STM32(六)启动文件解析

 

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;******************** (C) COPYRIGHT 2011 STMicroelectronics ******************** ;* File Name          : startup_stm32f10x_hd.s ;* Author             : MCD Application Team ;* Version            : V3.5.0 ;* Date               : 11-March-2011 ;* Description        : STM32F10x High Density Devices vector table for MDK-ARM ;*                      toolchain. ;*                      This module performs: ;*                      - Set the initial SP ;*                      - Set the initial PC == Reset_Handler ;*                      - Set the vector table entries with the exceptions ISR address ;*                      - Configure the clock system and also configure the external ;*                        SRAM mounted on STM3210E-EVAL board to be used as data ;*                        memory (optional, to be enabled by user) ;*                      - Branches to __main in the C library (which eventually ;*                        calls main()). ;*                      After Reset the CortexM3 processor is in Thread mode, ;*                      priority is Privileged, and the Stack is set to Main. ;* <<< Use Configuration Wizard in Context Menu >>>   ;******************************************************************************* ; THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS ; WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. ; AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, ; INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE ; CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING ; INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. ;*******************************************************************************   ; Amount of memory (in bytes) allocated for Stack ; Tailor this value to your application needs ; <h> Stack Configuration ;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h>   Stack_Size      EQU     0x00000400                   AREA    STACK, NOINIT, READWRITE, ALIGN=3 Stack_Mem       SPACE   Stack_Size __initial_sp                                                     ; <h> Heap Configuration ;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h>   Heap_Size       EQU     0x00000200                   AREA    HEAP, NOINIT, READWRITE, ALIGN=3 __heap_base Heap_Mem        SPACE   Heap_Size __heap_limit                   PRESERVE8                 THUMB     ; Vector Table Mapped to Address 0 at Reset                 AREA    RESET, DATA, READONLY                 EXPORT  __Vectors                 EXPORT  __Vectors_End                 EXPORT  __Vectors_Size   __Vectors       DCD     __initial_sp               ; Top of Stack                 DCD     Reset_Handler              ; Reset Handler                 DCD     NMI_Handler                ; NMI Handler                 DCD     HardFault_Handler          ; Hard Fault Handler                 DCD     MemManage_Handler          ; MPU Fault Handler                 DCD     BusFault_Handler           ; Bus Fault Handler                 DCD     UsageFault_Handler         ; Usage Fault Handler                 DCD     0                          ; Reserved                 DCD     0                          ; Reserved                 DCD     0                          ; Reserved                 DCD     0                          ; Reserved                 DCD     SVC_Handler                ; SVCall Handler                 DCD     DebugMon_Handler           ; Debug Monitor Handler                 DCD     0                          ; Reserved                 DCD     PendSV_Handler             ; PendSV Handler                 DCD     SysTick_Handler            ; SysTick Handler                   ; External Interrupts                 DCD     WWDG_IRQHandler            ; Window Watchdog                 DCD     PVD_IRQHandler             ; PVD through EXTI Line