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Problem with assigning the address of a function to a LIB-variable

I have written a LIB with the following decleration:

  idata u_char clock_occ;
  idata void (*f_ce)(u_char stat);

I use it in the LIB in the way as:

  clock_occ = 1;
  f_ce(TRUE);

so far, no problem, I compile it -> ok:

I add the LIB to my project and use it like:
 
  extern idata u_char clock_occ;
  extern idata void (*f_ce)(u_char stat);

  void SetChipEnable (u_char stat)
  { ... }

  void main (void)
  {
    clock_occ=0;
    f_ce = (void *)SetChipEnable;
  }

-> now I get at the use of "clock_occ" no error, but at the use of "f_ce" I get the warning "1" + "2" (unresolved ex. sym.)

Why?

Many thank's for help.

Norbert Christof

Parents

0 norbert christof over 23 years ago in reply to Jon Young

Thanks. I have made this solution:

In my "lib"


defTyp idata void (code*f_ce_on)();  
defTyp idata void (code*f_ce_off)();  


void InitClockLib (u_char *p_ce_on, u_char *p_ce_off)
{
	f_ce_on = p_ce_on;
	f_ce_off = p_ce_off;
}

.... in a function of the "lib"

  	MCO = 1;
        f_ce_on();

the using code:


void SetChipEnableOn (void)
{
  P2 = 0xFF;
}

void SetChipEnableOff (void)
{
 P2 = 0;				
}

... and


InitClockLib ( (u_char*) &SetChipEnableOn, (u_char*) &SetChipEnableOff);

In the Overlay ... I have to write

Read ! (SetChipEnableOn, SetUhrChipEnableOff),
Write ! (SetChipEnableOn, SetUhrChipEnableOff)

Thank for your Help

Norbert

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