脉冲信号用于设备控制是比较常见的，但在一些情况下，我们希望精准的控制脉冲的数量以实现对运动的精确控制，实现的方式也有多种多样。定时器是单片机内部最基础且常用的外设，有着非常丰富的功能，如输入功能（测量输入信号的脉冲宽度、频率，PWM 输入等），输出功能（PWM 输出、死区时间可编程的互补输出、 单脉冲模式输出等） ，容易想到使用定时器输出PWM来实现此类操作。

voidTIM1_Monopulse_Init(u16arr,u16psc)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStruct;
TIM_OCInitTypeDefTIM_OCInitStruct;
TIM_ICInitTypeDefTIM_ICInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2ENR_TIM1,ENABLE);
TIM_DeInit(TIM1);
TIM_TimeBaseStructInit(TIM_TimeBaseStruct);
TIM_TimeBaseStruct.TIM_Period=arr;
TIM_TimeBaseStruct.TIM_Prescaler=psc;
TIM_TimeBaseStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStruct.TIM_RepetitionCounter=9;
TIM_TimeBaseStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1,TIM_TimeBaseStruct);

TIM_OCStructInit(TIM_OCInitStruct);
TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse=arr/2;
TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_OCIdleState=TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1,TIM_OCInitStruct);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1,ENABLE);
TIM_SelectOnePulseMode(TIM1,TIM_OPMode_Single);
TIM_SetCounter(TIM1,0);
TIM_CtrlPWMOutputs(TIM1,ENABLE);

TIM_Cmd(TIM1,ENABLE);
}

TIM1_PWM_Init(10000-1,SystemCoreClock/1000000-1);

staticu16data[10]={1000,2000,3000,4000,5000,6000,7000,8000,9000,0};

voidTIM1_DMA_Init(void)
{
DMA_InitTypeDefDMA_InitStruct;
DMA_Channel_TypeDef*channel;
channel=DMA1_Channel2;
RCC_DMA_ClockCmd(DMA1,ENABLE);

DMA_DeInit(channel);
DMA_StructInit(DMA_InitStruct);
//Transferregisteraddress
DMA_InitStruct.DMA_PeripheralBaseAddr=(u32)(TIM1->CCR1);
//Transfermemoryaddress
DMA_InitStruct.DMA_MemoryBaseAddr=(u32)data;
//Transferdirection,frommemorytoregister
DMA_InitStruct.DMA_DIR=DMA_DIR_PeripheralDST;
DMA_InitStruct.DMA_BufferSize=10;
DMA_InitStruct.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
//Transfercompletedmemoryaddressincrement
DMA_InitStruct.DMA_MemoryInc=DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize=DMA_PeripheralDataSize_HalfWord;
DMA_InitStruct.DMA_MemoryDataSize=DMA_MemoryDataSize_HalfWord;
DMA_InitStruct.DMA_Mode=DMA_Mode_Normal;//DMA_Mode_Circular;
DMA_InitStruct.DMA_Priority=DMA_Priority_High;
DMA_InitStruct.DMA_M2M=DMA_M2M_Disable;
DMA_InitStruct.DMA_Auto_reload=DMA_Auto_Reload_Disable;
DMA_Init(channel,DMA_InitStruct);

DMA_ITConfig(channel,DMA_IT_TC,ENABLE);
DMA_Cmd(DMA1_Channel2,ENABLE);
}

voidDMA1_Channel2_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC2)){
DMA_ClearITPendingBit(DMA1_IT_TC2);
TIM_Cmd(TIM1,DISABLE);
}
}

voidTIM1_Master_Init(u16arr,u16psc)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStruct;
TIM_OCInitTypeDefTIM_OCInitStruct;

RCC_APB2PeriphClockCmd(RCC_APB2ENR_TIM1,ENABLE);

TIM_TimeBaseStructInit(TIM_TimeBaseStruct);
TIM_TimeBaseStruct.TIM_Period=arr;
TIM_TimeBaseStruct.TIM_Prescaler=psc;
TIM_TimeBaseStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStruct.TIM_RepetitionCounter=0;
TIM_TimeBaseStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1,TIM_TimeBaseStruct);

TIM_OCStructInit(TIM_OCInitStruct);
TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse=499;
TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OC1Init(TIM1,TIM_OCInitStruct);

TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1,ENABLE);
TIM_SelectMasterSlaveMode(TIM1,TIM_MasterSlaveMode_Enable);
TIM_SelectOutputTrigger(TIM1,TIM_TRIGSource_Update);

TIM_SetCounter(TIM1,0);
TIM_CtrlPWMOutputs(TIM1,ENABLE);
TIM_Cmd(TIM1,ENABLE);
}

voidTIM3_Slave_Init(u16arr,u16psc)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStruct;
RCC_APB1PeriphClockCmd(RCC_APB1ENR_TIM3,ENABLE);

TIM_TimeBaseStructInit(TIM_TimeBaseStruct);
TIM_TimeBaseStruct.TIM_Period=arr;
TIM_TimeBaseStruct.TIM_Prescaler=psc;
TIM_TimeBaseStruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStruct.TIM_RepetitionCounter=0;
TIM_TimeBaseStruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3,TIM_TimeBaseStruct);

TIM_ARRPreloadConfig(TIM3,DISABLE);

TIM_SelectInputTrigger(TIM3,TIM_TS_ITR0);
TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_External1);
TIM_SelectMasterSlaveMode(TIM3,TIM_MasterSlaveMode_Enable);

TIM_ClearFlag(TIM3,TIM_FLAG_Update);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

TIM_SetCounter(TIM3,0);
TIM_Cmd(TIM3,ENABLE);
}

TIM3_Slave_Init(10,0);

voidTIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET){
TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
TIM_CtrlPWMOutputs(TIM1,DISABLE);
TIM_Cmd(TIM1,DISABLE);
TIM_Cmd(TIM3,DISABLE);
TIM_ITConfig(TIM3,TIM_IT_Update,DISABLE);
}
}