Hi,
I recently installed the 20120716 release (following the instructions in
the readme and wiki). The installation seems fine as I can compile and
correctly run the my code from v4.6.
My chip is msp430f5438a on the experimenter board.
I would like to put a lookup table in the far memory region. I was testing
some simple code using the __far__ attribute, but the code seems to be
getting placed in the near region. I'm sure I'm missing something silly.
Can somebody please help. (Note: The code is not mean to produce anything
meaningful. I simply need to see if the memory assignment is happening
correctly, for which I am using msp430-objdump
My sample code
#include <stdio.h>
#include "sj.h"
/* contains an initialized array declared as
const char kuttest[30000] __attribute__((__far__)) =
{ 1, \
2, \
2, \
2, \
2, \
2, \
...
};
int putchar(int c) {return 0;}
void main() {
int res;
const char * __attribute__((__a20__)) abc = kuttest;
for(res = 0; res < 10; res++)
printf("%x abc", *(abc+res));
}
I am compiling this will the most conservative options
msp430-gcc-4.7.0 -mmcu=msp430f5438a -md20 -msr20 -mdata-region=far -mc20
-mcode-region=far fardata.c -Wall -o fardata
The code compiles fine (with the warning about main return type not being
int).
The objectdump shows me
Disassembly of section .rodata:
000066d6 <kuttest>:
66d6: 01 02 mova #4, r1 ;r2 As==10
66d8: 02 02 mova #4, r2 ;r2 As==10
66da: 02 02 mova #4, r2 ;r2 As==10
66dc: 02 02 mova #4, r2 ;r2 As==10
66de: 02 02 mova #4, r2 ;r2 As==10
66e0: 02 02 mova #4, r2 ;r2 As==10
66e2: 02 02 mova #4, r2 ;r2 As==10
66e4: 02 02 mova #4, r2 ;r2 As==10
The variable is not in the far address space.
Any help is appreciated.
Thanks a lot
Shalabh
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