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TMS320C5517: 串口读数据只进入一次中断服务函数

Part Number: TMS320C5517


使用CSL的串口中断例程,把程序改为只要接收部分,接收中断只能进入一次,之后再也进不去,查看中断标志位和中断使能位都是对的,求助原因