RCHW for powerpc MPC5566

Hello Community,

I am new to PowerPC and I have the Freescale MPC5566EVB with me for
experimenting with MPC5566. I am using CodeWarrior with PENexus Micro
debugger.
My aim is to develop a code for FMPLL and store it in MPC internal SRAM.
Then I want to boot the device from the internal SRAM. I have two questions
regarding this.
1. What is the configuration of BOOTCFG for booting from 'internal SRAM'?
2. At what address should I specify the RCHW and how will I specify it in
the linker file? 

When I am loading the code in Internal SRAM using debugger and executing,
the MCU is working properly. But I am not configuring the RCHW in the lcf
file. I suspect that the debugger is itself configuring the MCU for proper
operation (please correct me if I am wrong). Hence my worry is that the
same code won't run when I load it in the internal Flash since it won't
configure the MCU properly.

Please provide your valuable comments. Thank you.


	   
					
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On 30/01/2012 01:25, matrix13 wrote:
> Hello Community,
>
> I am new to PowerPC and I have the Freescale MPC5566EVB with me for
> experimenting with MPC5566. I am using CodeWarrior with PENexus Micro
> debugger.
> My aim is to develop a code for FMPLL and store it in MPC internal SRAM.
> Then I want to boot the device from the internal SRAM. I have two questions
> regarding this.
> 1. What is the configuration of BOOTCFG for booting from 'internal SRAM'?
> 2. At what address should I specify the RCHW and how will I specify it in
> the linker file?
>
> When I am loading the code in Internal SRAM using debugger and executing,
> the MCU is working properly. But I am not configuring the RCHW in the lcf
> file. I suspect that the debugger is itself configuring the MCU for proper
> operation (please correct me if I am wrong). Hence my worry is that the
> same code won't run when I load it in the internal Flash since it won't
> configure the MCU properly.
>
> Please provide your valuable comments. Thank you.
>

You can't boot from internal SRAM.  You can boot from internal flash, or 
the internal bootloader (for serial boot, CAN boot, etc., - I don't know 
exactly which ones the MPC5566 supports), or from external memory.  But 
it doesn't make sense to boot from sram - there is no code in it at 
power-on.