main.cpp

00001 /**
00002 @Header file name.h
00003 @Project-D Weather Station
00004 @file main.cpp
00005 @author Li XingYu
00006 @date May 2015
00007 */
00008 
00009 #include "mbed.h"
00010 #include "N5110.h"
00011 #include "BMP180.h"
00012 
00013 /**
00014 @namespace lcd,bmp180,serial
00015 @brief serial connects to micro-controller
00016 @brief
00017 */
00018 
00019 //The pins of N5110, BMP180 which are connected to micro-controller
00020 N5110 lcd(p7,p8,p9,p10,p11,p13,p22);
00021 BMP180 bmp180(p28,p27);
00022 Serial serial(USBTX,USBRX);// The tool which sets the date
00023 
00024 /**
00025 add up one integer variable
00026 @param setTimerFlag - integer to add
00027 creat two functions
00028 @param serialISR - function to add
00029 @param setTime - function to add
00030 */
00031 void serialISR();// ISR that is called when serial data is received
00032 void setTime();// function to set the UNIX time
00033 int setTimerFlag = 0;// flag for ISR
00034 
00035 char rxString[16];// buffer to store received string
00036 
00037 
00038 /**
00039 @Boot Screen
00040 Sset Brightness
00041 @Set date
00042 @Connect LCD and sensor to micro-controller
00043 @Display temperature and pressure
00044 */
00045 
00046 int main()
00047 {
00048 
00049     lcd.init();
00050     //Boot Screen
00051     lcd.printString("Project-D",2,1);//First line and coordinate
00052     lcd.printString("Weather",2,2);//Second line and coordinate
00053     lcd.printString("station",2,3);//Third line and coordinate
00054     wait(2.0);//Wait 2 secs and turn into next interface
00055     lcd.clear();//Clear
00056     lcd.setBrightness(0.1);//Screen Brightness
00057     bmp180.init();
00058     Measurement measurement;
00059     //RTC
00060     serial.attach(&serialISR);//Set the time
00061     char t[30];//array to t
00062     while(1) {
00063         time_t seconds = time(NULL);
00064 
00065         strftime(t, 30 , "%X %D",localtime(&seconds));//The form of date
00066 
00067         serial.printf("Time = %s\n" ,t);// The form of date displaying on the screen
00068         lcd.printString(t,0,5);//The coordinate of date
00069         wait(1.0);
00070         if(setTimerFlag) // if updated time has been sent
00071         {
00072             setTimerFlag = 0;// clear flag
00073             setTime(); // update time
00074 
00075         }
00076 
00077 
00078         measurement = bmp180.readValues();// The values received by BMP180
00079         char buffer[14];//array for buffer
00080         int length = sprintf(buffer,"T= %.2f C",measurement.temperature);//Thr form of values of temperature
00081         if(length<=14)//If less than 14 words a line
00082             lcd.printString(buffer,0,1); // The coordinate of date
00083         char buffer2[14];//14 words a line
00084         length =sprintf(buffer2,"P = %.2f mb",measurement.pressure);//The form of values of pressure
00085         if(length<=14)//If less than 14 words a line
00086             lcd.printString(buffer2,0,2); //The coordinate of values
00087         wait(1.0);//wait 1 sec
00088     }
00089 
00090 
00091 
00092 }
00093 
00094 /**
00095 add up one integer variable
00096 @setTime - print it for debugging
00097 @timeflag - read rx string into buffer
00098 @param time - integer to add
00099 @atoi - update the time
00100 */
00101 
00102 void setTime()// print time for debugging
00103 {
00104     serial.printf("set_time - %s",rxString);// atoi() converts a string to an integer
00105 
00106     int time = atoi(rxString);// update the time
00107 
00108     set_time(time);
00109 }
00110 
00111 void serialISR()
00112 {
00113     // when a serial interrupt occurs, read rx string into buffer
00114     serial.gets(rxString,16);
00115     // set flag
00116     setTimerFlag = 1;
00117 }
00118 
00119 
00120 
00121 
00122 
00123 
00124 
00125