STM32F407ZGT6——实验9-4 通用定时器脉冲计数实验

一、配置路线

二、问题及反思

配置的时候误以为需要先把【输入捕获配置】了再去配置【从模式】，后面验证了这样配置没办法产生预期的效果。

代码如下：void gtim_timx_cnt_chy_init(uint16_t psc, uint16_t arr)

void gtim_timx_cnt_chy_init(uint16_t psc, uint16_t arr)

{

    /* TIM初始化 */

    gtim_timx_cnt_chy_handle.Instance = TIM5;

    gtim_timx_cnt_chy_handle.Init.Prescaler = psc;

    gtim_timx_cnt_chy_handle.Init.Period = arr;

    gtim_timx_cnt_chy_handle.Init.CounterMode = TIM_COUNTERMODE_UP;

    HAL_TIM_IC_Init(>im_timx_cnt_chy_handle);

    

    /* GPIO初始化，开启时钟 */

    __HAL_RCC_GPIOA_CLK_ENABLE();

    __HAL_RCC_TIM5_CLK_ENABLE();

    

    GPIO_InitTypeDef gpio_init_struct;

    gpio_init_struct.Pin = GPIO_PIN_0;                       /* LED0引脚 */

    gpio_init_struct.Mode = GPIO_MODE_AF_PP;                /* 推挽输出 */

    gpio_init_struct.Pull = GPIO_PULLUP;                    /* 上拉 */

    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;          /* 高速 */

    gpio_init_struct.Alternate = GPIO_AF2_TIM5;

    HAL_GPIO_Init(GPIOA, &gpio_init_struct);               /* 初始化LED0引脚 */

    

//    /* 输入捕获配置 */

//    TIM_IC_InitTypeDef timx_chy_ic_handle = {0};

//    timx_chy_ic_handle.ICPolarity = TIM_ICPOLARITY_RISING;

//    timx_chy_ic_handle.ICSelection = TIM_ICSELECTION_DIRECTTI;

//    timx_chy_ic_handle.ICPrescaler = TIM_ICPSC_DIV1;

//    timx_chy_ic_handle.ICFilter = 0;

//    HAL_TIM_IC_ConfigChannel(>im_timx_cnt_chy_handle,&timx_chy_ic_handle, TIM_CHANNEL_1);

//    HAL_TIM_IC_Start(>im_timx_cnt_chy_handle, TIM_CHANNEL_1);                 /* 开启捕获功能 */

    

    /* 从模式初始化 */

    TIM_SlaveConfigTypeDef timx_chy_slave_handle = {0};

    timx_chy_slave_handle.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;

    timx_chy_slave_handle.InputTrigger = TIM_TS_TI1FP1;

    timx_chy_slave_handle.TriggerPolarity = TIM_TRIGGERPOLARITY_RISING;

    timx_chy_slave_handle.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;

    timx_chy_slave_handle.TriggerFilter = 0;

    HAL_TIM_SlaveConfigSynchro(>im_timx_cnt_chy_handle,&timx_chy_slave_handle);

    

    /* 使能定时器更新中断，配置定时器中断优先级,开启捕获功能 */

    HAL_NVIC_SetPriority(TIM5_IRQn, 1, 3);

    HAL_NVIC_EnableIRQ(TIM5_IRQn);

    __HAL_TIM_ENABLE_IT(>im_timx_cnt_chy_handle, TIM_IT_UPDATE);            /* 使能更新中断 */

    HAL_TIM_IC_Start(>im_timx_cnt_chy_handle, TIM_CHANNEL_1);               /* 开启捕获功能 */

}

//    /* 输入捕获配置 */

//    TIM_IC_InitTypeDef timx_chy_ic_handle = {0};

//    timx_chy_ic_handle.ICPolarity = TIM_ICPOLARITY_RISING;

//    timx_chy_ic_handle.ICSelection = TIM_ICSELECTION_DIRECTTI;

//    timx_chy_ic_handle.ICPrescaler = TIM_ICPSC_DIV1;

//    timx_chy_ic_handle.ICFilter = 0;

//    HAL_TIM_IC_ConfigChannel(>im_timx_cnt_chy_handle,&timx_chy_ic_handle, TIM_CHANNEL_1);

//    HAL_TIM_IC_Start(>im_timx_cnt_chy_handle, TIM_CHANNEL_1);                 /* 开启捕获功能 */

配置方面的代码以及寄存器的理解已经有一定的程度，但是在main.c编写代码逻辑时还是不够清晰，经常犯一些错误。