at91rm9200 之nand flash驱动错误请指点

wzj071227

U-Boot 1.1.2 (Oct 20 2008 - 10:19:52)
U-Boot code: 21F00000 -> 21F1A4B4  BSS: -> 21F1EB60
RAM Configuration:
Bank #0: 20000000 32 MB
MxIC: flash_id = MX_MANUFACT & FLASH_VENDMASK = 0x  c20000
device_code = 0x227E ; FLASH_TYPEMASK = 0x0000FFFF
Macronix Flash : MX29LV640MTTC (64Mbit) dectect OK!
Flash:  8 MB
NAND:  No SmartMedia card inserted
128 MB
In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0
U-Boot112-AT91RM9200> ping 192.168.0.199
host 192.168.0.199 is alive
U-Boot112-AT91RM9200> nand info
Device 0: Samsung K9F1G08U0A at 0x40000000 (128 MB, 128 kB sector)
U-Boot112-AT91RM9200>
虽然上面NAND大小识别出来了，但读写操作还是不行啊！忘高人指点：
读写错误如下：
U-Boot112-AT91RM9200>
U-Boot112-AT91RM9200> nand read 0x21000000 0x40000000 0x20000
NAND read: device 0 offset 1073741824, size 131072 ...  0 bytes read: ERROR
U-Boot112-AT91RM9200> nand write 0x21000000 0x40000000 0x20000
NAND write: device 0 offset 1073741824, size 131072 ...  0 bytes written: ERROR
U-Boot112-AT91RM9200>

还有擦除的时候感觉非常的快，一回车就OK了，不像NOR flash 能明显看到擦除的时间。这个就没有

U-Boot112-AT91RM9200> nand erase 0x40000000 0x2000000
NAND erase: device 0 offset 1073741824, size 33554432 ... OK
U-Boot112-AT91RM9200>


忘高人指点一下，谢谢！！！

wzj071227

没有人做过这样的驱动吗？？同时驱动两个flash吗？？？

yidou

检测出来的Flash型号MX29LV640MTTC (64Mbit)对吗?

怎么有两片Flash, 另一片是Samsung K9F1G08U0A?

擦除时间查一下芯片手册, 会描述典型的时间.