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如果屏蔽按键初始化程序烧录一次之后，再打开按键程序烧录编译烧录，程序又可以正常跑，不会死在中断里面。
使用的芯片是MSP430FR2100
每次烧录之前先把开发环境关闭，然后重新打开再烧录试试。如果这样还出这样的问题，可能就是硬件问题了。
