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C 固件更新示例代码-Firmware Update

# 固件升级示例-FirmwareUpgrade

功能描述:本示例演示如何用固件文件给设备升级。

> 本示例基于C Low Level API进行演示,示例编译语言为C++,OrbbecSDK使用C语言API

 

main函数接口通过命令参数获取固件文件

// check_firmware_file_path()函数用于检查文件是否存在,实际代码中最好检查后缀是否为bin或者img, 以及固件文件是否与目标设备相匹配
const char *check_firmware_file_path(int argc, char **argv) {
    if(argc < 2) {
        printf("Please input firmware path.\n");
        return "";
    }

    const char *filePath = *(argv + 1);
    FILE       *file     = fopen(filePath, "r");
    if(!file) {
        printf("Open Firmware file failed. filePath: %s\n", filePath);
        return "";
    }

    fclose(file);

    return filePath;
}

int main(int argc, char **argv) {
    const char *firmware_file_path = check_firmware_file_path(argc, argv);
    if(!firmware_file_path || 0 == strlen(firmware_file_path)) {
        printf("command: \n$ ./frameware_upgrade[.exe] firmwareFile.bin\n");
        return 0;
    }

    // 接下来的业务代码

    return 0;
}

 

创建ob_context并通过ob_context获取设备,本示例假设运行firmware_upgrade[.exe]之前,上位机(Windows、Ubuntu、Arm平台)已经插入设备。device_changed_callback用于固件升级后监听device重启后获取被升级设备的业务处理

// 构建ob_context对象
ob_error   *error = NULL;
ob_context *ctx   = ob_create_context(&error);
check_error(error);

// 设置设备变化监听器,device_changed_callback是管理device声明周期的关键函数,开发者必须关注该回调
ob_set_device_changed_callback(ctx, device_changed_callback, &callback_user_data_, &error);
check_error(error);

// 查询当前已经接入的设备
ob_device_list *dev_list = ob_query_device_list(ctx, &error);
check_error(error);

// 从ob_device_list中获取当前接入设备的数量
int dev_count = ob_device_list_device_count(dev_list, &error);
check_error(error);
if(dev_count == 0) {
    // 固件升级示例假设设备已经接入到上位机(Windows、Ubuntu、androids平台)
    printf("Device not found!\n");
    return -1;
}

// 获取第一个设备,index=0
ob_device *dev = ob_device_list_get_device(dev_list, 0, &error);
check_error(error);

// 打印设备信息
dump_device_info(dev);

 

获取设备当前的固件版本信息

// 打印设备名称,SN,VID,PID以及固件版本
void dump_device_info(ob_device *device) {
    ob_error *error = NULL;

    // 获取ob_device_info对象,通过ob_device_info可以获取目标设备的基本信息
    ob_device_info *dev_info = ob_device_get_device_info(device, &error);
    check_error(error);

    // 设备名称
    const char *name = ob_device_info_name(dev_info, &error);
    check_error(error);
    printf("Device name: %s\n", name);

    // 设备VID,PID,UID
    int pid = ob_device_info_pid(dev_info, &error);
    check_error(error);
    int vid = ob_device_info_vid(dev_info, &error);
    check_error(error);
    const char *uid = ob_device_info_uid(dev_info, &error);
    check_error(error);
    printf("Device pid: %d vid: %d uid: %s\n", pid, vid, uid);

    // 设备当前的固件版本号
    const char *fw_ver = ob_device_info_firmware_version(dev_info, &error);
    check_error(error);
    printf("Firmware version: %s\n", fw_ver);

    // 设备SN
    const char *sn = ob_device_info_serial_number(dev_info, &error);
    check_error(error);
    printf("Serial number: %s\n", sn);

    // 释放资源,否则会造成内存泄漏
    ob_delete_device_info(dev_info, &error);
    check_error(error);
}

 

给目标设备升级固件

a. 实现C API的固件升级回调接口;

b. 调用固件升级接口进行升级;

// 实现C API的固件升级回调接口;
void device_upgrade_callback(ob_upgrade_state state, const char *message, uint8_t percent, void *user_data) {
    if(state == STAT_START) {
        printf("Upgrade Firmware start\n");
    }
    else if(state == STAT_FILE_TRANSFER) {
        printf("Upgrade Firmware file transfer, percent: %u\n", (uint32_t)percent);
    }
    else if(state == STAT_IN_PROGRESS) {
        printf("Upgrade Firmware in progress, percent: %u\n", (uint32_t)percent);
    }
    else if(state == STAT_DONE) {
        // 固件升级成功
        printf("Upgrade Firmware done, percent: %u\n", (uint32_t)percent);
        is_upgrade_success_ = true;
    }
    else if(state == STAT_VERIFY_IMAGE) {
        printf("Upgrade Firmware verify image\n");
    }
    else {
        // 固件升级失败
        printf("Upgrade Firmware failed. state: %d, errMsg: %s, percent: %u \n", (int)state, message ? message : "", (uint32_t)percent);
    }
}

// 对目标设备进行固件升级
bool upgrade_firmware(ob_device *device, const char *firmwarePath) {
    const char *index     = strstr(firmwarePath, ".img");
    bool        isImgFile = (bool)index;
    index                 = strstr(firmwarePath, ".bin");
    bool isBinFile        = (bool)index;
    if(!(isImgFile || isBinFile)) {
        // 固件升级文件一般为bin或者img,实际业务中最好通过文件名称、文件MD5等信息做防呆
        printf("Upgrade Fimware failed. invalid firmware file: %s\n", firmwarePath);
        return false;
    }

    // 调用固件升级接口进行升级;
    is_upgrade_success_ = false;
    ob_error *error     = NULL;
    ob_device_upgrade(device, firmwarePath, device_upgrade_callback, false, &callback_user_data_, &error);
    check_error(error);
    return is_upgrade_success_;
}

 

固件升级成功后,需要重启设备。重启设备有两种方式,一种是拔插设备(或者操作系统重启),另一种是调用OrbbecSDK的reboot接口。等设备上线后,通过本示例的dump_device_info()函数可以查询当前设备固件版本信息

 

以下示例演示通过固件reboot接口重启设备

// 重启设备
printf("Reboot device\n");
is_device_removed_       = false;
is_wait_reboot_complete_ = true;
ob_device_reboot(dev, &error);
check_error(error);

// 释放资源,防止内存泄漏
ob_delete_device(dev, &error);
check_error(error);

 

ob_device_changed_callback可以监听设备重启时下线、上线的事件,详情可以看热拔插示例

// 监听设备变化
void device_changed_callback(ob_device_list *removed, ob_device_list *added, void *user_data) {
    ob_error *error = NULL;

    // 通过added处理上线的设备

    // 通过removed处理下线的设备

    // 释放资源,避免内存泄漏
    ob_delete_device_list(removed, &error);
    check_error(error);

    // 释放资源,避免内存泄漏
    ob_delete_device_list(added, &error);
    check_error(error);
}

 

预期输出:

image.png

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