GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
//PD13 ch1 A,PD14 ch2 B
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);//
GPIO_PinRemapConfig(GPIO_Remap_TIM4, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);//将GPIO_InitStruct中的参数按缺省值输入
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;// GPIO_Mode_IN_FLOATING GPIO_Mode_IPD
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);//使能TIM4时钟
//NVIC_Config(2);
TIM_DeInit(TIM4);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 2400; //设定计数器重装值 TIMx_ARR = 359*4
TIM_TimeBaseStructure.TIM_Prescaler = 0 ; //TIM3时钟预分频值
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ;//设置时钟分割 T_dts = T_ck_int
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI12, TIM_ICPolarity_BothEdge ,TIM_ICPolarity_BothEdge);//使用编码器模式3，上升都计数
// TIM_ETRClockMode2Config(TIM4, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0);
TIM_ICStructInit(&TIM_ICInitStructure);//将结构体中的内容缺省输入
TIM_ICInitStructure.TIM_ICFilter = 6; //选择输入比较滤波器
TIM_ICInit(TIM4, &TIM_ICInitStructure);//将TIM_ICInitStructure中的指定参数初始化TIM3
TIM4->CNT = 0;//
TIM_Cmd(TIM4, ENABLE); //启动TIM4定时器
|
楼主
标题置顶
标题高亮
