-----Original Message----- From: Santoso, Yusdi [mailto:Yusdi_Santoso@adaptec.com] Sent: Tuesday, October 19, 2004 8:33 PM To: VanBaren, Gerald (AGRE); u-boot-users@lists.sourceforge.net Subject: RE: [U-Boot-Users] BDI2000 flashing problem

Hi gvb,

Thanks for the reply. What you said make sense but somehow I managed to get it work after tinkering with the BDI config file. I removed the "WORKSPACE" option in the [FLASH] section and the "prog" command worked well albeit much slower. Not sure why it is so...anybody can explain why?

My RAM is working properly because I can read/write to the address space perfectly, although I have not done a checker pattern test.

Thanks,

Yusdi

The "workspace" command tells the BDI2000 to load a helper program into RAM. The BDI2000 can then load the to-be-programmed data into a RAM buffer (which is fast) and run the helper program to program the RAM buffer data into flash. This obviously is the faster method, but requires more things to be operational on the board and with the processor.

Without the "workspace" command, the BDI2000 programs the data into flash directly which is considerably slower since bit-shifting the commands to do the write and poll for completion, etc. are much less efficient than the workspace method. This is slow but sure and only requires CPU and flash functionality to work.

You apparently have a problem with the RAM set up in your config file or a hardware problem with your RAM (in that order of likelyhood).

I forgot which processor you have, but most or all of the 8xx/8xxx processors have dual port RAM that you can also use for a workspace. Using this is much less complicated than getting SDRAM configured properly in the BDI2000 config file.

Trivia: WD recommends (wisely!) that you do _not_ do the SDRAM initialization in the BDI2000 config file. The problem people have with initializing SDRAM in the config file is that they will do the bulk of their development with the BDI2000 attached and never realize their program's SDRAM initialization is stuffed... then at time (ship_date - 1), they unplug the BDI2000 and find their board is dead without a heart-lung machine and they are in a world of hurt.

gvb

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