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最近在调试NOR Flash，C6657的EMIF地址线只有24根，但是CE1连接的NOR Flash有27根地址线，现在用3个GPIO作为flash的高地址扩展，请问用GPIO做高地址扩展时程序上应该怎么编写，现在完全没有思路，恳请大神指导
可以这样理解GPIO做高地址时的地址范围 GPIO2GPIO2GPIO0A23A22.....A1A0: 00000......00 00000......01 .................... 16M 00011......11 00100.......00 00100.......01 ..................... 16M 00111........11 ..................... ..... ..................... 11100.........00 11100..........01 ...................... 16M 11111..........11
