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本帖最后由 TLLED 于 2018-12-4 21:37 编辑 2 ]" t. o* W4 r8 @; S, J8 H( F6 b& } 《STM32库开发实战指南-基于STM32F103霸道》第15章--节启动文件详解的学习的理解# {) O# V0 B i7 J* ]5 N0 l4 H ) j' M& r, Q9 ]* c- j2 | S5 i- g 一、书中错误地方+ `9 s1 }; g6 ~ 9 N$ T- \# f8 |: `% b" B4 Q; ] 启动文件讲解---本是第15章节5 W3 h. \) {8 n 
后面几页，页眉变成第16章节。书中有一个错别字。 X/ e. V( u2 H H: x* B& q3 V 
1 e+ w0 A$ a/ {2 F% k e 二、启动文件的理解! ~6 U$ \/ L& Y. i' W( ~0 _: ? + k: q6 y% J$ ^( k+ \) V 启动文件是上电后，系统执行的第一个程序，由汇编程序编写，它主要做了以下工作。6 z$ ~ p# _( U" j6 L2 } 1> 初始化堆栈指针 SP=_initial_sp 2> 初始化PC指针 PC=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初始化堆栈，最终调用main函数到C程序。 z+ Y0 ^1 `; z 2 ~4 ]0 ?, U! O' C- x% ? 三、对程序的理解 程序代码： ;******************** (C) COPYRIGHT 2011 STMicroelectronics ********************/ Q j. ?5 ^) i( U6 S* o% f: V ;* File Name : startup_stm32f10x_hd.s6 w5 J5 Q6 ~% `6 h ;* Author : MCD Application Team2 q( d B3 t8 h% c6 r0 h ;* Version : V3.5.0& N# Q2 o& J# M! ^! J1 v ;* Date : 11-March-20115 m" h1 N% W2 ], w: b ;* Description : STM32F10x High Density Devices vector table for MDK-ARM & @" i& L; N( {, e* u; [3 { ;* toolchain. ;* This module performs: ;* - Set the initial SP ;* - Set the initial PC == Reset_Handler ;* - Set the vector table entries with the exceptions ISR address! J* t8 I0 {4 t1 \6 p5 P2 @2 y ;* - 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)% Y& y; K$ H8 {3 A ;* - Branches to __main in the C library (which eventually0 H; j, K1 S9 w; z4 e0 D* g ;* calls main()). ;* After Reset the CortexM3 processor is in Thread mode,3 o0 P7 C* O9 X; p& r ;* priority is Privileged, and the Stack is set to Main. ;* <<< Use Configuration Wizard in Context Menu >>> 0 g# v! [# s5 S s* H( D# e ;*******************************************************************************( \# D9 I2 w6 z& B4 [2 r ; 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.: r+ x% `: ?$ F, v. q! G+ q8 a7 h ; AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,# i% T: y: b) \3 e ; 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. z' W0 U1 u6 X- S ; INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.