|
本帖最后由 TLLED 于 2018-12-4 21:37 编辑 9 W% N& k1 E8 l) q& ^ 《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 一、书中错误地方$ G6 I/ t3 t% l+ j ( Y) G1 Z8 I3 d" d5 U 启动文件讲解---本是第15章节 
后面几页，页眉变成第16章节。书中有一个错别字。 
二、启动文件的理解+ L" r6 Q8 [3 F! m x5 k 7 R: j' k: z( E# u! O 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。! O6 L2 V+ H9 o5 u+ [$ v, G 1> 初始化堆栈指针 SP=_initial_sp& M" {% c9 y4 o, n 2> 初始化PC指针 PC=Reset_Handler 3> 初始化中断向量表. b/ T' U, h8 J9 f 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。0 w) T7 p/ ?0 G3 ?: W, l $ y' c2 j, w X' \' B! L6 I 三、对程序的理解 1 ?3 O+ O7 V' @& U 3 F& ^! f- q" M* v 程序代码：( B( d ^! ]2 b9 O h7 _' `2 q ;******************** (C) COPYRIGHT 2011 STMicroelectronics ********************1 `5 E5 k0 U) l ;* File Name : startup_stm32f10x_hd.s ;* Author : MCD Application Team' D* S* G" N* F: y ;* Version : V3.5.06 Q9 e, N* G, |+ }# y ;* Date : 11-March-2011 ;* Description : STM32F10x High Density Devices vector table for MDK-ARM ! q1 E* Q. l8 V7 L& h3 v6 k, i ;* toolchain. 7 e6 C) N9 E0 Y7 o' E ;* This module performs:: o' b' ]) t" ~( I$ A- J ;* - Set the initial SP1 Y6 y4 V* V+ }* t ;* - Set the initial PC == Reset_Handler2 i: k, z# ]# w8 z ;* - Set the vector table entries with the exceptions ISR address ;* - Configure the clock system and also configure the external # @$ S; O7 i; K ;* SRAM mounted on STM3210E-EVAL board to be used as data , b7 P8 L! D$ T' ~( O% [1 t ;* memory (optional, to be enabled by user)( [2 K* B' K2 F3 } ;* - Branches to __main in the C library (which eventually) H1 A+ u2 Y% T q, v9 B ;* calls main()). ;* After Reset the CortexM3 processor is in Thread mode,/ W" u5 K5 l% ?% R/ Z. \+ L- D6 S( T ;* priority is Privileged, and the Stack is set to Main. ;* <<< Use Configuration Wizard in Context Menu >>> / k% p& e& X o ;*******************************************************************************1 M2 f, F; D/ }1 y: Q ; 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.' _7 d0 A, E' E0 H& K' J9 y ; AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, ; INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE9 |) l) j: e! H6 I7 J- m. E% l ; CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING0 t% u2 v7 n8 C) t ; INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. ;*******************************************************************************: L3 t' Q( l. t; _' U3 R 6 Z% ?1 L4 t% k3 P& X4 j2 H; \ ; Amount of memory (in bytes) allocated for