dave:嵌入式设备通过semihost机制输出调试信息到调试主机

r囧r小猫 2022-05-16 04:52 284阅读 0赞

## 简介 ##

`semihost` 是arm的一种机制，把运行设备的输入输出请求传递给运行调试器的主机，利用这种机制，可以使用主机的屏幕和键盘，而不用在嵌入式目标系统上使用屏幕和键盘。可以使用此机制启用C库中的函数，例如printf（）和scanf（）

下面的例子是printf打印到调试窗口，工具为`DAVEv4`，其他版本的可能不一样些

1.  新建工程  
    ![这里写图片描述][70]
2.  新建调试配置，使能Semihosting  
    ![这里写图片描述][70 1]
3.  打开semihost输出窗口  
    ![这里写图片描述][70 2]
4.  修改工程属性中的 “C/c++ Build” - “ARM-GCC C Linker” -” miscellaneous”-“Other flags” 选项  
    \-specs=rdimon.specs

![这里写图片描述][70 3]

1.  添加初始化代码

/* * main.c * * Created on: 2018 Aug 16 09:51:30 * Author: ink */
    
    
    
    #include <xmc_common.h>
    #include <stdio.h>
    
    /** * @brief main() - Application entry point * * <b>Details of function</b><br> * This routine is the application entry point. It is invoked by the device startup code. */
    extern void initialise_monitor_handles(void);
    
    int main(void)
    {
    
        initialise_monitor_handles();
    
      /* Placeholder for user application code. The while loop below can be replaced with user application code. */
      while(1U)
      {
          printf("semihost:output to console\n");
      }
    }

1.  调试运行，printf就能输出到semihost console窗口  
    ![这里写图片描述][70 4]

## 示例工程 ##

[https://download.csdn.net/download/x356982611/10607743][https_download.csdn.net_download_x356982611_10607743]

## 引用 ##

> [https://www.infineonforums.com/threads/3489-DAVE-TIP-of-the-day-Semihosting-in-DAVEv4?tdsourcetag=s\_pctim\_aiomsg][https_www.infineonforums.com_threads_3489-DAVE-TIP-of-the-day-Semihosting-in-DAVEv4_tdsourcetag_s_pctim_aiomsg]  
> [https://blog.csdn.net/x356982611/article/details/81713760][https_blog.csdn.net_x356982611_article_details_81713760]

[70]: /images/20220516/2a8b931c7d6d4a01b72d04bf39a09ac3.png
[70 1]: /images/20220516/25495d0e7f5b461296d091e5deb109b9.png
[70 2]: /images/20220516/4257db616816476fb81b62d1e3de6b01.png
[70 3]: /images/20220516/2935d1ce1bf4405cac623217ca9c4900.png
[70 4]: /images/20220516/ce46ebfd843a4409ae25812d6b74b3a1.png
[https_download.csdn.net_download_x356982611_10607743]: https://download.csdn.net/download/x356982611/10607743
[https_www.infineonforums.com_threads_3489-DAVE-TIP-of-the-day-Semihosting-in-DAVEv4_tdsourcetag_s_pctim_aiomsg]: https://www.infineonforums.com/threads/3489-DAVE-TIP-of-the-day-Semihosting-in-DAVEv4?tdsourcetag=s_pctim_aiomsg
[https_blog.csdn.net_x356982611_article_details_81713760]: https://blog.csdn.net/x356982611/article/details/81713760