Keil5.15使用GCC编译器编译STM32工程

我们使用Keil一般使用ARMCC编译MCU工程代码.其实,Keil也是支持内嵌GCC编译器的.我们可以使用GCC来编译我们的工程代码.

一、下载GCC编译器

GCC编译器下载地址 

二、安装GCC

我们可以把GCC解压到keil的安装目录下面.如下图

三、配置Keil使用GCC编译器

1、配置CC编译规则,Misc Controls 填写

-mcpu=cortex-m4 -mthumb -fdata-sections -ffunction-sections 

2、Assembler中规则,Misc Controls 填写

-mcpu=cortex-m4 -mthumb 

3、Linker中填写,Misc Controls 填写

-Wl,–gc-sections

-Wl,–gc-sections 这个主要是要把没有调用的函数不编译到hex中 

注意:对于-mcpu=cortex-m4这个,如果你使用的是m3的芯片,则修改成-mcpu=cortex-m3

4、STM32F405NI_FLASH.ld的代码参考

<code class="hljs applescript has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">/*
*****************************************************************************
**
**  File        : stm32_flash.ld
**
**  Abstract    : Linker <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">script</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> STM32F407VG Device <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">with</span>
**                <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1024</span>KByte FLASH, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">128</span>KByte RAM
**
**                Set heap size, stack size <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">and</span> stack location according
**                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> <span class="hljs-type" style="box-sizing: border-box;">application</span> requirements.
**
**                Set memory bank area <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">and</span> size <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> external memory <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> used.
**
**  Target      : STMicroelectronics STM32
**
**  Environment : Atollic TrueSTUDIO(R)
**
**  Distribution: The <span class="hljs-type" style="box-sizing: border-box;">file</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> distributed 揳s <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span>,?<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">without</span> any warranty
**                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> any kind.
**
**  (c)Copyright Atollic AB.
**  You may use this <span class="hljs-type" style="box-sizing: border-box;">file</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">as</span>-<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">or</span> modify <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">it</span> according <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> needs <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> your
**  project. This <span class="hljs-type" style="box-sizing: border-box;">file</span> may only be built (assembled <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">or</span> compiled <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">and</span> linked)
**  using <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> Atollic TrueSTUDIO(R) product. The use <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> this <span class="hljs-type" style="box-sizing: border-box;">file</span> together
**  <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">with</span> other tools than Atollic TrueSTUDIO(R) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">not</span> permitted.
**
*****************************************************************************
*/

/* Entry Point */
ENTRY(Reset_Handler)

/* Highest address <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> user mode stack */
_estack = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x2001FFFF</span>;    /* <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">end</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> RAM */

/* Generate a link <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">error</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> heap <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">and</span> stack don't fit <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">into</span> RAM */
_Min_Heap_Size = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x400</span>;      /* required amount <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> heap  */
_Min_Stack_Size = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x800</span>; /* required amount <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">of</span> stack */

/* Specify <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> memory areas */
MEMORY
{
FLASH (rx)      : ORIGIN = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x8000000</span>, LENGTH = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1024</span>K
RAM (xrw)      : ORIGIN = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x20000000</span>, LENGTH = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">128</span>K
CCMRAM (rw)      : ORIGIN = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0x10000000</span>, LENGTH = <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">64</span>K
}

/* Define output sections */
SECTIONS
{
  /* The startup code goes <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">first</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">into</span> FLASH */
  .isr_vector :
  {
    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    KEEP<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(.isr_vector)) /* Startup code */
    . = ALIGN(4);
  } >FLASH

  /* The program code and other data goes into FLASH */
  .text :
  {
    . = ALIGN(4);
    *(.text)           /* .text sections (code) */
    *(.text*)</span>          /* .<span class="hljs-type" style="box-sizing: border-box;">text</span>* sections (code) */
    *(.glue_7)         /* glue arm <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> thumb code */
    *(.glue_7t)        /* glue thumb <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> arm code */
    *(.eh_frame)

    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(.init))
    KEEP <span class="hljs-comment" style="box-sizing: border-box;">(*(.fini))

    . = ALIGN(4);
    _etext = .;        /* define a global symbols at end of code */
  } >FLASH

  /* Constant data goes into FLASH */
  .rodata :
  {
    . = ALIGN(4);
    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
    *(.rodata*)</span>        /* .rodata* sections (constants, strings, etc.) */
    . = ALIGN(4);
  } >FLASH

  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*)</span> } >FLASH
  .ARM : {
    __exidx_start = .;
    *(.ARM.exidx*)
    __exidx_end = .;
  } >FLASH

