keil MDK error: L6236E: No section matches selector - no section 错误

　　今天板子刚到，新建的第一个工程就报错了。

　　.\Objects\cse.sct(7): error: L6236E: No section matches selector - no section to be FIRST/LAST.

　　网上查了一下说什么启动文件没添加，可是他们都没说在哪添加启动文件，我第一次搞这个我也不知道。

　　这时我在stackoverflow里搜到了这个问题。

　　题主遇到的问题和我遇到的一样，然后下边有答主这样说：

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There is no 'FIRST' object in your source code. Your scatter file likely looks something like:

LR_IROM1 0x08000000 0x00040000  {    ; load region size_region
  ER_IROM1 0x08000000 0x00040000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  RW_IRAM1 0x20000000 0x0000A000  {  ; RW data
   .ANY (+RW +ZI)
  }

　　

　　

The _FIRST object that the linker wants to put into the image is the area called RESET. You do not have a RESET region in your code. Add something along the lines of

AREA    RESET, DATA, READONLY

　　

　　to your assembly file where you want execution to begin.

　　Create a project with the startup file and look for the AREA RESET ..... declaration and copy that.

　　For Cortex it looks like:

   AREA    RESET, DATA, READONLY
                EXPORT  __Vectors
                EXPORT  __Vectors_End
                EXPORT  __Vectors_Size

__Vectors       DCD     __initial_sp               ; Top of Stack
                DCD     Reset_Handler              ; Reset Handler
                DCD     NMI_Handler                ; NMI Handler
                DCD     HardFault_Handler          ; Hard Fault Handler
                DCD     MemManage_Handler          ; MPU Fault Handler
                DCD     BusFault_Handler           ; Bus Fault Handler
                DCD     UsageFault_Handler         ; Usage Fault Handler
                DCD     0     

　　

　　Each of those handlers needs to be declared, but you can just add the stack pointer and reset handler to get started.

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我是看到这一段代码在startup里边，把这个模块一添加，然后就好了。

也就是添加 AREA    RESET, DATA, READONLY 这一句到启动文件对应的位置。