STM32启动文件-电子工程世界

;******************** (C) COPYRIGHT 2014 STMicroelectronics ********************
;* File Name : startup_stm32f40_41xxx.s
;* Author : MCD Application Team
;* @version : V1.4.0
;* @date : 04-August-2014
;* Description : STM32F40xxx/41xxx 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 system clock and the external SRAM mounted on
;* STM324xG-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 CortexM4 processor is in Thread mode,
;* priority is Privileged, and the Stack is set to Main.
;* <<< Use Configuration Wizard in Context Menu >>>
;*******************************************************************************
;
; Licensed under MCD-ST Liberty SW License Agreement V2, (the 'License');
; You may not use this file except in compliance with the License.
; You may obtain a copy of the License at:
;
;
;
; Unless required by applicable law or agreed to in writing, software
; distributed under the License is distributed on an 'AS IS' BASIS,
; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
; See the License for the specific language governing permissions and
; limitations under the License.
;
;*******************************************************************************

; Amount of memory (in bytes) allocated for Stack
; Tailor this value to your application needs
; Stack Configuration
;   Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
;

Stack_Size EQU 0x00000400

AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
__initial_sp

; Heap Configuration
;    Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
;

Heap_Size EQU 0x00000000 ;我们不使用MDK自带的malloc和free函数,所以设置这里为0.

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 detection
DCD TAMP_STAMP_IRQHandler ; Tamper and TimeStamps through the EXTI line
DCD RTC_WKUP_IRQHandler ; RTC Wakeup through the EXTI line
DCD FLASH_IRQHandler ; FLASH
DCD RCC_IRQHandler ; RCC
DCD EXTI0_IRQHandler ; EXTI Line0
DCD EXTI1_IRQHandler ; EXTI Line1
DCD EXTI2_IRQHandler ; EXTI Line2
DCD EXTI3_IRQHandler ; EXTI Line3
DCD EXTI4_IRQHandler ; EXTI Line4
DCD DMA1_Stream0_IRQHandler ; DMA1 Stream 0
DCD DMA1_Stream1_IRQHandler ; DMA1 Stream 1
DCD DMA1_Stream2_IRQHandler ; DMA1 Stream 2
DCD DMA1_Stream3_IRQHandler ; DMA1 Stream 3
DCD DMA1_Stream4_IRQHandler ; DMA1 Stream 4
DCD DMA1_Stream5_IRQHandler ; DMA1 Stream 5
DCD DMA1_Stream6_IRQHandler ; DMA1 Stream 6
DCD ADC_IRQHandler ; ADC1, ADC2 and ADC3s
DCD CAN1_TX_IRQHandler ; CAN1 TX
DCD CAN1_RX0_IRQHandler ; CAN1 RX0
DCD CAN1_RX1_IRQHandler ; CAN1 RX1
DCD CAN1_SCE_IRQHandler ; CAN1 SCE
DCD EXTI9_5_IRQHandler ; External Line[9:5]s
DCD TIM1_BRK_TIM9_IRQHandler ; TIM1 Break and TIM9
DCD TIM1_UP_TIM10_IRQHandler ; TIM1 Update and TIM10
DCD TIM1_TRG_COM_TIM11_IRQHandler ; TIM1 Trigger and Commutation and TIM11
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 ; External Line[15:10]s
DCD RTC_Alarm_IRQHandler ; RTC Alarm (A and B) through EXTI Line
DCD OTG_FS_WKUP_IRQHandler ; USB OTG FS Wakeup through EXTI line
DCD TIM8_BRK_TIM12_IRQHandler ; TIM8 Break and TIM12
DCD TIM8_UP_TIM13_IRQHandler ; TIM8 Update and TIM13
DCD TIM8_TRG_COM_TIM14_IRQHandler ; TIM8 Trigger and Commutation and TIM14
DCD TIM8_CC_IRQHandler ; TIM8 Capture Compare
DCD DMA1_Stream7_IRQHandler ; DMA1 Stream7
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_DAC_IRQHandler ; TIM6 and DAC1&2 underrun errors
DCD TIM7_IRQHandler ; TIM7
DCD DMA2_Stream0_IRQHandler ; DMA2 Stream 0
DCD DMA2_Stream1_IRQHandler ; DMA2 Stream 1
DCD DMA2_Stream2_IRQHandler ; DMA2 Stream 2
DCD DMA2_Stream3_IRQHandler ; DMA2 Stream 3
DCD DMA2_Stream4_IRQHandler ; DMA2 Stream 4
DCD ETH_IRQHandler ; Ethernet
DCD ETH_WKUP_IRQHandler ; Ethernet Wakeup through EXTI line
DCD CAN2_TX_IRQHandler ; CAN2 TX
DCD CAN2_RX0_IRQHandler ; CAN2 RX0
DCD CAN2_RX1_IRQHandler ; CAN2 RX1
DCD CAN2_SCE_IRQHandler ; CAN2 SCE
DCD OTG_FS_IRQHandler ; USB OTG FS
DCD DMA2_Stream5_IRQHandler ; DMA2 Stream 5
DCD DMA2_Stream6_IRQHandler ; DMA2 Stream 6
DCD DMA2_Stream7_IRQHandler ; DMA2 Stream 7
DCD USART6_IRQHandler ; USART6
DCD I2C3_EV_IRQHandler ; I2C3 event
DCD I2C3_ER_IRQHandler ; I2C3 error
DCD OTG_HS_EP1_OUT_IRQHandler ; USB OTG HS End Point 1 Out
DCD OTG_HS_EP1_IN_IRQHandler ; USB OTG HS End Point 1 In
DCD OTG_HS_WKUP_IRQHandler ; USB OTG HS Wakeup through EXTI
DCD OTG_HS_IRQHandler ; USB OTG HS
DCD DCMI_IRQHandler ; DCMI
DCD CRYP_IRQHandler ; CRYP crypto
DCD HASH_RNG_IRQHandler ; Hash and Rng
DCD FPU_IRQHandler ; FPU

