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TM4C129芯片的UART FIFO

Other Parts Discussed in Thread: TM4C129ENCPDT

发送使用FIFO这种模式,即发送字符到UART移位寄存器上的工作是由芯片的外设进行的,类似与电脑CPU与外设的关系,应该是不占用CPU资源的,但实际上不是,想清楚下原理,还望您能回复。