【OK210试用体验】u--boot篇 -- 添加boot menu - 在线问答 - 电子技术论坛 - 最好最受欢迎电子论坛!

【OK210试用体验】u--boot篇 -- 添加boot menu

【OK210试用体验】u--boot篇 -- 添加boot menu


    u-boot启动过程中可以添加菜单,用来方便地实现不同的功能。添加这个功能,在顶层doc/README.bootmenu有详细的讲解。

    要使能bootmenu功能,需要在include/configs/smdkv210.h中定义2个宏。
  1. #define CONFIG_CMD_BOOTMENU
  2. #define CONFIG_MENU
复制代码
   在启动的时候要运行
bootmenu,需要定义
  1. #define CONFIG_AUTOBOOT_KEYED
  2.   #define CONFIG_BOOTDELAY 30
  3.   #define CONFIG_MENU_SHOW
复制代码
   其中
CONFIG_BOOTDELAY是显示菜单的时长,并且已经默认定义好为3。 1.png 2.png

    菜单中的内容,可以用如下格式来设置:
  1. bootmenu_delay=
  2.   bootmenu_="<title>=
复制代码
   这是第一次进入菜单的自动计时时间。

    是boot menu的进入编号,从零开始。

    是在console或者boot屏显示的内容。</font></font></div><br /> <div align="left"><font style="background-color:rgb(247, 247, 247)"><font size="3">    <</font></font><font size="3">commands</font><font style="background-color:rgb(247, 247, 247)"><font size="3">>是菜单<title>对应的执行命令。</font></font></div><br /> <div align="left"><font style="background-color:rgb(247, 247, 247)"><font size="3">    设置这些命令用setev命令,操作菜单的时候用键盘的up/dowm还有enter,选中时有高亮显示。一开始进入菜单,延迟结束后u-boot立即执行第一个菜单命令,可以按ESC或者Q键退出延迟计数,一直显示菜单,直到用户选择某个命令。</font></font></div><br /> <div align="left"><font style="background-color:rgb(247, 247, 247)"><font size="3">    <ignore_js_op> <img src="data/attachment/forum/201509/13/210036kdmebjdmz5j2deme.png" alt="3.png" title="3.png" /> </ignore_js_op> </font></font></div><br /> <div align="left"><font style="background-color:rgb(247, 247, 247)"><font size="3">    开始进入是这样子,等待几秒后就会进入自己的菜单。设置完自己的菜单后需要按下reset。</font></font></div><br /> <div align="left"><font style="background-color:rgb(247, 247, 247)"><font size="3">    设置例子:<div class="blockcode"><div id="code_k7N"><ol><li>setenv bootmenu_0 Boot 1. kernel=bootm 0x82000000  # Set first menu entry<br /> <li>  setenv bootmenu_1 Boot 2. kernel=bootm 0x83000000  # Set second menu entry<br /> <li>  setenv bootmenu_2 Reset board=reset                # Set third menu entry<br /> <li>  setenv bootmenu_3 U-Boot boot order=boot           # Set fourth menu entry<br /> <li>  bootmenu 20        # Run bootmenu with autoboot delay 20s</ol></div><em onclick="copycode($('code_k7N'));">复制代码</em></div>   显示情况: <ignore_js_op> <img src="data/attachment/forum/201509/13/211024pquj8624o9qd9o46.png" alt="4.png" title="4.png" /> </ignore_js_op> </font></font></div><br /> <br /> </div> </td> </tr> </table> <!--增加结束--> </div> <div class="cl"> <div id="comment_3821542" class="cm" style="padding-left:5px;"> </div> <div id="post_rate_div_3821542"></div> </div> </div> </div> </td> </tr> <tr> <td class="plc plm"> <!-- 标签 --> <!--end 标签 --> <div class="a_pb"><a 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