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ROM_IntPrioritySet()的用法

ROM_IntPrioritySet(INT_UART1,0);
ROM_IntPrioritySet(INT_GPIOF,1);
ROM_IntPrioritySet(INT_UART5,2);
ROM_IntPrioritySet(INT_TIMER0A,3);这样设置中断优先级有什么不妥吗关键我还有一个SysTickIntRegister(SysTickIntHandler);

望指教,谢谢