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28335:例程中,F28335.cmd,为什么Zone7要分割为PAGE0的ZONE7A和PAGE1的ZONE7B?对访问片外设备有什么影响?



C2833x/C2823x C/C++ Header Files and Peripheral Examples Quick Start Version 1.31中的F28335.cmd

为什么Zone7要分割为PAGE0的ZONE7A和PAGE1的ZONE7B?对访问片外设备有什么影响?

F28335.cmd部分内容:

MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */

……
ZONE7A : origin = 0x0200000, length = 0x00FC00 /* XINTF zone 7 - program space */
……
PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
/* Registers remain on PAGE1 */

……
ZONE7B : origin = 0x20FC00, length = 0x000400 /* XINTF zone 7 - data space */
……
}

F28335.rar
  • rufeng Jing 说:

    C2833x/C2823x C/C++ Header Files and Peripheral Examples Quick Start Version 1.31中的F28335.cmd

    为什么Zone7要分割为PAGE0的ZONE7A和PAGE1的ZONE7B?对访问片外设备有什么影响?

    F28335.cmd部分内容:

    MEMORY
    {
    PAGE 0: /* Program Memory */
    /* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */

    这个注释应该已经告诉你答案了呀:这是用于保存程序数据,而下一段是数据空间。

    ……
    ZONE7A : origin = 0x0200000, length = 0x00FC00 /* XINTF zone 7 - program space */
    ……
    PAGE 1 : /* Data Memory */
    /* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
    /* Registers remain on PAGE1 */

    ……
    ZONE7B : origin = 0x20FC00, length = 0x000400 /* XINTF zone 7 - data space */
    ……
    }