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社区首页 >问答首页 >OpenOCD和STM32F7闪烁

问OpenOCD和STM32F7闪烁
EN

Stack Overflow用户
提问于 2020-02-04 10:41:55
回答 1查看 564关注 0票数 1

因此，我有一个非常小的代码，只是看看设备是否还活着。

代码语言：javascript
复制
section .text
.weak Reset_Handler

Reset_Handler:
ldr   r0, =_estack
mov   sp, r0          /* set stack pointer */
ldr   r2, =_sdata

//
b Reset_Handler

根据数据表，flash从0x0800 0000开始在axim总线上运行。这是我的链接文件：

代码语言：javascript
复制
ENTRY(Reset_Handler)

MEMORY
{
  RAM    (xrw)    : ORIGIN = 0x20020000,   LENGTH = 368K
  ROM    (rx)    : ORIGIN = 0x08000000,   LENGTH = 2048K
}

_estack = ORIGIN(RAM)+LENGTH(RAM);


SECTIONS
{
  .text : 
  { 
    . = ALIGN(4);
    *(.text) 
    . = ALIGN(4);
  } > ROM
  
_sidata = LOADADDR(.data);

  .data :
  {
    . = ALIGN(4);
    _sdata = .;
    *(.data)
    . = ALIGN(4);
    _edata = .;
  } > RAM AT> ROM
}

这是我的符号桌，一切看起来都很好：

代码语言：javascript
复制
SYMBOL TABLE:
08000000 l    d  .text  00000000 .text
20020000 l    d  .data  00000000 .data
00000000 l    d  .ARM.attributes        00000000 .ARM.attributes
00000000 l    df *ABS*  00000000 main.o
08000018 g       *ABS*  00000000 _sidata
20020000 g       .data  00000000 _sdata
08000000 g       .text  00000000 Reset_Handler
2007c000 g       .text  00000000 _estack
20020000 g       .data  00000000 _edata

问题是，当我试图用OpenOCD写闪存地址时，它说由于某种原因，在0x1000 0000没有发现闪存银行。当我经营OpenOCD闪存银行时，它说我的闪存从0x0开始。当我写信给0x0时，它会写它。但是当我重新设置我的设备并迈出一步时，它就会停下来，说它现在处于硬故障模式。

这是数据表，第14页，表5。

更新

我使用OpenOCD -> flash write_image保存了以前的固件，当我闪存它以寻址0x0时，设备再次工作。所以一定是关于密码的。

更新2

代码语言：javascript
复制
pen On-Chip Debugger
> flash write_image erase "/home/legion/Desktop/ARM/Assembly/main.elf"
auto erase enabled
wrote 32768 bytes from file /home/legion/Desktop/ARM/Assembly/main.elf in 1.247269s (25.656 KiB/s)

> reset halt
Unable to match requested speed 2000 kHz, using 1800 kHz
Unable to match requested speed 2000 kHz, using 1800 kHz
target halted due to debug-request, current mode: Thread 
xPSR: 00000000 pc: 0xe1a0d000 msp: 0xe3a00004
> step
target halted due to single-step, current mode: Handler HardFault
xPSR: 0x01000003 pc: 0xeafffffa msp: 0xe39fffe0
halted: PC: 0xeafffffa

反汇编

代码语言：javascript
复制
08000000 <Reset_Handler>:
 8000000:       e3a00005        mov     r0, #5
 8000004:       e1a0d000        mov     sp, r0
 8000008:       e51f2000        ldr     r2, [pc, #-0]   ; 8000010 <Reset_Handler+0x10>
 800000c:       eafffffb        b       8000000 <Reset_Handler>
 8000010:       20000000        .word   0x20000000
openocd
assembly
arm
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2020-02-04 11:13:13

试着躺在stm32f7上

flash.ld

代码语言：javascript
复制
MEMORY
{
    fst : ORIGIN = 0x00200000, LENGTH = 0x1000
    rom : ORIGIN = 0x08000000, LENGTH = 0x1000
    ram : ORIGIN = 0x20000000, LENGTH = 0x1000
}
SECTIONS
{
    .text : { *(.text*) } > rom
}

flash.s

代码语言：javascript
复制
.thumb
.thumb_func
.global _start
_start:
stacktop: .word 0x20001000
.word reset
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang
.word hang

.thumb_func
hang:   b .

