1 前言STSW-STM32116是ST官网基于标准库的针对STM32F0的USART进口IAP示例程序+ p* x) J# Q4 T; Z, Z- {
工程原本是针对STM32F051,本文将介绍如何移植到STM32F070,并针对移植的过程中的问题逐个处理。: Q0 x9 E* H p+ d" k# M
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2 KEIL下移植# i1 ]$ n4 J3 F* {% {7 G6 X1 I9 p# D; z
IAP程序一般分为两个,一个是IAP,一个是APP,IAP存放在内置FLASH的0x8000000的起始位置,而APP则存放在离这个位置一定距离的位置,这个距离一定是大于或等于IAP本身所占空间大小,本例子为0x8003000。
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下载资源后,打开STM32F0xx_AN4065_FW_V1.0.0\Project\STM32F0xx_IAP\下的binary_template工程,这个就是APP工程,首先用KEIL打开,修改device为STM32F070,
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# S& X; ~3 p" ^% F4 P并编译,结果发现原始的公式是编译不过的,如下错误信息:
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从字面上判断为编译system_stm32f0xx.c文件生成的目标文件system_stm32f0xx.o中的数据段(.data)内的RW数据与main.o中的数据在地址0x20000000产生冲突。
( R. o1 S/ x: s' V; n仔细查看代码,发现main函数之前这么一段:8 j& x2 O. \ p% y6 [
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可见代码是要将中断向量表VectorTable强制定义在内存0x20000000上,但是此地址与system_stm32f0xx.c定义的全局变量位置有冲突。于是,需要修改避免冲突。中断向量的地址是固定的,但其他全局变量的地址可以相应地移动下,并且APP的烧录位置为0x8003000,如下图:
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再次编译,错误就会消失了。: J5 N) u) d. O) l9 ]; X
" q3 R5 _, @' ?* k8 ]0 W另外需要将main函数内前面几行代码做些修改:
, [# e( u" {; N+ w- int main(void) 3 J4 X& L2 C( Y6 `' `, e" p
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- uint32_t i = 0; : b! E, e n, \ E
-
7 ]( R/ h% b! ]# e - /*!< At this stage the microcontroller clock setting is already configured,
- n7 a% k+ H2 @% u - this is done through SystemInit() function which is called from startup
4 x" J+ U" [" d& H0 x - file (startup_stm32f0xx.s) before to branch to application main.
5 Z9 h. l2 ]5 B! u- O1 d+ _' w - To reconfigure the default setting of SystemInit() function, refer to
9 f8 q4 s0 I6 y2 U1 W4 V' t7 r3 Z - system_stm32f0xx.c file $ `3 `6 G. d* ]" p H& Q
- */
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- /* Relocate by software the vector table to the internal SRAM at 0x20000000 ***/ 3 s& W- O3 m3 b% `( w& w
-
% [$ C" P" N& t; @* v7 m$ q - /* Copy the vector table from the Flash (mapped at the base of the application 9 V2 ^/ ~' T+ T4 G" K0 S3 p$ s
- load address 0x08003000) to the base address of the SRAM at 0x20000000. */
. \" H& z" Y) l9 `' z% q5 B - for(i = 0; i < 48; i++) ) H1 i- B9 J. s' b" r7 g
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- VectorTable[i] = *(__IO uint32_t*)(APPLICATION_ADDRESS + (i<<2)); . F& W3 C4 k- J0 Q; ]
- }
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- /* Enable the SYSCFG peripheral clock*/ - p! f8 m' ?$ Z2 R9 h6 i8 M
