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Bearpi-HM-Micro开机自启动程序

 1 year ago
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项目开发需要联网传输数据，每次开机都要事先运行WiFi程序。于是想办法能不能板子开机的时候就能自动启动运行WiFi程序，不需要每次都命令行输入。

2、开发例程

（1）准备工作

找到启动WiFi的程序，文件目录：/home/nebula/bearpi/bearpi-hm_micro_small/applications/BearPi/BearPi-HM_Micro/samples/communication/wpa_supplicant/src/wpa_sample.c。

以下代码为主函数代码：

int main(int argc, char *argv[])
{
    printf("------------------------\n");
    printf("------------------------\n");
    printf("------------------------\n");
    printf("--------test------------\n");
    printf("------------------------\n");
    printf("------------------------\n");
    printf("------------------------\n");

    g_wpaArgc = argc;
    for (int i = 0; i < g_wpaArgc; i++)
    {
        g_wpaArg[i] = argv[i];
    }
    sleep(30);
    g_wpaArgc = 5;
    g_wpaArg[0] = "-i";
    g_wpaArg[1] = "wlan0";
    g_wpaArg[2] = "-d";
    g_wpaArg[3] = "-c";
    g_wpaArg[4] = "/etc/wpa_supplicant.conf";

    int ret = pthread_create(&g_wpaThread, NULL, ThreadMain, NULL);
    if (ret != 0)
    {
        printf("[WpaSample]create thread failed error:%s.\n", strerror(ret));
        return 1;
    }
    pthread_join(g_wpaThread, NULL);
    return 0;
}

依照官方执行WiFi程序的命令./bin/wpa_supplicant -i wlan0 -d -c /etc/wpa_supplicant.conf，把程序写死

特别注意：经过后期的教训终结，一定要 sleep(30)，等待开发板初始化网卡才能连接。

【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区

（2）查找资料&确定方向

​​干货！openharmony L1级开机启动项服务设置​​从启动日志简单梳理Openharmony启动流程。

虽然没有找到完全适合Micro的，但都是OpenHarmony的架构，大同小异。

【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区

可以发现配置开机启动项是在代码根目录下的vender(内核)文件夹里配置的。找到含有类似init_config.cfg.的文件名。

具体在Bearpi-Micro的详细地址如下：vendor/bearpi/bearpi_hm_micro/init_configs/。

【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区

好了，问题来了，这两个除了名字不一样，内容一模一样的文件到底该改哪一个？

经过大量的试错（修改了八九次）发现只能修改init_bearpi_hm_micro.cfg这个文件。

详细的配置如下：

{
    "jobs" : [{
            "name" : "pre-init",
            "cmds" : [
                "mkdir /storage/data/log",
                "chmod 0755 /storage/data/log",
                "chmod 0777 /dev/hdf",
                "chown 4 4 /storage/data/log",
                "mkdir /storage/data/softbus",
                "mkdir /sdcard",
                "chmod 0777 /sdcard",               
                "start foundation",
                "start bundle_daemon",
                "start appspawn",
                "start wms_server",
                "start shell"
            ]
       }, {
            "name" : "init",
            "cmds" : [
                "start apphilogcat",
                "start wpa_supplicant"
            ]
       }, {
            "name" : "post-init",
            "cmds" : [
                "chown 0 99 /dev/hdf",
                "chown 0 99 /dev/hdf/dev_mgr",
                "chown 0 99 /dev/hdf/hdfwifi",
                "chown 0 99 /dev/gpio",
                "chown 0 99 /dev/i2c-0",
                "chown 0 99 /dev/i2c-1",
                "chown 0 99 /dev/i2c-2",
                "chown 0 99 /dev/i2c-3",
                "chown 0 99 /dev/i2c-4",
                "chown 0 99 /dev/i2c-5",
                "chown 0 99 /dev/i2c-6",
                "chown 0 99 /dev/i2c-7",
                "chown 0 99 /dev/uartdev-0",
                "chown 0 99 /dev/uartdev-1",
                "chown 0 99 /dev/uartdev-2",
                "chown 0 99 /dev/uartdev-3",
                "chown 0 99 /dev/spidev0.0",
                "chown 0 99 /dev/spidev1.0",
                "chown 0 99 /dev/spidev2.0",
                "chown 0 99 /dev/spidev2.1"
         ]
        }
    ],
    "services" : [{
            "name" : "foundation",
            "path" : ["/bin/foundation"],
            "uid" : 7,
            "gid" : 7,
            "once" : 0,
            "importance" : 1,
            "caps" : [10, 11, 12, 13]
        }, {
            "name" : "shell",
            "path" : ["/bin/shell"],
            "uid" : 2,
            "gid" : 2,
            "once" : 0,
            "importance" : 0,
            "caps" : [4294967295]
        }, {
            "name" : "appspawn",
            "path" : ["/bin/appspawn"],
            "uid" : 1,
            "gid" : 1,
            "once" : 0,
            "importance" : 0,
            "caps" : [2, 6, 7, 8, 11, 23]
        }, {
            "name" : "apphilogcat",
            "path" : ["/bin/apphilogcat", "-L", "auto"],
            "uid" : 4,
            "gid" : 4,
            "once" : 1,
            "importance" : 0,
            "caps" : []
        }, {
            "name" : "wpa_supplicant",
            "path" : ["/bin/wpa_supplicant","-i","wlan0","-d","-c","/etc/wpa_supplicant.conf"],
            "uid" : 8,
            "gid" : 8,
            "once" : 0,
            "importance" : 0,
            "caps" : [0,1]
        },{
            "name" : "wms_server",
            "path" : ["/bin/wms_server"],
            "uid" : 0,
            "gid" : 0,
            "once" : 1,
            "importance" : 0,
            "caps" : []
        }, {
            "name" : "bundle_daemon",
            "path" : ["/bin/bundle_daemon"],
            "uid" : 8,
            "gid" : 8,
            "once" : 0,
            "importance" : 0,
            "caps" : [0, 1]
        }
    ]
}

在OpenHarmony 中init进程通过读取/etc/init.cfg，根据配置执行指定命令，或启动指定进程。

添加的代码有：

【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区
【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区

Init配置文件基于JSON格式，用来配置系统启动时必要的命令和服务。Init在系统启动时解析配置文件，并根据配置文件执行对应的命令，启动相应的服务。

【FFH】Bearpi-HM-Micro开机自启动程序-开源基础软件社区

看似简单，实则配置文件的格式要求十分十分严谨，多一个逗号不行，少一个逗号也不行！！！
都是在不断的试错、尝试中总结的经验。
其实在OpenHarmony设备开发的官方文档​​​引导启动配置文件​​​中也有说到：
cfg文件是严格按照JSON格式编写的，当添加服务或命令未生效时，可以优先排查添加内容的格式是否正确/(ㄒoㄒ)/~~。

​​​想了解更多关于开源的内容，请访问：​​

​​51CTO 开源基础软件社区​​

​​https://ost.51cto.com​​。


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