How to share some ram bytes between bootloader and user app

[SergioMForster]

I have developed a user App(in general segment flash) and a bootloader (in auxiliary flash memory) that works well

Compiler PCD v5.085 Processor PIC24EP512GP806

After a reset, the first one that runs is the bootloader (#fuses RESET_AUX), which according to the conditions, passes the control to the user APP, using the

[asmallri]

[SergioMForster]

Thanks for your answer.

Unfortunately, in my user app, restart_cause always responds 16 (unknown).

CCS recommends using restart_cause immediately at the beginning of the main:

value = restart_cause()

Function:
Returns the cause of the last processor reset.
[PCD] In order for the result to be accurate, it should be called immediately in main().


After going through all the bootloader logic, the cause of the reset is lost, it does not reach the user app.

For this reason, I want to pass it from the bootloader to the user App, using a shared RAM byte.

[asmallri]

I was suggesting you interrogate the PIC register directly, not use the CCS function.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

[temtronic]

OK, maybe I'm totally wrong, but wouldn't a 'global' variable work ??
My mind's in a fog cause I'm fighting TWO levels of goverment...

[asmallri]