main.cpp

00001 #include "mbed.h"
00002 #include "TextLCD.h"
00003 #include "string"
00004 //#include "MSCFileSystem.h"
00005 
00006 TextLCD lcd(p15, p16, p10, p11, p12, p13); // rs, e, d4-d7 ;LCD configuration
00007 
00008 LocalFileSystem fs("fs");
00009 
00010 AnalogOut   aout(p18);                                      //DAC
00011 AnalogIn    ain(p17);                                       //ADC current read
00012 DigitalIn   pb(p9);                                         //Switch
00013 DigitalOut  dout(LED1);                             
00014 DigitalOut  trig(p5);                                       //
00015 DigitalOut  trigstop(p6);                                   //
00016 DigitalOut  trigstart(p7);                                  //
00017 int pbb;
00018 
00019 float mini = 0.1f,maxi = 1.2f,stepsize = 0.005f,highV=0,highC=0,readd;
00020 float pulsedur=0.5,step,sample,width=0.25,current,pulseamplitude=0.1;
00021 
00022 void lcdprintnum(float number);
00023 
00024 int main() {
00025     lcd.cls();
00026     pb.mode(PullDown);
00027     
00028     while(1){
00029         pbb=pb;
00030         trig=0;
00031         trigstop=0;
00032         lcd.locate(0,0);  
00033         lcd.printf("DEVICE READY...");
00034         
00035         if(pbb==1){
00036             FILE *fp = fopen("/fs/test.csv","w");
00037         
00038             lcd.cls();
00039             wait(0.1);
00040         
00041             lcd.locate(0,0);  
00042             lcd.printf("ScanRate:0.01V/s ");
00043                 
00044                 
00045             for(float i = (mini/3.3); i < (maxi/3.3); i += (stepsize/3.3f)) {
00046                 aout=(i - (pulseamplitude/3.3));    
00047                 trigstart=1;
00048                 trigstart=0;
00049                 trig=0; 
00050                 wait(pulsedur-width);                                      //base voltage duration, sample 1 here
00051                 
00052                 if(i>=1.19/3.3){
00053                     trigstop=1;        
00054                 } 
00055                 
00056                 aout=i;                                           //pulse voltage 
00057                 lcd.locate(0,1); 
00058                 lcdprintnum(aout.read()*3.3);
00059                 lcd.printf(" V");
00060                 trigstart=1;
00061                 trigstart=0;
00062                 trig=1;
00063                 wait(width);     
00064                 
00065            //     readd=3.3f*aout.read();
00066                 
00067             //    if(readd>highC){
00068             //        highC=readd;          
00069             //    }
00070                           
00071                 
00072                                               //high pulse duration ; pulse = i
00073             }
00074             aout=0;  
00075             lcd.cls();   
00076             lcdprintnum(readd);
00077             
00078             wait(2);
00079             
00080         }
00081     }
00082 }
00083 
00084 void lcdprintnum(float number){                     //to display number on lcd
00085     char aoutstring[10];  
00086     sprintf(aoutstring,"%.4f",(number));          //convert from float to string to display
00087     lcd.printf(aoutstring);           
00088 }
00089