",altitude,Max_altitude,t.read()); + } + fclose(fp); } } + + + +float get_altitude(float pressure){ + const float p0 = 1013.25; // Pressure at sea level (Pa) + float altitude; + + // Add this into loop(), after you've calculated the pressure + altitude = (float)44330 * (1 - (float)pow(((double) pressure/p0), 0.190295)); + return altitude; + }