MC9S12XEQ - Running XGATE code out of paged (i.e. banked) RAM

[nimisht]

Hello,

I am currently using a MC9S12XEQ512 controller.

I'm trying to run XGATE code out of paged RAM (RAM_F8 and RAM_F9).

My linker .prm file is set up correctly, and I have used the appropriate pragmas in the XGATE ISR code to ensure that the XGATE ISR will run out of paged RAM.

However, when I link the file, I get the error message: " “L1128: Cutting value _Range beg data member from 0xF81100 to 0x1100".

On startup, I stepped through the code and noticed that the XGATE code does not get copied over correctly from FLASH to the appropriate banked/paged RAM location.

As a result of this, the XGATE vectors to an uninitialized location in RAM (0xF81100)  when an interrupt occurs, and eventually raises a software error.

Is there a way to ensure that the XGATE code can run out of paged (i.e. banked) RAM correctly?

Thanks a lot in advance.

[kef2 · Accepted solution]

Hi,

You should make sure there's -D__FAR_DATA in compiler command line setting. Look in startup.c file for what does __FAR_DATA define do.

Edward

[nimisht]

Thanks! That did the trick :smileyhappy: