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虽然我不知道问题产生的过程,但我找到了问题产生的根源。在标准SCI模式下,如果连续写TXBUF,而不查标志位,会有意想不到的事情发生,比如上面的事情。
不知道咱算不算程序员,编程开发,学新东西真累啊。。。真苦啊