天津网站建设制作品牌公司,wordpress根据文章id显示内容,个人网页设计首页,邯郸房产58同城RT-Thread Studio学习#xff08;十六#xff09;定时器计数 一、简介二、新建RT-Thread项目并使用外部时钟三、启用PWM输入捕获功能四、测试 一、简介
本文将基于STM32F407VET芯片介绍如何在RT-Thread Studio开发环境下使用定时器对输入脉冲进行计数。
硬件及开发环境如下… RT-Thread Studio学习十六定时器计数 一、简介二、新建RT-Thread项目并使用外部时钟三、启用PWM输入捕获功能四、测试 一、简介
本文将基于STM32F407VET芯片介绍如何在RT-Thread Studio开发环境下使用定时器对输入脉冲进行计数。
硬件及开发环境如下
OS WIN10STM32F407VET6STM32CubeMX v6.10.0STM32Cube MCU Package for STM32F4 Series v1.28.0RT-Thread Studio v2.2.7RT-Thread Source Code v5.0.2STM32F4 chip support packages v0.2.3
二、新建RT-Thread项目并使用外部时钟
打开RT-Thread Studio软件新建基于芯片的项目并使用外部时钟系统具体参见《RT-Thread Studio学习一使用外部时钟系统》。
三、启用PWM输入捕获功能 打开PWM驱动框架 在RT-Thread Setting 中借助图形化配置工具打开组件中的HWTIMER的驱动框架如下图所示 定义TIM相关的宏 将TIM5配置为PWM输入模式在board.h文件中使能宏定义
#define BSP_USING_TIM
#ifdef BSP_USING_TIM
#define BSP_USING_TIM5
#endif复制TIM初始化函数 双击RT-Thread Studio工程中的cubemx.ioc文件使能TIM5。设置Slave Mode为External Clock Mode 1设置Trigger Source为TI1FP1。具体如下图 不要使能TIM5的全局中断
再重新生成STM32CubeMX代码将.\cubemx\Src\tim.c中的函数HAL_TIM_Base_MspInit和HAL_TIM_MspPostInit复制到board.c的末尾。 再次复制函数HAL_TIM_Base_MspInit到board.c的末尾并将其函数名改成HAL_TIM_PWM_MspInit。
在Application文件夹中添加头文件pwm_input.h代码如下
#ifndef APPLICATIONS_PWM_INPUT_H_
#define APPLICATIONS_PWM_INPUT_H_#include rtthread.h
#include board.hextern uint16_t PWM_RisingCount;
extern uint16_t PWM_FallingCount;
extern float duty;extern TIM_HandleTypeDef htim5;void MX_TIM2_Init(void);
void MX_TIM5_Init(void);
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim);#endif /* APPLICATIONS_PWM_INPUT_H_ */在上文《RT-Thread Studio学习十五PWM测量》的源文件pwm_input.c添加代码
TIM_HandleTypeDef htim5;
/* TIM5 init function */
void MX_TIM5_Init(void)
{/* USER CODE BEGIN TIM5_Init 0 *//* USER CODE END TIM5_Init 0 */TIM_SlaveConfigTypeDef sSlaveConfig {0};TIM_MasterConfigTypeDef sMasterConfig {0};/* USER CODE BEGIN TIM5_Init 1 *//* USER CODE END TIM5_Init 1 */htim5.Instance TIM5;htim5.Init.Prescaler 0;htim5.Init.CounterMode TIM_COUNTERMODE_UP;htim5.Init.Period 4294967295;htim5.Init.ClockDivision TIM_CLOCKDIVISION_DIV1;htim5.Init.AutoReloadPreload TIM_AUTORELOAD_PRELOAD_DISABLE;if (HAL_TIM_Base_Init(htim5) ! HAL_OK){Error_Handler();}sSlaveConfig.SlaveMode TIM_SLAVEMODE_EXTERNAL1;sSlaveConfig.InputTrigger TIM_TS_TI1FP1;sSlaveConfig.TriggerPolarity TIM_TRIGGERPOLARITY_RISING;sSlaveConfig.TriggerFilter 0;if (HAL_TIM_SlaveConfigSynchro(htim5, sSlaveConfig) ! HAL_OK){Error_Handler();}sMasterConfig.MasterOutputTrigger TIM_TRGO_RESET;sMasterConfig.MasterSlaveMode TIM_MASTERSLAVEMODE_DISABLE;if (HAL_TIMEx_MasterConfigSynchronization(htim5, sMasterConfig) ! HAL_OK){Error_Handler();}/* USER CODE BEGIN TIM5_Init 2 */HAL_TIM_Base_Start(htim5);/* USER CODE END TIM5_Init 2 */}修改.\drivers\include\config\tim_config.h文件在tim_config.h中添加代码 #ifdef BSP_USING_TIM5
#ifndef TIM5_CONFIG
#define TIM5_CONFIG \{ \.tim_handle.Instance TIM5, \.tim_irqn TIM5_IRQn, \.name timer5, \}
#endif /* TIM5_CONFIG */
#endif /* BSP_USING_TIM5 */定义.\cubemx\Inc\stm32f4xx_hal_conf.h中的相关宏
#define HAL_TIM_MODULE_ENABLED四、测试
修改main.c的代码为
#include rtthread.h
#include stm32f4xx.h
#include rtdevice.h#define DBG_TAG main
#define DBG_LVL DBG_LOG
#include rtdbg.h#include pwm_input.h// PD12 ------ TIM4_CH1
// PA6 ------ TIM13_CH1
// PA7 ------ TIM14_CH1
// PA1 ------ TIM2_CH2
// PA0-WKUP------ TIM5_CH1#define PWM4_DEV_NAME pwm4 /* PWM设备名称 */
