Synth-DIY Yahoo! Groups Archives

Thread

RE: [AVR-Chat] Re: Project status report and question ...

2011-01-05 by Tim Mitchell

----Original Message----

Show quoted textHide quoted text

From: AVR-Chat@yahoogroups.com
[mailto:AVR-Chat@yahoogroups.com] On Behalf Of
wagnerj@proaxis.com Sent: 05 January 2011 00:15 To:
AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re:
Project status report and question ... 

> Agree, but....
> 
> I think this is an inherent limit due to JTAG debugging.
> You don't get 
> history information out of JTAG. You just get the current
> state at the 
> breakpoint. The "alternative" would be single-step
> operation, which would 
> hardly be "real-time", due to the less than speedy
> traffic on the JTAG 
> link.
> 

I know we discussed ARM-Cortex M3 vs. AVR mega when you were earlier in this project, and Chuck decided that AVR mega was fine for what he was doing. However, Cortex M3 can do this via JTAG as the processor has built in hardware to do it - using with Rowley Crossworks you can get real time procedure call stack, real time variable display, monitor the ram and processor registers, and all sorts of goodies. 

Just for future reference!!

-- 
Tim Mitchell

RE: [AVR-Chat] Re: Project status report and question ...

2011-01-05 by Prashant D. Kharade

Hello Tim,

 

I am using AVR. 

If one wants to shift to arm, what shall be the start point.

Arm7, Arm9 or new cortex.

 

Which make arm controllers are good as learning curve.

 

Thanks

 

Prashant

Show quoted textHide quoted text

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
Behalf Of Tim Mitchell
Sent: 05 January 2011 14:43
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] Re: Project status report and question ...

----Original Message----
From: AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> 
[mailto:AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com> ]
On Behalf Of
wagnerj@proaxis.com <mailto:wagnerj%40proaxis.com>  Sent: 05 January
2011 00:15 To:
AVR-Chat@yahoogroups.com <mailto:AVR-Chat%40yahoogroups.com>  Subject:
Re: [AVR-Chat] Re:
Project status report and question ... 

> Agree, but....
> 
> I think this is an inherent limit due to JTAG debugging.
> You don't get 
> history information out of JTAG. You just get the current
> state at the 
> breakpoint. The "alternative" would be single-step
> operation, which would 
> hardly be "real-time", due to the less than speedy
> traffic on the JTAG 
> link.
> 

I know we discussed ARM-Cortex M3 vs. AVR mega when you were earlier in
this project, and Chuck decided that AVR mega was fine for what he was
doing. However, Cortex M3 can do this via JTAG as the processor has
built in hardware to do it - using with Rowley Crossworks you can get
real time procedure call stack, real time variable display, monitor the
ram and processor registers, and all sorts of goodies. 

Just for future reference!!

-- 
Tim Mitchell

Internal Virus Database is out of date.
Checked by AVG - www.avg.com
Version: 9.0.819 / Virus Database: 271.1.1/2842 - Release Date: 04/29/10
11:57:00

[Non-text portions of this message have been removed]

Re: [AVR-Chat] Re: Project status report and question ...

2011-01-08 by Richard Reeves

I've been using a couple of Cortex-M3 evaluation boards from Luminary
Micro (now part of Texas Instruments), specifically the the LM3S1968
and LM3S6965 (that one has ethenet).  The peripherals are
straightforward (if you understand Timer1 on an AVR, the timers on the
LM3S micros are easy to use, for example) and most of the range run to
50MHz (the ICs warm up, though), with some now running upto 100MHz.
TI supply a peripheral library called StellarisWare, which gives you
everything from register and bit definitions to peripheral-specific
macros to make life very easy.

And the boards are quite cheap.

Richard

-----
On 5 January 2011 09:43, Prashant D. Kharade <pdkharade@adorpower.com> wrote:
>
>
>
> Hello Tim,
>
> I am using AVR.
>
> If one wants to shift to arm, what shall be the start point.
>
> Arm7, Arm9 or new cortex.
>
> Which make arm controllers are good as learning curve.
>
> Thanks
>
> Prashant
>
>

-----

Re: [AVR-Chat] Re: Project status report and question ...

2011-01-08 by Leon Heller

On 05/01/2011 09:43, Prashant D. Kharade wrote:
> Hello Tim,
>
>
>
> I am using AVR.
>
> If one wants to shift to arm, what shall be the start point.
>
> Arm7, Arm9 or new cortex.
>
>
>
> Which make arm controllers are good as learning curve.

Cortex. NXP.

Leon
-- 
Leon Heller
G1HSM