[avr-gcc-list] ATmega64 boot code blues

[Richard Ziemerink]

Hi,
 
I am trying to write a bootloader for the ATmega64 using avrgcc.  As a
small test to see if I could change the program memory I tried out the
following code:
[code]
 
#include <avr/interrupt.h>
#include <avr/boot.h>
#include <avr/io.h>
 
int main(void)
{
 #define ADDRESS     0x1000UL
 
   // debug pin
    DDRE =  0xff;
    PORTE = 0xff;
 
 // Erase page.
    boot_page_erase((unsigned long)ADDRESS);
    while(boot_rww_busy())
    {
        boot_rww_enable();
    }
 
    // Write data to buffer a word at a time. Note incrementing address
    // by 2. SPM_PAGESIZE is defined in the microprocessor IO header
file.
    for(unsigned long n = 0; n < SPM_PAGESIZE; n += 2)
    {
        boot_page_fill(ADDRESS + n, n);
    }
 
    // Write page.
    boot_page_write((unsigned long)ADDRESS);
    while(boot_rww_busy())
    {
        boot_rww_enable();
    }
    
 for(;;)
 {
    PORTE  ^= 0xff;
 }
 
 return 0;
}[/code]
 
The code is located at address 0x7C00, and the following values have
been set
 
BOOTSZ = 01
BOOTST =  0
No lock bits have been set.
 
I have verfied that the program  is running by looking at the toggling
of PORTE.
 
I would expect the program memory to change, but when I read the memory
back via the ISP port all memory values except the values where  the
booloader is located  equals 0xff..
 
Could anybody please point out what I am doing wrong here?  I  have run
out of ideas and would appreciate some input.
 
Thanks,
Richard