__Vectors_End

__Vectors_Size EQU __Vectors_End - __Vectors

AREA |.text|, CODE, READONLY

; Reset handler
Reset_Handler PROC
EXPORT Reset_Handler [WEAK]
;IMPORT SystemInit ;寄存器代码,不需要在这里调用SystemInit函数,故屏蔽掉,库函数版本代码,可以留下
;不过需要在外部实现SystemInit函数,否则会报错.
IMPORT __main
LDR R0, =0xE000ED88 ; 使能浮点运算 CP10,CP11
LDR R1,[R0]
ORR R1,R1,#(0xF << 20)
STR R1,[R0]

;LDR R0, =SystemInit ;寄存器代码,未用到,屏蔽
;BLX R0 ;寄存器代码,未用到,屏蔽
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 TAMP_STAMP_IRQHandler [WEAK]
EXPORT RTC_WKUP_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_Stream0_IRQHandler [WEAK]
EXPORT DMA1_Stream1_IRQHandler [WEAK]
EXPORT DMA1_Stream2_IRQHandler [WEAK]
EXPORT DMA1_Stream3_IRQHandler [WEAK]
EXPORT DMA1_Stream4_IRQHandler [WEAK]
EXPORT DMA1_Stream5_IRQHandler [WEAK]
EXPORT DMA1_Stream6_IRQHandler [WEAK]
EXPORT ADC_IRQHandler [WEAK]
EXPORT CAN1_TX_IRQHandler [WEAK]
EXPORT CAN1_RX0_IRQHandler [WEAK]
EXPORT CAN1_RX1_IRQHandler [WEAK]
EXPORT CAN1_SCE_IRQHandler [WEAK]
EXPORT EXTI9_5_IRQHandler [WEAK]
EXPORT TIM1_BRK_TIM9_IRQHandler [WEAK]
EXPORT TIM1_UP_TIM10_IRQHandler [WEAK]
EXPORT TIM1_TRG_COM_TIM11_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 RTC_Alarm_IRQHandler [WEAK]
EXPORT OTG_FS_WKUP_IRQHandler [WEAK]
EXPORT TIM8_BRK_TIM12_IRQHandler [WEAK]
EXPORT TIM8_UP_TIM13_IRQHandler [WEAK]
EXPORT TIM8_TRG_COM_TIM14_IRQHandler [WEAK]
EXPORT TIM8_CC_IRQHandler [WEAK]
EXPORT DMA1_Stream7_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_DAC_IRQHandler [WEAK]
EXPORT TIM7_IRQHandler [WEAK]
EXPORT DMA2_Stream0_IRQHandler [WEAK]
EXPORT DMA2_Stream1_IRQHandler [WEAK]
EXPORT DMA2_Stream2_IRQHandler [WEAK]
EXPORT DMA2_Stream3_IRQHandler [WEAK]
EXPORT DMA2_Stream4_IRQHandler [WEAK]
EXPORT ETH_IRQHandler [WEAK]
EXPORT ETH_WKUP_IRQHandler [WEAK]
EXPORT CAN2_TX_IRQHandler [WEAK]
EXPORT CAN2_RX0_IRQHandler [WEAK]
EXPORT CAN2_RX1_IRQHandler [WEAK]
EXPORT CAN2_SCE_IRQHandler [WEAK]
EXPORT OTG_FS_IRQHandler [WEAK]
