Lpc2000

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.

 

 

 

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From: tah2k [mailto:tah2k@...] 
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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