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如何开发自用的2803x的串口烧写程序



项目用到2803x,需要开发自用的ISP程序,方便客户以后自己升级使用,为什么不用推荐的第三方的C2Prog,因为想把生成的hex进行一些加密,然后在PC端解密后下发,至少不会把直接能使用的hex流出去。

请问各位fae,如何实现,需要哪些资料呢