Proyecto digitales avanzados
Fork of BMP180 by
Diff: main.cpp
- Revision:
- 1:aa10a7465c76
- Parent:
- 0:06dc60296e6e
diff -r 06dc60296e6e -r aa10a7465c76 main.cpp --- a/main.cpp Thu Jul 03 20:05:55 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,91 +0,0 @@ -#include "mbed.h" -#include "BMP180.h" -#include "HT16K33.h" - -#define BMP180_ADDRESS 0x77<<1 - -uint32_t delt_t, count, tempcount; -float temperature, pressure, temppress, altitude; - -DigitalOut myled(LED1); - -BMP180 bmp180; // initialize BMP-180 altimeter - -HT16K33 led; // initialize bubble display - -Timer t; - -Serial pc(USBTX, USBRX); // tx, rx - -int main() { - - t.start(); - - led.initHT16K33(); // initialize bubble display - led.clearDsplay(display1); // clear bubble display1 - led.clearDsplay(display2); // clear bubble display2 - led.clearDsplay(display3); // clear bubble display1 - led.clearDsplay(display4); // clear bubble display2 - - // Read the WHO_AM_I register of the BMP-180, this is a good test of communication - uint8_t c = bmp180.readByte(BMP180_ADDRESS, BMP180_WHO_AM_I); - if(c == 0x55) { - - pc.printf("BMP-180 is 0x%x\n\r", c); - pc.printf("BMP-180 should be 0x55\n\r"); - pc.printf("BMP-180 online...\n\r"); - - bmp180.BMP180Calibration(); - pc.printf("BMP-180 calibration complete...\n\r"); - } - else - { - pc.printf("BMP-180 is 0x%x\n\r", c); - pc.printf("BMP-180 should be 0x55\n\r"); - while(1); // idle here forever - } - - ///////////////////////////////////////////////// - // main - ///////////////////////////////////////////////// - - while (1) { - - // Average over the display duty cycle to get the best pressure and altitude resolution - // The sample read time is on the order of 30 ms at the highest resolution using OSS = 3 - // Averaging over the display duty cycle is equivalent to averaging about 500/30 ~ 16 times - // per display output. If this is too much averaging, one can always reduce the display duty cycle - - temperature = (float)bmp180.BMP180GetTemperature()/10.0f; // Get temperature from BMP-180 in degrees C - temppress += (float)bmp180.BMP180GetPressure(); // Get pressure from BMP-180 in Pa - tempcount++; - - // Serial print and/or display at 0.5 s rate independent of data rates - delt_t = t.read_ms() - count; - if (delt_t > 500) { // update LCD once per half-second independent of read rate - - myled=!myled; - - pressure = temppress/tempcount; // use average pressure for reading to get ultra-high resolution - temperature = temperature*9.0f/5.0f + 32.0f; // convert to Fahrenheit - altitude = 44330.0f*( 1.0f - pow((pressure/101325.0f), (1.0f/5.255f))); // Calculate altitude in meters - - led.writeFloat(display1, temperature, 1); // display temperature in degrees Fahrenheit to bubble display - led.writeFloat(display2, pressure/1000, 2); // display pressure in mPa to bubble display - led.writeFloat(display3, altitude, 1); // display altitude in meters to bubble display - led.writeFloat(display4, altitude*3.281f, 1); // display altitude in feet to bubble display - - pc.printf("Temperature is %.1f C\n\r", temperature); - pc.printf("Pressure is %.3f mPa\n\r", pressure/1000.0f); - pc.printf("Altitude is %.1f m\n\r", altitude); - pc.printf("Altitude is %.1f ft\n\r", altitude*3.2810f); - pc.printf("\n\r"); - - - count = t.read_ms(); - temppress = 0; - tempcount = 0; - } - } -} -