using .init1 section with gcc

Sep 25, 2003 1 Replies
M

Hello.



I am using avr-gcc 3.0.2. I know its quite old, but switching to a newer WinAVR-Version is a bit of work, because of all the depracated header and so on.. and I am under pressure because of the deadline...



My Problem: I am working on an ATMega103 with 8K external RAM installed. I want to enable the RAM-Interface with:



void init_xram (void) __attribute__ ((naked)) \ __attribute__ ((section (".init1")));



void init_xram (void) { sbi(MCUCR, SRE); // this enables the external RAM interface }



But the linker ist bugging me with that answer:



secion .init1 [00009314 -> 00009323] overlaps section .data [00009314



-> 0000a19f]



How could this happen?



Is it ok, to place the function xram_init in the .c-file where the main() is?



I have already posted this in the avrfreaks.net forum, but no one has an idea for a solution. If anyone knows a possible reason, please answer me. I have to fix this as soon as posible...



Thanks in advance.


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T

The problem lies in the linker script. It seems that it's not prepared to handle the section (.init1).

Another thing is that your start-up code is very probably also not prepared to handle the section very early in the start-up, as you seem to like it be.

IMHO, the easiest way is to edit the start-up module to include the sbi instruction, if you're not willing to go the safer path of upgrading your toolset.

HTH

Tauno Voipio tauno voipio @ iki fi

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