int akp_update_firmware(update_file_t *file,long size)
{
    int i = 0;
    int ret = -1;
    T_SYSUPDATE_DATA upcfg;
    
    // parse file header: "anyka update"
    if(strcmp(file->magic,"anyka update") != 0) {\
        ak_print_error("file header error!\n");
        return -1;
    } 

    // check header md5
 

    ak_print_normal("file data len=%d\n",file->data_len);
    char check_sum[UPDATE_MD5_CHECK_LEN];
    void *check_addr = &file->version[0];
    int check_len = file->data_len+((unsigned int)&file->data[0]-(unsigned int)&file->version[0]);
    MDMemory(check_addr, check_sum,check_len);
    
 
//ak_print_normal("check_len=%d\n",check_len);
    //LOG_DATA_DETAIL("sum", check_sum, UPDATE_MD5_CHECK_LEN);
    if(0 != memcmp(&file->md5_check,check_sum,sizeof(check_sum))) {
        ak_print_error("file data check sum error!\n");
        return -1;
    }
    ak_print_normal("check sum ok\n");
    
    
 
// print version and date
    char str_temp[64];
    #if 0
    int version_main = file->version_main;
    int version_middle = file->version_middle;
    int version_minimum = file->version_minimum;
    memset(str_temp,0,sizeof(str_temp));
    sprintf(str_temp,"%d.%d.%d",version_main,version_middle,version_minimum);
    #endif
    ak_print_notice("update verion %s\n",file->version);
    ak_date_to_string(&file->date, str_temp);
    ak_print_notice("release date: %s\n",str_temp);

    // check file num
    unsigned int file_num = file->file_num;
    if(file_num > UPDATE_FILE_NUM_MAX) {
        ak_print_error("file num too many!\n");
        return -1;
    }

    ret = ak_get_update_cfg(&upcfg);
    if(ret) {
        ak_print_error_ex("ak_get_update_cfg err!\n");
        return -1;
    }
    
    ak_print_notice("\nwrite flash,pl wait and keep power on\n"); 

    upcfg.flg = 1;
    ret = ak_set_update_cfg(&upcfg);
    if(ret) {
        ak_print_error_ex("ak_set_update_cfg err!\n");
        return -1;
    }
    
    char *paddr = NULL;
    unsigned int mcu_len = 0,len = 0;
    update_sub_file_info_t *sub_file_info = NULL;
    char mcu_up_flg = 0;
    char *mcu_buf = NULL;
    for(i = 0; i < file_num; i++) {
        sub_file_info = &file->psub_file_info[i];
        paddr = &file->data[sub_file_info->addr];
        len = sub_file_info->len;
        ak_print_normal("sub file name %s",sub_file_info->name);
        if(strcmp(sub_file_info->name,"MCU") == 0){
            mcu_up_flg = 1;
            mcu_buf = paddr;
            mcu_len = len;
            ret = ak_update(paddr,len,sub_file_info->name);
            if(ret) {
                break;
            }
        } else {            //if(strcmp(sub_file_info->name,"KERNEL") == 0)
            ret = ak_update(paddr,len,sub_file_info->name);
            if(ret) {
                break;
            }
        }
    }

    if(ret == 0)
    {
        upcfg.flg = 0;
        ret = ak_set_update_cfg(&upcfg);
        if(ret) {
            ak_print_error_ex("ak_set_update_cfg err!\n");
            return -1;
        }
    }
    
    if(mcu_up_flg)
    {
        akp_sense_close();
        mcu_update(mcu_buf,mcu_len);//mcu will reset ak
    }
    return ret;
}