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标题: NRF52840中断向量表重定向配置异常求助 [打印本页]

作者: momo_qu 时间: 2021-11-5 08:36
标题: NRF52840中断向量表重定向配置异常求助
当前产品需要重新映射中断向量，用到SCB->VTOR寄存器，但是实际测试发现，给该寄存器写入值后再读出，值不一致，造成中断响应异常，请大牛指导。
中断重定向代码配置，g_hwiForm是一个数组：
/* Interrupt vector table location */
SCB->VTOR = (UINT32)(UINTPTR)g_hwiForm;

printf("[%s] g_hwiForm = %x\r\n", __func__, (UINTPTR)g_hwiForm);
printf("[%s] SCB->VTOR = %x\r\n", __func__, SCB->VTOR);

SCB->VTOR寄存器的定义，cotex-m4的标准定义：
#define SCS_BASE          (0xE000E000UL)                         /*!< System Control Space Base Address */
#define SCB                ((SCB_Type    *)    SCB_BASE    ) /*!< SCB configuration struct */

/**
  \brief  Structure type to access the System Control Block (SCB).
*/
typedef struct
{
  __IM  uint32_t CPUID;                /*!< Offset: 0x000 (R/ )  CPUID Base Register */
  __IOM uint32_t ICSR;                /*!< Offset: 0x004 (R/W)  Interrupt Control and State Register */
  __IOM uint32_t VTOR;                /*!< Offset: 0x008 (R/W)  Vector Table Offset Register */
  __IOM uint32_t AIRCR;                /*!< Offset: 0x00C (R/W)  Application Interrupt and Reset Control Register */
  __IOM uint32_t SCR;                   /*!< Offset: 0x010 (R/W)  System Control Register */
  __IOM uint32_t CCR;                   /*!< Offset: 0x014 (R/W)  Configuration Control Register */
  __IOM uint8_t  SHP[12U];             /*!< Offset: 0x018 (R/W)  System Handlers Priority Registers (4-7, 8-11, 12-15) */
  __IOM uint32_t SHCSR;                /*!< Offset: 0x024 (R/W)  System Handler Control and State Register */
  __IOM uint32_t CFSR;                /*!< Offset: 0x028 (R/W)  Configurable Fault Status Register */
  __IOM uint32_t HFSR;                /*!< Offset: 0x02C (R/W)  HardFault Status Register */
  __IOM uint32_t DFSR;                /*!< Offset: 0x030 (R/W)  Debug Fault Status Register */
  __IOM uint32_t MMFAR;                /*!< Offset: 0x034 (R/W)  MemManage Fault Address Register */
  __IOM uint32_t BFAR;                /*!< Offset: 0x038 (R/W)  BusFault Address Register */
  __IOM uint32_t AFSR;                /*!< Offset: 0x03C (R/W)  Auxiliary Fault Status Register */
  __IM  uint32_t PFR[2U];             /*!< Offset: 0x040 (R/ )  Processor Feature Register */
  __IM  uint32_t DFR;                   /*!< Offset: 0x048 (R/ )  Debug Feature Register */
  __IM  uint32_t ADR;                   /*!< Offset: 0x04C (R/ )  Auxiliary Feature Register */
  __IM  uint32_t MMFR[4U];             /*!< Offset: 0x050 (R/ )  Memory Model Feature Register */
  __IM  uint32_t ISAR[5U];             /*!< Offset: 0x060 (R/ )  Instruction Set Attributes Register */
      uint32_t RESERVED0[5U];
  __IOM uint32_t CPACR;                /*!< Offset: 0x088 (R/W)  Coprocessor Access Control Register */
} SCB_Type;

log打印输出：
[HalHwiInit] g_hwiForm = 20000178
[HalHwiInit] SCB->VTOR = 20000100

作者: momo_qu 时间: 2021-11-5 15:10
通过验证，发现寄存器值需要128字节对齐才可以设置，问题解决

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