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Lpc2000

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Message

Re: Data Aborts

2004-12-21 by tah2k

I forwarded additional info via email.
Thanks-
Tim

--- In lpc2000@yahoogroups.com, "Amit" <emailakb@y...> wrote:
> 
> Hi,
> 
> I just tried the same procedure and used the Flash ISP to load the 
> code. I then used the AxD to load the debug symbols. Everything 
seems 
> to be working fine. I can single step, run at full speed...etc
> 
> If you have a small blinky application just send it to my email 
> address and I can check it in my enviornment. 
> 
> amit
> 
> --- In lpc2000@yahoogroups.com, "tah2k" <tah2k@y...> wrote:
> > 
> > Multi-Ice autodetects the core based on the macrocell. It 
detects 
> > ARM7TDMI-S ETM. This looks right to me. To verify memory 
contents, 
> I 
> > downloaded the flash image using Philips Flash Utility, and it 
> > matches my code perfectly. 
> > 
> > --- In lpc2000@yahoogroups.com, "ian48harry" <ahi93@d...> wrote:
> > > 
> > > Have you "told" Multi-ICE what chip you are dealing with?  The 
> > AT91 
> > > is plain ARM7TDMI, the LPC2000 is -S.  Other tools allow 
specific 
> > > selection of chips rather than basic core types.
> > > 
> > > Ian
> > > 
> > > --- In lpc2000@yahoogroups.com, "tah2k" <tah2k@y...> wrote:
> > > > 
> > > > I understand where you are coming from, but I am trying to 
> > prevent 
> > > > buying more tools. From what I understand, the keil tools 
> > require 
> > > > their own emulator to actually run the debugger, and I 
already 
> > have 
> > > > 3 multi-ice. 
> > > > 
> > > > I am missing something, this should be trivial. If I reload 
the 
> > > > blinky application, it works just fine.
> > > > 
> > > > I have also got a keil mcb2100 board and I have the same 
issue.
> > > > 
> > > > 
> > > > --- In lpc2000@yahoogroups.com, "Dan Beadle" 
<dan.beadle@i...> 
> > > wrote:
> > > > > I suggest you download the Keil tools.  
> > > > > 
> > > > >  
> > > > > 
> > > > > Download their demos.  That will verify that everything is 
> > > working 
> > > > properly.
> > > > > 
> > > > > 
> > > > >  
> > > > > 
> > > > > From there, you could try the ARM tools with the Keil elf 
> > > output.  
> > > > At that
> > > > > point, you know that the board and the code are good.  So 
you 
> > > > would only be
> > > > > working one problem.
> > > > > 
> > > > >  
> > > > > 
> > > > >  
> > > > > 
> > > > >  
> > > > > 
> > > > >   _____  
> > > > > 
> > > > > From: tah2k [mailto:tah2k@y...] 
> > > > > Sent: Monday, December 20, 2004 4:15 PM
> > > > > To: lpc2000@yahoogroups.com
> > > > > Subject: [lpc2000] Data Aborts
> > > > > 
> > > > >  
> > > > > 
> > > > > 
> > > > > Still not up and running with my Arm tools and the Keil 
> > MCB2130.
> > > > > 
> > > > > I setup the Arm AXD debugger to run the following script 
on 
> > > > startup:
> > > > > 
> > > > > loadsymbols C:\Projects\Sampler_2138
> > \AppFlash\Output\AppFlash.axf
> > > > > setpc 0x0
> > > > > sreg cpsr 0xd3
> > > > > spp vector_catch 0
> > > > > spp semihosting_enabled 0
> > > > > 
> > > > > It basically loads the debug symbols for the image in the 
> 2138 
> > > > > flash, initializes the CPSR, sets the pc to 0, and 
disables 
> > > > > breakpoints at the Arm exceptions.
> > > > > 
> > > > > The debugger loads the source file correctly and the PC is 
> set 
> > at 
> > > > > 0x0 which is a branch to my startup handler at 0x20. 
However, 
> > if 
> > > I 
> > > > > run, or singlestep, or do anything, I get a "Data abort".
> > > > > 
> > > > > Also, if I try and display memory starting at 0x0, the 
> > debugger 
> > > > > gives an error "Memory access failed" and only gives the 
> > contents 
> > > > of 
> > > > > addresses 0-20, the rest 0's.
> > > > > 
> > > > > I thought perhaps the data abort had something to do with 
the 
> > > > > remapping done by the Philips boot loader, but I checked 
the 
> > > > MEMMAP 
> > > > > flag and it is set to 1, so I am running the flash at 0. 
> > > > > 
> > > > > I'm new to the part and evaluating it against the AT91 
> > pocessors, 
> > > > > and I am fresh out of ideas. The memory bus is internal so 
> its 
> > > not 
> > > > > like I can hook up my logic analyzer too get some ideas.
> > > > > 
> > > > > Is it possible the Philips memory accelerator is partly to 
> > blame? 
> > > > > Tehre must be otehrs using Arm tools with this part so I 
am 
> > > hoping 
> > > > > it is something trivial.
> > > > > 
> > > > > Any ideas are appreciated.
> > > > > Tim
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
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> > > > > 
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> > > > > 
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