咨询stm32f103c8 使用TIM1

winterflower 提问时间：2014-10-10 16:58 /

咨询stm32f103c8 使用TIM1 的 T1_1N和 T1_2N输入捕捉功能,CCR1 CCR2读数为0，是否有现成程序给个参考，我的设置如下：

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

TIM_DeInit(TIM1);
TIM_TimeBaseStructure.TIM_Period = PERCENT100; //周期0～FFFF
TIM_TimeBaseStructure.TIM_Prescaler = PWM_Prescaler; //时钟分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);//基本初始化

TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;//选择通道
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge; // TIM_ICPolarity_Rising;//上升沿
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;//通道方向选择
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;//每次检测到捕获输入就触发一次捕获
TIM_ICInitStructure.TIM_ICFilter = 0x0;

TIM_ICInit(TIM1, &TIM_ICInitStructure);

TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;//选择通道
TIM_ICInit(TIM1, &TIM_ICInitStructure);
// TIM_PWMIConfig(TIM1, &TIM_ICInitStructure);

/* Select the TIM2 Input Trigger: TI2FP2 */
// TIM_SelectInputTrigger(TIM1, TIM_TS_TI2FP2);

/* Select the slave Mode: Reset Mode */
// TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);

/* Enable the Master/Slave Mode */
// TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);

TIM_Cmd(TIM1, ENABLE);
TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE);