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AM3505 GPMC配置中遇到的问题

Other Parts Discussed in Thread: AM3505

大家好,我的项目中使用了AM3505,其中 GPMC挂接了NAND和FPGA,NAND工作正常,在驱动程序中配置了GPMC后,GPMC和FPGA不能正常通信,用示波器察看片选、nADV等信号,片选信号一直为高,nADV一直为低,不知道问题在哪里,请大家帮忙。我是按照如下步骤配置的:

1 配置片选ncsx的基地址和空间大小

2 将相应地址映射后,对该地址进行读写操作