Hi, this question is suitable to micro controller programming. I have a function and fix its location at some particular address in linker file. Now i want to execute this function on particular condition. How to do it? I am thinking of using function pointers like
Can i assign an address to this fctptr same as the address of the function in linker file like fctptr = (void *)8000.Code:Void (*fctptr) (void).
Any help? This is the typical application of bootloader.
Given this
void (*fctptr) (void);
You call it with
fctptr();
> Can i assign an address to this fctptr same as the address of the function in linker file like fctptr = (void *)8000.
Yeah, you should be able to.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
my confusion is if i a pointer is pointing to unsigned char like
then we type cast it to unsigned char and assign to p like for exampleCode:unsigned char *p;
but in the case of function pointers how should i type cast like for exampeCode:p = (unsigned char *)0x100;
and if i am trying to assign any address how should i typecast? can i do simply as below?Code:int (*fptr)(int);
For everything can i simply use (void *)?Code:fptr = (void *)1000;
A function pointer cast looks like this.
Code:#include <stdio.h> int main ( ) { int (*fp)(void); fp = (int(*)(void))100; if ( fp() ) { } return 0; }
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Now i Understand, Thanks.
