S12 / MagniV MicrocontrollersのトピックRe: Multiplication Problem in Xgate.

Multiplication Problem in Xgate.

Nycil — Wed, 20 Oct 2010 13:58:52 GMT

I am currently facing a multiplication problem in my Xgate ISR routine. In one of the PIT interrupts , I have written a statement for multiplyiing a variable and #define. The Problem now is , the value is not getting updated correctly.

eg:My ISR routine which calls a function FadeOut() - its defined below

#define CLOCK_MHZ 50 ( done in Xgate.h)

interrupt void Xgate_PIT3(void) {
    static unsigned char count1s =0;

     p_D_PITTF.p_S_Bits_t.ptf3_u1 = 1;
    if(count1s >= 60) {

      p_D_PITCE.p_S_Bits_t.pce3_u1= 0;
      p_D_PITINTE.p_S_Bits_t.pinte3_u1= 0;
      FadeOut();
    }
    else{
      count1s++;
    }

}

void FadeOut(){

   unsigned long MulRegVal = 0;

      MulRegVal = CLOCK_MHZ * (unsigned long)ChargingDutyCycle_u16;

      if(MulRegVal > 256){

      p_D_PITMTLD0.byte_u8 = 256-1;
          p_D_PITLD1.word_u16 = ((MulRegVal/256)-1);
       }

    else{

   p_D_PITMTLD0.byte_u8 = (MulRegVal-1);
         p_D_PITLD1.word_u16 = 0;
          }

}

say ChargingDutyCycle_u16 = 250

Here the varible MulRegVal does not get the value (50*250) ... but only 250 ...

And additionally , when the statement the executed in the TRUE TIME SIMULATOR, and stepped in one step further, it goes into a function called LMULU(). I have defined the LMULU() as

void LMULU{

}

Why is this function being called? Why is not the value being updated? When I removed the function, its gievin compilation error saying that particular function is missing.

Please Help

Thanks in Advance

Re: Multiplication Problem in Xgate.

kef — Wed, 20 Oct 2010 16:52:56 GMT

Does your project include ansi_xg*.lib library? LMULU is long*long runtime routine. You should remove LMULU from your code and add required XGATE library.

Re: Multiplication Problem in Xgate.

Nycil — Wed, 20 Oct 2010 17:00:53 GMT

Yes Kef , that could solve the problem. How should I proceed to include that library file in the project? Should I make any changes to the makefile to include the library?

Re: Multiplication Problem in Xgate.

kef — Wed, 20 Oct 2010 17:56:20 GMT

I'm using CW IDE and don't know how to modify makefile. But paths to XGATE libraries are as follows:

<CW root>\lib\xgatec\lib\ansi_xgi.lib <- no floating point support

<CW root>\lib\xgatec\lib\ansi_xg.lib <- full library, including floating point runtime

Re: Multiplication Problem in Xgate.

Nycil — Wed, 20 Oct 2010 19:02:04 GMT

Thanks Kef. I dont use CW IDE. So including the library is difficult coz I dont know how. I tried compiling the rtsxgate.cxgate along with the project and but it showed duplicate declaration with rtshc12.c. So I have run out of ideas now.

Please Help

Re: Multiplication Problem in Xgate.

kef — Wed, 20 Oct 2010 20:37:35 GMT

Duplicates for what symbols? A lot of symbols, or just those few you have defined in your code, like LMUL? If many, then maybe XGATE library is already added? If just a cople, then just remove or rename conflicting objects from your code.

Re: Multiplication Problem in Xgate.

Nycil — Thu, 21 Oct 2010 13:30:26 GMT

I included the library in the prm file and its working perfectly fine.

Thanks Kef .