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对OEMAddressTable以及2440一些硬件连接的疑惑
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以前,一直是在开发板上修改程序,遇到的都是一些软件问题,现在新板子增加了外设,就开始迷茫了。
我看了立宇泰的OEMAddressTable,如下:
OEMAddressTable
;;;-------------------------------------------------------------
;;; Virt Addr Phys Addr MB
;;;-------------------------------------------------------------
DCD 0x80000000, 0x02000000, 30 ; 30 MB SROM(SRAM/ROM) BANK 0
DCD 0x82000000, 0x08000000, 32 ; 32 MB SROM(SRAM/ROM) BANK 1
DCD 0x84000000, 0x10000000, 32 ; 32 MB SROM(SRAM/ROM) BANK 2
DCD 0x86000000, 0x18000000, 32 ; 32 MB SROM(SRAM/ROM) BANK 3
DCD 0x88000000, 0x20000000, 32 ; 32 MB SROM(SRAM/ROM) BANK 4
DCD 0x8A000000, 0x28000000, 32 ; 32 MB SROM(SRAM/ROM) BANK 5
DCD 0x8C000000, 0x30000000, 64 ; 64 MB DRAM BANK 0,1
DCD 0x90800000, 0x48000000, 1 ; Memory control register
DCD 0x90900000, 0x49000000, 1 ; USB Host register
DCD 0x90A00000, 0x4A000000, 1 ; Interrupt Control register
DCD 0x90B00000, 0x4B000000, 1 ; DMA control register
DCD 0x90C00000, 0x4C000000, 1 ; Clock & Power register
DCD 0x90D00000, 0x4D000000, 1 ; LCD control register
DCD 0x90E00000, 0x4E000000, 1 ; NAND flash control register
DCD 0x91000000, 0x50000000, 1 ; UART control register
DCD 0x91100000, 0x51000000, 1 ; PWM timer register
DCD 0x91200000, 0x52000000, 1 ; USB device register
DCD 0x91300000, 0x53000000, 1 ; Watchdog Timer register
DCD 0x91400000, 0x54000000, 1 ; IIC control register
DCD 0x91500000, 0x55000000, 1 ; IIS control register
DCD 0x91600000, 0x56000000, 1 ; I/O Port register
DCD 0x91700000, 0x57000000, 1 ; RTC control register
DCD 0x91800000, 0x58000000, 1 ; A/D convert register
DCD 0x91900000, 0x59000000, 1 ; SPI register
DCD 0x91A00000, 0x5A000000, 1 ; SD Interface register
DCD 0x92000000, 0x00000000, 2 ; 2 MB SROM(SRAM/ROM) BANK 0----前面已经有了BANK 0,为什么这里还会有?这样做有什么好处?
DCD 0x00000000, 0x00000000, 0 ; End of Table (MB MUST BE ZERO!)
END
;-----------------------------------------------------------------
还有,我看2440和nand flash的硬件连线,让我纳闷的是没有nGCSX(X=0~7),现在我搞不清楚nand flash地址是如何确定的,挂靠在哪个BANK
最后一个问题,如果我外设接了一块芯片,用nGCS4片选,那么这块芯片的物理地址是什么?该怎么样读写该芯片?
麻烦各位了,帮帮菜鸟,感激不尽。
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