topic Re: Flash Problem 52235 in ColdFire/68K Microcontrollers and Processors

Flash Problem 52235

Frank13 — Thu, 29 Oct 2020 08:56:17 GMT

Hi!

I just wanted to start with my cobra52235-board. I use the 52235EVB test example from codewarrior. The program runs from RAM, but when I program it to Flash and try to debug, I get the following error. I use the CobraConnect Interface (compatible to P&E parallel interface).

Greetings

Frank Bußmann

Exception vector name: Bus ErrorPC where the exception happened: 0x00000A5Cthe code there is:
/* *    Startup routine for embedded application ... */asm void __declspec(register_abi) _startup(void){    /* disable interrupts */    move.w        #0x2700,sr.....

Re: Flash Problem 52235

TomE — Tue, 05 Oct 2010 14:06:58 GMT

Dump (examine memory before, at and after) 0x00000A5C and see what it decodes to.

Disassemble it using the debugger and then cross-check by hand-disassembling it as well.

Dump the whole vector area (from zero) and ensure the initial PC and SP are sane (and pointing to the above).

Can you single-step it from reset and see where it goes?

Internal or external FLASH?

Re: Flash Problem 52235

Frank13 — Tue, 05 Oct 2010 14:28:36 GMT

Hi!

It must have been a problem within the codewarrior. Today morning I tried again and got some different errors. A reinstallation of the compiler solved the problem.

Thanks!

Greetings

Frank