stm32 定时器无cc事件产生

自由的风

我用定时器1的PWM模式来输出波形，主要是想利用其CC事件来触发DMA传输，都配置好了，测得PWM波形正确，但是相应的DMA就是没启动，难道是没有CC事件产生吗？我查看了DMA设置都没问题。另外，TIM1采用的是单次转换，然后在TIM1 更新中断中重新开启TIM1 。部分代码如下：

定时器设置：

TIM_TimeBaseStructure.TIM_Period = T1;

    TIM_TimeBaseStructure.TIM_Prescaler = 71;

    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

    TIM_TimeBaseStructure.TIM_ClockDivision = 0;

 

    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    TIM_SelectOnePulseMode(TIM1,TIM_OPMode_Single);

    

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

    //TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;

    TIM_OCInitStructure.TIM_Pulse = T2;

    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

 

    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

 

    TIM_DMACmd(TIM1, TIM_DMA_CC1, ENABLE);

 

 

DMA设置：

         DMA_InitTypeDef DMA_InitStructure;

 

    DMA_DeInit(DMA1_Channel2);

 

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADDR;

    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&MADDR;

    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

    DMA_InitStructure.DMA_BufferSize = Num;

    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;

    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;

    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

    DMA_InitStructure.DMA_Priority = DMA_Priority_High;

    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

 

    DMA_Init(DMA1_Channel2, &DMA_InitStructure);

自由的风

没人知道么？求原子哥来解答一下

自由的风

没人啊

正点原子

这个定时器触发dma，我也还没搞过，帮顶了。

自由的风

回复【4楼】正点原子:
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多谢原子哥回帖