;//HeapSize(inBytes)<0x0-0xFFFFFFFF:8>

;//

Heap_SizeEQU0x00000020;//定义堆空间大小

AREAHEAP,NOINIT,READWRITE,ALIGN=3;//定义一个数据段，8字节对齐

__heap_base

Heap_MemSPACEHeap_Size;//保留Heap_Size的堆空间

__heap_limit;//标号，代表堆末尾地址，后面有用

PRESERVE8;//指示编译器8字节对齐

THUMB;//指示编译器为THUMB指令

;VectorTableMappedtoAddress0atReset

AREARESET,DATA,READONLY;//定义只读数据段，其实放在CODE区，位于0地址

EXTERNNMIExcepTIon

EXTERNHardFaultExcepTIon

EXTERNMemManageExcepTIon

EXTERNBusFaultExcepTIon

EXTERNUsageFaultException

EXTERNSVCHandler

EXTERNDebugMonitor

EXTERNPendSVC

EXTERNSysTickHandler;//声明这些符号在外部定义，同C

;//在××it.c中实现这些函数，中断就能自动调用了

EXPORT__Vectors

__VectorsDCD__initial_sp;TopofStack//Cotex-M要求此处为堆栈顶部地址

DCDReset_Handler;ResetHandler

DCDNMIException;NMIHandler

DCDHardFaultException;HardFaultHandler

DCDMemManageException;MPUFaultHandler

DCDBusFaultException;BusFaultHandler

DCDUsageFaultException;UsageFaultHandler

DCD0;Reserved

DCD0;Reserved

DCD0;Reserved

DCD0;Reserved

DCDSVCHandler;SVCallHandler

DCDDebugMonitor;DebugMonitorHandler

DCD 0 ; Reserved