.thumb_func
reset:
    b hang

arm-none-eabi-as --warn --fatal-warnings -mcpu=cortex-m0 flash.s -o flash.o
arm-none-eabi-ld -o flash.elf -T flash.ld flash.o
arm-none-eabi-objdump -D flash.elf > flash.list

-m0很好，如果您不想使用-m7，可以使用它。

代码语言：javascript
复制
cat flash.list

flash.elf:     file format elf32-littlearm


Disassembly of section .text:

08000000 <_start>:
 8000000:   20001000    andcs   r1, r0, r0
 8000004:   08000043    stmdaeq r0, {r0, r1, r6}
 8000008:   08000041    stmdaeq r0, {r0, r6}
 800000c:   08000041    stmdaeq r0, {r0, r6}
 8000010:   08000041    stmdaeq r0, {r0, r6}
 8000014:   08000041    stmdaeq r0, {r0, r6}
 8000018:   08000041    stmdaeq r0, {r0, r6}
 800001c:   08000041    stmdaeq r0, {r0, r6}
 8000020:   08000041    stmdaeq r0, {r0, r6}
 8000024:   08000041    stmdaeq r0, {r0, r6}
 8000028:   08000041    stmdaeq r0, {r0, r6}
 800002c:   08000041    stmdaeq r0, {r0, r6}
 8000030:   08000041    stmdaeq r0, {r0, r6}
 8000034:   08000041    stmdaeq r0, {r0, r6}
 8000038:   08000041    stmdaeq r0, {r0, r6}
 800003c:   08000041    stmdaeq r0, {r0, r6}

08000040 <hang>:
 8000040:   e7fe        b.n 8000040 <hang>

08000042 <reset>:
 8000042:   e7fd        b.n 8000040 <hang>

向量都是好的(.thumb_func)，地址是好的，这应该能工作。

在openocd源代码构建中：

代码语言：javascript
复制
../src/openocd -f interface/stlink-v2-1.cfg -f target/stm32f7x.cfg

Open On-Chip Debugger 0.10.0+dev-01000-gdb23c13 (2020-01-06-20:09)
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.org/doc/doxygen/bugs.html
WARNING: interface/stlink-v2-1.cfg is deprecated, please switch to interface/stlink.cfg
Info : auto-selecting first available session transport "hla_swd". To override use 'transport select <transport>'.
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 2000 kHz
Info : STLINK V2J28M18 (API v2) VID:PID 0483:374B
Info : Target voltage: 3.252736
Info : stm32f7x.cpu: hardware has 8 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections

在另一个窗口

代码语言：javascript
复制
telnet localhost 4444
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Open On-Chip Debugger
>

然后

代码语言：javascript
复制
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000040 msp: 0x20001000
> halt
> flash write_image erase /path/to/flash.elf
device id = 0x10006451
flash size = 2048 kbytes
Single Bank 2048 kiB STM32F76x/77x found
auto erase enabled
wrote 32768 bytes from file /path/to/flash.elf in 0.771285s (41.489 KiB/s)

>

检查它

代码语言：javascript
复制
> mdw 0x08000000 20
0x08000000: 20001000 08000043 08000041 08000041 08000041 08000041 08000041 08000041 
0x08000020: 08000041 08000041 08000041 08000041 08000041 08000041 08000041 08000041 
0x08000040: e7fde7fe ffffffff ffffffff ffffffff

看上去不错。

代码语言：javascript
复制
> reset
Unable to match requested speed 2000 kHz, using 1800 kHz
Unable to match requested speed 2000 kHz, using 1800 kHz
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000040 msp: 0x20001000
>

