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TMS320F28069 SCI FIFO一直进入发送中断

Other Parts Discussed in Thread: TMS320F28069

TMS320F28069 SCI FIFO一直进入发送中断,采用TI例程Sci_FFDLB_int ,想该写用RS485 ,采用中断接收发送,但是例程中一直无限发送数据,怎样触发中断的呢?为了发送使能(485的EN)在中断函数中加了延时函数,以至于连主函数For循环都进不去了。

想请教一下,1检测哪个寄存器可以知道发送完成? 2想要自己控制发送进入中断。