Ouyi Ruan / Mbed 2 deprecated ProjectD

Project D - Weather Station

Dependencies:   BMP180 N5110 beep mbed

main.cpp@0:e0e85d08133d, 2015-05-10 (annotated)

Committer:
oe386961252
Date:
Sun May 10 00:12:30 2015 +0000
Revision:
0:e0e85d08133d
Project D - Weather Station

Who changed what in which revision?

UserRevisionLine numberNew contents of line
oe386961252 0:e0e85d08133d 1 #include "mbed.h"
oe386961252 0:e0e85d08133d 2 #include "N5110.h"
oe386961252 0:e0e85d08133d 3 #include "beep.h"
oe386961252 0:e0e85d08133d 4 #include "BMP180.h"
oe386961252 0:e0e85d08133d 5
oe386961252 0:e0e85d08133d 6 N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
oe386961252 0:e0e85d08133d 7 Beep buzzer(p21);
oe386961252 0:e0e85d08133d 8 BusOut leds(LED4,LED3,LED2,LED1);
oe386961252 0:e0e85d08133d 9 BMP180 bmp180(p28,p27);
oe386961252 0:e0e85d08133d 10 InterruptIn button(p15);
oe386961252 0:e0e85d08133d 11 DigitalOut led(p24);
oe386961252 0:e0e85d08133d 12
oe386961252 0:e0e85d08133d 13 #define up 1
oe386961252 0:e0e85d08133d 14 #define down 0
oe386961252 0:e0e85d08133d 15
oe386961252 0:e0e85d08133d 16 int state = up;
oe386961252 0:e0e85d08133d 17
oe386961252 0:e0e85d08133d 18 int buttonFlag = 0;
oe386961252 0:e0e85d08133d 19
oe386961252 0:e0e85d08133d 20 void buttonPressed()
oe386961252 0:e0e85d08133d 21 {
oe386961252 0:e0e85d08133d 22 state = ! state;
oe386961252 0:e0e85d08133d 23 }
oe386961252 0:e0e85d08133d 24
oe386961252 0:e0e85d08133d 25
oe386961252 0:e0e85d08133d 26
oe386961252 0:e0e85d08133d 27
oe386961252 0:e0e85d08133d 28 int main()
oe386961252 0:e0e85d08133d 29 {
oe386961252 0:e0e85d08133d 30 lcd.init();
oe386961252 0:e0e85d08133d 31 bmp180.init();
oe386961252 0:e0e85d08133d 32
oe386961252 0:e0e85d08133d 33 //startup picture
oe386961252 0:e0e85d08133d 34 //the project name is Weather Station, print it on screen
oe386961252 0:e0e85d08133d 35 lcd.printString("Weather",1,1);
oe386961252 0:e0e85d08133d 36 lcd.printString("Station",1,2);
oe386961252 0:e0e85d08133d 37
oe386961252 0:e0e85d08133d 38 wait(2.0); //keep the startup picture for 2 seconds
oe386961252 0:e0e85d08133d 39 lcd.clear(); //clear the screen
oe386961252 0:e0e85d08133d 40 buzzer.beep(2000,1.0); //the buzzer beeps at 2000Hz for 1 second
oe386961252 0:e0e85d08133d 41 Measurement measurement; //start to measure temperature and atmosphere pressure
oe386961252 0:e0e85d08133d 42 button.rise(&buttonPressed); //check the button rised
oe386961252 0:e0e85d08133d 43
oe386961252 0:e0e85d08133d 44
oe386961252 0:e0e85d08133d 45 while(1)
oe386961252 0:e0e85d08133d 46 {
oe386961252 0:e0e85d08133d 47 measurement = bmp180.readValues();
oe386961252 0:e0e85d08133d 48 char celsius[14];//create a bufffer named celsius
oe386961252 0:e0e85d08133d 49 int length = sprintf(celsius,"T = %.2f C",measurement.temperature); //The value measured by the sensor is put into the variable "celsius". And it is displayed on screen.
oe386961252 0:e0e85d08133d 50
oe386961252 0:e0e85d08133d 51 char pressure[14];//create a bufffer named pressure
oe386961252 0:e0e85d08133d 52
oe386961252 0:e0e85d08133d 53 //The value measured by the sensor is put into the variable "pressure". And it is displayed on screen.
oe386961252 0:e0e85d08133d 54 length = sprintf(pressure,"P = %.2f hPa",measurement.pressure);
oe386961252 0:e0e85d08133d 55
oe386961252 0:e0e85d08133d 56 float f = (measurement.temperature + 32)*1.8; //the formula to change unit between Celsius and Fahrenheit.
oe386961252 0:e0e85d08133d 57 char fahrenheit[14];
oe386961252 0:e0e85d08133d 58
oe386961252 0:e0e85d08133d 59 //display values on screen
oe386961252 0:e0e85d08133d 60 length = sprintf(fahrenheit,"T = %.2f F",f);