+ Z* c1 L {" v* Z( t0 e& R; @ ;*******************************************************************************0 f$ l' ] r0 \2 t ; Amount of memory (in bytes) allocated for Stack8 C7 c; _; G$ l6 D$ X6 s ; Tailor this value to your application needs% b+ i1 @9 q. @ ; <h> Stack Configuration ; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h> + O5 C9 D: z# Q* e Stack_Size EQU 0x00000400 * U5 ^9 w7 h; c, e: `* A 1 w3 [2 B$ i1 P" y' @ AREA STACK, NOINIT, READWRITE, ALIGN=3 Stack_Mem SPACE Stack_Size ;栈大小1KB，名称STACK，NOINT-不初始化 2^3=8字节对齐$ Y" y7 `2 k- b1 V __initial_sp : W9 o; V$ `$ Y8 G9 H" J ; <h> Heap Configuration1 p. H2 g0 V' C; C/ _6 J6 c ; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h>3 D; x6 `7 ^" t" E$ N ) V( O; B" _! g/ B, J% B9 Z Heap_Size EQU 0x00000200 7 `7 n% b8 K9 ^5 F4 T AREA HEAP, NOINIT, READWRITE, ALIGN=3 __heap_base ;堆起始地址 Heap_Mem SPACE Heap_Size ;堆大小512B __heap_limit ;堆结束地址1 b$ W0 ]2 Q( u* z, ~6 ~7 H$ H5 n PRESERVE8 ;指定当前文件的堆栈按照8字节对齐 THUMB ;表示后面兼容THUNB指令集 7 G( I! Q- W) _, [ ! r. D5 O0 I; f ; Vector Table Mapped to Address 0 at Reset AREA RESET, DATA, READONLY ;定义一个数据段名称为RESET，只读 EXPORT __Vectors ;声明全局变量__Vectors# H0 k, U) X9 H* ^# Y EXPORT __Vectors_End ;声明全局变量__Vectors_End: o7 Z: o j; o EXPORT __Vectors_Size ;声明全局变量__Vectors_Size# S+ F2 ^9 `7 t* D* R+ r! r ' a. g! C$ V X; Z# [) j __Vectors DCD __initial_sp ; 栈顶地址 DCD Reset_Handler ; 复位处理程序/ W- ^* p+ y% Q$ k' S DCD NMI_Handler ; 不可屏蔽中断处理 DCD HardFault_Handler ; Hard Fault 处理 DCD MemManage_Handler ; MPU Fault 处理5 b3 d. F1 T1 O4 s3 z* [7 N DCD BusFault_Handler ; Bus Fault 处理 DCD UsageFault_Handler ; Usage Fault 处理2 a" l8 C5 E9 {# ] DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved$ V* `1 z8 }& t+ D. P DCD 0 ; Reserved DCD SVC_Handler ; SVCall Handler DCD DebugMon_Handler ; Debug Monitor Handler DCD 0 ; Reserved, Z5 q$ C8 h+ B! s8 ]( K DCD PendSV_Handler ; PendSV Handler DCD SysTick_Handler ; SysTick 处理 ; 外部中断开始1 v2 m9 c5 ?9 e" r& S& _ DCD WWDG_IRQHandler ; Window Watchdog9 n" ?" J$ }/ N- S- K8 w: k DCD PVD_IRQHandler ; PVD through EXTI Line detect DCD TAMPER_IRQHandler ; Tamper; M2 W5 h+ O8 z# T2 m" } DCD RTC_IRQHandler ; RTC DCD FLASH_IRQHandler ; Flash9 b8 S- q% v4 i- m; X- [) p DCD RCC_IRQHandler ; RCC DCD EXTI0_IRQHandler ; EXTI Line 0. J) U w8 H( h N- C# q7 R2 j/ } 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. P- L$ z) D' W7 a DCD DMA1_Channel2_IRQHandler ; DMA1 Channel 2 DCD DMA1_Channel3_IRQHandler ; DMA1 Channel 3) ]# b" P& f; ~8 ^ DCD DMA1_Channel4_IRQHandler ; DMA1 Channel 4 DCD DMA1_Channel5_IRQHandler ; DMA1 