[U-Boot-Users] BDI/flash question
After spending the time (and money) on getting the BDI2000 and u-boot working on the DBAU1500 board, our hardware guys finally delivered me a couple of our own design boards with Au1500 processors on them. I connected the BDI2000 to one of our boards, and when it wouldn't erase the flash and after a call to the HW engineer, found out that it has a different flash. OK, changed the flash type to the correct one, and also the bus width was changed to 16 as opposed to the 32 on the DBAU1500. The BDI will now erase and program the flash, but u-boot won't come up. After a bit of digging I found that after an erase the flash looks like this:
BDI>md 0xbfc00000 bfc00000 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00010 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00020 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00030 : 0000ffff 0000ffff 0000ffff 0000ffff ................
and on, and on.....
Does anyone have any idea what could cause this? Our HW guy is pouring over the schematics trying to find something, but I want to make sure it isn't something stupid I did on the BDI2000 config.
Ed Okerson
On Wed, Jan 14, 2004 at 08:44:30PM -0600, Ed Okerson wrote:
After spending the time (and money) on getting the BDI2000 and u-boot working on the DBAU1500 board, our hardware guys finally delivered me a couple of our own design boards with Au1500 processors on them. I connected the BDI2000 to one of our boards, and when it wouldn't erase the flash and after a call to the HW engineer, found out that it has a different flash. OK, changed the flash type to the correct one, and also the bus width was changed to 16 as opposed to the 32 on the DBAU1500. The BDI will now erase and program the flash, but u-boot won't come up. After a bit of digging I found that after an erase the flash looks like this:
BDI>md 0xbfc00000 bfc00000 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00010 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00020 : 0000ffff 0000ffff 0000ffff 0000ffff ................ bfc00030 : 0000ffff 0000ffff 0000ffff 0000ffff ................
and on, and on.....
Does anyone have any idea what could cause this? Our HW guy is pouring
I've no idea really, but have you verified correct BUSWIDTH, e.g.:
BUSWIDTH {8,16,32}?
-- Regards, George
over the schematics trying to find something, but I want to make sure it isn't something stupid I did on the BDI2000 config.
Ed Okerson
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On Wed, 14 Jan 2004, George G. Davis wrote:
I've no idea really, but have you verified correct BUSWIDTH, e.g.:
BUSWIDTH {8,16,32}?
Yes, this is one of the things that changed on our board versus the DBAU1500. The DBAU1500 has BUSWIDTH 32 and our board has BUSWIDTH 16. Is this the only thing that needs to be changed to use 16 bit flash?
Ed Okerson
On Wed, Jan 14, 2004 at 11:03:25PM -0600, Ed Okerson wrote:
On Wed, 14 Jan 2004, George G. Davis wrote:
I've no idea really, but have you verified correct BUSWIDTH, e.g.:
BUSWIDTH {8,16,32}?
Yes, this is one of the things that changed on our board versus the DBAU1500. The DBAU1500 has BUSWIDTH 32 and our board has BUSWIDTH 16. Is this the only thing that needs to be changed to use 16 bit flash?
Um, sorry for my ignorance, you already noted that. I'm clearly clueless! 8 )
-- Regards, George
Ed Okerson
participants (3)
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Ed Okerson -
George G. Davis -
George G. Davis