关于STM32时钟同步

laojia

要使用STM32产生三路同步脉冲信号，使用定时器同步，TIM3作为TIM2和TIM1的预分频器，下面是我的主要部分程序，软件仿真的时候不能产生波形，

TIM_TimeBaseStructure.TIM_Period =31;

   TIM_TimeBaseStructure.TIM_Prescaler = 1; //1+1=2

   TIM_TimeBaseStructure.TIM_ClockDivision = 0;

   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down ;//向下计数

   TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//TIM3设置

  

   TIM_TimeBaseStructure.TIM_Period = 49;

   TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);//TIM1设置

 

   /* Select the Master Slave Mode *///设置TIM3为主模式

   TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);

   /* Master Mode selection */

   TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_Update);//使用更新事件作为触发输出

  /* Slaves Configuration: PWM1 Mode */

   TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;//PWM2模式

   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

   TIM_OCInitStructure.TIM_Pulse = 40;

   TIM_OC1Init(TIM1, &TIM_OCInitStructure);//TIM1的通道1

   /* Slave Mode selection: TIM1 *///设置TIM1为从模式，并且由TRGI的上升沿触发

   TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Trigger);//The counter starts at a rising edge of the trigger TRGI.

   TIM_SelectInputTrigger(TIM1, TIM_TS_ITR1); //choose Internal Trigger 1

/* TIM enable counter *///使能TIM1，2，3

  TIM_Cmd(TIM3, ENABLE);

     TIM_Cmd(TIM1, ENABLE);

希望有做过定时器同步的朋友指导下，谢谢了

正点原子

还没搞过这个模式，帮顶。

laojia

回复【2楼】正点原子:
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谢谢