Question

Last week I had an interview. I was asked to write a macro to read a memory location (say 0x2000).
I wrote the code in normal programming, but I could not write the macro.
Please help me figure out how to write the macro for the code below:

char *address = (char*)0x2000; // address is a pointer to address 3000 char val

*address = 36; // write 36 to 8 bit location at address

val = *address; // read 8 bit value from address

Answer 1

Something like this?

#define READ_CHAR_AT(address) *((char *) (address))