- //RCC_APB2PeriphResetCmd(RCC_APB2Periph_SYSCFG, ENABLE); " b2 ]* s* T7 F2 P! F: k
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); //需要修改成这样 / r2 J4 e6 k8 z6 \- k* G
- /* Remap SRAM at 0x00000000 */
( n g' i1 Y" }( I/ z2 Q5 Y - SYSCFG_MemoryRemapConfig(SYSCFG_MemoryRemap_SRAM);
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- }
复制代码
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打开对应的map文件,有如下内容:
# q4 a. U( D2 C# D4 F- [plain] view plain copy& U& S( M, u" x9 ]
- GPIO_PIN 0x08003470 Data 8 stm320518_eval.o(.constdata)
! r$ g9 i8 }5 ^' k+ { - GPIO_CLK 0x08003478 Data 16 stm320518_eval.o(.constdata)
Y3 {+ n* c7 h/ p# u9 s, T - BUTTON_PIN 0x08003488 Data 14 stm320518_eval.o(.constdata) 9 B' S' F' z. n( z e- h
- BUTTON_CLK 0x08003498 Data 28 stm320518_eval.o(.constdata) 8 P+ s" T' `* @0 L7 _
- BUTTON_EXTI_LINE 0x080034b4 Data 14 stm320518_eval.o(.constdata)
7 P: B/ t; S) B# o# [ - BUTTON_PORT_SOURCE 0x080034c2 Data 14 stm320518_eval.o(.constdata) % {2 e8 q, P \5 Q" i
- BUTTON_PIN_SOURCE 0x080034d0 Data 14 stm320518_eval.o(.constdata) 9 ]& F5 K2 B1 u3 m
- BUTTON_IRQn 0x080034de Data 14 stm320518_eval.o(.constdata) - w) m# N* ?4 y0 `7 I: x2 ~6 ~, r9 e
- COM_USART_CLK 0x080034ec Data 4 stm320518_eval.o(.constdata) 1 ^1 W4 H1 @. Z& r) }( X3 X" b
- COM_TX_PORT_CLK 0x080034f0 Data 4 stm320518_eval.o(.constdata)
, z4 F7 i5 K+ k3 P( U" n9 w - COM_RX_PORT_CLK 0x080034f4 Data 4 stm320518_eval.o(.constdata) 8 |) K5 [& A% O: v
- COM_TX_PIN 0x080034f8 Data 2 stm320518_eval.o(.constdata) . m& ^4 i* y0 v8 B# h/ w+ _% Q
- COM_RX_PIN 0x080034fa Data 2 stm320518_eval.o(.constdata) ' y( R0 y# v& i( ~$ i
- COM_TX_PIN_SOURCE 0x080034fc Data 2 stm320518_eval.o(.constdata)
0 Q1 e1 b1 v- P) @ - COM_RX_PIN_SOURCE 0x080034fe Data 2 stm320518_eval.o(.constdata)
U# v+ B9 G1 b4 G" k5 m. T - COM_TX_AF 0x08003500 Data 2 stm320518_eval.o(.constdata) , W# C1 N1 [) p8 H
- COM_RX_AF 0x08003502 Data 2 stm320518_eval.o(.constdata)
8 A! `& h8 |9 S% |& [( o - Region
8 ]- w' C8 v- }. v - Base 0x08003504 Number 0 anon( Z& f! d# _" S, w
- Table) - P8 I- Y, ~8 c2 t7 O+ q3 x+ k
- Region
k0 M% B. w5 z: c6 x - Limit 0x08003524 Number 0 anon
; B# t7 e7 u% g9 l - Table) 4 c9 w1 h. i3 Z7 ~" K2 `
- VectorTable 0x20000000 Data 192 main.o(.ARM.__AT_0x20000000) //向量表位置为0x20000000
7 L! l# X" E/ c- J8 B+ K - SystemCoreClock 0x200000c0 Data 4 system_stm32f0xx.o(.data) //其他全局变量的起始位置为0x200000C0 , V4 ]' L T' ]% W
- AHBPrescTable 0x200000c4 Data 16 system_stm32f0xx.o(.data)
. g4 o4 m. o2 t8 e3 i1 n8 H( U - GPIO_PORT 0x200000d4 Data 16 stm320518_eval.o(.data)
