F030定时器3的单触发模式，配置有问题，求解决！

gregrgr · 发表于 2018-11-1 20:01:57

这是配置部分的代码

void TIM3_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* TIM3_CH1 pin (PA.06) configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* TIM3_CH2 pin (PA.07) configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_OType=  GPIO_OType_PP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_Pin_6,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_Pin_7,GPIO_AF_1);

}

void TIM3_Configuration(void)
{

TIM_TimeBaseInitTypeDef       TIM_TimeBaseStructure;
TIM_ICInitTypeDef          TIM_ICInitStructure;
TIM_OCInitTypeDef          TIM_OCInitStructure;

/* TIM4 and GPIOB clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

/* Compute the prescaler value */
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 47;
TIM_TimeBaseStructure.TIM_Prescaler = 1000;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_SetAutoreload(TIM3,1000);

TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM_ARRPreloadConfig(TIM3,ENABLE);
// TIM3 PWM2 Mode configuration: Channel2
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM3,ENABLE);
/* TIM3 configuration in Input Capture Mode */

TIM_ICStructInit(&TIM_ICInitStructure);//恢复缺省值

TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;                //选择输入端IC2映射到TI1上
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;    //上升沿捕获
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;          //配置输入分频，不分频
TIM_ICInitStructure.TIM_ICFilter = 0;                            //配置输入滤波，不滤波

TIM_ICInit(TIM3, &TIM_ICInitStructure);

// 单脉冲模式选择
TIM_SelectOnePulseMode(TIM3, TIM_OPMode_Single);          //生成单一的脉冲：计数器在下一个更新事件停止

// 选择 TIM 输入触发源
TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);             //TIM 输入1

//TIM_SelectOutputTrigger()
// 选择 TIM 从模式
TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Trigger);          //计数器在触发的上升沿开始

TIM_Cmd(TIM3,ENABLE);

}