s12zvm bootloader

sohyunjang — Tue, 18 Sep 2018 01:38:35 GMT

Hi, I use s12zvm MCU.

And I want to make bootloader.

So, I refer to AN4723 and S12ZVM_Bootloader of AN4723SW.

I need to add the code of AN4723SW.

and compile Erros is occured.

Out of allocation space in segment ROM at address 0xFFFAD8

The original bootloader code's ROM aera is

ROM = READ_ONLY 0xFFF800 TO 0xFFFBFF; // 1K for the bootloader FLASH-ONLY functions. Each 0x200 is 512
SHADOW_ROM_S = READ_ONLY 0xFFFC00 TO 0xFFFDFF; // 512 for funtions that will be copied to RAM

So, I want to increase the area of ROM.

Is it correct to make the following changes?

ROM = READ_ONLY 0xFFF600 TO 0xFFFBFF

and I change the code, in main.h

#define FLASH_SECTORS_TO_ERASE 251 /* 256 total - 1 interrupt vector - 4 (2k) for Bootloader = 251. Each sector is 512 bytes */

Do I need to change other code too?

thank you.

Re: s12zvm bootloader

dianabatrlova — Tue, 02 Oct 2018 11:28:23 GMT

Hi,

Let me apologize for the delay.

I have no error when I used your modifications.

This error may mean the space of the ROM is not big enough for your code.

I would like to recommend the newer application note AN12086 - Bootloader for the S12Z devices,

see Simple Serial Bootloader for S12Z - AN draft

I hope it helps you.

Best regards,

Diana

topic s12zvm bootloader in S12 / MagniV Microcontrollers

s12zvm bootloader

Re: s12zvm bootloader