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外挂norflash读取的问题

fegnlin he
Intellectual 270 points
Other Parts Discussed in Thread: AM3358

AM3358外挂norflash，地址和数据不复用，配置gpnc的过程是  使能gpmc时钟，pinmux所有管脚，配置gpmc寄存器。读器件id代码: flashbase=0x08040000

uint16  *p;

p=(uint16 *)flashbase;

*p=0x90;

程序在DDR里面调试，最后一条指令一执行，程序就死掉了，查看gpmc错误寄存器，错误地址就是0x08040000，错误代码0x511