DSP281X变量地址数组定位方法

2万 · 2008-5-5 23:00

void FlashObj::ChipErase(void)
{
  Busy = true;
  FLASH[0x5555] = 0xaa;
  FLASH[0x2AAA] = 0x55;
  FLASH[0x5555] = 0x80;
  FLASH[0x5555] = 0xaa;
  FLASH[0x2AAA] = 0x55;
  FLASH[0x5555] = 0x10;
  Wait(FLASH[0x5555]);
  Busy = false;
}

在函数ChipErase中,Flash变量地址0x85555是用FLASH[0x5555]表达的.
这样用数组寻址比较直观~~~

实现方法如下:

1.在CMD文件中

MEMORY
{
PAGE 0:    /* Program Memory */

PAGE 1:    /* Data Memory */
   ERAM        : origin = 0x100000, length = 0x04000
   EFLASH      : origin = 0x080000, length = 0x10000
}

SECTIONS
{
   ERamRegsFile          : > ERAM,        PAGE = 1
   EFlashRegsFile        : > EFLASH,      PAGE = 1
}

2.在C/C++文件中
#pragma DATA_SECTION("ERamRegsFile")
volatile unsigned int RAM[0x4000];

#pragma DATA_SECTION("EFlashRegsFile")
volatile unsigned int FLASH[0x10000];

3.在应用程序中
extern unsigned int RAM[];
extern unsigned int FLASH[];

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