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看一下sprui33f_TMS320F28004x Real-Time Microcontrollers Technical Reference Manual (Rev. F)的26.13 Message Interface Register Sets,P2433。
通过手册说明,IFx寄存器和mailbox的0x4~0x14是一一对应的关系,但对比手册IFx寄存器和Message RAM发现并不一一对应。我通过IF1寄存器配置mailbox,再配置IF2寄存器读取刚配置mailbox的内容,发现IF2寄存器内容和IF1写入的一致,但实际数据传输是从IF1 -> mailbox -> IF2,IF1 ->mailbox的传输过程看起来是有丢失数据的(已在debug下验证),mailbox ->IF2的传输过程,却把刚才丢失的数据还原过来了,所以想问下IF1 ->mailbox传输丢失的数据是不是有存在其它地方?