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在中断服务函数里不停在断点处



我用ccs5.5,自己设计的6678电路板,在串口,gpio中断服务函数中设置断点,程序进去中断服务函数后,不停留在断点处,而是继续运行,直到退出中断服务函数,但是肯定有中断,因为我在中断服务函数里添加了计数器,计数器是增加的。请问是什么原因?