升级教程：
1. 前往官网下载并解压好需要升级的固件。
2. 将电脑USB连接QX13主USB接口并关闭EQ。
3. 解压固件包并选择对应苹果电脑芯片版本的固件文件。
4. 打开xmos升级工具。
5. 点击'Search',当提示target dev found,点击 'start。
6.直到升级进度条跑完即完成升级。
注：如果中途升级失败，拔插USB按照上述操作再升级一遍即可

Firmware update instruciton:
Video instruction: https://youtu.be/90f__SG_ez0
1.Download and unzip the required firmware from the official website;
2.Connect the computer's USB to the main USB port of the QX13, and disable EQ;
3.Unzip the firmware package and select the firmware package corresponding to the chip;
4.Open the XMOS upgrade tool;
5.Click 'Search'.After detecting the QX13, click'Start'.
6.Wait until the progress bar completes to finish the upgrade.

Note:
If the upgrade fails or disconnects midway, please reopen the upgrade tool and try again.