看上去不错。

将flash.s .s中的重置处理程序更改为

代码语言：javascript
复制
.thumb_func
reset:
    ldr r0,=0x20000000
    ldr r1,[r0]
    add r1,r1,#1
    str r1,[r0]
    b hang

重新构建，测试它

代码语言：javascript
复制
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000040 msp: 0x20001000
> flash write_image erase /path/to/flash.elf
auto erase enabled
wrote 32768 bytes from file /path/to/flash.elf in 0.772410s (41.429 KiB/s)

> mww 0x20000000 0x12345678
> reset
Unable to match requested speed 2000 kHz, using 1800 kHz
Unable to match requested speed 2000 kHz, using 1800 kHz
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000040 msp: 0x20001000
> mdw 0x20000000
0x20000000: 12345679 

>

现在它装好了，没有动力循环

代码语言：javascript
复制
> reset
Unable to match requested speed 2000 kHz, using 1800 kHz
Unable to match requested speed 2000 kHz, using 1800 kHz
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x08000040 msp: 0x20001000
> mdw 0x20000000
0x20000000: 1234567a 

>

一切看起来都很好。对ITCM的修改

代码语言：javascript
复制
MEMORY
{
    fst : ORIGIN = 0x00200000, LENGTH = 0x1000
    rom : ORIGIN = 0x08000000, LENGTH = 0x1000
    ram : ORIGIN = 0x20000000, LENGTH = 0x1000
}
SECTIONS
{
    .text : { *(.text*) } > fst
}

Disassembly of section .text:

00200000 <_start>:
  200000:   20001000    andcs   r1, r0, r0
  200004:   00200043    eoreq   r0, r0, r3, asr #32
  200008:   00200041    eoreq   r0, r0, r1, asr #32
  20000c:   00200041    eoreq   r0, r0, r1, asr #32

看起来不错

代码语言：javascript
复制
> reset halt
> flash write_image erase /path/to/flash.elf
auto erase enabled
wrote 32768 bytes from file /path/to/flash.elf in 0.769531s (41.584 KiB/s)

> mdw 0x00200000 20
0x00200000: 20001000 00200043 00200041 00200041 00200041 00200041 00200041 00200041 
0x00200020: 00200041 00200041 00200041 00200041 00200041 00200041 00200041 00200041 
0x00200040: 4802e7fe 31016801 e7f96001 20000000 

> mww 0x20000000 0x12345678
> reset
Unable to match requested speed 2000 kHz, using 1800 kHz
Unable to match requested speed 2000 kHz, using 1800 kHz
> halt
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x00200040 msp: 0x20001000
> mdw 0x20000000
0x20000000: 12345679

看起来不错。没问题。

编辑

基于您的编辑和评论

将我的程序改为：

代码语言：javascript
复制
.thumb
.thumb_func
.global _start
_start:
stacktop: .word _estack
.word Reset_Handler

.thumb_func
Reset_Handler:
ldr   r0, =_estack
mov   sp, r0          /* set stack pointer */
ldr   r2, =_sdata

//
b Reset_Handler

并按如下方式使用链接器脚本

代码语言：javascript
复制
Disassembly of section .text:

08000000 <_start>:
 8000000:   2007c000    andcs   r12, r7, r0
 8000004:   08000009    stmdaeq r0, {r0, r3}

08000008 <Reset_Handler>:
 8000008:   4801        ldr r0, [pc, #4]    ; (8000010 <Reset_Handler+0x8>)
 800000a:   4685        mov sp, r0
 800000c:   4a01        ldr r2, [pc, #4]    ; (8000014 <Reset_Handler+0xc>)
 800000e:   e7fb        b.n 8000008 <Reset_Handler>
 8000010:   2007c000    andcs   r12, r7, r0
 8000014:   20020000    andcs   r0, r2, r0

它应该可以启动并正常工作。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/60055604

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