oe386961252 0:e0e85d08133d 61
oe386961252 0:e0e85d08133d 62 //All words will stay on screen for 1 second in case that the numbers changes too fast to read.
oe386961252 0:e0e85d08133d 63 wait(1.0);
oe386961252 0:e0e85d08133d 64 lcd.clear();
oe386961252 0:e0e85d08133d 65
oe386961252 0:e0e85d08133d 66
oe386961252 0:e0e85d08133d 67
oe386961252 0:e0e85d08133d 68 switch(state)
oe386961252 0:e0e85d08133d 69 {
oe386961252 0:e0e85d08133d 70 case up:
oe386961252 0:e0e85d08133d 71 state = 1;
oe386961252 0:e0e85d08133d 72 lcd.printString("Celsius",0,0); //Celsius is shown in the first line on the screen. The default unit of temperature is Celsius.
oe386961252 0:e0e85d08133d 73
oe386961252 0:e0e85d08133d 74 //Atmosphere Pressure is shown in the 3rd and 4th line on screen.
oe386961252 0:e0e85d08133d 75 lcd.printString("Atmosphere",0,3);
oe386961252 0:e0e85d08133d 76 lcd.printString("Pressure",0,4);
oe386961252 0:e0e85d08133d 77
oe386961252 0:e0e85d08133d 78 //display the values of temperature and air pressure
oe386961252 0:e0e85d08133d 79 lcd.printString(celsius,0,1);
oe386961252 0:e0e85d08133d 80 lcd.printString(pressure,0,5);
oe386961252 0:e0e85d08133d 81 break;
oe386961252 0:e0e85d08133d 82
oe386961252 0:e0e85d08133d 83 case down:
oe386961252 0:e0e85d08133d 84 state = 0;
oe386961252 0:e0e85d08133d 85 lcd.printString("Fahrenheit",0,0); //Fahrenheit is shown in the first line on the screen. The default unit of temperature is Fahrenheit.
oe386961252 0:e0e85d08133d 86
oe386961252 0:e0e85d08133d 87 //Atmosphere Pressure is shown in the 3rd and 4th line on screen.
oe386961252 0:e0e85d08133d 88 lcd.printString("Atmosphere",0,3);
oe386961252 0:e0e85d08133d 89 lcd.printString("Pressure",0,4);
oe386961252 0:e0e85d08133d 90
oe386961252 0:e0e85d08133d 91 //display the values of temperature and air pressure
oe386961252 0:e0e85d08133d 92 lcd.printString(fahrenheit,0,1);
oe386961252 0:e0e85d08133d 93 lcd.printString(pressure,0,5);
oe386961252 0:e0e85d08133d 94 default:
oe386961252 0:e0e85d08133d 95 break;
oe386961252 0:e0e85d08133d 96 }
oe386961252 0:e0e85d08133d 97
oe386961252 0:e0e85d08133d 98
oe386961252 0:e0e85d08133d 99
oe386961252 0:e0e85d08133d 100 //set a range of suitable temperature
oe386961252 0:e0e85d08133d 101 //if temperature is greater than 28 degrees,the buzzer will beep at 3000Hz for 0.5 seconds and the LED will work.
oe386961252 0:e0e85d08133d 102 if (measurement.temperature >= 28.00)
oe386961252 0:e0e85d08133d 103 {
oe386961252 0:e0e85d08133d 104 buzzer.beep(3000,0.5); //the buzzer beeps at 3000Hz for 0.5 seconds
oe386961252 0:e0e85d08133d 105 led = 1; //the LED works
oe386961252 0:e0e85d08133d 106 }
oe386961252 0:e0e85d08133d 107
oe386961252 0:e0e85d08133d 108 //if temperature is less than 25 degrees, the buzzer will beep at 2000Hz for 1 second and LED will not work.
oe386961252 0:e0e85d08133d 109 else if (measurement.temperature <= 25.00)
oe386961252 0:e0e85d08133d 110 {
oe386961252 0:e0e85d08133d 111 buzzer.beep(2000,1.0); //the buzzer beeps at 2000Hz for 1 second
oe386961252 0:e0e85d08133d 112 led = 0; //LED does not work
oe386961252 0:e0e85d08133d 113 }
oe386961252 0:e0e85d08133d 114
oe386961252 0:e0e85d08133d 115 //if temperature is between 25 to 28 degrees, neither of the buzzer and the LED works.
oe386961252 0:e0e85d08133d 116 else
oe386961252 0:e0e85d08133d 117 {
oe386961252 0:e0e85d08133d 118 buzzer.nobeep(); //buzzer no beeping
oe386961252 0:e0e85d08133d 119 led =0; //LED off
oe386961252 0:e0e85d08133d 120 }
oe386961252 0:e0e85d08133d 121 }
oe386961252 0:e0e85d08133d 122
oe386961252 0:e0e85d08133d 123 }
oe386961252 0:e0e85d08133d 124