I noticed some registers aren't defined in SDCC (e.g. CONFIG1L at 0x3000000, CONFIG2L at 0x300002, ...etc...).
Does anyone know what the best way to reference a memory address would be so I can change these registry values?
I image this is a fairly simple task. I figure pointers would be handy.
Here's what I've got:
#define CONFIG1L (volatile unsigned char *)(0x3000000) //set location of register
CONFIG1L = 0x00; //set content at register to zero
Here's what I get:
error 10: 'lvalue' required for 'assignment' operation.
Thanks in advance
Allthough I don't know much about the pic's, your method is definately wrong. You define CONFIG1L as a pointer and then try to assign a value to it. Shouldn't you instead assign to the pointed object? So either use:
#define CONFIG1L *(volatile unsigned char *)(0x3000000)
CONFIG1L = 0x00;
#define CONFIG1L (volatile unsigned char *)(0x3000000)
*CONFIG1L = 0x00;
Thanks for the reply
I realized shortly after my post that I wasn't de-referencing the pointer (like you demonstrated). However, I am still unable to successfully read/write to a defined address
Has anyone else come across this issue or have any other methods of accessing specific memory addresses?