Channel 51 X3 R: E/ y! a: B0 F4 l8 q9 O DCD DMA1_Channel6_IRQHandler ; DMA1 Channel 65 R) C7 u" o" |1 E5 I: l+ g DCD DMA1_Channel7_IRQHandler ; DMA1 Channel 75 S. m, q: T2 Y9 Y8 ? DCD ADC1_2_IRQHandler ; ADC1 & ADC2) b m: E% B- m5 P6 ~1 Q( ]6 V5 d DCD USB_HP_CAN1_TX_IRQHandler ; USB High Priority or CAN1 TX+ @! @% z, }: U8 |+ M8 F9 y6 _ DCD USB_LP_CAN1_RX0_IRQHandler ; USB Low Priority or CAN1 RX0# k4 i- y y# v1 u DCD CAN1_RX1_IRQHandler ; CAN1 RX16 G3 U/ @1 v7 o; j1 A. d 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$ L' N& ~$ A/ K' o: ~! \ DCD TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare DCD TIM2_IRQHandler ; TIM2! E( [7 x j+ v$ u) L DCD TIM3_IRQHandler ; TIM3 DCD TIM4_IRQHandler ; TIM4& s4 U- I8 |' H/ E; S DCD I2C1_EV_IRQHandler ; I2C1 Event. P t! f- @) f DCD I2C1_ER_IRQHandler ; I2C1 Error3 w6 Q' R8 V8 G DCD I2C2_EV_IRQHandler ; I2C2 Event s* m2 x# w- a8 T8 M: B. e. q) t# a DCD I2C2_ER_IRQHandler ; I2C2 Error DCD SPI1_IRQHandler ; SPI1, Q3 d: B! g( v. o3 |! r DCD SPI2_IRQHandler ; SPI2 DCD USART1_IRQHandler ; USART1 DCD USART2_IRQHandler ; USART2/ X; u$ @# H- C0 H; N DCD USART3_IRQHandler ; USART3 DCD EXTI15_10_IRQHandler ; EXTI Line 15..10 DCD RTCAlarm_IRQHandler ; RTC Alarm through EXTI Line/ b7 t F8 A; i, S5 p i7 y0 v DCD USBWakeUp_IRQHandler ; USB Wakeup from suspend" X$ I$ {1 t9 q1 b4 l( q* f3 F$ p DCD TIM8_BRK_IRQHandler ; TIM8 Break DCD TIM8_UP_IRQHandler ; TIM8 Update9 c, l1 b: a! \5 s DCD TIM8_TRG_COM_IRQHandler ; TIM8 Trigger and Commutation w3 ~ h( L: O DCD TIM8_CC_IRQHandler ; TIM8 Capture Compare DCD ADC3_IRQHandler ; ADC35 n( F r2 E s/ z6 D( g6 p3 y DCD FSMC_IRQHandler ; FSMC DCD SDIO_IRQHandler ; SDIO DCD TIM5_IRQHandler ; TIM5# X1 Q& Z+ m, B8 |! L5 c2 ]3 L- | DCD SPI3_IRQHandler ; SPI3 DCD UART4_IRQHandler ; UART4$ _) v8 \9 f2 B& \3 y8 f F8 p8 ^ DCD UART5_IRQHandler ; UART5% C& }) g) u# q 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存放的是复位程序地址，以此类推。9 P* P2 v: D! {: X0 M( A. T. `. ` ;DCD - 分配一个或多个以字为单位的内存，以4字节对齐，并要求初始化这些内存。' E( ~. U g6 _1 |, V' e __Vectors_Size EQU __Vectors_End - __Vectors //向量表大小 " k0 k- g: G8 @/ ?; q AREA |.text|, CODE, READONLY ;定义一个.text名称的代码段，只读 + |1 ^5 {! j! Y% \0 {% [6 G ; 复位处理 Reset_Handler PROC ; PROC-定义子程序与ENDP成对使用5 N7 C: g$ \' y" d! p6 m EXPORT Reset_Handler [WEAK] ;声明Reset_Handler，可被外部使用的全局属性 IMPORT __main ;声明外部文件4 