Writing to FMPLL.SYNCR causes exception

abeneschan — Tue, 26 Nov 2013 01:50:24 GMT

I'm tryin to get an MPC5566EVB board to work (using Code Warrior and P&E Micro ICDPPCNEXUS). I'm trying to get the provided sample project eSCI-Simple to work; I modified the source to use #include "mpc5566.h" and modified initSysclk() to include the code it looks like it should include.

However, when I try to step through it, it appears that this instruction:

FMPLL.SYNCR.R = 0x16080000;

is causing an exception. The instruction is trying to write to 0xC3F80000, which I think is the correct address of the FMPLL_SYNCR register. Based on the address it jumps to, the exception type seems to be 1, 2, 13, or 14 (there are four IVOR registers with the same value).

Something else that bothers me (I don't know if it's related) is that when I click on the ICDPPCNEXUS REG icon and try to display FMPLL_SYNCR, the window says the value of the register is 0xC3F80000 (same as the address), and it tries to break that value down into bits. This seems to be the case for most, but not all, of the registers in the C3Fxxxxx range.

I'm a software person and am pretty new to working with boards directly, so I can't tell what I might be missing. I haven't played with any config switches or anything on the board. Any help would be appreciated--thanks!

Re: Writing to FMPLL.SYNCR causes exception

abeneschan — Mon, 13 Jan 2014 20:27:02 GMT

OK, I figured it out (a couple days after I posted, but there have been problems with the account). Code Warrior came with some sample projects, but there weren't any specifically for MPC5566. I picked a processor that I thought would be close, but it wasn't close enough. The MPC5516 hardware initialization (which I had more or less ignored) didn't work on this board. So instead of selecting an existing project, I had to create a new one specifically for MPC5566 and then copy the source files from a sample project. This was probably obvious to anyone with more experience working with evaluation boards, but it took me a while to figure out. But I've gotten things working now.

topic Writing to FMPLL.SYNCR causes exception in CodeWarrior Development Tools

Writing to FMPLL.SYNCR causes exception

Re: Writing to FMPLL.SYNCR causes exception