Stack1 n' R' t; Y/ y" O* l ; Tailor this value to your application needs* s8 f6 B5 b6 Z) s2 U ; <h> Stack Configuration1 W- K1 r5 T$ ~8 @3 P ; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>: J3 E" O- m7 k3 U: L! S! n4 Q0 _! h( X ; </h> 0 b+ ?: l/ b/ z7 ^2 u Stack_Size EQU 0x00000400 - b9 ~' \$ y" ]3 x7 i) ~, T& V 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4 Q) X4 C% K# i# J __initial_sp$ B; P4 E, T$ F4 U F: ?0 O * @ v8 D* r4 }( J: I4 L& k ; <h> Heap Configuration/ o! O" s! g9 e, ?% X0 ?- D ; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>. G# J' W8 R8 _3 t0 \ ; </h> Heap_Size EQU 0x00000200 AREA HEAP, NOINIT, READWRITE, ALIGN=3* ^# _/ b- _/ e1 n1 u5 z4 M __heap_base ;堆起始地址4 E. C( R& ]: {( e Heap_Mem SPACE Heap_Size ;堆大小512B! r: |& t- G: W1 B2 b6 f __heap_limit ;堆结束地址. Q! t( {0 s9 C N& P# o* k, V 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 ; 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! e- E# a; r) Z7 l( F/ {2 V/ B EXPORT __Vectors_End ;声明全局变量__Vectors_End EXPORT __Vectors_Size ;声明全局变量__Vectors_Size __Vectors DCD __initial_sp ; 栈顶地址 DCD Reset_Handler ; 复位处理程序! P2 Q$ W: @1 @' e- {! ^ p 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 DCD BusFault_Handler ; Bus Fault 处理6 `5 M& G3 C6 r9 _ R DCD UsageFault_Handler ; Usage Fault 处理 DCD 0 ; Reserved DCD 0 ; Reserved1 m& n% {0 n0 r. ]4 u) G DCD 0 ; Reserved DCD 0 ; Reserved DCD SVC_Handler ; SVCall Handler. `) Y E; |/ ^8 c& h% b DCD DebugMon_Handler ; Debug Monitor Handler DCD 0 ; Reserved DCD PendSV_Handler ; PendSV Handler DCD SysTick_Handler ; SysTick 处理4 n! k. d' `! A8 q# O ; 外部中断开始% ~+ d9 \. O; j. L/ ~ DCD WWDG_IRQHandler ; Window Watchdog DCD PVD_IRQHandler ; PVD through EXTI Line detect DCD TAMPER_IRQHandler ; Tamper' Y- g4 J; f) Y+ t% q DCD RTC_IRQHandler ; RTC* E2 b: l$ m* f, ]8 { DCD FLASH_IRQHandler ; Flash DCD RCC_IRQHandler ; RCC2 A6 w; G" O' Z8 X, G ~ DCD EXTI0_IRQHandler ; EXTI Line 08 {4 A2 N- k% t; l1 J3 f- l2 U& m 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/ u+ O6 Z2 C/ H( n DCD DMA1_Channel2_IRQHandler ; DMA1 Channel 2" H& ?% m/ i+ T, E DCD DMA1_Channel3_IRQHandler ; DMA1 Channel 3; L4 f; J$ p5 o DCD DMA1_Channel4_IRQHandler ; DMA1 Channel 4 DCD DMA1_Channel5_IRQHandler ; DMA1 Channel 51 V Q* O( U- ~$ v7 E% { DCD DMA1_Channel6_IRQHandler ; DMA1 Channel 6 d. X/ }' P2 M1 q DCD DMA1_Channel7_IRQHandler ; DMA1 Channel 79 a) ~# E1 H- K9 M 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+ ?