技术咨询
代买器件
商务客服
研发客服STM32的启动文件
STM32作为一款单片机，它的启动方式很简单，即当Boot配置了从内部Flash启动模式之后，一上电程序就会从0x8000000地址处开始执行文件，因此我们在使用Keil设置程序起始地址的时候，需要将这个Flash地址设置成0x8000000，只有将这个地址设置成0x8000000，生成的hex文件才可以被正常烧录到此地址，单片机上电之后才可以正常启动。而如果使用J-Flash工具烧写Hex文件时，这个地址会自动根据Hex文件解析出来。然而如果当你烧写二进制Bin文件时，还需要手动将单片机的起始地址制定出来，关于Hex文件和Bin文件的异同点，这个又是可以长篇大论一番了，我们下次特别写文章来讲。
图1 Keil设置起始地址和空间
STM32启动文件
;********************* (C) COPYRIGHT 2017 STMicroelectronics ********************;* File Name : startup_stm32l151xb.s
;* Author : MCD Application Team
;* Description : STM32L151XB Devices vector 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
;* - Branches to __main in the C library (which eventually
;* calls main()).
;* After Reset the Cortex-M3 processor is in Thread mode,
;* priority is Privileged, and the Stack is set to Main.
;********************************************************************************;*;* Copyright (c) 2017 STMicroelectronics. All rights reserved.
;*;* This software component is licensed by ST under BSD 3-Clause license,
;* the "License"; You may not use this file except in compliance with the
;* License. You may obtain a copy of the License at:
;* opensource.org/licenses/BSD-3-Clause
;*
;*******************************************************************************
;* <<< Use Configuration Wizard in Context Menu >>>
;
; Amount of memory (in bytes) allocated for Stack
; Tailor this value to your application needs
;
;
; h>Stack_Size EQU 0x00000400
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size__initial_sp
;
;
; 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_STAMP_IRQHandler ; Tamper and Time Stamp
DCD RTC_WKUP_IRQHandler ; RTC Wakeup
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_IRQHandler ; ADC1
DCD USB_HP_IRQHandler ; USB High Priority
DCD USB_LP_IRQHandler ; USB Low Priority
DCD DAC_IRQHandler ; DAC
DCD COMP_IRQHandler ; COMP through EXTI Line
DCD EXTI9_5_IRQHandler ; EXTI Line 9..5
DCD 0 ; Reserved
DCD TIM9_IRQHandler ; TIM9