#define PWM13_DEV_NAME pwm13 /* PWM设备名称 */
#define PWM14_DEV_NAME pwm14 /* PWM设备名称 */
#define PWM_DEV_CHANNEL 1 /* PWM通道 */
struct rt_device_pwm *pwm_dev; /* PWM设备句柄 */rt_uint32_t channel[4], period[4], pulse[4];int pwm_init(void)
{for (int i0; i2; i){period[i] 1000000; /* 周期为1ms单位为纳秒ns */pulse[i] 400000; /* PWM脉冲宽度值单位为纳秒ns */}/* 初始化设备PWM4 */pwm_dev (struct rt_device_pwm *)rt_device_find(PWM4_DEV_NAME);if (pwm_dev RT_NULL){rt_kprintf(pwm sample run failed! cant find %s device!\n, PWM4_DEV_NAME);return RT_ERROR;}rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period[0], pulse[0]);rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);/* 初始化设备PWM13 */pwm_dev (struct rt_device_pwm *)rt_device_find(PWM13_DEV_NAME);if (pwm_dev RT_NULL){rt_kprintf(pwm sample run failed! cant find %s device!\n, PWM13_DEV_NAME);return RT_ERROR;}rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period[0], pulse[0]);rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);/* 初始化设备PWM14 */pwm_dev (struct rt_device_pwm *)rt_device_find(PWM14_DEV_NAME);if (pwm_dev RT_NULL){rt_kprintf(pwm sample run failed! cant find %s device!\n, PWM14_DEV_NAME);return RT_ERROR;}rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period[1], pulse[1]);rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);return 0;
}// 第一个参数为命令第二个参数为 PWM 设备名称第 3 个参数为 PWM 通道
// 第 4 个参数为周期单位纳秒第 5 个参数为脉冲宽度单位纳秒
static int pwm_set(int argc, char *argv[])
{if(argc!5){rt_kprintf(Usage: pwm_set device name channel period pulse\n);rt_kprintf(Example: pwm_set pwm13 1 100000 50000\n);return RT_ERROR;}rt_uint32_t period, pulse;char pwmdevname[RT_NAME_MAX];rt_strncpy(pwmdevname, argv[1], RT_NAME_MAX);if((!strcmp(argv[1], pwm4)) || (!strcmp(argv[1], pwm13)) || (!strcmp(argv[1], pwm14))){period atoi(argv[3]); /* PWM period, ns */pulse atoi(argv[4]); /* PWM pulse, ns */}else{rt_kprintf(pwm sample run failed! cant find %s device!\n, pwmdevname);return RT_ERROR;}pwm_dev (struct rt_device_pwm *)rt_device_find(pwmdevname);if (pwm_dev RT_NULL){rt_kprintf(pwm sample run failed! cant find %s device!\n, pwmdevname);return RT_ERROR;}rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);rt_kprintf(pwm_set %s channel:%d period:%dns pulse:%dns\n, pwmdevname, PWM_DEV_CHANNEL, period, pulse);return 0;
}int main(void)
{int count 1;LOG_D(Hello RT-Thread! 2024.1.17);LOG_D(System CLock information);LOG_D(SYSCLK_Frequency %d, HAL_RCC_GetSysClockFreq());LOG_D(HCLK_Frequency %d, HAL_RCC_GetHCLKFreq());LOG_D(PCLK1_Frequency %d, HAL_RCC_GetPCLK1Freq());LOG_D(PCLK2_Frequency %d, HAL_RCC_GetPCLK2Freq());LOG_D(SysTick-LOAD %d, SysTick-LOAD);LOG_D(Current tick %d, rt_tick_get());pwm_init();MX_TIM2_Init();MX_TIM5_Init();while (count){if(count%60 0) LOG_D(Hello RT-Thread! %d, rt_tick_get());if(count%20 0){rt_kprintf(PWM_Duty%d% ,(int)duty);rt_kprintf( FCNT%d RCNT%d \r\n, PWM_FallingCount, PWM_RisingCount);}if(count%2 0){rt_kprintf(ETRCNT%d \r\n, __HAL_TIM_GET_COUNTER(htim5));}rt_thread_mdelay(1000);}return RT_EOK;
}/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(pwm_set, set pwm4 period/pulse. Usage: pwm_set pwm4 1 10000 5000);
在工程中还使能了TIM4、TIM13和TIM14为PWM输出TIM2为PWM输入。操作参见《RT-Thread Studio学习三PWM》 和《RT-Thread Studio学习十五PWM测量》 。
将PWM输入引脚PA1和PWM输出引脚PD12短接将PA1和PA0短接运行结果如下
用逻辑分析仪查看3个PWM的输出引脚PA6、PA7和PD12
