[参考译文] TMS320F280023：闪存存储器映射-字节访问

尊敬的 Nguyen：

您无法访问字节。  如果您需要访问一个字节、您可以读取16位并丢弃您不需要的字节。   

我记得 C28x 的 romwidth 和 memwidth 应该为16。   

此外、C2000十六进制实用程序为 PAGE 0和 PAGE 1生成单独的十六进制文件。 编译时、您将注意到十六进制实用程序发出有关此问题的警告。 如果只加载一个十六进制文件、则会丢失另一页的内容。  为了避免此问题、通常情况下、当您使用十六进制文件时、请将所有初始化的段映射到链接器 cmd 文件中的 PAGE 0。

谢谢、此致、
Vamsi

Nguyen、

能否检查链接器 cmd 文件并查看是否有任何内容单独映射到 PAGE 0和 PAGE 1？   

如果未定义页面、则这不应成为问题。  如果在链接器 cmd 文件中定义了页面、我可以帮助您修改它以将所有内容移动到 PAGE 0 -完成此操作后、应该只有一个文件用于加载。

谢谢、此致、
Vamsi  

您好、Vamsi、

我无法正确获取"页面"的含义。 它是指"组"(PAGE 0 <=>BANK0)还是指"扇区"(PAGE 0 <=>SECTOR0)  

我的推导仅具有一个组0和8个扇区

链接器文件如下所示

MEMORY
{
   BEGIN            : origin = 0x080000, length = 0x00003B
   BOOT_RSVD    : origin = 0x00000002, length = 0x00000126
   RAMM0            : origin = 0x00000128, length = 0x000002D8
   RAMM1            : origin = 0x00000400, length = 0x000003F8     /* on-chip RAM block M1 */
// RAMM1_RSVD       : origin = 0x000007F8, length = 0x00000008 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */

/* RAMLS4           : origin = 0x0000A000, length = 0x00000800
   RAMLS5           : origin = 0x0000A800, length = 0x00000800
   RAMLS6           : origin = 0x0000B000, length = 0x00000800
   RAMLS7           : origin = 0x0000B800, length = 0x00000800*/
   
   /* Combining all the LS RAMs */
   RAMLS4567        : origin = 0x0000A000, length = 0x00002000
   RAMGS0           : origin = 0x0000C000, length = 0x000007F8
// RAMGS0_RSVD      : origin = 0x0000C7F8, length = 0x00000008 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */


//  FLASHBANK1       : origin = 0x00080000, length = 0x0000FFF0
//  FLASH_BANK1_RSVD : origin = 0x0008FFF0, length = 0x00000010 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */
   BOOTROM          : origin = 0x003F0000, length = 0x00008000
   BOOTROM_EXT      : origin = 0x003F8000, length = 0x00007FC0
   RESET            : origin = 0x003FFFC0, length = 0x00000002
   /* Flash sectors */
   /* BANK 0 */
   FLASH_BANK0_SEC0  : origin = 0x08003B, length = 0x000FC5 /* on-chip Flash */
   FLASH_BANK0_SEC1  : origin = 0x081017, length = 0x000FE9 /* on-chip Flash */
   FLASH_BANK0_SEC2  : origin = 0x082000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC3  : origin = 0x083000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC4  : origin = 0x084000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC5  : origin = 0x085000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC6  : origin = 0x086000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC7  : origin = 0x087000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC8  : origin = 0x088000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC9  : origin = 0x089000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC10 : origin = 0x08A000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC11 : origin = 0x08B000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC12 : origin = 0x08C000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC13 : origin = 0x08D000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC14 : origin = 0x08E000, length = 0x001000 /* on-chip Flash */
   FLASH_BANK0_SEC15 : origin = 0x08F000, length = 0x000FF0 /* on-chip Flash */
// FLASH_BANK0_SEC15_RSVD     : origin = 0x08FFF0, length = 0x000010  /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */

}


SECTIONS
{
   codestart        : > BEGIN, ALIGN(8)
   .text            : >> FLASH_BANK0_SEC0 | FLASH_BANK0_SEC1,   ALIGN(8)
   .cinit           : > FLASH_BANK0_SEC1,  ALIGN(8)
   .switch          : > FLASH_BANK0_SEC1,  ALIGN(8)
   .reset           : > RESET,                  TYPE = DSECT /* not used, */

   .stack           : > RAMM1

   .init_array      : > FLASH_BANK0_SEC1,  ALIGN(8)
   .bss             : > RAMLS4567
   .bss:output      : > RAMLS4567
   .bss:cio         : > RAMLS4567
   .const           : > FLASH_BANK0_SEC1,  ALIGN(8)
   .data            : > RAMLS4567
   .sysmem          : > RAMLS4567

    ramgs0 : > RAMGS0

  GROUP
   {
       .TI.ramfunc
       {
          -l FlashAPI_F28002x_FPU32.lib
       }
   }  LOAD = FLASH_BANK0_SEC1,
    RUN = RAMLS4567,
    LOAD_START(RamfuncsLoadStart),
    LOAD_SIZE(RamfuncsLoadSize),
    LOAD_END(RamfuncsLoadEnd),
    RUN_START(RamfuncsRunStart),
    RUN_SIZE(RamfuncsRunSize),
    RUN_END(RamfuncsRunEnd),
    ALIGN(8)
}

此致、

问题