This section describes the C declarations that are used in the examples described in this appendix.The C declarations are:

/* C Declarations to support example code */

typedef unsigned int   UINT32;

/* Access 32-bit memory-mapped registers */#define GET_UINT32(address, pData) (*(pData) = *((volatile UINT32 *)(address)))

#define PUT_UINT32(address, data)  (*((volatile UINT32 *)(address)) = (data))

/* Barrier operations defined using compiler intrinsics */

#define DataMemoryBarrier()                 __dmb(0xF)        /* DMB */

#define DataSynchronizationBarrier()        __dsb(0xF)        /* DSB */

#define InstructionSynchronizationBarrier() __isb(0xF)        /* ISB */

/* Global interrupt enable operations on PRIMASK using compiler intrinsics */

#define DisableInterrupts()                 __disable_irq()  /* CPSID I */

#define EnableInterrupts()                  __enable_irq()   /* CPSIE I */

/* SCS and NVIC register addresses */

#define CORTEXM1_SYSTICK_CSR          0xE000E010

#define CORTEXM1_SYSTICK_RELOAD       0xE000E014

#define CORTEXM1_SYSTICK_CURRENT      0xE000E018

#define CORTEXM1_NVIC_IRQ_SET_ENABLE  0xE000E100

#define CORTEXM1_NVIC_IRQ_CLR_ENABLE  0xE000E180

#define CORTEXM1_NVIC_IRQ_SET_PENDING 0xE000E200

#define CORTEXM1_NVIC_IRQ_CLR_PENDING 0xE000E280

#define CORTEXM1_SCB_ICS              0xE000ED04

#define CORTEXM1_SCB_SHPR3            0xE000ED20