+ O+ U: A; u0 g - BUTTON_PORT 0x200000e4 Data 28 stm320518_eval.o(.data)
" a- Q& m1 _9 Y; B - COM_USART 0x20000100 Data 4 stm320518_eval.o(.data) 7 o4 J% E$ o) b6 H
- COM_TX_PORT 0x20000104 Data 4 stm320518_eval.o(.data) ) P1 r( i7 w7 O0 y( F
- COM_RX_PORT 0x20000108 Data 4 stm320518_eval.o(.data)
6 B& b3 A% u4 X& ]. y X6 Z7 n8 V - __initial_sp 0x20000510 Data 0 startup_stm32f0xx.o(STACK)
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如上所述,中断向量表被编译在0x20000000,内存的起始位置,而system_stm32f0xx.c下的全局变量SystemCoreClock被KEIL编译成放在紧挨着的0x200000C0的位置,与预期完全相符。分别将IAP与APP烧录进FLASH,测试可以正常运行。, k' r% w2 I5 L; u/ b6 L6 W. ]
8 r! l$ ~" N1 Z注:在KEIL下,必须存在IAP才能调试APP!,这点是与IAR不同的。/ I3 V* w$ A! c q
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3 IAR下移植* z) V: A' ?. X. R1 p" e
在IAR下的IAP没有什么特殊的,主要还是看APP的配置。 使用IAR打开APP工程,修改device为STM32F070: & A& f1 b: t H* n" v
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链接配置: 中断向量表:
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内存映射:
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如上,APP存放在FLASH的位置0x8003000,内存还是设置为:0x20000000. 编译后,打开对应的map文件如下所示: - Entry Address Size Type Object ) c5 J4 D6 n, t5 g$ |: C" a
- ----- ------- ---- ---- ------
+ o, p2 U, S1 U2 v- e4 Z g - .iar.init_table$Base 0x080034fc -- Gb - Linker created -
: U* O/ F2 n/ D; K - .iar.init_table$Limit 0x08003510 -- Gb - Linker created -
9 X+ X3 n, q% k4 a- |" o& R - ?main 0x08003511 Code Gb cmain.o [4]
1 H3 c3 n) T3 ]9 q1 Q! r2 d - CSTACK$Base 0x200000d8 -- Gb - Linker created - ( ?6 ~) f( k& @7 {/ p1 {
- CSTACK$Limit 0x200010d8 -- Gb - Linker created - * g7 O' H4 D3 N" x6 Z
- Delay 0x080031e3 0x10 Code Gb main.o [1] % R" K: @1 m! B) ?; C" h9 j7 |: U
- GPIO_PIN 0x080035a0 0x8 Data Gb stm320518_eval.o [1] : ~* E1 u( i/ |
- GPIO_PORT 0x200000c0 0x10 Data Gb stm320518_eval.o [1] //stm320518_eval.c文件内的全局变量GPIO_PORT数组存放在0x200000c0
R) ?& X# j* R4 _8 u/ q" e" N; \8 R5 [ - HardFault_Handler 0x08003573 0x4 Code Gb stm32f0xx_it.o [1]
7 {) [; O# W ]6 S - NMI_Handler 0x08003571 0x2 Code Gb stm32f0xx_it.o [1] ! y* G9 D2 d3 \5 N
- NVIC_SetPriority 0x080030c1 0x84 Code Lc main.o [1] : C+ U9 {, i7 v$ @2 Y
- PendSV_Handler 0x08003579 0x2 Code Gb stm32f0xx_it.o [1]
# ~& [% n& c% {* N+ N( S* C. G1 N - RCC_APB2PeriphClockCmd 0x08003229 0x20 Code Gb stm32f0xx_rcc.o [1]
/ y1 E- y& [8 p+ J6 r( e& h& }- t - Region
5 h$ j6 u; ?0 L4 Q: q# `5 N - Base 0x080034fc -- Gb - Linker created - * _, M+ K B4 }; B1 ^- \2 g# l- E
- Region# @! g8 W4 A3 L& S) a
- Limit 0x08003510 -- Gb - Linker created - / k1 ]7 J3 z3 ^2 b Z, ?
