[avr-chat] SFRs in assembly code

[Daniel Otte]

Hi all,
I'm having problems assembling the following code:
[...]
19    #include "config.h"
20    #include <avr/io.h>
21
22    .global uart0_init
23    uart0_init:
24    #define BAUD UART0_BAUD_RATE
25    #include <util/setbaud.h>         
26      ldi r24, UBRRH_VALUE
27    #if _SFR_IO_REG_P(UBRRH0)
28      out _SFR_IO_ADDR(UBRRH0), r24
29    #else
30      sts _SFR_MEM_ADDR(UBRRH0), r24
31    #endif
[...]

The Errors I get are:
avr-gcc -mmcu=atmega644   -c -o uart_ni-asm.o uart_ni-asm.S
uart_ni-asm.S: Assembler messages:
uart_ni-asm.S:28: Error: constant value required
uart_ni-asm.S:28: Error: number must be positive and less than 64

I've read http://www.nongnu.org/avr-libc/user-manual/group__avr__sfr__notes.html
but it seems to not offer a solution.

Thanks for your help in advance,
  Daniel

signature.asc
Description: OpenPGP digital signature