& T! J1 j) y7 }9 r. y DCD CAN1_RX1_IRQHandler ; CAN1 RX1 DCD CAN1_SCE_IRQHandler ; CAN1 SCE; A4 ?8 {2 o4 j5 [8 F6 |+ L DCD EXTI9_5_IRQHandler ; EXTI Line 9..5 DCD TIM1_BRK_IRQHandler ; TIM1 Break DCD TIM1_UP_IRQHandler ; TIM1 Update$ ?% p! O& |7 e( s ~ O DCD TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation a# d- B; O3 P+ X DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare DCD TIM2_IRQHandler ; TIM2 DCD TIM3_IRQHandler ; TIM3- K# `8 m* b, E. M% u- _, M DCD TIM4_IRQHandler ; TIM41 B+ z5 p# p: _% k* ^9 T 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 ; SPI18 a( R3 l& Z, N, z9 { DCD SPI2_IRQHandler ; SPI2 DCD USART1_IRQHandler ; USART1& a% a( z$ _1 t9 I 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 suspend0 J1 P7 q. d6 e- k- R* _. u2 O [ DCD TIM8_BRK_IRQHandler ; TIM8 Break& t0 s. u; O V2 S0 o2 q! I DCD TIM8_UP_IRQHandler ; TIM8 Update) g- C7 B: L3 h0 \- Q" \" ~ DCD TIM8_TRG_COM_IRQHandler ; TIM8 Trigger and Commutation& j I7 }3 M2 g4 n; e" i" Y% e DCD TIM8_CC_IRQHandler ; TIM8 Capture Compare DCD ADC3_IRQHandler ; ADC3' l1 O! @2 l) y8 R DCD FSMC_IRQHandler ; FSMC* }3 E* f6 N# P0 j6 a# w3 W DCD SDIO_IRQHandler ; SDIO" Z2 L% D O9 s( M DCD TIM5_IRQHandler ; TIM5 DCD SPI3_IRQHandler ; SPI3 DCD UART4_IRQHandler ; UART4 J1 C& x+ E4 H0 {+ y; o DCD UART5_IRQHandler ; UART5 DCD TIM6_IRQHandler ; TIM6 DCD TIM7_IRQHandler ; TIM7 DCD DMA2_Channel1_IRQHandler ; DMA2 Channel1# L' E& C8 ?) r# v8 z DCD DMA2_Channel2_IRQHandler ; DMA2 Channel2, f" x# Y6 [# `6 m9 P) W) t DCD DMA2_Channel3_IRQHandler ; DMA2 Channel3. y4 `/ t q8 d7 S x' M DCD DMA2_Channel4_5_IRQHandler ; DMA2 Channel4 & Channel5 __Vectors_End2 U$ L9 C8 p7 ]& X: X6 O ;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。# x8 R6 H( P& g- C' K. p6 p! U7 G ;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。 __Vectors_Size EQU __Vectors_End - __Vectors //向量表大小 ~+ x2 r1 P2 \$ \/ f AREA |.text|, CODE, READONLY ;定义一个.text名称的代码段，只读% `! v( K9 f$ Q3 _ 8 c5 J% f1 Z( L ; 复位处理 Reset_Handler PROC ; PROC-定义子程序与ENDP成对使用) d3 w, {1 _8 X( w 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 IMPORT SystemInit ;声明外部文件，类似于C语言的extern外部声明 LDR R0, =SystemInit BLX R0 ;跳转到SystemInit地址执行5 R- B1 ]4 a- ` LDR R0, =__main# T/ x9 x' H; Z/ C2 B- X+ s, a q BX R0 ;跳转到__main地址执行9 T7 L/ k% s3 e" [% ^ ENDP ;子程序结束5 z% ?! m* P! K6 ^+ a" M ; Dummy Exception Handlers (infinite loops which can be modified)8 | {; R ~) V2 S) e; m/ f 3 \- h