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stm32专题四:启动文件分析

作者:互联网

stm32的启动文件startup_stm32f10x_hd.s主要包含以下6个部分:

  1. 分配栈,包括大小和栈顶地址(不初始化);
  2. 分配堆,包括大小和堆起始地址(不初始化);
  3. 初始化中断向量表,将栈顶地址初始化为FLASH的0地址,复位程序为0X04地址,并将程序计数器指针PC指向复位程序0X04;
  4. 复位程序;
  5. 中断服务程序;
  6. 初始化1和2分配的堆栈;

以下是启动文件:

;******************** (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
;*                      - 初始化堆栈指针SP

;*                      - Set the initial PC == Reset_Handler
;*                      - 初始化PC指针 == Reset_Handler复位程序,上电复位后的第一个程序

;*                      - Set the vector table entries with the exceptions ISR address
;*                      - 以规定的ISR(中断服务请求)地址来设置中断向量表

;*                      - 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)
;*                      - 配置系统时钟,配置挂载到stm32板上的外部SRAM(可选项)

;*                      - Branches to __main in the C library (which eventually
;*                        calls main()).
;*                      - 调用Ck库函数 __main,去到C的世界

;*                      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.
;*******************************************************************************


; 1-栈
; Amount of memory (in bytes) allocated for Stack
; 为堆栈分配内存,以字节为单位

; Tailor this value to your application needs
; 可以根据需要修改栈的大小

; <h> Stack Configuration
; 配置栈(栈就是一块内存):变量(局部/全局),函数调用

;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Stack_Size      EQU     0x00000400
; 定义栈大小 1024字节(1KB)

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
;               告诉编译器汇编一个数据段,段名为STACK,不初始化,可读可写,8字节对齐

Stack_Mem       SPACE   Stack_Size
;               分配内存空间,单位字节,大小为Stack_Size
__initial_sp
; 栈顶地址


; 2-堆
; <h> Heap Configuration
; 配置堆,主要用于动态内存分配,malloc()

;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Heap_Size       EQU     0x00000200
; 512字节

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit
; 堆起始地址

                PRESERVE8   ; 当前堆栈以8字节对齐
                THUMB       ; 兼容THUMB指令集,THUMB是16位指令集,现在使用的THUMB-2是32位指令


; 3-中断向量表
; Vector Table Mapped to Address 0 at Reset
; 初始化中断向量表,向量表在复位时映射到地址0

                AREA    RESET, DATA, READONLY
;               汇编一个数据段,属性只读

                EXPORT  __Vectors       
;               向量表起始地址

                EXPORT  __Vectors_End
;               向量表结束地址

                EXPORT  __Vectors_Size

__Vectors       DCD     __initial_sp               ; Top of Stack
;               把栈顶地址初始化成向量表的起始地址,解释如下:
;               向量表从FLASH的0地址开始放置,以4个字节为一个单位,地址0存放的是栈
;               顶地址,0X04存放的是复位程序的地址,以此类推。从代码上看,向量表中存放
;               的都是中断服务函数的函数名,可我们知道C语言中的函数名就是一个地址。      

                DCD     Reset_Handler              ; Reset Handler
;               初始化复位程序地址,地址0X04

                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
; 至此,向量表分配完成。


; 4-复位程序
;               开始进行复位程序,定义一个只读的代码段
                AREA    |.text|, CODE, READONLY
                
; Reset handler
Reset_Handler   PROC
; 定义子程序,与ENDP成对使用,表示子程序的开始和结束

                EXPORT  Reset_Handler             [WEAK]
;               声明全局属性,弱定义

                IMPORT  __main
;               相当于c中的extern,从外部寻找一个__main函数

                IMPORT  SystemInit
;               寻找一个SystemInit系统时钟初始化函数

                LDR     R0, =SystemInit
;               把SystemInit函数地址加载到R0寄存器

                BLX     R0   
;               跳转到R0地址去执行函数   

                LDR     R0, =__main
                BX      R0
;               加载 + 执行__main函数
                ENDP
; 至此复位函数完成


; 5-中断服务程序
; Dummy Exception Handlers (infinite loops which can be modified)
; 空的异常处理程序(无限循环),可以修改

NMI_Handler     PROC
;               PROC和ENDP定义了一个子程序
                EXPORT  NMI_Handler                [WEAK]
;               声明全局属性,弱定义
                B       .
;               跳转到无限循环,B为跳转指令,·为无限循环
                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

; 6-堆栈的初始化
;*******************************************************************************
; User Stack and Heap initialization
;*******************************************************************************
                 IF      :DEF:__MICROLIB
;                在IDE(mdk)中定义
                
                 EXPORT  __initial_sp
                 EXPORT  __heap_base
                 EXPORT  __heap_limit
;                把栈顶地址,堆起始地址等声明为具有全局属性,供IDE调用
                
                 ELSE
                
                 IMPORT  __use_two_region_memory    ; 由用户自己实现

                 EXPORT  __user_initial_stackheap
;                执行__user_initial_stackheap(用户初始化堆栈函数)
                 
__user_initial_stackheap
;                初始化堆栈

                 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*****

 

标签:IRQHandler,专题,启动,DCD,WEAK,stm32,DMA1,Handler,EXPORT
来源: https://blog.csdn.net/dingyc_ee/article/details/97615084