Re: Small ARM7 with realtime debug memory access?

RobertTeufelDUS@xxxxxxxxx wrote:

are there really still no small (e.g. 128K Flash, 100 Pins) ARM7
derivatives with non-intrusive realtime memory access?

As far as I see, they all need an interrupt routine to send
information to the host.

[...]

I'll give it one more shot. Have a look here:
http://www.keil.com/support/man/docs/ulink2/ulink2_realtime_agent.asp?bhcp=1
This program, the real-time agent will work during your "idle task"
and display or even modify memory.

that's waht I meant by "As far as I see, they all need an interrupt
routine to send information to the host".

What you are looking for is called history. A bond out emulator were

No.

every bus, including the internal memory bus is accessible to an
outside supervisor processor. This supervisor can watch all memories
but as soon as you try to modify anything, you will interfere with
real-time. This concept has two major disadvantages: Number one, it is
too expensive, number two, it is too expensive ;-) actually number tow

Read about the Freescale BDM in the HC(S)12 and the S08. It reads from
target memory usually without any effect on the target. The Coldfire
BDM also reads from a running target, but this causes a slight delay.

Certainly they let me also write to the target memory, but that's no
more "non-intrusive" <g>.

But it's a great tool during system test and optimization. I put many
settings or status indicators in global variables during development
and can test and tweak the system like I test and tweak hardware with
a scope and trimpots on a breadboard.

Oliver
--
Oliver Betz, Munich
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