EXPORT DMA2_Stream5_IRQHandler [WEAK]
EXPORT DMA2_Stream6_IRQHandler [WEAK]
EXPORT DMA2_Stream7_IRQHandler [WEAK]
EXPORT USART6_IRQHandler [WEAK]
EXPORT I2C3_EV_IRQHandler [WEAK]
EXPORT I2C3_ER_IRQHandler [WEAK]
EXPORT OTG_HS_EP1_OUT_IRQHandler [WEAK]
EXPORT OTG_HS_EP1_IN_IRQHandler [WEAK]
EXPORT OTG_HS_WKUP_IRQHandler [WEAK]
EXPORT OTG_HS_IRQHandler [WEAK]
EXPORT DCMI_IRQHandler [WEAK]
EXPORT CRYP_IRQHandler [WEAK]
EXPORT HASH_RNG_IRQHandler [WEAK]
EXPORT FPU_IRQHandler [WEAK]

WWDG_IRQHandler
PVD_IRQHandler
TAMP_STAMP_IRQHandler
RTC_WKUP_IRQHandler
FLASH_IRQHandler
RCC_IRQHandler
EXTI0_IRQHandler
EXTI1_IRQHandler
EXTI2_IRQHandler
EXTI3_IRQHandler
EXTI4_IRQHandler
DMA1_Stream0_IRQHandler
DMA1_Stream1_IRQHandler
DMA1_Stream2_IRQHandler
DMA1_Stream3_IRQHandler
DMA1_Stream4_IRQHandler
DMA1_Stream5_IRQHandler
DMA1_Stream6_IRQHandler
ADC_IRQHandler
CAN1_TX_IRQHandler
CAN1_RX0_IRQHandler
CAN1_RX1_IRQHandler
CAN1_SCE_IRQHandler
EXTI9_5_IRQHandler
TIM1_BRK_TIM9_IRQHandler
TIM1_UP_TIM10_IRQHandler
TIM1_TRG_COM_TIM11_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
RTC_Alarm_IRQHandler
OTG_FS_WKUP_IRQHandler
TIM8_BRK_TIM12_IRQHandler
TIM8_UP_TIM13_IRQHandler
TIM8_TRG_COM_TIM14_IRQHandler
TIM8_CC_IRQHandler
DMA1_Stream7_IRQHandler
FSMC_IRQHandler
SDIO_IRQHandler
TIM5_IRQHandler
SPI3_IRQHandler
UART4_IRQHandler
UART5_IRQHandler
TIM6_DAC_IRQHandler
TIM7_IRQHandler
DMA2_Stream0_IRQHandler
DMA2_Stream1_IRQHandler
DMA2_Stream2_IRQHandler
DMA2_Stream3_IRQHandler
DMA2_Stream4_IRQHandler
ETH_IRQHandler
ETH_WKUP_IRQHandler
CAN2_TX_IRQHandler
CAN2_RX0_IRQHandler
CAN2_RX1_IRQHandler
CAN2_SCE_IRQHandler
OTG_FS_IRQHandler
DMA2_Stream5_IRQHandler
DMA2_Stream6_IRQHandler
DMA2_Stream7_IRQHandler
USART6_IRQHandler
I2C3_EV_IRQHandler
I2C3_ER_IRQHandler
OTG_HS_EP1_OUT_IRQHandler
OTG_HS_EP1_IN_IRQHandler
OTG_HS_WKUP_IRQHandler
OTG_HS_IRQHandler
DCMI_IRQHandler
CRYP_IRQHandler
HASH_RNG_IRQHandler
FPU_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

