Re: PB555 and Codewarrior

Hi Ian,
Thanks so much for your help, I got the FPU Buffer to be in the right 
place. However, I still get another error "Program Exception" on this 
line of code:
 
/*	PowerPC EABI init registers (stack, small data areas)
*/
	bl		__init_registers

I am guessing this line of code initializes the registers/stacks. Do 
you know how I can fix this?

Please advise!
Lei


--- In [email protected], "murphynetuk" <murphynetuk@y...> wrote:
> 0x003fff00 works for this location with the PB555.
> To alter it, for P&E debugger, (also MSI Wiggler I think)
> 
> 1. Launch CodeWarrior IDE 
>    from the Start->Programs->Metrowerks CodeWarrior menu
> 2. Open IDE Preferences dialog window using Edit->Preferences...
> 3. Choose Remote Connections under IDE Preference Panel->Debugger
> 4. Select Debugger "P&E BDM" and click 'Change...'
> 6. Choose Connection Type as Parallel
> 7. Choose Parallel Port, e.g. LPT1
> 8. Set IO Delay Count to 0
> 9. Set FPU Buffer Address to 0x003fff00
> 10. Click OK to finish
> 
> Ian
> 
> --- In [email protected], "coles555" <coles555@y...> wrote:
> > Hi Randy,
> > If I understand you correctly, the warning I am receiving is due 
to 
> > the scratchpad area that is needed by the debugger and the 
default 
> > scratchpad area starts in 0x00C00000, which, according to the CME 
> > manual, is the External Flash Memory for the CME board. Does this 
> > mean I need to modify the linker code so that the scratchpad area 
> can 
> > be moved to on-chip internal SRAM? Is this the only modification 
I 
> > need to make in Codewarrior for the PB to work?
> > 
> > Please advise and thank you for responding to my question!
> > Lei
> > 
> > --- In [email protected], Dees Randy-rsaf30 
<randy.dees@f...> 
> > wrote:
> > > linker files usually must be modified for any board specific 
> > details such as areas of memory that are ROM (or Flash) and SRAM.
> > >  
> > > the PB board does not have any external memory. the linker file 
> > usually must be modified for this.
> > >  
> > > The Floating Point Unit (FPU) registers can only be moved from 
> the 
> > floating point register directly to memory. in order for the 
> debugger 
> > to read a floating point register is to transfer it to memory and 
> > then read it from memory into a general purpose register, it can 
> then 
> > display the 64-bit value by reading the 32-bit registers. the 
> > CodeWarrior debugger requires a scratch pad area in RAM to be 
able 
> to 
> > read the Floating Point registers. They save the current values 
of 
> > the SRAM, read the FPU registers, and then put the original 
> contents 
> > back into the SRAM. Therefore, you must define in the debugger an 
> > area of SRAM in the target system that the debugger can use.  
> > >  
> > > One minor issue is that CodeWarrior always assumes that you 
have 
> > external SRAM at location 0x00C0_0000 that it can use for this 
> > scratchpad area.
> > >  
> > > randy 
> > > 
> > > -----Original Message-----
> > > From: [email protected] [mailto:[email protected]] On 
> > Behalf Of coles555
> > > 
> > > 
> > > Thank you so much for the help Ian. I was wondering if you 
could 
> be 
> > > more specific about the linker file, is that the 
> 5xx_Axiom_ROM.lcf 
> > > file? There are some address declarations within that file. Do 
> you 
> > know 
> > > of any other parameters I need to change for Codewarrior to 
work 
> > with 
> > > the PB board? If you are not sure or can't be more specific, 
can 
> > you 
> > > direct me to another source for this kind of information? Do 
you 
> > think 
> > > emailing Metrowerks or Axiom would help?
> > > 
> > > I'm not sure if this is something important but I do get a 
> warning 
> > in 
> > > Codewarrior saying that "0x00c00000 is invalid for FPU buffer"
> > > 
> > > 
> > > 
> > > [Non-text portions of this message have been removed]





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