LPC2478 Port

Kernel
1

partytubie wrote on Monday, July 13, 2009:

Did anyone already made a port for the NXP LPC2478.
I was trying to do so using Rowley CrossWorks v2.0, project builds but when debugging it seems that the processor always ends up at:

pabort_handler:
  b pabort_handler

in the file Philips_LPC230x_startup

2

edwards3 wrote on Monday, July 13, 2009:

I don’t think it will be too different to to the LPC2368 demo. Did you put the CPU in Supervisor mode before calling main()?

3

partytubie wrote on Friday, August 14, 2009:

I’ve tried to debug and noticed that the processor calls the abort handler when the following instruction “SUBS    PC, LR, #4” is called in the function “portRESTORE_CONTEXT”.
Does anybody have an idea??
Thanks

4

rtel wrote on Friday, August 14, 2009:

Make sure the processor is in Supervisor mode before that line is executed.  Best to use the start up files from from the FreeRTOS download that set Supervisor mode before calling main.

Regards.

5

partytubie wrote on Friday, August 14, 2009:

Supervisor mode? how does that work?

6

partytubie wrote on Friday, August 14, 2009:

You where right, added the following to the preprocessor defenitions:
GCC_ARM7
SUPERVISOR_START
VECTORED_IRQ_INTERRUPTS
PACK_STRUCT_END=__attribute__((packed))
ALIGN_STRUCT_END=__attribute__((aligned(4)))