main.cpp

00001 #include "mbed.h"
00002 #include "SLCD.h"
00003 
00004 
00005 #define PROGNAME "lightsense_kl46z_PWM v1\n\r"
00006 #define DATATIME 400 // milliseconds
00007 #define LCDLEN 10
00008 #define LIGHTSENSORPORT PTE22
00009 
00010 SLCD slcd; //define LCD display globally define
00011 Serial pc(USBTX, USBRX);
00012 Timer LEDTimer;
00013 
00014 void LCDMess(char *lMess){
00015         slcd.Home();
00016         slcd.clear();
00017         slcd.printf(lMess);
00018         
00019         slcd.DP(0, false);  //Disables the decimal point in position 0
00020 } 
00021 
00022 int main() {
00023     PwmOut greenColor(LED_GREEN);
00024     PwmOut redColor(LED_RED);
00025     AnalogIn LightSensor(LIGHTSENSORPORT);
00026     float lightData; 
00027     char lcdData[LCDLEN];
00028    
00029     int timeToChangeDF = DATATIME;
00030     // set up timer for next step of Duty Factor timing
00031     LEDTimer.start();
00032     LEDTimer.reset();
00033     pc.printf(PROGNAME);
00034     
00035     
00036     while(true) {    
00037         if (LEDTimer.read_ms() > timeToChangeDF){ // check for timer time out transtion
00038             lightData = (1.0 - LightSensor.read()) * 100; // show as increasiing with increasing intensity
00039             greenColor.write(1.0 - lightData);
00040             redColor.write(1.0 - lightData);
00041             sprintf(lcdData,"%4.3f",lightData);
00042             LCDMess(lcdData);  
00043             pc.printf("%4.3f\r\n",lightData);
00044             timeToChangeDF = DATATIME;
00045             LEDTimer.reset();
00046         }        
00047     }// end while
00048 }