detect                 DCD     TAMPER_IRQHandler          ; Tamper                 DCD     RTC_IRQHandler             ; RTC                 DCD     FLASH_IRQHandler           ; Flash                 DCD     RCC_IRQHandler             ; RCC                 DCD     EXTI0_IRQHandler           ; EXTI Line 0                 DCD     EXTI1_IRQHandler           ; EXTI Line 1                 DCD     EXTI2_IRQHandler           ; EXTI Line 2                 DCD     EXTI3_IRQHandler           ; EXTI Line 3                 DCD     EXTI4_IRQHandler           ; EXTI Line 4                 DCD     DMA1_Channel1_IRQHandler   ; DMA1 Channel 1                 DCD     DMA1_Channel2_IRQHandler   ; DMA1 Channel 2                 DCD     DMA1_Channel3_IRQHandler   ; DMA1 Channel 3                 DCD     DMA1_Channel4_IRQHandler   ; DMA1 Channel 4                 DCD     DMA1_Channel5_IRQHandler   ; DMA1 Channel 5                 DCD     DMA1_Channel6_IRQHandler   ; DMA1 Channel 6                 DCD     DMA1_Channel7_IRQHandler   ; DMA1 Channel 7                 DCD     ADC1_2_IRQHandler          ; ADC1 & ADC2                 DCD     USB_HP_CAN1_TX_IRQHandler  ; USB High Priority or CAN1 TX                 DCD     USB_LP_CAN1_RX0_IRQHandler ; USB Low  Priority or CAN1 RX0                 DCD     CAN1_RX1_IRQHandler        ; CAN1 RX1                 DCD     CAN1_SCE_IRQHandler        ; CAN1 SCE                 DCD     EXTI9_5_IRQHandler         ; EXTI Line 9..5                 DCD     TIM1_BRK_IRQHandler        ; TIM1 Break                 DCD     TIM1_UP_IRQHandler         ; TIM1 Update                 DCD     TIM1_TRG_COM_IRQHandler    ; TIM1 Trigger and Commutation                 DCD     TIM1_CC_IRQHandler         ; TIM1 Capture Compare                 DCD     TIM2_IRQHandler            ; TIM2                 DCD     TIM3_IRQHandler            ; TIM3                 DCD     TIM4_IRQHandler            ; TIM4                 DCD     I2C1_EV_IRQHandler         ; I2C1 Event                 DCD     I2C1_ER_IRQHandler         ; I2C1 Error                 DCD     I2C2_EV_IRQHandler         ; I2C2 Event                 DCD     I2C2_ER_IRQHandler         ; I2C2 Error                 DCD     SPI1_IRQHandler            ; SPI1                 DCD     SPI2_IRQHandler            ; SPI2                 DCD     USART1_IRQHandler          ; USART1                 DCD     USART2_IRQHandler          ; USART2                 DCD     USART3_IRQHandler          ; USART3                 DCD     EXTI15_10_IRQHandler       ; EXTI Line 15..10                 DCD     RTCAlarm_IRQHandler        ; RTC Alarm through EXTI Line                 DCD     USBWakeUp_IRQHandler       ; USB Wakeup from suspend                 DCD     TIM8_BRK_IRQHandler        ; TIM8 Break                 DCD     TIM8_UP_IRQHandler         ; TIM8 Update                 DCD     TIM8_TRG_COM_IRQHandler    ; TIM8 Trigger and Commutation                 DCD     TIM8_CC_IRQHandler         ; TIM8 Capture Compare                 DCD     ADC3_IRQHandler            ; ADC3                 DCD     FSMC_IRQHandler            ; FSMC                 DCD     SDIO_IRQHandler            ; SDIO                 DCD     TIM5_IRQHandler            ; TIM5                 DCD     SPI3_IRQHandler            ; SPI3                 DCD     UART4_IRQHandler           ; UART4                 DCD     UART5_IRQHandler           ; UART5                 DCD     TIM6_IRQHandler            ; TIM6                 DCD     TIM7_IRQHandler            ; TIM7                 DCD     DMA2_Channel1_IRQHandler   ; DMA2 Channel1                 DCD     DMA2_Channel2_IRQHandler   ; DMA2 Channel2                 DCD     DMA2_Channel3_IRQHandler   ; DMA2 Channel3                 DCD     DMA2_Channel4_5_IRQHandler ; DMA2 Channel4 & Channel5 __Vectors_End   __Vectors_Size  EQU  __Vectors_End - __Vectors                   AREA    |.text|, CODE, READONLY                   ; Reset handler Reset_Handler   PROC                 EXPORT  Reset_Handler             [WEAK]                 IMPORT  __main                 IMPORT  SystemInit                 LDR     R0, =SystemInit                 BLX     R0                               LDR     R0, =__main                 BX      R0                 ENDP                   ; Dummy Exception Handlers (infinite loops which can be modified)   NMI_Handler     PROC                 EXPORT  NMI_Handler                [WEAK]                 B       .                 