diff options
Diffstat (limited to 'usb-bmp180/usb-bmp180.c')
| -rw-r--r-- | usb-bmp180/usb-bmp180.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/usb-bmp180/usb-bmp180.c b/usb-bmp180/usb-bmp180.c deleted file mode 100644 index dabca95..0000000 --- a/usb-bmp180/usb-bmp180.c +++ /dev/null @@ -1,162 +0,0 @@ -/* - * spreadspace avr utils - usb-bmp180 example - * - * - * Copyright (C) 2016 Bernhard Tittelbach <bernhard@tittelbach.org> - * basically this is refactored and enhanced code from: - * https://github.com/sparkfun/BMP180_Breakout_Arduino_Library - * Please buy the sparkfun people Beer when you see them!!!! - * - * This file is part of spreadspace avr utils. - * - * spreadspace avr utils is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * any later version. - * - * spreadspace avr utils is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <avr/io.h> -#include <avr/wdt.h> -#include <avr/interrupt.h> -#include <util/delay.h> -#include <stdio.h> - -#include "util.h" -#include "led.h" -#include "usbio.h" - -#include "Arduino.h" -#include "SFE_BMP180.h" - - -SFE_BMP180 pressure; - -#define ALTITUDE 353.0 // Altitude of Graz in Austria - - -int main(void) -{ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - cpu_init(); - led_init(); - usbio_init(); - sei(); - - arduino_init(); - - if (pressure.begin()) - printf("BMP180 init success"); - else - { - // Oops, something went wrong, this is usually a connection problem, - // see the comments at the top of this sketch for the proper connections. - - printf("BMP180 init fail\n\n"); - while(1); // Pause forever. - } - - for(;;) { - usbio_task(); - - char status; - double T,P,p0,a; - - // Loop here getting pressure readings every 10 seconds. - - // If you want sea-level-compensated pressure, as used in weather reports, - // you will need to know the altitude at which your measurements are taken. - // We're using a constant called ALTITUDE in this sketch: - - printf("\nprovided altitude: "); - printf(ALTITUDE,0); - printf(" meters, "); - printf(ALTITUDE*3.28084,0); - printf(" feet\n"); - - // If you want to measure altitude, and not pressure, you will instead need - // to provide a known baseline pressure. This is shown at the end of the sketch. - - // You must first get a temperature measurement to perform a pressure reading. - - // Start a temperature measurement: - // If request is successful, the number of ms to wait is returned. - // If request is unsuccessful, 0 is returned. - - status = pressure.startTemperature(); - if (status != 0) - { - // Wait for the measurement to complete: - _delay_ms(status); - - // Retrieve the completed temperature measurement: - // Note that the measurement is stored in the variable T. - // Function returns 1 if successful, 0 if failure. - - status = pressure.getTemperature(T); - if (status != 0) - { - // Print out the measurement: - printf("temperature: %02d degC\n",T); - - // Start a pressure measurement: - // The parameter is the oversampling setting, from 0 to 3 (highest res, longest wait). - // If request is successful, the number of ms to wait is returned. - // If request is unsuccessful, 0 is returned. - - status = pressure.startPressure(3); - if (status != 0) - { - // Wait for the measurement to complete: - _delay_ms(status); - - // Retrieve the completed pressure measurement: - // Note that the measurement is stored in the variable P. - // Note also that the function requires the previous temperature measurement (T). - // (If temperature is stable, you can do one temperature measurement for a number of pressure measurements.) - // Function returns 1 if successful, 0 if failure. - - status = pressure.getPressure(P,T); - if (status != 0) - { - // Print out the measurement: - printf("absolute pressure: %02d mb, %02d inHg\n", P, P*0.0295333727); - - // The pressure sensor returns abolute pressure, which varies with altitude. - // To remove the effects of altitude, use the sealevel function and your current altitude. - // This number is commonly used in weather reports. - // Parameters: P = absolute pressure in mb, ALTITUDE = current altitude in m. - // Result: p0 = sea-level compensated pressure in mb - - p0 = pressure.sealevel(P,ALTITUDE); // we're at 1655 meters (Boulder, CO) - printf("relative (sea-level) pressure: %02d mb, %0d2 inHg", p0, p0*0.0295333727); - - // On the other hand, if you want to determine your altitude from the pressure reading, - // use the altitude function along with a baseline pressure (sea-level or other). - // Parameters: P = absolute pressure in mb, p0 = baseline pressure in mb. - // Result: a = altitude in m. - - a = pressure.altitude(P,p0); - printf("computed altitude: %dm\n",a); - } - else printf("error retrieving pressure measurement\n"); - } - else printf("error starting pressure measurement\n"); - } - else printf("error retrieving temperature measurement\n"); - } - else printf("error starting temperature measurement\n"); - - _delay_ms(5000); // Pause for 5 seconds. - - } -} |