;******************** (C) COPYRIGHT 2009 STMicroelectronics ******************** ;* File Name : startup_stm32f10x_hd.s ;文件名 ;* Author : MCD Application Team ;* Version : V3.0.0 ;版本号 ;* Date : 04/06/2009
;* Description : STM32F10x High Density Devices vector table for RVMDK
;* toolchain. ;此文件为 STM32F10x高密度设备MDK工具链的启动文件
;* This module performs: ;该模块执行以下操作 ;* - Set the initial SP ;设置初始化堆栈指针（SP） ;* - Set the initial PC == Reset_Handler ;设置初始化程序计数器(PC)为复位向量，并在执行main函数前初始化系统时钟
;* - Set the vector table entries with the exceptions ISR address ;设置向量表入口为异常事件的入口地址
;* - Configure 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. ;复位之后处理器为线程模式，优先级为特权级，堆栈设置为MSP主堆栈 ;* <<< 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 ;
;
Stack_Size EQU 0x00000200 ;定义堆栈大小
AREA STACK, NOINIT, READWRITE, ALIGN=3 ;堆栈段，未初始化，允许读写，8字节边界对齐 ;说明: Cortex-M3的指令地址要求是字边界对齐（4字节）；但是代码段是8字节边界对齐的 Stack_Mem SPACE Stack_Size ;分配堆栈空间，把首地址赋值给Stack_Mem __initial_sp ;初始化堆栈指针，指向堆栈顶。
__initial_spTop EQU 0x20000400 ; stack used for SystemInit_ExtMemCtl
; always internal RAM used ;
;
Heap_Size EQU 0x00000000 ;定义堆得大小
AREA HEAP, NOINIT, READWRITE, ALIGN=3 ;堆段,未初始化,允许读写,堆数据段8字节边界对齐 __heap_base
Heap_Mem SPACE Heap_Size ;分配栈的空间 __heap_limit ;与__heap_base配合限制堆栈的大小
PRESERVE8 ;命令指定当前文件保持栈的8字节对齐 THUMB ;指令集，THUMB 必须位于使用新语法的任何 Thumb代码之前
; EXPORT 命令声明一个符号，由于链接器用于解释各个目标和库文件中的符号引用，相当于声明全局变量。GLOBAL与EXPORT相同 ; Vector Table Mapped to Address 0 at Reset ;以下为向量表，在复位时被映射到FLASH的0地址
AREA RESET, DATA, READONLY ;复位段，只包含数据，只读 EXPORT __Vectors ;符号输出，中断向量表开始 EXPORT __Vectors_End ;中断向量表结束 EXPORT __Vectors_Size ;中断向量表大小
;DCD 命令分配一个或多个字的存储器，在四个字节的边界上对齐，并定义存储器的运行时初值。
__Vectors DCD __initial_spTop ; Top of Stack 栈顶指针，被放在向量表的开始，FLASH的0地址，复位后首先装载栈顶指针
DCD Reset_Handler ; Reset Handler 复位异常，装载完栈顶后，第一个执行的，并且不返回。
DCD NMI_Handler ; NMI Handler 不可屏蔽中断
DCD HardFault_Handler ; Hard Fault Handler 意见错误中断
DCD MemManage_Handler ; MPU Fault Handler 内存管理错误中断
DCD BusFault_Handler ; Bus Fault Handler 总线错误中断，一般发生在数据访问异常，比如fsmc访问不当
DCD UsageFault_Handler ; Usage Fault Handler 用法错误中断，一般是预取值，或者位置指令，数据处理等错误
DCD 0 ; Reserved 保留 DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved
DCD SVC_Handler ; SVCall Handler 系统调用异常，主要是为了调用操作系统内核服务
DCD DebugMon_Handler ; Debug Monitor Handler 调试监视异常
DCD 0 ; Reserved DCD PendSV_Handler ; PendSV Handler 挂起异常，此处可以看见用作了uCOS-II的上下文切换异常，这是被推荐 ;使用的，因为Cortex-M3会在异常发生时自动保存R0-R3，R12,R13(堆栈指针SP)， ;R14(链接地址，也叫返回地址LR，在异常返回时使用)，R15（程序计数器PC，为当前 ;应用程序+4）和中断完成时自动回复，我们只需保存R4-R11,大大减少了中断响应和 ;上下文切换的时间。 ;说明：此处涉及到一个中断保存寄存器问题：因为在所有的运行模式下，未分组 ;寄存器都指向同一个物理寄存器，他们未被系统用作特殊的用途，因此，在中断或 ;者异常处理进行模式转换时，由于不同模式（此处为\线程\和\特权\）均使用相同 ;的物理寄存器，可能会造成寄存器中数据的破坏。这也是常说的\关键代码段\
;和\临界区\保护的原因。 DCD SysTick_Handler ; SysTick Handler 嘀嗒定时器，为操作系统内核时钟
; External Interrupts 以下为外部中断向量表 DCD WWDG_IRQHandler ; Window Watchdog
DCD PVD_IRQHandler ; PVD through EXTI Line detect DCD TAMPER_IRQHandler ; Tamper CAN1 TX
CAN1 RX0
Commutation
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 DCD USB_LP_CAN1_RX0_IRQHandler ; USB Low Priority or 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 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 ;向量表结束标志
__Vectors_Size EQU __Vectors_End - __Vectors ;计算向量表地址空间大小 ;|.text|用于表示由C编译程序产生的代码段，或用于以某种方式一C库关联的代码段。
AREA |.text|, CODE, READONLY ;定义C编译器源代码的代码段，只读
; Dummy SystemInit_ExtMemCtl function SystemInit_ExtMemCtl PROC
EXPORT SystemInit_ExtMemCtl [WEAK] BX LR ENDP ; Reset handler routine Reset_Handler PROC
EXPORT Reset_Handler [WEAK] ;此处[WEAK]表
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