I'm downloading my application to a MC9S12DP512 via the Serial Bootloader
which resides at $F000 in page $3F of the Flash memory, a protected area. My app
starts loading in the programming window at $C000 in page $3F but cannot go
beyond $F000. This limits program size to less than 12K bytes, a severe
limitation when 512K bytes of Flash are available. The load and erase routines
of the Serial Bootloader all reside in $F000 and it can load apps into the same
$3F page, so why can't the Serial Bootloader load into other pages of Flash
like $20?
HC12 Serial Bootloader Limitations
Started by ●December 28, 2009
Reply by ●December 28, 20092009-12-28
The serial bootloader I've used (which comes installed in Wytec's
boards) which came from Freescale Semiconductor loads just fine into the entire
Flash memory as long as the files are in S29 format.
And there is always using the BDM interface, which will eliminate the need for the bootloader.
Tom Almy
Tualatin, Oregon USA
Internet: t...@almy.us
Website: almy.us
On Dec 28, 2009, at 9:18 AM, ga5941 wrote:
> I'm downloading my application to a MC9S12DP512 via the Serial Bootloader which resides at $F000 in page $3F of the Flash memory, a protected area. My app starts loading in the programming window at $C000 in page $3F but cannot go beyond $F000. This limits program size to less than 12K bytes, a severe limitation when 512K bytes of Flash are available. The load and erase routines of the Serial Bootloader all reside in $F000 and it can load apps into the same $3F page, so why can't the Serial Bootloader load into other pages of Flash like $20?
>
>
And there is always using the BDM interface, which will eliminate the need for the bootloader.
Tom Almy
Tualatin, Oregon USA
Internet: t...@almy.us
Website: almy.us
On Dec 28, 2009, at 9:18 AM, ga5941 wrote:
> I'm downloading my application to a MC9S12DP512 via the Serial Bootloader which resides at $F000 in page $3F of the Flash memory, a protected area. My app starts loading in the programming window at $C000 in page $3F but cannot go beyond $F000. This limits program size to less than 12K bytes, a severe limitation when 512K bytes of Flash are available. The load and erase routines of the Serial Bootloader all reside in $F000 and it can load apps into the same $3F page, so why can't the Serial Bootloader load into other pages of Flash like $20?
>
>
