Sorry,
I forgot to the most important definition
in the specification :
7. I need to update the application
section (RWW) + (NRWW) excluding the boot loader section
(this probably means that the interrupt
vector table in the boot section must be replicated in the high end part of the
application (NRWW section).
Due to the fact that I can not ch’ange
the vector jump table in the boot section I propably have to have an added
interrupt ventor jump teable
In the application NRWW section at a
fixed start address, hose jumps change depending on the new addresses of the
ISRs in the application section.
Please, see the diagram below :
Da: Carlo Ossanna
[mailto:address@hidden
Inviato: giovedì 29 aprile 2010
17.04
A: '
Oggetto: need help on avr-libv and
winavr
Hello,
I am using winavr 20100110 on an atmega128 and I need to do
the following :
- put the interrupt vector table
(including reset vector) to the base address of the boot loader section (i
can define that base value with fuses)
- The Boot section brings control
after reset
- have my application code
starting at 0x0000 launched after reset by the boot loader section
- allocate all the application
ISR functions starting at the base address of the RWW section.
- All these ISRs must be linked
to the interrupt vetor table at point 1.
- Allocate some code to update
the internal flash in RWW section and call it from the application section
The reason of my request is to be able to execute code
called from the application section to write the internal flash memory having
all the interruptus working during flash update.
Do you think this is possibile using avr-libc and winavr ?
Could you help me ?
Thanks for your kimd attention,
Best regards,
Carlo Ossanna
Italy