5 years, 6 months ago.

Sd card library is creating problem in program. Cant see anything on LCD if add sdfile system code.

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#include "mbed.h"
#include "TextLCD.h"
#include "SDFileSystem.h"

FileSystem sd(D9, D10, D12, D13, "sd");
TextLCD lcd(A0, A1, A2, A3, A4, A5);
DigitalOut switchengine(LED2);
DigitalIn pin_up(D6); 
DigitalIn pin_down(D7);
InterruptIn pin_start(D8);
DigitalIn pin_delay(D11);
InterruptIn Pin_rain(PC_13);

Timer timer;   
int Quarters;    
void displayUpdate();
void startRun() ;
void callstart();
void timerf();
void pumpoff();
bool status ;
float delay;
int i;
int d;
int s;
int m;
float reverse;
float h;
float time;
int begin;
void rainsense();
time_t seconds = time(NULL);
//called when 15min has passed

void pumpoff(){
  switchengine=0;
    status = true;
   //update display
   lcd.cls();
   lcd.locate(3,0);
   lcd.printf("PUMP OFF!");
     lcd.locate(0,1);
    lcd.printf("Ran T:%1.2f Hr",i*0.25);
    
    pin_start.rise(&timerf);
   pin_start.fall(&callstart);   
        Pin_rain.rise(&rainsense); 
 
 }
 void rainsense(){
    switchengine=0;
     lcd.cls();
   lcd.locate(0,0);
   lcd.printf("%s",ctime(&seconds));
   if(h<1.1){
        lcd.locate(0,1);
lcd.printf("Ran T:%1.2f Hr ",m);
       }
       else{
   lcd.locate(0,1);
lcd.printf("Ran T:%1.2f Hr ",h);}

   FILE *file = fopen("/local/rainstamp.txt", "a");
     if(file == NULL) {
        fprintf(file, "Could not open file for write\r\n");
    }
    else{
     fprintf(file, " \r set time- rantime-%1.2f,Rain time- %s,\n", h , ctime(&seconds));
fclose(file); 
}

while(1){
     switchengine=0;
     }
}
     
 void timerf(){
     timer.start();
 begin = timer.read();
 }
 
 void callstart(){
          int end = timer.read();
          timer.stop();
          int t = end - begin;
          
     if(status==true ){
          if(t==2){
            startRun();
  timer.reset();
  }
  } 
    }
void displayUpdate(){
    //engine should be running
 
    if (i==0){
     pumpoff();
        }
  else{
       switchengine=1;
 
    if(i<4){
                  m = i*2;
                 s = 60;
                  while(m > 0){
              lcd.cls();
              lcd.locate(3,0);
       lcd.printf("Time= %d min ",i*2);
       lcd.locate(2,1);
       lcd.printf(" %d min %d",m-1, s);
       wait(1);
       s--;
       if(s==0){
           m--;
           s = 60;}
           if(m==0){
         pumpoff();}
           
          Pin_rain.rise(&rainsense); 
               }
               }
               
                  else{
                       s = 60;
                       h = i*0.25;
                       
                      while(h > 0){
                          
                          if(h<1.1){
                lcd.cls();
              lcd.locate(1,0);
       lcd.printf("Time= %1.2f Hr ",i*0.25);
       lcd.locate(2,1);
       lcd.printf(" %1.1f min  %d",(h-0.01)*100, s); 
                              }
              else{
                  lcd.cls();
              lcd.locate(1,0);
       lcd.printf("Time =%1.2f Hr ",i*0.25);
       lcd.locate(2,1);
       lcd.printf(" %1.2f Hr  %d",h-0.01, s);
       }
       wait(1);
       s--;
       if(s==0){
           h= h-0.01;
           reverse = reverse+0.01;
           s = 60;}
           if(h==0){
             pumpoff();}
               
