stm32H705xb jlink调试不稳定求助

sjpu2008 提问时间：2020-10-21 22:14 /

问答
是否解决:

用jlink 调试h750 （400Mhz版本）+ uCOSIII  + spi nand flash，主频设置为400MHz，在调试过程中，经常会发生变量的值被意外修改，ucosIII经常会检测到任务栈溢出。但实际上栈区的空间占用很少，并未用完而溢出，而好像是栈指针意外被更改所致。将主频降到200MHz，直接在AXI RAM中运行，程序一切都正常；（主频200MHz调试也不正常）；主频400MHz连续运行，也不正常，总是会引起变量被修改。整个现象就像是CPU读写内存不稳定一样，经常数据不对。请教大家帮忙分析一下，是哪里的问题？
目前移植yaffs2 200Mhz主频，新建一个文件写入55KB数据，然后再读出对比数据与源数据是否相符，如此反复连续运行。连续运行56万个循环未出错一次。

MPU 配置如下：
void MPU_Config(void )
{
#if  ( __DCACHE_PRESENT == 1)
  MPU_Region_InitTypeDef MPU_InitStruct;

  /* 禁用MPU */
  HAL_MPU_Disable();

  /* 配置AXI RAM 属性*/
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x24000000;             //区域基地址。
  MPU_InitStruct.Size = MPU_REGION_SIZE_512KB;             //要配置的区域的区域大小。
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;       //数据访问权限
  MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;             //区域是可缓冲
  MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;    //区域是否可缓存
  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE; //是否共享。
  MPU_InitStruct.Number = MPU_REGION_NUMBER0; //区域保护。
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;             //
  MPU_InitStruct.SubRegionDisable = 0x00;             //子区域禁用字段。
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;    //指令访问禁用位。

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* 配置ITCM RAM 属性*/
  MPU_InitStruct.Number = MPU_REGION_NUMBER1;
  MPU_InitStruct.BaseAddress = 0x00000000; //区域基地址。
  MPU_InitStruct.Size = MPU_REGION_SIZE_64KB;    //要配置的区域的区域大小。
  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* 配置DTCM RAM 属性*/
  MPU_InitStruct.Number = MPU_REGION_NUMBER2;
  MPU_InitStruct.BaseAddress = 0x20000000; //区域基地址。
  MPU_InitStruct.Size = MPU_REGION_SIZE_128KB;    //要配置的区域的区域大小。
  HAL_MPU_ConfigRegion(&MPU_InitStruct);

/* 配置外设区域属性*/
  MPU_InitStruct.BaseAddress = 0x40000000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_256MB;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER3;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* 启用MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
#endif
}

内存配置如下：

/*###ICF### Section handled by ICF editor, don't touch! ****/
/*-Editor annotation file-*/
/* IcfEditorFile="$TOOLKIT_DIR$\config\linker\ST\IcfEditor\stm32h7xx.xml" */
/*-Specials-*/
define symbol __ICFEDIT_intvec_start__ = 0x20000000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_FLASH1_start__ = 0x08000000;
define symbol __ICFEDIT_region_FLASH1_end__ = 0x080FFFFF;
define symbol __ICFEDIT_region_ITCMR_start__  = 0x00000000;//64KB
define symbol __ICFEDIT_region_ITCMR_end__ = 0x0000FFFF;
define symbol __ICFEDIT_region_DTCMR1_start__ = 0x20000400;//64KB
define symbol __ICFEDIT_region_DTCMR1_end__ = 0x2000FFFF;
define symbol __ICFEDIT_region_DTCMR2_start__ = 0x20010000;//64KB
define symbol __ICFEDIT_region_DTCMR2_end__ = 0x2001FFFF;

define symbol __ICFEDIT_region_AXISR1_start__  = 0x24000000; //D1:512KB 分成两段，24000000-2403FFFF：作为动态内存区域
define symbol __ICFEDIT_region_AXISR1_end__ = 0x2403FFFF;

define symbol __ICFEDIT_region_AXISR_start__  = 0x24040000;  //D1:512KB 分成两段，24040000-2407FFFF：程序运行区
define symbol __ICFEDIT_region_AXISR_end__ = 0x2407FFFF;

/*-Sizes-*/

define symbol __ICFEDIT_size_cstack__    = 0x2000;
define symbol __ICFEDIT_size_heap__    = 0x1000;
/**** End of ICF editor section. ###ICF###*/

define memory mem with size = 4G;
define region FLASH_region  = mem:[from __ICFEDIT_region_FLASH1_start__ to __ICFEDIT_region_FLASH1_end__]
                           | mem:[from __ICFEDIT_region_FLASH2_start__ to __ICFEDIT_region_FLASH2_end__];

define region ITCMR_region  = mem:[from __ICFEDIT_region_ITCMR_start__  to __ICFEDIT_region_ITCMR_end__ ];
define region DTCMR_region  = mem:[from __ICFEDIT_region_DTCMR1_start__ to __ICFEDIT_region_DTCMR1_end__]
                           | mem:[from __ICFEDIT_region_DTCMR2_start__ to __ICFEDIT_region_DTCMR2_end__];
define region AXISR_region  = mem:[from __ICFEDIT_region_AXISR_start__  to __ICFEDIT_region_AXISR_end__ ];

define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__    { };
define block HEAP    with alignment = 8, size = __ICFEDIT_size_heap__    { };

initialize by copy { readwrite };
if (isdefinedsymbol(__USE_DLIB_PERTHREAD))
{
  initialize by copy with packing = none { section __DLIB_PERTHREAD };
}

do not initialize  { section .noinit };

place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
place in AXISR_region  { readonly};
place in ITCMR_region  { section .textrw };
place in DTCMR_region  { readwrite, block CSTACK,block HEAP};