flash ecc and ram ecc

Hi,

Can you please confirm what device you are trying this on?

Have you used Halcogen or some startup software to correctly initialize the system?

Sorry,I forgot .I use TMS570LS20206.I use KEIL4 and use keil4's startup.system initiaton file use halcogen .

after systeminit(),I call  _coreEnableEventBusExport_(),and _coreEnableRamEcc_(), then enable RAM ecc control.

then I run my program,I find out FROM 08400000 ,data are all 0xaa.

for example
 export     _coreEnableEventBusExport_
   

_coreEnableEventBusExport_

        mrc   p15, #0x00, r0,         c9, c12, #0x00
        orr   r0,  r0,    #0x10
        mcr   p15, #0x00, r0,         c9, c12, #0x00
        bx    lr

 export     _coreEnableRamEcc_
   

_coreEnableRamEcc_

        mrc   p15, #0x00, r0,         c1, c0,  #0x01
        orr   r0,  r0,    #0x0C000000
        mcr   p15, #0x00, r0,         c1, c0,  #0x01
        bx    lr

enable RAM ECC.

Zhangjie, are you calling _memoryInit_ as well?

The 0xaa throughout the CPU RAM looks like the remnants of some memory test sequence. I just want to make sure that at the end of the init before you enabled ECC you initialized the memory back to 0s using MSINENA.

It will help to have the full init sequence.

For the flash have you already programmed the flash content with ECC and still observing the ECC to be 0xaa?

1.I have called _memoryInit_ ,and after calling   _memoryInit_,memory data all 0,and ecc ram all 0x0c.But when my program run,after ram memory data change,the ECC RAM data to 0xaa. when I write to ram memory, need I  disable ram ecc?

2.For the flash,when I enable cp15's ECC,Flash data to be 0xaa.I have programmed the flash ecc data  to flash ecc space.

Zhangjie,

I am closing this thread because we have not heard from you for over 4 weeks. You can start a new thread if you need more information.

Thanks and regards,

Zhaohong