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 */
/**
\briefStructure type to access the System Control Block (SCB).
*/
typedef struct
{
__IMuint32_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_tSHP; /*!< 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 */
__IMuint32_t PFR; /*!< Offset: 0x040 (R/ )Processor Feature Register */
__IMuint32_t DFR; /*!< Offset: 0x048 (R/ )Debug Feature Register */
__IMuint32_t ADR; /*!< Offset: 0x04C (R/ )Auxiliary Feature Register */
__IMuint32_t MMFR; /*!< Offset: 0x050 (R/ )Memory Model Feature Register */
__IMuint32_t ISAR; /*!< Offset: 0x060 (R/ )Instruction Set Attributes Register */
uint32_t RESERVED0;
__IOM uint32_t CPACR; /*!< Offset: 0x088 (R/W)Coprocessor Access Control Register */
} SCB_Type;
log打印输出：
g_hwiForm = 20000178
SCB->VTOR = 20000100
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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