STM32 TIM1重复计数器+单脉冲模式 产生精确个数脉冲
STM32 TIM1重复计数器+单脉冲模式 产生精确个数脉冲
程序如下：
void TIM1_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1
|RCC_APB2Periph_GPIOA
|RCC_APB2Periph_GPIOB
|RCC_APB2Periph_AFIO, ENABLE );
//--TIM1更新中断配置-------------------------------------
//NVIC_InitStructure.NVIC_IRQChannel= TIM1_UP_IRQn;
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 1;
//NVIC_InitStructure.NVIC_IRQChannelSubPriority= 0;
//NVIC_InitStructure.NVIC_IRQChannelCmd= ENABLE;
//NVIC_Init(&NVIC_InitStructure);
TIM_DeInit(TIM1);
//--TIM1基本配置-----------------------------------------
TIM_TimeBaseStructure.TIM_Period = 11; //设置周期 ，频率=72MHz/11=6.5MHz
TIM_TimeBaseStructure.TIM_Prescaler = 0; //预分频(时钟分频) 不分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0x00; //设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode= TIM_CounterMode_Up; //设置向上计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter= 0x0A; //重复计数器计数值
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure); //初始化函数
TIM_SelectOnePulseMode(TIM1, TIM_OPMode_Single); //设置单脉冲模式，在发生下一次更新事件时计数器停止
TIM_ARRPreloadConfig(TIM1,DISABLE); //失能在ARR上的预装载寄存器,没有缓冲
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Disable); //失能在CCR1上的预装载寄存器
//--TIM1 PWM输出OC1配置----------------------------------------------
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //使能输出比较状态
TIM_OCInitStructure.TIM_OutputNState= TIM_OutputNState_Enable; //使能互补输出状态
TIM_OCInitStructure.TIM_Pulse = 3; //设置待装入捕获比较寄存器的脉冲值 占空时间
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性低
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //互补 输出极性高
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; //MOE=0 设置 TIM1输出比较空闲状态
TIM_OCInitStructure.TIM_OCNIdleState= TIM_OCIdleState_Set; //MOE=0 重置 TIM1输出比较空闲状态
TIM_OC1Init(TIM1,&TIM_OCInitStructure); //函数初始化
//--TIM1 PWM输出BDTR配置----------------------------------------------
TIM_BDTRInitStructure.TIM_OSSRState= TIM_OSSRState_Enable; //OSSR
TIM_BDTRInitStructure.TIM_OSSIState= TIM_OSSIState_Enable; //OSSI
TIM_BDTRInitStructure.TIM_LOCKLevel= TIM_LOCKLevel_1; //锁定级别1
TIM_BDTRInitStructure.TIM_DeadTime = 0; //死区时间0
TIM_BDTRInitStructure.TIM_Break= TIM_Break_Disable; //空闲模式不允许
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; //空闲电平极性高
TIM_BDTRInitStructure.TIM_AutomaticOutput= TIM_AutomaticOutput_Enable; //自动输出使能
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);
//TIM_ITConfig(TIM1,TIM_IT_Update , ENABLE); //使能更新中断
TIM_ITConfig(TIM1,TIM_IT_Update , DISABLE); //失能中断
TIM_UpdateRequestConfig(TIM1,TIM_UpdateSource_Global); //设置更新请求源 0
TIM_GenerateEvent(TIM1,TIM_EventSource_Update); //设置由软件产生一个TIM1更新事件
__nop();
TIM_ClearFlag(TIM1,TIM_IT_Update); //清除待处理标志位
TIM_UpdateRequestConfig(TIM1,TIM_UpdateSource_Regular); //设置更新请求源 1,只有溢出才能触发DMA
//
TIM_CtrlPWMOutputs(TIM1, DISABLE); //主输出失能
TIM_Cmd(TIM1, DISABLE); //使能TIM外设
}
重复计数器RCR计数值设置为0x0A。
手册上说当重复计数器RCR值为0且同时出现计数器溢出时，才会有更新请求。
现在，在第一次溢出时产生更新，但是此时RCR不为0? 为什么?
单脉冲模式到底怎么用?
求教。
TIM_CtrlPWMOutputs(TIM1, ENABLE); //主输出失能
TIM_Cmd(TIM1, ENABLE); //使能TIM外设
请问小编这个代码是可以用的吗
重复计数器的使用可否说明一下
学习中，感觉没怎么明白小编的意思
非常感谢分享，谢谢
问题解决了吗?