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TMS320F28335的spia如何向外部发送字符串，并把回复的字符串接收，用的是ccs3.3，配置spia为主模式，外部为从模式，根据例程修改，但是用示波器始终不能检测出发送的字符串的波形，请教该如何修改例程才能发送和接收字符串？谢谢！
请路过高手解答，谢谢
