MPC5xxxのトピックMPC5644A Startup

MPC5644A Startup

erdinc26 — Thu, 22 Aug 2024 07:03:46 GMT

Hello,

I work on MPC5644A with XPC56XX 324BGA.

If I use default startup files provided by IDE, I can't initialize system clock. (In debug, I can't step forward after setting enhanced mode (EMODE) bit in ESYNCR1)

What can cause this problem in startup files? (I work on FLASH)

Best regards,

Erdinc

Re: MPC5644A Startup

lukaszadrapa — Mon, 26 Aug 2024 06:23:04 GMT

Hi @erdinc26

which IDE do you have? Clocks are initialized by user's code, not by startup files.

You can try to generate clock initialization code by this calculator:

https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/Excel-MPC55xx-MPC56xx-PLL-Calculator/ta-p/1121000

Regards,

Lukas

Re: MPC5644A Startup

erdinc26 — Mon, 26 Aug 2024 06:37:08 GMT

Thanks for your answer @lukaszadrapa
Essentially, I have a different startup file. Its differences between generated by IDE are flash config. (Reset vector and clock freq. of flash). That works with my code. I can initialize my clock with these settings.
I thought that there is something doesn't match with my main code. I'm trying to find this issue. Do you have any idea?
Best regards,
Erdinc

Re: MPC5644A Startup

erdinc26 — Mon, 26 Aug 2024 07:57:44 GMT

I have CodeWarrior for MCU Version: 10.6

Re: MPC5644A Startup

lukaszadrapa — Tue, 27 Aug 2024 07:38:36 GMT

That's too general description, so I can't really say. Important point is to have all the clock settings within the spec and also double check flash wait states.