ColdFire/68K Microcontrollers and Processors中的主题 Software Reset of MCF5234 not working

Software Reset of MCF5234 not working

sirlenzelot — Tue, 25 Nov 2014 09:04:14 GMT

Hi All,

I am trying to soft-reset my MCF5234 with the following code, but nothing happens. The program just keeps looping and no reset is executed.

Does anyone encounter a similar problem?

Am I doing something wrong?

Thanks,

Dirk

asm(" MOVE $2700,SR");

asm(" MOVEA.L #$40110000,A0");

asm(" MOVE.B $C0,(A0)");

while (1) { }

Re: Software Reset of MCF5234 not working

TomE — Tue, 25 Nov 2014 10:04:00 GMT

Check the assembly syntax for your compiler.

I use gcc, and for it the assembly should be "MOVE #$2700, SR" and "MOVE.B #$C0, (A0)". Otherwise you're moving from memory location 0x2700 to the status register, and from memory location 0x00C0 to the Reset Control Register.

Read this one, there might be other problems with Soft Reset:

https://community.freescale.com/message/303708#303708

Tom

Re: Software Reset of MCF5234 not working

sirlenzelot — Tue, 25 Nov 2014 11:47:40 GMT

Thanks, Tom.

Indeed, I forgot the #s.

It's working now.