z' j! V& Q% D NMI_Handler PROC ;异常处理3 Z+ u+ X: L0 C, \2 a+ @ EXPORT NMI_Handler [WEAK] B . ;无限循环; s$ X1 f7 l! t3 K8 N ENDP HardFault_Handler\8 r, q! y/ e8 m7 e PROC G$ L! Z0 a0 r EXPORT HardFault_Handler [WEAK]4 O, `2 x5 F7 [/ ~7 Z! W% R- r- M6 R7 u B .5 {4 s( E% a; v0 U. n g ENDP! K% C1 @- T5 ]) e$ w4 @" k MemManage_Handler\ PROC( h. e* b# ^5 i6 G: f; b EXPORT MemManage_Handler [WEAK]7 T2 s" D: E. {& ?% | B .& ~9 O/ l! ^8 e+ ~' B ENDP BusFault_Handler\9 [6 Z/ W6 ~' l( \; V `6 k$ R PROC: ?2 a3 H) i2 F- ~8 J, i EXPORT BusFault_Handler [WEAK]4 e: s' x" Y& M! W+ U; C B . ENDP UsageFault_Handler\7 f C4 e+ q3 l/ @$ F+ o PROC% K- X- q; F# [/ y2 K$ A5 ?, O EXPORT UsageFault_Handler [WEAK] B . ENDP. o/ }3 E" a7 o P SVC_Handler PROC EXPORT SVC_Handler [WEAK]0 Z( _2 f$ \/ Y2 t, o$ _/ u9 H: T B . ENDP( W! s9 S2 |1 L- j; m7 P DebugMon_Handler\* U; t9 w1 U) | PROC3 I- o! _" v6 g! E* ?1 m5 S EXPORT DebugMon_Handler [WEAK] B .8 l( e# F( ]2 g5 A6 v ENDP PendSV_Handler PROC# B5 {3 V* T1 l- r- Q: ] EXPORT PendSV_Handler [WEAK]$ R8 ]7 U0 m+ M& D' r B . ENDP SysTick_Handler PROC EXPORT SysTick_Handler [WEAK]/ A* q5 e1 q% a) { B .2 Q1 `9 I6 V+ c% q ENDP 8 M! ~) G* o7 r. N3 S- h Default_Handler PROC4 }% C2 k& A! K4 J) z( S* K# [. O * n+ E7 X( p4 F) R EXPORT WWDG_IRQHandler [WEAK]2 I* ?# |8 C: h O- d2 C EXPORT PVD_IRQHandler [WEAK] EXPORT TAMPER_IRQHandler [WEAK] EXPORT RTC_IRQHandler [WEAK] EXPORT FLASH_IRQHandler [WEAK]# v2 K# s# N; `3 V( H5 C EXPORT RCC_IRQHandler [WEAK] EXPORT EXTI0_IRQHandler [WEAK]/ A, R( D% G: K& l9 U9 D9 v EXPORT EXTI1_IRQHandler [WEAK]8 B- P" z' Z$ A3 e4 Y; B EXPORT EXTI2_IRQHandler [WEAK]# J& k7 \# ?- j$ |4 |0 u* i EXPORT EXTI3_IRQHandler [WEAK] EXPORT EXTI4_IRQHandler [WEAK] EXPORT DMA1_Channel1_IRQHandler [WEAK]0 }) W5 |( W" R* x) P C EXPORT DMA1_Channel2_IRQHandler [WEAK]' h; L8 m! b) _ S/ ?, c) y* d& v EXPORT DMA1_Channel3_IRQHandler [WEAK] EXPORT DMA1_Channel4_IRQHandler [WEAK] EXPORT DMA1_Channel5_IRQHandler [WEAK] EXPORT DMA1_Channel6_IRQHandler [WEAK] EXPORT DMA1_Channel7_IRQHandler [WEAK]" ~7 A5 p/ v' }# W+ S2 X EXPORT ADC1_2_IRQHandler [WEAK]4 l% I. X8 V$ ?5 k- O/ L2 b: n EXPORT USB_HP_CAN1_TX_IRQHandler [WEAK] EXPORT USB_LP_CAN1_RX0_IRQHandler [WEAK]# }0 l r# L2 C) H/ W EXPORT CAN1_RX1_IRQHandler [WEAK]5 I* T! L+ j6 @ EXPORT CAN1_SCE_IRQHandler [WEAK], t- P, _" l* O1 d- r EXPORT EXTI9_5_IRQHandler [WEAK] EXPORT TIM1_BRK_IRQHandler [WEAK]; k" t+ {7 F$ w, Z EXPORT TIM1_UP_IRQHandler [WEAK]. o5 P% \- n2 x EXPORT TIM1_TRG_COM_IRQHandler [WEAK] EXPORT TIM1_CC_IRQHandler [WEAK], D( e4 w; j& B- v6 p, ?: M EXPORT TIM2_IRQHandler [WEAK]! v/ k9 b2 M8 M, S; h4 A" \ EXPORT TIM3_IRQHandler [WEAK]8 j2 R) M1 o, b9 x EXPORT TIM4_IRQHandler [WEAK] EXPORT I2C1_EV_IRQHandler [WEAK]' K0 Q: d) F5 v1 M7 { EXPORT I2C1_ER_IRQHandler [WEAK]% Z! K3 p2 c5 B8 N3 z EXPORT I2C2_EV_IRQHandler [WEAK]4 X& C i+ @6 v! O1 J EXPORT I2C2_ER_IRQHandler [WEAK]5 J [' |: B, d8 t, j/ h& K EXPORT SPI1_IRQHandler [WEAK] C) o- Q5 O" b3 u2 } EXPORT SPI2_IRQHandler [WEAK]6 g5 b8 l: v0 i! Z { EXPORT USART1_IRQHandler [WEAK] EXPORT USART2_IRQHandler [WEAK] EXPORT USART3_IRQHandler [WEAK] EXPORT EXTI15_10_IRQHandler [WEAK] w6 S* C. \ [+ O1 _ EXPORT RTCAlarm_IRQHandler [WEAK]3 d# w8 `# w2 U9 k- ] EXPORT USBWakeUp_IRQHandler [WEAK] EXPORT TIM8_BRK_IRQHandler [WEAK] EXPORT TIM8_UP_IRQHandler [WEAK] EXPORT TIM8_TRG_COM_IRQHandler [WEAK]5 [; |7 m3 r) t6 ]! U" {! a EXPORT TIM8_CC_IRQHandler [WEAK]& a v# }; A5 z6 n8 Z EXPORT ADC3_IRQHandler [WEAK]3 E0 G }" \" Q d+ v$ h EXPORT FSMC_IRQHandler [WEAK] EXPORT SDIO_IRQHandler [WEAK] EXPORT TIM5_IRQHandler [WEAK]# F; a# y3 k' f EXPORT SPI3_IRQHandler [WEAK]( C1 n9 n* I+ \0 R EXPORT UART4_IRQHandler [WEAK] EXPORT UART5_IRQHandler [WEAK]# N. X- Q0 {; e. u EXPORT TIM6_IRQHandler [WEAK]5 W# \8 o: D3 V9 C! H5 l) ` EXPORT TIM7_IRQHandler [WEAK]- W7 m7 h& k9 k7 |" G% N EXPORT DMA2_Channel1_IRQHandler [WEAK] EXPORT DMA2_Channel2_IRQHandler [WEAK]: `) }8 `1 K: O2 O- C8 k. R EXPORT DMA2_Channel3_IRQHandler [WEAK]( z/ Q; k$ h% Z4 y& w* M1 n EXPORT DMA2_Channel4_5_IRQHandler [WEAK]! A1 r) V9 u2 y; b- i3 u$ k WWDG_IRQHandler( E* E+ ~+ i8 N2 V' y PVD_IRQHandler# }/ `/ O( e) R. y/ B4 K- m TAMPER_IRQHandler! ^ D' T7 j5 I( G: U( C RTC_IRQHandler+ ~. Q, B, Z: i+ Z) @6 X& ] FLASH_IRQHandler) e- j2 a+ h( q$ C/ b; A RCC_IRQHandler" Q5 p7 Z: G G+ ~* A" a; a EXTI0_IRQHandler EXTI1_IRQHandler EXTI2_IRQHandler EXTI3_IRQHandler EXTI4_IRQHandler2 y `, s5 b" D1 z: w7 [$ F6 s DMA1_Channel1_IRQHandler DMA1_Channel2_IRQHandler DMA1_Channel3_IRQHandler! C+ g# C! b P" U; i0 C6 W1 a DMA1_Channel4_IRQHandler4 h' `* l$ t" v DMA1_Channel5_IRQHandler/ `0 j' k# X+ ~: }9 J% z, K% I- y DMA1_Channel6_IRQHandler6 i$ Q7 l2 `" k2 \$ v2 [ DMA1_Channel7_IRQHandler ADC1_2_IRQHandler USB_HP_CAN1_TX_IRQHandler USB_LP_CAN1_RX0_IRQHandler CAN1_RX1_IRQHandler: R3 B9 }. E: N; l3 C" c$ J CAN1_SCE_IRQHandler3 O) M6 e ~+ B' t EXTI9_5_IRQHandler TIM1_BRK_IRQHandler TIM1_UP_IRQHandler; |! W+ m P0 V- f g- m TIM1_TRG_COM_IRQHandler. ]6 {( u2 I7 Y/ l' {2 E v4 A' ~ TIM1_CC_IRQHandler |, h& X. [2 V! L; x# l TIM2_IRQHandler TIM3_IRQHandler( @ {8 z, i& Y8 W9 K" ?