COMport C++ problem

[Pačo]

Hello,

could anyone please help me with this.
I have a hardware connected to my PC via serial port. This hardware is sending me data (in HEX format). Now i would like this data save to a .txt file. Please help me.

Here is my code so far...if anybody is willing to help, please change the colour of your code :)
P.S.: It is written in Slovene (hope there won't be any problems)

------------------------------------------

#include <windows.h>
#include <stdio.h>
#include "ComPort.h"

char _tmp_buffer[256];

const char* ByteToString(char c) {
    for(int i=0;i<8;i++) {
        if((c>>i)&1) _tmp_buffer[7-i]='1';
        else _tmp_buffer[7-i]='0';
    }
    _tmp_buffer[8]=0;
    return _tmp_buffer;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {
    AllocConsole();
    printf("Program se zaganja.\n");
    
    
    ComPort Vrata("COM5", 2400, 8, false, 1);
    
    
    char znak;
    int stevec;
    stevec = 0;
    unsigned int a,b;
    unsigned int c1,c2;
    int c=0;
    int kanal;
   

        znak = 0;
        
        while (znak < 0x7F)
        {
        Vrata.GetCharacter(znak);
        }
        stevec++;
        kanal = 1;
        a=znak;
        while (stevec<200)
        {
        Vrata.GetCharacter(znak);
        b=znak;
        stevec++;
        
        
        c = b & 127;
        for(int i=0; i< 5 ; i++)
            {
                if((a >> i) & 1)
                {
                    c = c | (1 << 7+i);    
                } 
            }
            c1 = c / 256;
            c2 = c & 255;     

            printf("Rezultat: A:%x(%s)", a, ByteToString(a)); 
            printf("  -  B:%x(%s)\n", b, ByteToString(b));
            printf("Odkodiranje: C1:%x(%s)", c1, ByteToString(c1));
            printf("  -  C2:%x(%s) Kanal: %d\n", c2, ByteToString(c2), kanal);   

            
        Vrata.GetCharacter(znak);
        a=znak;
        stevec++;
        if (znak<0xC0)
        {
             kanal++;
        }
        else 
             kanal = 1;
       
}

        if(Vrata.GetCharacter(znak)) 
        {

            Vrata.SendCharacter(a);
            Vrata.SendCharacter(b);
            Vrata.SendCharacter(c1);            
            Vrata.SendCharacter(c2);
        }


    printf("Program se koncuje.\n");
    system("pause");
    FreeConsole();
    return 0;
}

[Ancient Dragon]

>> Now i would like this data save to a .txt file.
Just use normal file i/o. If you wrote the code you posted then that should not be a problem for you. On the otherhand if you didn't write it then see fopen(), fprintf() and fclose() functions.

[Pačo]

Hmmm...I was thinking sth in this way

/* fopen example */
#include <stdio.h>
int main ()
{
  FILE * pFile;
  pFile = fopen ("myfile.txt","w");
  if (pFile!=NULL)
  {
    fputs ("fopen example",pFile);
    fclose (pFile);
  }
  return 0;
}

Problem is...there is no fprintf() :S?
And I don't know where to insert it :S

[Nick Evan]

{
FILE * pFile;
pFile = fopen ("myfile.txt","w");
if (pFile!=NULL)
{
fputs ("fopen example",pFile);
fclose (pFile);
}
return 0;
}

Problem is...there is no fprintf() :S?
And I don't know where to insert it :S

Look for what fprintf is suppose to do. If you do, you will see that this example uses fputs instead. (Not a very good idea)
Since I'm in a good mood: Here's a link with an example using fprintf.

Niek

[ithelp]

You have to interpret the data arriving at com port and then write them back to file, writing directly might give garbage value.

[Pačo]

You have to interpret the data arriving at com port and then write them back to file.

Ok, and how do I do that? (I'm a nOOb in programming:icon_cry: )