[U-Boot-Users] AT91RM9200EK erase ATMEL dataflash
Hi, I use u-boot-1.1.2 on an AT91RM9200EK board. Does anybody knows how to erase the dataflash which is connected to the SPI?
I tried:
U-Boot1.1.2 > flinfo DataFlash:AT45DB642 Nb pages: 8192 Page Size: 1056 Size= 8650752 bytes Logical address: 0xC0000000 Area 0: C0000000 to C0007FFF Area 1: C0008000 to C001FFFF Area 2: C0020000 to C0027FFF Area 3: C0028000 to C083FFFF
U-Boot1.1.2 > protect off c0000000 c001ffff Un-Protect 2 DataFlash Sectors U-Boot1.1.2 > erase c0000000 c001ffff Error: start and/or end address not on sector boundary
The copy of images with "cp.b" to this flash seems to work properly, even without erasing the flash before. Regards Sascha
"S. Dikhoff" dikhoff@gmx.de schreibt:
Does anybody knows how to erase the dataflash which is connected to the SPI? U-Boot1.1.2 > erase c0000000 c001ffff Error: start and/or end address not on sector boundary
Hi, U-Boot does not support dataflash erase. You can emulate an erase by overwriting with FF (yes, it's possible, see below).
The copy of images with "cp.b" to this flash seems to work properly, even without erasing the flash before.
Thats because the Atmel dataflash does not need any explicit erase (see the datasheet for more details).
Cheers Anders
participants (2)
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Anders Larsen -
S. Dikhoff