[avr-gcc-list] AT90CAN128 Bootloader

[Jonathan Goldberg]

Hello,

I am having some issues with the avr-libc bootloader for the 
AT90CAN128.  I am following the bootloader example in the avr-libc 
documentation pretty much verbatim.  When I try to write the flash 
memory, it seems the addressing is offset by 0x10000.  In other words, 
if I write to starting address 0x0000, the data actually gets programmed 
to starting address 0x10000.

avr-libc version is 1.4.3.

Here is a code snippet:

uint32_t mem_ptr;
uint16_t word;
uint16_t len;  /* this will be 256 */
uint16_t i;

...

/* make sure mem_ptr is okay */
mem_ptr &= 0xFFFFUL;
/* ensure the page is erased */
eeprom_busy_wait ();
boot_page_erase (mem_ptr);
boot_spm_busy_wait ();
/* determine the length */
if (pmsg->dlc > 8) {
   len = pmsg->dlc;
} else {
   len = pmsg->data[0];
}
/* fill the flash data page */
for (i=0; i<len; i+=2) {
   word = pmsg->data_ptr[i];
   word |= (uint16_t)pmsg->data_ptr[i+1] << 8;
   boot_page_fill (mem_ptr+i, word);
}
/* program the page */
boot_page_write (mem_ptr);
boot_spm_busy_wait ();
boot_rww_enable ();

Thanks for the help,
Jonathan

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