234 lines
7.1 KiB
C
234 lines
7.1 KiB
C
/**
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******************************************************************************
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* @file bsp_basic_tim.c
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* @author STMicroelectronics
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* @version V1.0
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* @date 2015-xx-xx
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* @brief 基本定时器定时范例
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H750 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :https://fire-stm32.taobao.com
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*
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******************************************************************************
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*/
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#include "./tim/bsp_advance_tim.h"
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#include "./led/bsp_led.h"
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TIM_HandleTypeDef TIM_PWMOUTNPUT_Handle;
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TIM_HandleTypeDef TIM_PWMINPUT_Handle;
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TIM_OC_InitTypeDef sConfig;
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__IO uint16_t ChannelPulse = 5000;
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__IO uint16_t IC2Value = 0;
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__IO uint16_t IC1Value = 0;
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__IO float DutyCycle = 0;
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__IO float Frequency = 0;
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/**
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* @brief 高级定时器 TIMx,x=[1,8]通道引脚初始化
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* @param 无
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* @retval 无
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*/
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static void TIMx_GPIO_Configuration(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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//使能高级定时器的引脚时钟
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ADVANCE_TIM_CHx_CLK();
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//使能通用定时器的引脚时钟
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GENERAL_TIM_CHx_CLK();
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH ;
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GPIO_InitStruct.Pin = GENERAL_TIM_CHx_PIN;
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GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
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HAL_GPIO_Init(GENERAL_TIM_CHx_PORT, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = ADVANCE_TIM_CHx_PIN;
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GPIO_InitStruct.Alternate = GPIO_AF3_TIM8;
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HAL_GPIO_Init(ADVANCE_TIM_CHx_PORT, &GPIO_InitStruct);
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}
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/*
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* 注意：TIM_TimeBaseInitTypeDef结构体里面有5个成员，TIM6和TIM7的寄存器里面只有
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* TIM_Prescaler和TIM_Period，所以使用TIM6和TIM7的时候只需初始化这两个成员即可，
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* 另外三个成员是通用定时器和高级定时器才有.
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*-----------------------------------------------------------------------------
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* TIM_Prescaler 都有
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* TIM_CounterMode TIMx,x[6,7]没有，其他都有（基本定时器）
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* TIM_Period 都有
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* TIM_ClockDivision TIMx,x[6,7]没有，其他都有(基本定时器)
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* TIM_RepetitionCounter TIMx,x[1,8]才有(高级定时器)
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*-----------------------------------------------------------------------------
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*/
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/**
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* @brief 通用定时器TIMx初始化函数
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* @param 无
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* @retval 无
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*/
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static void TIMx_Output_Configuration(void)
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{
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//使能TIMx的时钟
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GENERAL_TIM_CLK_ENABLE();
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//TIMx的外设寄存器基地址
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TIM_PWMOUTNPUT_Handle.Instance = GENERAL_TIM;
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//计数模式为向上计数，递增
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TIM_PWMOUTNPUT_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
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/* 累计 TIM_Period个后产生一个更新或者中断*/
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//当定时器从0计数到9999，即为10000次，为一个定时周期
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TIM_PWMOUTNPUT_Handle.Init.Period = 10000 - 1;
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//时钟不分频，即一个TIM_CLK时钟计1次
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TIM_PWMOUTNPUT_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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//定时器时钟源TIMxCLK = 2 * PCLK1
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// PCLK1 = HCLK / 4
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// => TIMxCLK=HCLK/2=SystemCoreClock/2=240MHz
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// 设定定时器频率为=TIMxCLK/(TIM_Prescaler+1)=1000000Hz
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TIM_PWMOUTNPUT_Handle.Init.Prescaler = 240 - 1;
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// 初始化定时器TIM
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HAL_TIM_PWM_Init(&TIM_PWMOUTNPUT_Handle);
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/* 配置TIM为互补输出模式 */
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//互补输出，PWM1模式
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//计数值CNT小于比较值CCR（sConfig.Pulse），通道x为有效电平
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//计数值CNT大于比较值CCR（sConfig.Pulse），通道x为无效电平
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sConfig.OCMode = TIM_OCMODE_PWM1;
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//CHx的有效电平为高电平
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sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
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//CHx在空闲状态下为低电平
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sConfig.OCIdleState = TIM_OCNIDLESTATE_RESET;
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//CHxN在空闲状态下为高电平(必须与CHx相反)
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sConfig.OCNIdleState = TIM_OCIDLESTATE_SET;
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//CHxN的有效电平为高电平
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sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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//比较器CCR的值
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sConfig.Pulse = ChannelPulse;
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//初始化输出比较通道
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HAL_TIM_OC_ConfigChannel(&TIM_PWMOUTNPUT_Handle, &sConfig, GENERAL_TIM_CH);
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//主动输出CHx使能
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HAL_TIM_OC_Start(&TIM_PWMOUTNPUT_Handle, GENERAL_TIM_CH);
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}
