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I am in need of some assistance

Discussion in 'C' started by boschow, May 28, 2007.

  1. boschow

    boschow New Member

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    Hi guys,
    i recieved a code from an old programer, the part of the code looks like this:
    Code:
    void set_PID_i_factor(UINT8 PID_number,UINT16 timeMS)
    {
        UINT8 vrsta = PID_number;
        UINT16 barka;
        UINT32 temp_i = (UINT32)izpisi16(nvvar,set_PID_p_factor(PID_number)) * timeMS; /[COLOR="Red"]/ what does this part of the code do ? i dont get it . . . [/COLOR] :(
        switch(PID_number){
          case 0:
              barka = aGS_RTKC_I_WP;
              break;
          case 1:
              barka = aGS_RTKH_I_WP;
              break;
          case 2:
              barka = aGS_RTPK_I_WP;
              break;
          case 3:
              barka = aGS_RTPF_I_WP;
              break;
          case 4:
              barka = aGS_RTPC_I_WP;
              break;
          case 5:
              barka = aGS_RTPH_I_WP;
              break;
        }
    
        barka = izpisi16(nvvar,barka); // // [COLOR="Red"]what does this part of the code do ? i dont get it . . .[/COLOR]  :(
        if(!barka) pid_data[vrsta].i_fact = 0;
        else {
            temp_i = temp_i * 256 /barka;
            pid_data[vrsta].i_fact = temp_i; // /10;
        }
    }
    
    I understood that barke is equal to parameter_I_value and that vrsta is equal to PID_number. I dont understand why he delared vrsta and then set the value of vrsta with the value that has PID_number. Isnt it easyer to use just PID_number?

    Thanks for your help,
    best regards,
    BoSCHoW.
     

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