ENDP HardFault_Handler\                 PROC                 EXPORT  HardFault_Handler          [WEAK]                 B       .                 ENDP MemManage_Handler\                 PROC                 EXPORT  MemManage_Handler          [WEAK]                 B       .                 ENDP BusFault_Handler\                 PROC                 EXPORT  BusFault_Handler           [WEAK]                 B       .                 ENDP UsageFault_Handler\                 PROC                 EXPORT  UsageFault_Handler         [WEAK]                 B       .                 ENDP SVC_Handler     PROC                 EXPORT  SVC_Handler                [WEAK]                 B       .                 ENDP DebugMon_Handler\                 PROC                 EXPORT  DebugMon_Handler           [WEAK]                 B       .                 ENDP PendSV_Handler  PROC                 EXPORT  PendSV_Handler             [WEAK]                 B       .                 ENDP SysTick_Handler PROC                 EXPORT  SysTick_Handler            [WEAK]                 B       .                 ENDP   Default_Handler PROC                   EXPORT  WWDG_IRQHandler            [WEAK]                 EXPORT  PVD_IRQHandler             [WEAK]                 EXPORT  TAMPER_IRQHandler          [WEAK]                 EXPORT  RTC_IRQHandler             [WEAK]                 EXPORT  FLASH_IRQHandler           [WEAK]                 EXPORT  RCC_IRQHandler             [WEAK]                 EXPORT  EXTI0_IRQHandler           [WEAK]                 EXPORT  EXTI1_IRQHandler           [WEAK]                 EXPORT  EXTI2_IRQHandler           [WEAK]                 EXPORT  EXTI3_IRQHandler           [WEAK]                 EXPORT  EXTI4_IRQHandler           [WEAK]                 EXPORT  DMA1_Channel1_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel2_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel3_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel4_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel5_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel6_IRQHandler   [WEAK]                 EXPORT  DMA1_Channel7_IRQHandler   [WEAK]                 EXPORT  ADC1_2_IRQHandler          [WEAK]                 EXPORT  USB_HP_CAN1_TX_IRQHandler  [WEAK]                 EXPORT  USB_LP_CAN1_RX0_IRQHandler [WEAK]                 EXPORT  CAN1_RX1_IRQHandler        [WEAK]                 EXPORT  CAN1_SCE_IRQHandler        [WEAK]                 EXPORT  EXTI9_5_IRQHandler         [WEAK]                 EXPORT  TIM1_BRK_IRQHandler        [WEAK]                 EXPORT  TIM1_UP_IRQHandler         [WEAK]                 EXPORT  TIM1_TRG_COM_IRQHandler    [WEAK]                 EXPORT  TIM1_CC_IRQHandler         [WEAK]                 EXPORT  TIM2_IRQHandler            [WEAK]                 EXPORT  TIM3_IRQHandler            [WEAK]                 EXPORT  TIM4_IRQHandler            [WEAK]                 EXPORT  I2C1_EV_IRQHandler         [WEAK]                 EXPORT  I2C1_ER_IRQHandler         [WEAK]                 EXPORT  I2C2_EV_IRQHandler         [WEAK]                 EXPORT  I2C2_ER_IRQHandler         [WEAK]                 EXPORT  SPI1_IRQHandler            [WEAK]                 EXPORT  SPI2_IRQHandler            [WEAK]                 EXPORT  USART1_IRQHandler          [WEAK]                 