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TMS320F28388D: 串口通信问题

Part Number: TMS320F28388D


我用similink的代码生成功能,对控制器做了一个简单的串口通信实验,simulink模型代码如下图。大致意思就是利用SCI中断将收到的数据发送回上位机,但串口助手上返回的结果并不正确。在CCS中调试发现receive变量不管上位机串口输入什么值,结果都是255。想不通问题出在哪。