[1] [2]

关键字：STM32 启动文件引用地址：STM32启动文件

上一篇：手把手之STM32内核定时器
下一篇：STM32 LwIP测试过程简介

推荐阅读最新更新时间：2026-03-19 16:05

STM32启动文件：startup_stm32f10x_hd.s等启动文件的简单描述

在官方的库文件中，分别有如下文件： startup │ │ │ ├─arm │ │ │ │ startup_stm32f10x_cl.s │ │ │ │ startup_stm32f10x_hd.s │ │ │ │ startup_stm32f10x_hd_vl.s │ │ │ │ startup_stm32f10x_ld.s │ │ │ │ startup_stm32f10x_ld_vl.s │ │ │ │ startup_stm32f10x_md.s │ │ │ │ s

[单片机]

stm32启动文件和汇编指令简析

以stm32fxxxx为例一、启动文件，startup_stm32f40_41xxx.S 1.定义：启动文件由汇编填写，是系统上电复位后第一个执行的程序。 2.特征（1）初始化堆栈指针SP=_initial_sp （2）初始化PC指针=Reset_Handler （3）初始化中断向量表。（4）配置系统时钟。（5）调用c库函数_main初始化用户堆栈，从而最终调用main函数去到c的内容。二、汇编指令启动文件使用ARM汇编指令汇总 EQU 给数字常量取一个符号名，相当于c语言define。 AREA 汇编一个新的代码段或数据段。 SPACE 分配内存空间。 PRESERVE8 当前文件堆栈需按照8字节对齐。 EXP

[单片机]

STM32启动文件startup_stm32f10x_hd.s的代码讲解

本文对STM32启动文件startup_stm32f10x_hd.s的代码进行讲解，此文件的代码在任何一个STM32F10x工程中都可以找到。启动文件使用的ARM汇编指令汇总 Stack——栈 Stack_Size EQU 0x00000400 AREA STACK, NOINIT, READWRITE, ALIGN= Stack_Mem SPACE Stack_Size __initial_sp 开辟栈的大小为 0X00000400（1KB），名字为 STACK， NOINIT 即不初始化，可读可写， 8（2^3）字节对齐。栈的作用是用于局部变量，函数调用，函数形参等的开销，栈的大小不能超过内部SRA

[单片机]

<font color='red'>STM32</font><font color='red'>启动文件</font>startup_stm32f10x_hd.s的代码讲解

解析STM32的启动过程及STM32 启动文件选择

STM32 启动文件选择小容量产品是指闪存存储器容量在16K至32K字节之间的STM32F101xx、STM32F102xx和STM32F103xx微控制器。中容量产品是指闪存存储器容量在64K至128K字节之间的STM32F101xx、STM32F102xx和STM32F103xx微控制器。大容量产品是指闪存存储器容量在256K至512K字节之间的STM32F101xx和STM32F103xx微控制器。互联型产品是指STM32F105xx和STM32F107xx微控制器。 - startup_stm32f10x_ld_vl.s: for STM32 Low density Value line devices - st