EXPORT  USART2_IRQHandler          [WEAK]                 EXPORT  USART3_IRQHandler          [WEAK]                 EXPORT  EXTI15_10_IRQHandler       [WEAK]                 EXPORT  RTCAlarm_IRQHandler        [WEAK]                 EXPORT  USBWakeUp_IRQHandler       [WEAK]                 EXPORT  TIM8_BRK_IRQHandler        [WEAK]                 EXPORT  TIM8_UP_IRQHandler         [WEAK]                 EXPORT  TIM8_TRG_COM_IRQHandler    [WEAK]                 EXPORT  TIM8_CC_IRQHandler         [WEAK]                 EXPORT  ADC3_IRQHandler            [WEAK]                 EXPORT  FSMC_IRQHandler            [WEAK]                 EXPORT  SDIO_IRQHandler            [WEAK]                 EXPORT  TIM5_IRQHandler            [WEAK]                 EXPORT  SPI3_IRQHandler            [WEAK]                 EXPORT  UART4_IRQHandler           [WEAK]                 EXPORT  UART5_IRQHandler           [WEAK]                 EXPORT  TIM6_IRQHandler            [WEAK]                 EXPORT  TIM7_IRQHandler            [WEAK]                 EXPORT  DMA2_Channel1_IRQHandler   [WEAK]                 EXPORT  DMA2_Channel2_IRQHandler   [WEAK]                 EXPORT  DMA2_Channel3_IRQHandler   [WEAK]                 EXPORT  DMA2_Channel4_5_IRQHandler [WEAK]   WWDG_IRQHandler PVD_IRQHandler TAMPER_IRQHandler RTC_IRQHandler FLASH_IRQHandler RCC_IRQHandler EXTI0_IRQHandler EXTI1_IRQHandler EXTI2_IRQHandler EXTI3_IRQHandler EXTI4_IRQHandler DMA1_Channel1_IRQHandler DMA1_Channel2_IRQHandler DMA1_Channel3_IRQHandler DMA1_Channel4_IRQHandler DMA1_Channel5_IRQHandler DMA1_Channel6_IRQHandler DMA1_Channel7_IRQHandler ADC1_2_IRQHandler USB_HP_CAN1_TX_IRQHandler USB_LP_CAN1_RX0_IRQHandler CAN1_RX1_IRQHandler CAN1_SCE_IRQHandler EXTI9_5_IRQHandler TIM1_BRK_IRQHandler TIM1_UP_IRQHandler TIM1_TRG_COM_IRQHandler TIM1_CC_IRQHandler TIM2_IRQHandler TIM3_IRQHandler TIM4_IRQHandler I2C1_EV_IRQHandler I2C1_ER_IRQHandler I2C2_EV_IRQHandler I2C2_ER_IRQHandler SPI1_IRQHandler SPI2_IRQHandler USART1_IRQHandler USART2_IRQHandler USART3_IRQHandler EXTI15_10_IRQHandler RTCAlarm_IRQHandler USBWakeUp_IRQHandler TIM8_BRK_IRQHandler TIM8_UP_IRQHandler TIM8_TRG_COM_IRQHandler TIM8_CC_IRQHandler ADC3_IRQHandler FSMC_IRQHandler SDIO_IRQHandler TIM5_IRQHandler SPI3_IRQHandler UART4_IRQHandler UART5_IRQHandler TIM6_IRQHandler TIM7_IRQHandler DMA2_Channel1_IRQHandler DMA2_Channel2_IRQHandler DMA2_Channel3_IRQHandler DMA2_Channel4_5_IRQHandler                 B       .                   ENDP                   ALIGN   ;******************************************************************************* ; User Stack and Heap initialization ;*******************************************************************************                  IF      :DEF:__MICROLIB                                    EXPORT  __initial_sp                  EXPORT  __heap_base                  EXPORT  __heap_limit                                    ELSE                                    IMPORT  __use_two_region_memory                  EXPORT  __user_initial_stackheap                    __user_initial_stackheap                    LDR     R0, =  Heap_Mem                  LDR     R1, =(Stack_Mem + Stack_Size)                  LDR     R2, = (Heap_Mem +  Heap_Size)                  LDR     R3, = Stack_Mem                  BX      LR                    ALIGN                    ENDIF                    END   ;******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE*****

 

　　

 

启动文件是有汇编编写，是系统上电复位后第一个执行的程序。主要做了一下工作：

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1	1、初始化堆栈指针SP=_initial_sp.

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1	2、初始化PC指针=Reset_Handler.

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1	3、初始化中断向量表

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4、配置系统时钟

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1	5、调用C库函数_main初始化用户堆栈，从而调用main函数去到C语言的世界。