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Cortex-M3 (NXP LPC1788)之启动代码分析

时间：11-19 来源：互联网 点击：
在Keil uVision4中新建一个基于NXP1788的工程后，会提示添加启动汇编代码startup_LPC177x_8x.S。该文件进行从汇编到C语言运行环境的初始化工作。

  1. ;/*****************************************************************************
  2. ;*@file:startup_LPC177x_8x.s
  3. ;*@purpose:CMSISCortex-M3CoreDeviceStartupFile
  4. ;*fortheNXPLPC177x_8xDeviceSeries
  5. ;*@version:V1.20
  6. ;*@date:07.October2010
  7. ;*------->>------------------
  8. ;*
  9. ;*Copyright(C)2010ARMLimited.Allrightsreserved.
  10. ;*ARMLimited(ARM)issupplyingthissoftwareforusewithCortex-M3
  11. ;*processorbasedmicrocontrollers.Thisfilecanbefreelydistributed
  12. ;*withindevelopmenttoolsthataresupportingsuchARMbasedprocessors.
  13. ;*
  14. ;*THISSOFTWAREISPROVIDED"ASIS".NOWARRANTIES,WHETHEREXPRESS,IMPLIED
  15. ;*ORSTATUTORY,INCLUDING,BUTNOTLIMITEDTO,IMPLIEDWARRANTIESOF
  16. ;*MERCHANTABILITYANDFITNESSFORAPARTICULARPURPOSEAPPLYTOTHISSOFTWARE.
  17. ;*ARMSHALLNOT,INANYCIRCUMSTANCES,BELIABLEFORSPECIAL,INCIDENTAL,OR
  18. ;*CONSEQUENTIALDAMAGES,FORANYREASONWHATSOEVER.
  19. ;*
  20. ;*****************************************************************************/
  23. ;StackConfiguration
  24. ;StackSize(inBytes)<0x0-0xFFFFFFFF:8>
  25. ;
  27. Stack_SizeEQU0x00000200
  29. AREASTACK,NOINIT,READWRITE,ALIGN=3
  30. Stack_MemSPACEStack_Size
  31. __initial_sp
  34. ;HeapConfiguration
  35. ;HeapSize(inBytes)<0x0-0xFFFFFFFF:8>
  36. ;
  38. Heap_SizeEQU0x00000400
  40. AREAHEAP,NOINIT,READWRITE,ALIGN=3
  41. __heap_base
  42. Heap_MemSPACEHeap_Size
  43. __heap_limit
  46. PRESERVE8
  47. THUMB
  50. ;VectorTableMappedtoAddress0atReset
  52. AREARESET,DATA,READONLY
  53. EXPORT__Vectors
  55. __VectorsDCD__initial_sp;TopofStack
  56. DCDReset_Handler;ResetHandler
  57. DCDNMI_Handler;NMIHandler
  58. DCDHardFault_Handler;HardFaultHandler
  59. DCDMemManage_Handler;MPUFaultHandler
  60. DCDBusFault_Handler;BusFaultHandler
  61. DCDUsageFault_Handler;UsageFaultHandler
  62. DCD0;Reserved
  63. DCD0;Reserved
  64. DCD0;Reserved
  65. DCD0;Reserved
  66. DCDSVC_Handler;SVCallHandler
  67. DCDDebugMon_Handler;DebugMonitorHandler
  68. DCD0;Reserved
  69. DCDPendSV_Handler;PendSVHandler
  70. DCDSysTick_Handler;SysTickHandler
  72. ;ExternalInterrupts
  73. DCDWDT_IRQHandler;16:WatchdogTimer
  74. DCDTIMER0_IRQHandler;17:Timer0
  75. DCDTIMER1_IRQHandler;18:Timer1
  76. DCDTIMER2_IRQHandler;19:Timer2
  77. DCDTIMER3_IRQHandler;20:Timer3
  78. DCDUART0_IRQHandler;21:UART0
  79. DCDUART1_IRQHandler;22:UART1
  80. DCDUART2_IRQHandler;23:UART2
  81. DCDUART3_IRQHandler;24:UART3
  82. DCDPWM1_IRQHandler;25:PWM1
  83. DCDI2C0_IRQHandler;26:I2C0
  84. DCDI2C1_IRQHandler;27:I2C1
  85. DCDI2C2_IRQHandler;28:I2C2
  86. DCDSPIFI_IRQHandler;29:SPIFI
  87. DCDSSP0_IRQHandler;30:SSP0
  88. DCDSSP1_IRQHandler;31:SSP1
  89. DCDPLL0_IRQHandler;32:PLL0Lock(MainPLL)
  90. DCDRTC_IRQHandler;33:RealTimeClock
  91. DCDEINT0_IRQHandler;34:ExternalInterrupt0
  92. DCDEINT1_IRQHandler;35:ExternalInterrupt1
  93. DCDEINT2_IRQHandler;36:ExternalInterrupt2
  94. DCDEINT3_IRQHandler;37:ExternalInterrupt3
  95. DCDADC_IRQHandler;38:A/DConverter
  96. DCDBOD_IRQHandler;39:Brown-OutDetect
  97. DCDUSB_IRQHandler;40:USB
  98. DCDCAN_IRQHandler;41:CAN
  99. DCDDMA_IRQHandler;42:GeneralPurposeDMA
  100. DCDI2S_IRQHandler;43:I2S
  101. DCDENET_IRQHandler;44:Ethernet
  102. DCDMCI_IRQHandler;45:SD/MMCcardI/F
  103. DCDMCPWM_IRQHandler;46:MotorControlPWM
  104. DCDQEI_IRQHandler;47:QuadratureEncoderInterface
  105. DCDPLL1_IRQHandler;48:PLL1Lock(USBPLL)
  106. DCDUSBActivity_IRQHandler;49:USBActivityinterrupttowakeup
  107. DCDCANActivity_IRQHandler;50:CANActivityinterrupttowakeup
  108. DCDUART4_IRQHandler;51:UART4
  109. DCDSSP2_IRQHandler;52:SSP2
  110. DCDLCD_IRQHandler;53:LCD
  111. DCDGPIO_IRQHandler;54:GPIO
  112. DCDPWM0_IRQHandler;55:PWM0
  113. DCDEEPROM_IRQHandler;56:EEPROM
  116. IF:LNOT::DEF:NO_CRP
  117. AREA|.ARM.__at_0x02FC|,CODE,READONLY
  118. CRP_KeyDCD0xFFFFFFFF
  119. ENDIF
  122. AREA|.text|,CODE,READONLY
  125. ;ResetHandler
  127. Reset_HandlerPROC
  128. EXPORTReset_Handler[WEAK]
  129. IMPORTSystemInit
  130. IMPORT__main
  131. LDRR0,=SystemInit
  132. BLXR0
  133. LDRR0,=__main
  134. BXR0
  135. ENDP
  138. ;DummyExceptionHandlers(infiniteloopswhichcanbemodified)
  140. NMI_HandlerPROC
  141. EXPORTNMI_Handler[WEAK]
  142. B.
  143. ENDP
  144. HardFault_Handler\
  145. PROC
  146. EXPORTHardFault_Handler[WEAK]
  147. B.
  148. ENDP
  149. MemManage_Handler\
  150. PROC
  151. EXPORTMemManage_Handler[WEAK]
  152. B.
  153. ENDP

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