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在STM32中用到了Cortex-M3定義的三組寄存器，有關這三組寄存器的說明不在STM32的技術手冊中，需要參考ARM公司發(fā)布的Cortex-M3 Technical Reference Manual (r2p0)。 在STM32的固件庫中定義了三個結(jié)構(gòu)體與這三個寄存器組相對應，這三個結(jié)構(gòu)體與ARM手冊中寄存器的對應關系如下： 一、NVIC寄存器組 STM32的固件庫中有如下定義： typedef struct { vu32 ISER[2]; u32 RESERVED0[30]; vu32 ICER[2]; u32 RSERVED1[30]; vu32 ISPR[2]; u32 RESERVED2[30]; vu32 ICPR[2]; u32 RESERVED3[30]; vu32 IABR[2]; u32 RESERVED4[62]; vu32 IPR[11]; } NVIC_TypeDef; 它們對應ARM手冊中的名稱為 ISER = Interrupt Set-Enable Registers ICER = Interrupt Clear-Enable Registers ISPR = Interrupt Set-Pending Register ICPR = Interrupt Clear-Pending Register IABR = Active Bit Register IPR = Interrupt Priority Registers 每個寄存器有240位，以Interrupt Set-Enable Registers說明，ISER[0]對應中斷源0~31，ISER[1]對應中斷源32~63，STM32只有60個中斷源，所以沒有ISER[2:7]。 參考STM32技術參考手冊中的中斷向量表，中斷源的位置為： 位置0 - WWDG = Window Watchdog interrupt 位置1 - PVD = PVD through EXTI Line detection interrupt 位置2 - TAMPER = Tamper interrupt ...... 位置58 - DMA2_Channel3 = DMA2 Channel3 global interrupt 位置59 - DMA2_Channel4_5 = DMA2 Channel4 and DMA2 Channel5 global interrupts 二、系統(tǒng)控制寄存器組 STM32的固件庫中有如下定義： typedef struct { vuc32 CPUID; vu32 ICSR; vu32 VTOR; vu32 AIRCR; vu32 SCR; vu32 CCR; vu32 SHPR[3]; vu32 SHCSR; vu32 CFSR; vu32 HFSR; vu32 DFSR; vu32 MMFAR; vu32 BFAR; vu32 AFSR; } SCB_TypeDef; /* System Control Block Structure */ 它們對應ARM手冊中的名稱為 CPUID = CPUID Base Register ICSR = Interrupt Control State Register VTOR = Vector Table Offset Register AIRCR = Application Interrupt/Reset Control Register SCR = System Control Register CCR = Configuration Control Register SHPR = System Handlers Priority Register SHCSR = System Handler Control and State Register CFSR = Configurable Fault Status Registers HFSR = Hard Fault Status Register DFSR = Debug Fault Status Register MMFAR = Mem Manage Address Register BFAR = Bus Fault Address Register AFSR = Auxiliary Fault Status Register 三、系統(tǒng)時鐘寄存器組 STM32的固件庫中有如下定義： typedef struct { vu32 CTRL; vu32 LOAD; vu32 VAL; vuc32 CALIB; } SysTick_TypeDef; 它們對應ARM手冊中的名稱為 CTRL = SysTick Control and Status Register LOAD = SysTick Reload Value Register VAL = SysTick Current Value Register CALIB = SysTick Calibration Value Register 最初發(fā)表日期：2008-7-28 |
