trouble program T2080 IFC NAND FLASH(MT29F4G08) in vxWorks

[姜伟琼]

T2080RDB Rev-C machine

In uboot, the NAND FLASH can be access using :   nand dump 0 ...   can printf some information

I run vxWorks OS in this RDB board,  CPLD and NOR FLASH can work good, but NAND FLASH can not work good.

1、VxWorks OS version: 6.9

2、Initial IFC timing, and set the LAW values

3、NOR  ---> CS0

     CPLD ----> CS2

     NAND ----> CS1

when i port the nand flash initial code to vxWorks,  access the CS1 LAWs address space,  i can not detect the CS1 singnal.  and i found that when i just modify the NAND TIMING to work GPCM mode, CS1 falling edge singnal is present. why????   anybody can help me?

[姜伟琼]

THANK YOU VERY MUCH!!!

[alexander_yakov]

In case if you are observing CS1 is not asserted, when you accessing this address space, than this may mean:

1. CS1 address space is not configured.

2. LAWs are not configured.

3. Some other device is configured to overlap this address space.

Have a great day,
Alexander

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