萌新求救，只有2金钱了，帮帮孩子吧

Wangqiwen · 发表于 2020-7-10 09:53:30

想用TIM1生成CH3N周期为216ms且占空比为0.2%,CH2N周期为300us且占空比为50%,而且让CH2N比CH3N滞后75us，有没有大佬帮我看看错哪了
static void TIM1_Mode_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
/*--------------------中断优先级NVIC设置-------------------------*/
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;          //TIM1捕获比较中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //先占优先级1级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;          //从优先级1级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;             //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);                            //初始化NVIC寄存器
TIM_ITConfig(TIM1, TIM_IT_CC2 | TIM_IT_CC3, ENABLE);       //通道2、通道3中断使能
/*--------------------时基结构体初始化-------------------------*/
TIM_TimeBaseStructure.TIM_Period= 10799;                      //ARR+1=24=1M*T, T=24us?
TIM_TimeBaseStructure.TIM_Prescaler= 71;                   //配置1M计数
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;    //配置死区时间
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;             //重复计数器的值，没用到不用管
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);             //初始化TIMx的时间基数单位
/*--------------------输出比较结构体初始化-------------------*/
TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_Toggle;          //配置为Toggle模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;  //输出使能
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//互补输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;    //输出通道电平极性配置
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补输出通道电平极性配置
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;    //输出通道空闲电平极性配置
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set; //互补输出通道空闲电平极性配置

/*--------------------输出比较通道2-------------------------*/
TIM_OCInitStructure.TIM_Pulse = 300;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
/*--------------------输出比较通道3-------------------------*/
  TIM_OCInitStructure.TIM_Pulse = 21600;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
// 使能计数器
TIM_Cmd(TIM1, ENABLE);
// 主输出使能，当使用的是通用定时器时，这句不需要
TIM_CtrlPWMOutputs(TIM1, ENABLE);

}
中断服务函数
void TIM1_CC_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM1, TIM_IT_CC2) != RESET)
  {
  u16 capture = 0;
  TIM_ClearITPendingBit(TIM1, TIM_IT_CC2 );
capture = TIM_GetCapture2(TIM1);
TIM_SetCompare2(TIM1, capture  );
  }
  if (TIM_GetITStatus(TIM1, TIM_IT_CC3) != RESET)
  {
   u16 capture = 0;

   TIM_ClearITPendingBit(TIM1, TIM_IT_CC3);
capture = TIM_GetCapture3(TIM1);
if(state==0)
   {
      TIM_SetCompare3(TIM1, capture + 21600* 0.02 );
      state=1;
   }
   else
   {
   TIM_SetCompare3(TIM1, capture + 21600 * 0.98 );
   state=0;
}
  }
}