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想通过单片机的串口给6748升级程序，请问下这个串口协议是什么样的？单片机的串口需要按照什么样的格式发送程序到6748?
请看下面的bootloader文档。3.2 Host Port Interface (HPI) Boothttps://www.ti.com/lit/an/spraat2f/spraat2f.pdf关于主机HPI口的通信，可以参考下面的应用文档。https://www.ti.com/cn/lit/an/zhca430/zhca430.pdf
