topic Re: BAF configuration in MPC5xxx

BAF configuration

vladstoica — Thu, 05 May 2016 11:17:04 GMT

Hello,

I am making a firmware update in flash memory of MPC5748G, and I am writing in a different sector a new startup code, text code, etc. I want to modify the BAF configuration so after a reset it will start from the new sector and not from the old one. What registers should I modify for that?

Thanks,

Vlad

Re: BAF configuration

lukaszadrapa — Fri, 06 May 2016 10:43:40 GMT

Hi,

this is copied from reference manual:

So, it is necessary to place a constant to one of addresses shown above. Something like this:

#pragma ghs section rodata=".boot_header"

const uint32_t bootheader = 0x005A0002; // e200z4a will start execution

const uint32_t z2_reset_vector = 0;

const uint32_t cnfg1_bits = 0;

const uint32_t cnfg2_bits = 0;

const uint32_t startAddress = (uint32_t) _start; //start address of e200z4a

const uint32_t z4b_reset_vector = 0;

const uint32_t reserved_for_future_use = 0;

#pragma ghs section rodata=default

If there are more valid boot headers, the first one is used. If you want to make other boot header active, it is necessary either erase the previous one or jump to specified start address of second application by your software.

Regards,

Lukas

Re: BAF configuration

vladstoica — Tue, 10 May 2016 10:16:11 GMT

Thank you very much!