E; g% D# s% {8 k6 D IMPORT SystemInit ;声明外部文件，类似于C语言的extern外部声明! K; ?2 Y" Z8 W. O LDR R0, =SystemInit6 \4 _) `; K* Z" a$ L0 M BLX R0 ;跳转到SystemInit地址执行 LDR R0, =__main BX R0 ;跳转到__main地址执行& i' t) ` T. G1 |, _ ENDP ;子程序结束 " J8 Y" E5 G6 ^$ V ; Dummy Exception Handlers (infinite loops which can be modified)/ {5 A- P1 N) e+ I5 g9 V4 ? ; w" l( I: s% x7 m NMI_Handler PROC ;异常处理 EXPORT NMI_Handler [WEAK]6 R. `) c C/ c8 @ B . ;无限循环3 w8 n$ l/ e3 t3 K/ Q; R+ S ENDP HardFault_Handler\ PROC EXPORT HardFault_Handler [WEAK]$ x5 n) ^7 Q, } B . ENDP- K& E0 K9 k2 @ MemManage_Handler\2 v1 M1 {: \% Q# A* I# A' e PROC EXPORT MemManage_Handler [WEAK]3 j# @8 g: J7 ~. r l$ S B .3 O7 g X5 K$ S ENDP BusFault_Handler\! u2 K! ]# k7 n5 b& {; A. U7 R PROC EXPORT BusFault_Handler [WEAK] B .* }9 f$ P# l% o a! T ENDP UsageFault_Handler\7 y2 J! V+ N2 e PROC- ~8 R4 f% S, d7 F1 Q EXPORT UsageFault_Handler [WEAK]; q8 P0 @% Q7 A B .+ w. j( c" @% t$ @0 m# L3 k ENDP SVC_Handler PROC$ Z5 r- u/ q4 p& t EXPORT SVC_Handler [WEAK] B .4 n, u) a6 O4 h l. g8 F/ J ENDP: I' j ] ]; s* |7 B1 ?$ B$ A DebugMon_Handler\ PROC EXPORT DebugMon_Handler [WEAK] B . ENDP2 }8 Q+ j4 n+ ~; \0 j3 O PendSV_Handler PROC EXPORT PendSV_Handler [WEAK] B . ENDP4 ?0 q) ~ S. Z8 P. ]% c SysTick_Handler PROC EXPORT SysTick_Handler [WEAK] B . ENDP Default_Handler PROC. H6 ~; x& m {5 u1 y/ P EXPORT WWDG_IRQHandler [WEAK] o4 ]' ?9 D5 [: W$ h8 c I EXPORT PVD_IRQHandler [WEAK] EXPORT TAMPER_IRQHandler [WEAK] EXPORT RTC_IRQHandler [WEAK] EXPORT FLASH_IRQHandler [WEAK] EXPORT RCC_IRQHandler [WEAK] EXPORT EXTI0_IRQHandler [WEAK], U8 u4 z1 z8 h7 ?5 k& ^" Z EXPORT EXTI1_IRQHandler [WEAK]: R0 D# ?+ Z- u- z J# |9 q6 T EXPORT EXTI2_IRQHandler [WEAK] EXPORT EXTI3_IRQHandler [WEAK] EXPORT EXTI4_IRQHandler [WEAK]# N+ o) C& p6 j" { EXPORT DMA1_Channel1_IRQHandler [WEAK] EXPORT DMA1_Channel2_IRQHandler [WEAK]# C6 p+ d. E; R$ M, n4 z EXPORT DMA1_Channel3_IRQHandler [WEAK] EXPORT DMA1_Channel4_IRQHandler [WEAK]6 @, B% f/ y" Z4 S( a& a1 O2 v EXPORT DMA1_Channel5_IRQHandler [WEAK] EXPORT DMA1_Channel6_IRQHandler [WEAK]" c6 A% p7 A, D8 D EXPORT DMA1_Channel7_IRQHandler [WEAK]. |% I5 ~6 \1 Y" x% W EXPORT ADC1_2_IRQHandler [WEAK]! n$ x1 Z! S+ H6 F$ H/ Z# K EXPORT USB_HP_CAN1_TX_IRQHandler [WEAK]) b+ K: ]/ L# d, f 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]- T: R# h6 P1 p' i* F; }( T# V# U% f