Strange problem when re-arrange flash blocks

ck_max — Wed, 14 Jul 2010 11:14:56 GMT

Hi,

I'm using 52255 for current project. It's working only with internal flash and SRAM, and works fine.

When I try to re-arrange flash blocks for putting something like bootloader in front of normal program, problem happened.

The original flash blocks like following

# original settings

## intflash (RX): ORIGIN = 0x00000000, LENGTH = 0x00080000

## sram (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000

vectorrom (RX): ORIGIN = 0x00000000, LENGTH = 0x00000400

cfmprotrom (RX): ORIGIN = 0x00000400, LENGTH = 0x00000020

rom (RX): ORIGIN = 0x00000420, LENGTH = 0x0007FBE0

ram (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000

I put bootloader in first 64KB like this

## intflash (RX): ORIGIN = 0x00000000, LENGTH = 0x00080000

## sram (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000

bootloader (RX): ORIGIN = 0x00000000, LENGTH = 0x00010000 # bootloader

vectorrom (RX): ORIGIN = 0x00010000, LENGTH = 0x00000400

cfmprotrom (RX): ORIGIN = 0x00010400, LENGTH = 0x00000020

rom (RX): ORIGIN = 0x00010430, LENGTH = 0x0006FBD0 # Code + Const data

ram (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000 # SRAM - RW data

I create another project for bootloader, but I just put an direct jump to normal program start for testing.

Program stopped in initializing PHY.

There is an loop for auto-negotiate with PHY in BSP of MQX.

Normally it works fine. But it stuck when I shift all program at 0x00010000.

Is that anything I missed when moving blocks?

Please help, I've try days for this, I cannot understand why the same code cause different results.

Thanks!

Re: Strange problem when re-arrange flash blocks

doublev724 — Mon, 02 Aug 2010 21:00:20 GMT

Don't put bootloader in the begining of flash. Try to put it from 1000~1fff instead. It seems like we shouldn't modify address for these vector tables.

ColdFire/68K Microcontrollers and ProcessorsのトピックRe: Strange problem when re-arrange flash blocks

Strange problem when re-arrange flash blocks

Re: Strange problem when re-arrange flash blocks