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关于串口例程UART调试问题i



经过大家的帮忙,终于能够把程序下载到C6678了,但是从网上下载UART例程,测试发现有个问题,初始化如下:

我把这个函数修改了,没用的删除了

如果中断服务程序,如下,串口接收发送都正常,而且串口中断也正常:

但是如果串口中断服务程序修改如下,串口中断没了:

必须把电路板断电重新启动,然后下载图3的中断服务程序,才能串口收发正常。请问是什么回事。谢谢!