EXPORT TIM1_CC_IRQHandler [WEAK] EXPORT TIM2_IRQHandler [WEAK]- M, s* _: T& Z4 D: p8 c EXPORT TIM3_IRQHandler [WEAK] EXPORT TIM4_IRQHandler [WEAK]& z/ `' ]7 s- K. \ EXPORT I2C1_EV_IRQHandler [WEAK] EXPORT I2C1_ER_IRQHandler [WEAK]4 p1 L( K y' Q' B1 P9 D2 `6 }4 D 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]+ ]- X0 q1 f3 b EXPORT USART3_IRQHandler [WEAK] J: Y G; w: Q) `7 `. {0 X6 h EXPORT EXTI15_10_IRQHandler [WEAK]! o7 d$ l3 ~: i5 P- e9 {4 y EXPORT RTCAlarm_IRQHandler [WEAK]! ~; v. ~9 s, T) g EXPORT USBWakeUp_IRQHandler [WEAK]1 O& u6 w( s- H0 {: f8 i. | EXPORT TIM8_BRK_IRQHandler [WEAK] EXPORT TIM8_UP_IRQHandler [WEAK]- V. p8 ?9 K2 |$ _, y+ H4 j EXPORT TIM8_TRG_COM_IRQHandler [WEAK] EXPORT TIM8_CC_IRQHandler [WEAK]: Y( }$ {+ o/ B k4 m0 K EXPORT ADC3_IRQHandler [WEAK] EXPORT FSMC_IRQHandler [WEAK] EXPORT SDIO_IRQHandler [WEAK]2 V- S" `. j! Q$ {5 t# T& j$ J EXPORT TIM5_IRQHandler [WEAK]1 q7 b6 }3 L8 w& j# i, b5 I EXPORT SPI3_IRQHandler [WEAK]0 r1 k5 A5 M( f [8 I EXPORT UART4_IRQHandler [WEAK]( |/ ~# h% j- l1 r& I! N: x7 R- D EXPORT UART5_IRQHandler [WEAK] EXPORT TIM6_IRQHandler [WEAK] EXPORT TIM7_IRQHandler [WEAK], [: j9 K7 w) c4 R EXPORT DMA2_Channel1_IRQHandler [WEAK] @4 F/ y8 `% G EXPORT DMA2_Channel2_IRQHandler [WEAK] EXPORT DMA2_Channel3_IRQHandler [WEAK] EXPORT DMA2_Channel4_5_IRQHandler [WEAK] # W$ {3 o; s2 y2 j2 c ` WWDG_IRQHandler. }# c' f' I. g PVD_IRQHandler8 V) ^3 ^5 H4 X) y+ C0 A TAMPER_IRQHandler- R5 u/ d& L" i% D RTC_IRQHandler FLASH_IRQHandler RCC_IRQHandler: U, k9 \% ~: L8 h( K EXTI0_IRQHandler0 m/ F5 j& h' Y# I7 D$ U) B EXTI1_IRQHandler EXTI2_IRQHandler% \. ~; ]& B- e2 G* Z$ b EXTI3_IRQHandler* ?$ Q7 ~1 a* L1 w+ r9 p7 _ EXTI4_IRQHandler DMA1_Channel1_IRQHandler5 z E" [3 W E DMA1_Channel2_IRQHandler# \5 d; u/ K4 C6 H; p% n& M; v( D' |. U DMA1_Channel3_IRQHandler DMA1_Channel4_IRQHandler2 t! q) U1 S6 Y9 W+ } DMA1_Channel5_IRQHandler/ U |- u! n, P8 F2 b9 J: h: B DMA1_Channel6_IRQHandler DMA1_Channel7_IRQHandler' f( M5 v: W; d1 q1 }5 c ADC1_2_IRQHandler USB_HP_CAN1_TX_IRQHandler USB_LP_CAN1_RX0_IRQHandler CAN1_RX1_IRQHandler CAN1_SCE_IRQHandler EXTI9_5_IRQHandler3 H5 q' h2 G- v7 b4 d8 R TIM1_BRK_IRQHandler, f( s b' j! y, |; R TIM1_UP_IRQHandler TIM1_TRG_COM_IRQHandler TIM1_CC_IRQHandler4 O. m* g5 m. v* _ K3 _' n+ q TIM2_IRQHandler TIM3_IRQHandler TIM4_IRQHandler6 ?