Re: Interrupts don't interrupt?!

No, the BDM on the ColdFire is non-intrusive. It does not HALT the CPU and only
steals an occasional memory cycle to read and write RAM locations. The older
BDMs (like the CPU32) would FREEZE or HALT the CPU whenever they were performing
I/O. The new CF ones don't do that (much nicer :)

--Leon
 

> -----Original Message-----
> From: swiftx-bounce_at_forth.com
> [mailto:swiftx-bounce_at_forth.com] On Behalf Of Kenneth Butterfield
> Sent: Wednesday, April 18, 2007 2:51 PM
> To: swiftx_at_forth.com
> Subject: [swiftx] Re: Interrupts don't interrupt?!
>
> Hi Gerry
>
> Your problem is not with the interrupts but with the BDM
> port/XTL system in SWIFTX. This system over-rides the
> interrupts. It totally controls the processor when it wants
> to do i/o. The best thing you can do to test interrupt
> operation is to download, remove the BDM, boot and run. This
> means that you have to test your results through a serial
> port or some other I/O. While on the BDM interrupts do occur,
> but not in a timely fashion.
>
> Ken B
>
>
> >I checked the mask registers, they read as zero - so why don't
> >interrupts inter-rupt?! What am I doing wrong?
> >
> >Best regards,
> >Gerry
> >
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Received on Wed Apr 18 2007 - 14:53:32 PDT