等待TA.1=1 发送成功标记位,必须实时的等待吗?
在此等待期间,MCU是否可以执行其他程序。
比如过一段时间,来检查此位是否置1,是,发送下个数据;不是,MCU执行其他程序,过段时间再来检查此位。
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