stm32笔记:启动代码startup_stm32f10x_hd.s注解(1)stm32笔记:启动代码s

;******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
;* File Name :startup_stm32f10x_hd.s
;* Author : MCD Application Team
;* Version : V3.4.0
;* Date : 10/15/2010

Stack_Size EQU 0x00000400 //定义1KB大小的栈空间

AREA STACK, NOINIT, READWRITE, ALIGN=3 //定义一个段,8(2的3次方)字节对齐 的空间作为栈
Stack_Mem SPACE Stack_Size //开辟栈大小1KB,并用0填充
__initial_sp //标记栈顶地址

Heap_Size EQU 0x00000200 //定义堆大小512字节

AREA HEAP, NOINIT, READWRITE, ALIGN=3 //定义堆空间,8字节对齐
__heap_base //堆空间基址
Heap_Mem SPACE Heap_Size //开辟堆空间512字节,并清0
__heap_limit //堆空间结束地址

PRESERVE8 //设置这个文件告诉编译器链接时堆栈是8字节对齐
THUMB //开始使用thumb指令模式

; Vector Table Mapped to Address 0 at Reset 复位后,中断向量表映射到地址0
AREA RESET, DATA, READONLY //定义名为RESET的只读段,这个名称最好不要乱改,不分大小写,
EXPORT __Vectors //声明全局符号,表示中断向量表入口地址
EXPORT __Vectors_End //中断向量表结束地址
EXPORT __Vectors_Size //大小

__Vectors DCD __initial_sp ; Top of Stack 栈顶地址
DCD Reset_Handler ; Reset Handler 复位中断的函数指针
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 以上都是内核中断

; External Interrupts 第16个开始是外设的中断
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 ;以上即中断函数指针数组

__Vectors_Size EQU __Vectors_End - __Vectors ;计算中断向量表长度

AREA |.text|, CODE, READONLY ;定义只读代码段

; Reset handler ;复位中断服务的入口
Reset_Handler PROC ;PROC_ENDP是一个函数的开始与结束标记
EXPORT Reset_Handler [WEAK];声明复位中断向量为全局的,可供外部调用,WEAK标记本代码是备用编译
IMPORT __main ;导入c库中的main标号,这个是c库中的内容,不是我们自己写的那个main函数
IMPORT SystemInit ;导入SystemInit
LDR R0, =SystemInit
BLX R0 ;跳到SystemInit
LDR R0, =__main ;装载链接器添加的_mian代码,用来进行flash到ram的存储器映射与数据段拷贝并清0
BX R0 ;它还执行了lib_init等c库的初始化工作,完了之后再进入用户的mian函数
ENDP

; Dummy Exception Handlers (infinite loops which can be modified)

NMI_Handler PROC
EXPORT NMI_Handler [WEAK]
B . ;weak标记说明,如果使用这个备用的函数(外部文件中没有NMI_Handler),这里的B指令用nop替换,
ENDP ;也就是说让编译器忽略,外部找不到任何NMI_Handler函数时的警告或错误
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