[单片机]

详解STM32启动文件

本文对STM32启动文件startup_stm32f10x_hd.s的代码进行讲解，此文件的代码在任何一个STM32F10x工程中都可以找到。可以点击文末阅读原文直接下载此文件，提取码stm3。启动文件使用的ARM汇编指令汇总 Stack——栈 Stack_Size EQU 0x00000400 AREA STACK, NOINIT, READWRITE, ALIGN= Stack_Mem SPACE Stack_Size __initial_sp 开辟栈的大小为 0X00000400（1KB），名字为 STACK， NOINIT 即不初始化，可读可写， 8（2^3）字节对齐。栈的作用是用于局部变量，函数调用，函数形

[单片机]

stm32的启动文件--startup_stm32f10x_hd.s

在学习stm32 定时器中断时，发现我写的程序进入不了中断服务程序，而且我也没找到定时器服务程序的注册入口，上网查了一下，大家都使用的都是下面这个函数：void TIM3_IRQHandler(void)，那为什么其他人的中断程序可以执行，而我的却执行不了呢。经过请教得知，我的工程中没有包含该一个叫做startup_stm32f10x_hd.s的文件，而我所谓的中断服务程序的注册入口就是包含在这里。startup_stm32f10x_hd.s是用汇编语言编写的STM32处理器的初始化程序，它规定了系统的堆栈大小等系统信息，也包含了一个向量表，这个向量表中对所有的中断入口函数都进行了分配，如TIM3的中断入口是： ……

[单片机]

玩转STM32(5)找到启动文件

前学习了目录分类的重要性，可以看到分为三个目录，那么你选择哪一个目录点击进入去呢？因为我们要打开项目工程，那么就需要找到开发工具的工程文件，因此就需要打开工程的目录Project，就是这个目录命名的原因。在这个目录下面放置所有与目录相关的文件，当你打开这个目录时，就可以看到目录大体如下：在这里一眼看到最醒目的图标那个就是启动工程文件，只要双击这个文件就可以打开工程了。你也许想问其它文件是做什么作用呢，为什么需要这么多文件呢？现在我们就来详细地看一下工程目录每个文件和目录的大体作用。到这里已经把Project下的文件和目录搞清楚，因此当你打开工程时，记得找到像project.uvprojx文件结尾的文件，就是工程文件，才

[单片机]

玩转<font color='red'>STM32</font>(5)找到<font color='red'>启动文件</font>

STM32启动文件和链接脚本

铺垫 SP 栈指针，栈由程序分配，函数的参数传递，存储局部变量，在中断等异常产生时保存处理器状态和寄存器数值。都需要 SP 指引，才能从正确的地址空间取出正确的数据来确保程序执行。在 cortex-M 中R13 为栈指针。物理上存在两个栈指针，分别是主栈指针 MSP，进程栈指针 PSP。在复位后或处理器处于处理模式时，其 MSP 会被处理器选择使用。大多数情况下，若应用程序不需要嵌入式 OS, 那么 PSP 没必要使用。PSP 的初始值未定义，而 MSP 的初始值则需要在复位流程中从存储器第一个字中取出。 cortex-M 处理器使用的栈模型被称作 “满递减”。处理器启动后，SP 被设置为栈存储空间的最后位置。对于每

[单片机]

热门资源推荐
热门放大器推荐

小广播

热门活动

换一批

■你晒单我买单2026第1期报名中，DigiKey得捷带您畅享好物！

■有奖直播：AI基础设施技术测试周

■免费申请《一本书讲透汽车功能安全：标准详解与应用实践》，挑战《ISO26262标准》共读，赢好礼

■装备焕新月：e络盟Multicomp Pro系列产品，小投入，大升级 —— 装备焕新惊喜体验