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/**
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* @brief 通用定时器TIMx初始化函数
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* @param 无
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* @retval 无
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*/
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static void TIMx_Input_Configuration(void)
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{
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TIM_IC_InitTypeDef TIM_IC_Config;
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TIM_SlaveConfigTypeDef TIM_SlaveConfig;
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//使能TIMx的时钟
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ADVANCE_TIM_CLK_ENABLE();
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//TIMx的外设寄存器基地址
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TIM_PWMINPUT_Handle.Instance = ADVANCE_TIM;
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//计数模式为向上计数，递增
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TIM_PWMINPUT_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
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/* 累计 TIM_Period个后产生一个更新或者中断*/
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//当定时器从0计数到9999，即为10000次，为一个定时周期
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TIM_PWMINPUT_Handle.Init.Period = 10000;
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//时钟不分频，即一个TIM_CLK时钟计1次
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TIM_PWMINPUT_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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//定时器时钟源TIMxCLK = 2 * PCLK1
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// PCLK1 = HCLK / 4
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// => TIMxCLK=HCLK/2=SystemCoreClock/2=240MHz
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// 设定定时器频率为=TIMxCLK/(TIM_Prescaler+1)=100Hz
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TIM_PWMINPUT_Handle.Init.Prescaler = 240 - 1;
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// 初始化定时器TIM
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HAL_TIM_PWM_Init(&TIM_PWMINPUT_Handle);
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/* IC1捕获：上升沿触发TI1FP1 */
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TIM_IC_Config.ICPolarity = TIM_ICPOLARITY_RISING;
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TIM_IC_Config.ICFilter = 0;
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TIM_IC_Config.ICPrescaler = TIM_ICPSC_DIV1;
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TIM_IC_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
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HAL_TIM_IC_ConfigChannel(&TIM_PWMINPUT_Handle, &TIM_IC_Config, ADVANCE_TIM_IC_CH1);
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/* IC2捕获：下降沿触发TI1FP2 */
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TIM_IC_Config.ICPolarity = TIM_ICPOLARITY_FALLING;
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TIM_IC_Config.ICFilter = 0;
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TIM_IC_Config.ICPrescaler = TIM_ICPSC_DIV1;
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TIM_IC_Config.ICSelection = TIM_ICSELECTION_INDIRECTTI;
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HAL_TIM_IC_ConfigChannel(&TIM_PWMINPUT_Handle, &TIM_IC_Config, ADVANCE_TIM_IC_CH2);
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/* 选择从模式: 复位模式 */
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TIM_SlaveConfig.SlaveMode = TIM_SLAVEMODE_RESET;
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/* 选择定时器输入触发: TI1FP1 */
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TIM_SlaveConfig.InputTrigger = TIM_TS_TI1FP1;
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HAL_TIM_SlaveConfigSynchronization(&TIM_PWMINPUT_Handle,&TIM_SlaveConfig);
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HAL_TIM_IC_Start_IT(&TIM_PWMINPUT_Handle,ADVANCE_TIM_IC_CH1);
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HAL_TIM_IC_Start_IT(&TIM_PWMINPUT_Handle,ADVANCE_TIM_IC_CH2);
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}
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/**
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* @brief TIM中断优先级配置函数
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* @param 无
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* @retval 无
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*/
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static void ADVANCE_TIM_NVIC_Config(void)
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{
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HAL_NVIC_SetPriority(ADVANCE_TIM_IRQ, 0, 0);
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HAL_NVIC_EnableIRQ(ADVANCE_TIM_IRQ);
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}
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/**
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* @brief 初始化基本定时器定时，1ms产生一次中断
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* @param 无
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* @retval 无
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*/
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void TIM_Advance_Init(void)
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{
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//TIM通道引脚初始化
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TIMx_GPIO_Configuration();
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//高级定时器中断配置
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ADVANCE_TIM_NVIC_Config();
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//通用TIM外设初始化
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TIMx_Output_Configuration();
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//高级TIM外设初始化
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TIMx_Input_Configuration();
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}
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/**
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* @brief 输入捕获完成中断回调函数
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* @param TIM_Handle : ADC句柄
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* @retval 无
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*/
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void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
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{
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if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
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{
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/* 获取输入捕获值 */
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IC1Value = HAL_TIM_ReadCapturedValue(&TIM_PWMINPUT_Handle,TIM_CHANNEL_1);
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IC2Value = HAL_TIM_ReadCapturedValue(&TIM_PWMINPUT_Handle,TIM_CHANNEL_2);
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if (IC1Value != 0)
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{
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/* 占空比计算 */
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DutyCycle = (float)((IC2Value+1) * 100) / (IC1Value+1);
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/* 频率计算 */
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Frequency = 240000000/240/(float)(IC1Value+1);
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}
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else
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{
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DutyCycle = 0;
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Frequency = 0;
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}
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}
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}
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/*********************************************END OF FILE**********************/
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