  .preinit_array     :
  {
    PROVIDE_HIDDEN (__preinit_array_start = .);
    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(.preinit_array*)</span>)
    PROVIDE_HIDDEN (__preinit_array_end = .);
  } >FLASH
  .init_array :
  {
    PROVIDE_HIDDEN (__init_array_start = .);
    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(SORT(.init_array.*)</span>))
    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(.init_array*)</span>)
    PROVIDE_HIDDEN (__init_array_end = .);
  } >FLASH
  .fini_array :
  {
    PROVIDE_HIDDEN (__fini_array_start = .);
    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(SORT(.fini_array.*)</span>))
    KEEP <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">(*(.fini_array*)</span>)
    PROVIDE_HIDDEN (__fini_array_end = .);
  } >FLASH

  /* used <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">by</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> startup <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> initialize data */
  _sidata = LOADADDR(.data);

  /* Initialized data sections goes <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">into</span> RAM, load LMA <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">copy</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">after</span> code */
  .data : 
  {
    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    _sdata = .;        /* create a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> data start */
    *(.data)           /* .data sections */
    *(.data*)          /* .data* sections */

    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    _edata = .;        /* define a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> data <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">end</span> */
  } >RAM AT> FLASH

  _siccmram = LOADADDR(.ccmram);

  /* CCM-RAM section 
  * 
  * IMPORTANT NOTE! 
  * If initialized variables will be placed <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span> this section, 
  * <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> startup code needs <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> be modified <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">copy</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> init-values.  
  */
  .ccmram :
  {
    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    _sccmram = .;       /* create a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> ccmram start */
    *(.ccmram)
    *(.ccmram*)

    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    _eccmram = .;       /* create a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> ccmram <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">end</span> */
  } >CCMRAM AT> FLASH


  /* Uninitialized data section */
  . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
  .bss :
  {
    /* This <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> used <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">by</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> startup <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">in</span> order <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> initialize <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> .bss secion */
    _sbss = .;         /* define a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> bss start */
    __bss_start__ = _sbss;
    *(.bss)
    *(.bss*)
    *(COMMON)

    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    _ebss = .;         /* define a <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">global</span> symbol <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">at</span> bss <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">end</span> */
    __bss_end__ = _ebss;
  } >RAM

  /* User_heap_stack section, used <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">to</span> check <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">that</span> there <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> enough RAM left */
  ._user_heap_stack :
  {
    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
    PROVIDE ( <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">end</span> = . );
    PROVIDE ( _end = . );
    . = . + _Min_Heap_Size;
    . = . + _Min_Stack_Size;
    . = ALIGN(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">4</span>);
  } >RAM



  /* Remove information <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">from</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">the</span> standard libraries */
  /DISCARD/ :
  {
    libc.a ( * )
    libm.a ( * )
    libgcc.a ( * )
  }

  .ARM.attributes <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> : { *(.ARM.attributes) }
}
</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; 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padding: 0px 5px;">182</li><li style="box-sizing: border-box; padding: 0px 5px;">183</li><li style="box-sizing: border-box; padding: 0px 5px;">184</li><li style="box-sizing: border-box; padding: 0px 5px;">185</li><li style="box-sizing: border-box; padding: 0px 5px;">186</li><li style="box-sizing: border-box; padding: 0px 5px;">187</li></ul>

从我粘贴的代码中,可以知道我是从STM32F407VG这个芯片的配置文件中拷贝过来的.

四、修改启动代码,使用GCC专用的.S文件

由于GCC与ARMCC的汇编代码格式不相同,不信你可以用比较工具看一下支持GCC的.S与支持ARMCC的.S写法是否一样.
那么我们需要重新写支持GCC的.S的启动代码吗?当然不需要,因为ST的已经为我们写好了.
如,我使用的gcc路径

D:\Code\project\Library\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7

五、配置完毕，编译程序排除解决相关错误

如果你使用到一些标准的C 库函数,如spirntf这些东西,或者你会报如下错误.

C:/Keil_v5/ARM/GCC/bin/../lib/gcc/arm-none-eabi/4.7.4/../../../../arm-none-eabi/lib/armv7e-m\libg.a(lib_a-sbrkr.o): In function _sbrk_r': 
sbrkr.c:(.text._sbrk_r+0xc): undefined reference to_sbrk’ 
collect2.exe: error: ld returned 1 exit status

对与该问题的解决方法可以参考如下链接: 解决`_sbrk’错误的方法

这个链接主要告诉我们,如果有使用标准的C 函数,则要包含syscall.c 这个文件.

那么这个文件在哪里可以找到呢? 
在Keil的pack文件目录下可以根据自己的芯片类型找到.如我的路径:

C:\Keil_v5\ARM\Pack\Keil\STM32F4xx_DFP\2.5.0\Projects\STM32F4-Discovery\Examples\BSP\SW4STM32

那么此时,编译代码即可,原来的错误已经没有了.

至于如何设置JLINK及ST-LINK作为调试,这个跟使用ARMCC一样设置.这里大家可以在网上找一些教程,这里就不再介绍了.

来自:http://blog.youkuaiyun.com/lan120576664

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