谢谢!
但是这个CKD就好像没设置。
我在工程里搜CKD
那是不是按照默认的值呀？
void Tim1_PWM_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable TIM1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; // 模式增
TIM_TimeBaseStructure.TIM_Period = 5999; // 从装比较最大 18k = 72000/ 6000= 12k
TIM_TimeBaseStructure.TIM_ClockDivision = 0; // 分频
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; // 控制占空比
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High ; // 上桥臂
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High ; // 下桥臂
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
TIM_OC1Init(TIM1, &TIM_OCInitStructure); // 比较单元1 2 3
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
// The DeadTime=8(32+DTG[4:0])Tdts DTG= C4
TIM_BDTRInitStructure.TIM_DeadTime = 0x6A; // 带死区 1.8us左右
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
TIM_ClearITPendingBit(TIM1, TIM_IT_Break); //清中断标志位
TIM_ITConfig(TIM1,TIM_IT_Break ,ENABLE); //使能中断
TIM_ClearFlag(TIM1, TIM_FLAG_Update);
TIM_ClearITPendingBit(TIM1, TIM_IT_Update); //清中断标志位
TIM_ITConfig(TIM1,TIM_IT_Update ,ENABLE); //打开中断
TIM_Cmd(TIM1, ENABLE);//计数开始
TIM_CtrlPWMOutputs(TIM1, ENABLE);
/* Configure one bit for preemption priority */
//选择优先级分组
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
//配置TIM1的刹车中断使能
NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//指定抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//指定抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//配置TIM1的更新中断使能
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//指定抢占优先级1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//指定抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
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