               Pin_rain.rise(&rainsense); 
               }    
                
     }
}
}
        
//update the display and start/stop the engine
 
// init and start the run
 void startRun() {
     
 status = false;
 lcd.cls();
 lcd.locate(3,0);
 lcd.printf("PUMP START");
 wait(1);
 lcd.cls();
 displayUpdate();
}
 
int main() 
{
 
  pin_up.mode(PullDown);
  pin_down.mode(PullDown);
  pin_start.mode(PullDown);
  pin_delay.mode(PullDown);

 //mkdir("/sd/mydir", 0777);
  set_time(1458986114);
  
  if(reverse < (i*0.25)){
     
     lcd.locate(0,1);
    lcd.printf("Ran T:%1.2f Hr",reverse);
     }
  if(switchengine==0){
            lcd.cls();
        lcd.locate(5,0);
        lcd.printf("READY");
        wait(1);
            }
            
            
             lcd.cls();
        lcd.locate(3,0);
        lcd.printf("SET TIME");
            
        
             do{
                 while(pin_delay == 1){
        d++;
        lcd.cls();
        lcd.locate(0,0);
        lcd.printf("DELAY = %d mn", d);
        wait(0.8);
                          
   }  
          if(pin_up==1)
           {i= i++;
           wait(0.1);
           if (i>200)
            i=200;
            tim = i;
            if(i<4){
             lcd.cls();
             lcd.locate(1,0);
             lcd.printf("Time= %1.2f mn", tim*15);
           
                          }
             else{
                 lcd.cls();
                 lcd.locate(1,0);
             lcd.printf("Time= %1.2f Hr", tim*15/60);
             
           }
            }
                 else if(pin_down==1){
                     i=i--;
                     wait(0.1);
                     if( i<0)
                     i=0;
                     tim = i;
                     if(i<4){
                         lcd.cls();
                         lcd.locate(1,0);
             lcd.printf("Time= %1.2f mn", tim*15);
             }
              else{      
              lcd.cls();
              lcd.locate(1,0);
              lcd.printf("Time= %1.2f Hr",tim*15/60);
              
                     }
                     }
                     } while(pin_start==0);

if(i==0){
  while(1){
  lcd.cls();
 lcd.locate(3,0);
  lcd.printf("Error!!!");
  lcd.locate(1,1);
  lcd.printf("Time not set");
  wait(3);
  }
  }
  
  tim = Quarters; //Initial selected number of quarters 
    
    if(d==0)
    {
    startRun() ;  
    }
else
{
              
              int sec = 60;
              int min = d*15;
              
              if(d<4){
                  while(min>0){
              lcd.cls();
       lcd.locate(1,0);
       lcd.printf("Wait =%d min %d",min-1, sec);
       wait(1);
       sec--;
       if(sec==0){
           min--;
           sec = 60;}
           if(min==0){
           d=0;}
           Pin_rain.rise(&rainsense); 
               }
               }
                  else{
                       int sec = 60;
              float hr = d*0.25;
                      while(hr>0){
              lcd.cls();
       lcd.locate(0,0);
       lcd.printf("Wait= %1.2f Hr %d",hr-0.01, sec);
       wait(1);
       sec--;
       if(sec==0){
           hr= hr-0.01;
           sec = 60;}
           if(hr==0){
               d = 0;}
               Pin_rain.rise(&rainsense); 
               }         
     }
      startRun(); 
    }
      
                  // call to (re)start engine run)&& status == true if(runtimeleft == 0 )
    while(1);       // just wait for keypress
   
    }

Question relating to:

Affordable and flexible platform to ease prototyping using a STM32L152RET6 microcontroller.

1) Use the format option in the compiler.

2)

   FILE *file = fopen("/local/rainstamp.txt", "a");
   if(file == NULL) {
      fprintf(file, "Could not open file for write\r\n");
    }

????????? You check if the file pointer is invalid and then try to use it anyway? If you are getting a null pointer that's going to cause a crash.

posted by Andy A 08 Jun 2016

Do you mean to say if I am running the program in the controller without SDcard breakout board, just for test, the whole program wont work? because I was running program just to test without connecting any sdcard.

posted by jayendra mishra 08 Jun 2016
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Assigned to Simon Ford 5 years, 5 months ago.

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