$ @9 x; `5 e _) V I2C1_EV_IRQHandler( L) h8 G7 k) S0 U' E I2C1_ER_IRQHandler6 q* W1 S. t" J0 B5 _ I2C2_EV_IRQHandler I2C2_ER_IRQHandler SPI1_IRQHandler) n) r& o& a' O/ B6 C' J- i SPI2_IRQHandler- `+ O. S5 c0 Y" } f" s- f USART1_IRQHandler USART2_IRQHandler USART3_IRQHandler EXTI15_10_IRQHandler& _: [1 |' w3 v RTCAlarm_IRQHandler6 J) \$ c9 W. \- M; W6 m$ L$ v USBWakeUp_IRQHandler4 h' L8 ], V9 x4 ]8 f5 z: P/ G TIM8_BRK_IRQHandler TIM8_UP_IRQHandler/ y4 j; u+ |* m( u" l TIM8_TRG_COM_IRQHandler9 {/ g* h) P+ H/ O" z* f7 H TIM8_CC_IRQHandler ADC3_IRQHandler; X/ Z$ A' F! y' T1 X2 T7 } FSMC_IRQHandler. w) y5 {7 N( U, ~$ R; k9 J3 Q SDIO_IRQHandler {5 Z0 D& c) Z3 X' Z TIM5_IRQHandler7 U- n |5 R3 e! \& X) M1 e SPI3_IRQHandler% i0 D) A+ p8 { UART4_IRQHandler/ f8 P5 N/ S/ ?1 M1 T( P3 |- |" M UART5_IRQHandler, g+ i' c5 F/ t TIM6_IRQHandler TIM7_IRQHandler DMA2_Channel1_IRQHandler. |4 H) d3 r6 u2 Z% N7 g/ e" i DMA2_Channel2_IRQHandler& s$ o+ x$ C+ R% x3 C& y DMA2_Channel3_IRQHandler* D( ~& n3 P2 F. y7 S DMA2_Channel4_5_IRQHandler6 Q' {) [+ w- S; `2 k* B B . ENDP. \4 K' O/ i" @, } 5 w, q4 l, d; v: d* B6 T ALIGN ;对指令或者数据存放的地址进行对齐，后面会跟一个立即书，缺省表示4个字节( X0 H ?# w' Q* z& k! D3 C 9 y" n/ u/ D& ~ ;*******************************************************************************% ?# e, v C8 z+ G/ _ p# J ; User Stack and Heap initialization ;******************************************************************************* IF : DEF:__MICROLIB ;这个宏在Keil里面开启 + [* [$ K, r- s8 g! { EXPORT __initial_sp ;声明标号 EXPORT __heap_base ;声明标号，栈起始地址 EXPORT __heap_limit ;声明标号，栈结束地址5 g9 s- G& r B8 ^; b. I, D % P* {; G- ^ ?" S6 I$ D ELSE _' L& M4 f/ V1 e7 a+ p IMPORT __use_two_region_memory ;这个函数由用户自己实现' [% _8 D0 B: [# _1 q EXPORT __user_initial_stackheap __user_initial_stackheap3 V! }4 ^7 I/ I0 ] : J& m6 ~! j9 U1 @0 r: ^. y! t! r LDR R0, = Heap_Mem! |: @0 @2 l& X0 r2 V5 M/ f LDR R1, =(Stack_Mem + Stack_Size) LDR R2, = (Heap_Mem + Heap_Size)/ Q! P3 ?0 P1 z LDR R3, = Stack_Mem# b1 J$ L# M; F+ Z7 x BX LR! }& U C; O2 |, U) Q ( @9 g1 \9 {) B, ^8 ^ ALIGN ENDIF . W# P4 S- j! ~4 x& F END ;******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE***** 以上是通过本章节学习的一点理解，还有不足之处，后续再深入学习。 $ b- T/ T$ M+ W# V0 n" W 7 c* V( _& h% t8 x8 P ' r1 A/ i) m) L& {, P+ L |
STMCU-管管
回答时间：2018-12-6 14:33:31
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