topic Re: MPC5777C Boot Issue in MPC5xxx

MPC5777C Boot Issue

jeffcampbell — Wed, 03 Aug 2016 14:56:44 GMT

I'm having trouble getting the MPC5777C to run a program out of ROM. I got it to run from RAM just fine.

With my ROM setup, I have configured memory as follows:

Address Value

0x0080_0000 0x015A0000

0x0080_0004 0x00800200

...

0x0080_0200 (start of program)

The other potential RCHW areas are unwritten, and I verified these locations via debugger.

However, when I reset the chip and follow it with a debugger, it seems to crash in the middle of startup and leave the PC pointing to 0xFFFF_4024, in the middle of the PASS memory area. I don't know why it's jumping there. Are there other boot setup steps I'm possibly missing?

Re: MPC5777C Boot Issue

petervlna — Thu, 04 Aug 2016 11:42:13 GMT

Hello,

There is nothing special which need to be done.
After reset the device start BAM and then jumps to start address defined in RCHW.

I have made tests exactly for your setup and had no issue to successfully execute program.

My example is attached.

If you want you can sent me your project, but there is nothing special to be done.

Check my example.

Peter

Re: MPC5777C Boot Issue

jeffcampbell — Fri, 05 Aug 2016 12:09:36 GMT

Thanks Peter, I'll check this out.

Re: MPC5777C Boot Issue

jeffcampbell — Mon, 08 Aug 2016 13:27:00 GMT

Well, your project works, but I'm a bit puzzled as to why - the project is configured for the MPC567xR. I tried setting up a stub project using only those settings, but with no luck. The only guess I can make is that I'm missing the board initialization library, but that doesn't seem to exist under the MPC5777C menu. I've attached the project below, hopefully I'm just missing something simple.

Re: MPC5777C Boot Issue

petervlna — Mon, 08 Aug 2016 13:35:25 GMT

Hi,

I have chosen Cobra90 initialization as the cores for Cobra55 (MPC5777C) and Cobra90(MPC567xR) are the same. As GHS do not released board initialization/startup codes for Cobra55 (at least in GHS 6.1.4. which I am using) there is no problem to use Cobra90 one.

Peter

Re: MPC5777C Boot Issue

jeffcampbell — Mon, 08 Aug 2016 14:56:22 GMT

That makes sense. I tried again with that in mind and it came together. I must've been using the wrong combination of files before.

Thanks for the help!