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进一步试验发现在定时器函数中屏蔽UCOS的OSTimeTick就可以正常响应UART0中断，这是为什么呢？否则UART0的中断处理函数根本无法被调用到。是中断重入有问题？ void Timer0_Exception(void) { uint32 regBak; regBak = VICIntEnable; VICIntEnClr = ( 1<<0x04)|(1<<0x06); VICVectAddr = 0x00; // 中断处理结束 T0IR = 0x01; /* OSTimeTick();*/ VICIntEnable = regBak; } [em06][em06]

OSTimeTick();函数做了哪些动作?

应该是比较普通的操作,屏蔽掉其中关、开中断的操作代码也是一样的现象 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ { ptcb = OSTCBList; while (ptcb->OSTCBPrio != OS_IDLE_PRIO) { OS_ENTER_CRITICAL(); if (ptcb->OSTCBDly != 0) { if (--ptcb->OSTCBDly == 0) { if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == OS_STAT_RDY) { OSRdyGrp |= ptcb->OSTCBBitY; OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX; } else { ptcb->OSTCBDly = 1; } } } ptcb = ptcb->OSTCBNext; OS_EXIT_CRITICAL(); } } +++++++++++++++++++++++++++++++++++++++++++++++++++++++ OS_ENTER_CRITICAL(): __asm { MRS R0, SPSR ORR R0, R0, #NoInt MSR SPSR_c, R0 } OsEnterSum++; +++++++++++++++++++++++++++++++++++++++++++++++++++ OS_EXIT_CRITICAL() __asm { MRS R0, SPSR BIC R0, R0, #NoInt MSR SPSR_c, R0 } [em48]

类似问题 正在努力解决中

我也遇到相似的，RTC中断可用，而TIMER1中断就不行

本人一菜鸟,弱弱的说一下,别见笑啊.是不是把中断初始化的代码部分改一下啊 VICIntEnable |=1<<6; VICIntEnable |=1<<4;