Error in Two long variable Passing in Funciton to Pointer

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Read-Only Author Niraj Patel Posted 6-Jan-2006 12:27 GMT Toolset C51	Error in Two long variable Passing in Funciton to Pointer Niraj Patel Hi, I am using Function to Pointer. i have definded this functin poiter in one structure with two long variable argument. it is giving me error below. Error C212: indirect call: parameters do not fit within registers. though it is given in c51.pdf that it will pass funciton argument with two long variable, i face this error. expecting solution as soon as possible code is like this typedef struct { unsigned long var1; unsigned long var2; void (*funptr) (unsigned long var1,unsigned long var2); }test; void main() { struct test *pt,t; t.vars1 = 6550; t.vars2 = 6551; t.funptr = TESTING; // where TESTING is fucntion definition macro pt->funptr(pt->var1,pt->var2); // here i get error listed above } thanks niraj
Read-Only Author Andy Neil Posted 6-Jan-2006 14:11 GMT Toolset C51	Could've found with just a 'Search'... Andy Neil "I am using Function to Pointer" Due to the nature of the 8051 architecture, C51 has some limitations using function pointers. You need to read the following very carefully: http://www.keil.com/appnotes/docs/apnt_129.asp http://www.keil.com/support/docs/2066.htm http://www.keil.com/support/docs/210.htm http://www.keil.com/support/docs/806.htm
Read-Only Author Hongbing Shen Posted 8-Jan-2006 07:15 GMT Toolset C51	RE: Error in Two long variable Passing in Funciton to Pointer Hongbing Shen Try this: typedef struct { unsigned long var1; unsigned long var2; void (*funptr) (unsigned long xdata* var1,unsigned long xdata* var2); }test; void TESTING(unsigned long xdata * var1,unsigned long xdata * var2) { unsigned long tmp; tmp=*var1; *var1=*var2; *var2=tmp; } void main() { xdata test t; t.var1 = 6550; t.var2 = 6551; t.funptr = TESTING; t.funptr(&t.var1,&t.var2); }
Read-Only Author Dharmesh Shah Posted 12-Jan-2006 04:04 GMT Toolset C51	RE: Error in Two long variable Passing in Funciton to Pointer Dharmesh Shah Hi dear Dharmesh you solution is working nice for keil again one another solution i found is to pass structure pointer in that pointer to function. so that i can use my code for keil and another compiler also like VC++ typedef struct { unsigned long aa; unsigned long bb; void (*funptr) (test *ts); }test; void TESTING(test *ts) { unsigned long var1,var2; unsigned long tmp; var1 = ts->aa; var2 = ts->bb; tmp=var1; var1=var2; var2=tmp; } void main() { test t; t.aa = 6550; t.bb = 6551; t.funptr = TESTING; t.funptr(&t); }

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