- STM_EVAL_LEDToggle 0x08003315 0x26 Code Gb stm320518_eval.o [1]
: j4 y/ m, H5 ^1 _ - SVC_Handler 0x08003577 0x2 Code Gb stm32f0xx_it.o [1]
' N5 R* K# n1 M* i. w - SYSCFG_MemoryRemapConfig
; P% v( e2 R) @( s/ T - 0x0800324d 0x14 Code Gb stm32f0xx_syscfg.o [1] 6 G7 Q# K1 B7 [6 J
- SetSysClock 0x080033b7 0xbe Code Lc system_stm32f0xx.o [1] . c, _' S1 O) e9 |4 }
- SysTick_Config 0x08003145 0x32 Code Lc main.o [1]
; \. q5 [1 }( j. }# X" B - SysTick_Handler 0x0800357b 0x8 Code Gb stm32f0xx_it.o [1]
, k2 o) i2 m F/ r - SystemCoreClock 0x200000d0 0x4 Data Gb system_stm32f0xx.o [1]
$ u( T% b" v" i0 t# m- ]0 F. t) E - SystemInit 0x08003349 0x6e Code Gb system_stm32f0xx.o [1]
2 h0 ]2 G7 G, T$ H( X - TimingDelay 0x200000d4 0x4 Data Lc main.o [1]
7 u. H& T8 S0 ?1 x* S5 v2 e9 U. x - TimingDelay_Decrement 0x080031f3 0x16 Code Gb main.o [1]
; W1 o' T) J: I - VectorTable 0x20000000 0xc0 Data Gb main.o [1] //向量表编译位置为0x20000000 8 z8 |$ m! T; ~' y0 z
- __aeabi_idiv0 0x08003345 Code Gb IntDivZer.o [4]
& C9 r9 `0 c# U2 r5 _/ V9 x - __aeabi_uidiv 0x08003265 Code Gb I32DivModFast.o [4]
+ h( Z+ v' y+ R& y) i$ r - __aeabi_uidivmod 0x08003265 Code Gb I32DivModFast.o [4]
; d6 d' [0 I6 V) M - __cmain 0x08003511 Code Gb cmain.o [4] ?# ^7 w( w, x' Z
- __exit 0x08003545 0x14 Code Gb exit.o [5]
; ~7 T5 K9 B8 K P4 d9 W1 ~2 I1 E - __iar_copy_init3 0x080034a5 0x30 Code Gb copy_init3.o [4] : F* y" |* g6 h g- v# T% {, d
- __iar_data_init3 0x080034d5 0x28 Code Gb data_init.o [4]
* F+ S; L* m- ]" s9 k8 |1 v - __iar_program_start 0x08003595 Code Gb cstartup_M.o [4]
/ J. v& i: f$ u$ |( x1 G - __low_level_init 0x0800352b 0x4 Code Gb low_level_init.o [3]
/ y; x" f$ _' C+ }" U' g& ]4 W7 i - __vector_table 0x08003000 Data Gb startup_stm32f0xx.o [1] * v9 h3 y6 A; h
- _call_main 0x0800351d Code Gb cmain.o [4]
8 n$ W( _0 `7 A - _exit 0x08003539 Code Gb cexit.o [4]
0 w! g; H) V8 X; u - _main 0x08003527 Code Gb cmain.o [4]
8 t' \( l. q- R5 Q' V. {5 W - exit 0x0800352f 0x8 Code Gb exit.o [3]
8 h* H' ^1 s- j) ^6 w( p8 o - main 0x08003177 0x6c Code Gb main.o [1]
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: `; z: e& H3 j4 W如上所示,在IAR编译下,中断向量表被编译在0x20000000,内存的起始位置,而stm320518_eval.c下的全局变量GPIO_PORT被IAR编译成放在紧挨着的0x200000C0的位置。分别将IAP与APP烧录进FLASH,测试可以正常运行。& b. v2 l3 W# X0 o% Y* Y
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注:从IAR工程的链接配置来看,并没有像KEIL那样配置RAM位置为:0x2000000,编译后的结果向量表也不会与其他全局变量相冲突,可见IAR编译器已经自动计算并避免这种冲突,不像KEIL那样会出现链接错误,以此来提示用户。
1 p6 M3 _0 o6 z9 U! g- n另外:在IAR下,在不存在IAP的情况下也是可以调试APP的,这点是KEIL所不具备的功能,看样子,IAR在细节的处理上比KEIL要好。 ; F5 o$ v7 P& a
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