% B TIM4_IRQHandler" n" e+ E6 O) V& a6 @ I2C1_EV_IRQHandler4 }. I* u6 ?1 X# ]3 ` I2C1_ER_IRQHandler6 l7 ^3 l+ `" J1 V$ }& f I2C2_EV_IRQHandler$ h( L& U! c* q; Q1 `' n( [% m I2C2_ER_IRQHandler' A0 @/ i/ o, N1 ?0 y SPI1_IRQHandler SPI2_IRQHandler9 U4 a* s3 `+ W5 c r* s USART1_IRQHandler USART2_IRQHandler USART3_IRQHandler EXTI15_10_IRQHandler RTCAlarm_IRQHandler9 K) P3 s" w5 l- b USBWakeUp_IRQHandler$ T3 ?! A, v1 O TIM8_BRK_IRQHandler TIM8_UP_IRQHandler9 _4 ~& P. ?" s1 d TIM8_TRG_COM_IRQHandler- O+ L' @' [! c' ~6 `) x TIM8_CC_IRQHandler ADC3_IRQHandler FSMC_IRQHandler SDIO_IRQHandler TIM5_IRQHandler SPI3_IRQHandler: s$ L. s. [2 S" S# r UART4_IRQHandler UART5_IRQHandler7 p4 H7 R2 |8 |) K+ X TIM6_IRQHandler TIM7_IRQHandler: g1 C4 w6 C. l* C DMA2_Channel1_IRQHandler" B/ |2 o; f A DMA2_Channel2_IRQHandler DMA2_Channel3_IRQHandler DMA2_Channel4_5_IRQHandler) X% g( A1 E* o, x B .; v) r2 m* C* R: _" m ENDP- r& ^' c" e- m1 G- o0 Y4 k * ?/ z+ H' U) K( O* D$ A 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 ;******************************************************************************* ; User Stack and Heap initialization ;******************************************************************************* IF : DEF:__MICROLIB ;这个宏在Keil里面开启) h! w- R+ d5 G& M- f3 S0 @ EXPORT __initial_sp ;声明标号5 R1 G% m, [3 m. d3 V8 R EXPORT __heap_base ;声明标号，栈起始地址$ S: D- Z, J# L% r; \' Y" e. [& g+ A EXPORT __heap_limit ;声明标号，栈结束地址 ! f4 S" d, P5 m% N: j% w ELSE * y/ H. E& B- R IMPORT __use_two_region_memory ;这个函数由用户自己实现 EXPORT __user_initial_stackheap ) v* u& _) O1 f3 F' s$ z; d) X __user_initial_stackheap LDR R0, = Heap_Mem LDR R1, =(Stack_Mem + Stack_Size)! r/ d% {0 D8 G LDR R2, = (Heap_Mem + Heap_Size), |" {& g, ~0 S# T( n LDR R3, = Stack_Mem! @* }1 T- N8 q, M$ ~8 O- i' f/ ` BX LR ALIGN ENDIF" v6 s: A P- g7 p3 h END; G, [# _* u4 g- o# w ;******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE***** / f7 p7 M7 _) E6 a4 s: O 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。; O8 t; b) l2 M- [ X9 o # h7 t) `4 _0 W' W 9 Q+ m+ y2 E% B g2 y L( k + W, v* _7 S3 i \5 m4 f$ N& R* B " Y G8 q" H+ K/ } & v% V! G2 |/ Y2 O& V. F : g$ l2 @4 z/ e" T8 @8 T |
STMCU-管管
回答时间：2018-12-6 14:33:31
支持 |
微信公众号
手机版
