一.参数

编码电机其实就是一个带有编码器的电机，我的这个电机是一个带霍尔传感器的电机，型号是JGB37-520，然后我的电机减速比是30（一定要记住，买的时候也要看清电机减速比是多少，涉及到转速的计算），额定电压12V，然后就是编码器的参数了，见下图

电机驱动模块我用的TB6612的四路的板子，就是下面这款，很好用，就是稍微有点贵。

二.常用测速方法

主要分为M法、T法和M/T法，详情见这篇文章STM32 CubeMax 编码器电机测速原理与实现

三.CubeMX配置

首先是配置PWM输出定时器，我这里使用的是TIM8

然后再配置编码器输入定时器TIM2，TIM3\TIM4\TIM5按照相同的参数配置

这里开启了两个通道计数，就是倍频技术的4倍频

编码器模式下的定时器其实是个计数器，在编码器的脉冲到来时，Counter会相应地加和减，正转时加，反转时减，溢出后到达另一个极端值，比如说向上计数到达20001时会变成0

再设置每隔10ms读取定时器的值的定时器TIM6

最后注意中断优先级TIM6要小于编码器计数的定时器。

四.代码

encoder.c

#include "encoder.h"Motor motor1;
Motor motor2;
Motor motor3;
Motor motor4;
int t1,t2,t3,t4,j1,j2,j3,j4;void Motor_Init(void)
{HAL_TIM_Encoder_Start(&ENCODER_TIM1, TIM_CHANNEL_ALL);      //开启编码器定时器HAL_TIM_Encoder_Start(&ENCODER_TIM2, TIM_CHANNEL_ALL); HAL_TIM_Encoder_Start(&ENCODER_TIM3, TIM_CHANNEL_ALL); HAL_TIM_Encoder_Start(&ENCODER_TIM4, TIM_CHANNEL_ALL); __HAL_TIM_ENABLE_IT(&ENCODER_TIM1,TIM_IT_UPDATE);           //开启编码器定时器更新中断,防溢出处理__HAL_TIM_ENABLE_IT(&ENCODER_TIM2,TIM_IT_UPDATE); __HAL_TIM_ENABLE_IT(&ENCODER_TIM3,TIM_IT_UPDATE); __HAL_TIM_ENABLE_IT(&ENCODER_TIM4,TIM_IT_UPDATE); HAL_TIM_Base_Start_IT(&GAP_TIM);                       //开启10ms定时器中断__HAL_TIM_SET_COUNTER(&ENCODER_TIM1, 10000);                //编码器定时器初始值设定为10000__HAL_TIM_SET_COUNTER(&ENCODER_TIM2, 10000);__HAL_TIM_SET_COUNTER(&ENCODER_TIM3, 10000);__HAL_TIM_SET_COUNTER(&ENCODER_TIM4, 10000);motor1.lastCount = 0;                                   //结构体内容初始化motor1.totalCount = 0;motor1.overflowNum = 0;                                  motor1.speed = 0;motor1.direct = 0;motor2.lastCount = 0;                                   //结构体内容初始化motor2.totalCount = 0;motor2.overflowNum = 0;                                  motor2.speed = 0;motor2.direct = 0;motor3.lastCount = 0;                                   //结构体内容初始化motor3.totalCount = 0;motor3.overflowNum = 0;                                  motor3.speed = 0;motor3.direct = 0;motor4.lastCount = 0;                                   //结构体内容初始化motor4.totalCount = 0;motor4.overflowNum = 0;                                  motor4.speed = 0;motor4.direct = 0;
}
//M法测速度
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)//定时器回调函数，用于计算速度
{if(htim->Instance==ENCODER_TIM1.Instance)//编码器输入定时器溢出中断                    {      if(COUNTERNUM1 < 10000) motor1.overflowNum++;       //如果是向上溢出else if(COUNTERNUM1 >= 10000) motor1.overflowNum--; //如果是向下溢出__HAL_TIM_SetCounter(&ENCODER_TIM1, 10000);             //重新设定初始值if(COUNTERNUM2 < 10000) motor2.overflowNum++;       //如果是向上溢出else if(COUNTERNUM2 >= 10000) motor2.overflowNum--; //如果是向下溢出__HAL_TIM_SetCounter(&ENCODER_TIM2, 10000);             //重新设定初始值if(COUNTERNUM3 < 10000) motor3.overflowNum++;       //如果是向上溢出else if(COUNTERNUM3 >= 10000) motor3.overflowNum--; //如果是向下溢出__HAL_TIM_SetCounter(&ENCODER_TIM3, 10000);             //重新设定初始值if(COUNTERNUM4 < 10000) motor4.overflowNum++;       //如果是向上溢出else if(COUNTERNUM4 >= 10000) motor4.overflowNum--; //如果是向下溢出__HAL_TIM_SetCounter(&ENCODER_TIM4, 10000);             //重新设定初始值}else if(htim->Instance==GAP_TIM.Instance)//间隔定时器中断，是时候计算速度了{motor1.direct = __HAL_TIM_IS_TIM_COUNTING_DOWN(&ENCODER_TIM1);//如果向上计数（正转），返回值为0，否则返回值为1motor1.totalCount = COUNTERNUM1 + motor1.overflowNum * RELOADVALUE1;//一个周期内的总计数值等于目前计数值加上溢出的计数值motor1.speed = (float)(motor1.totalCount - motor1.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10;//算得每秒多少转if(motor1.direct==0){t1=motor1.speed/1;j1=(motor1.speed-t1)*10000;}else{t1=-motor1.speed/1;j1=-(motor1.speed+t1)*10000;}//motor1.speed = (float)(motor1.totalCount - motor1.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10 * LINE_SPEED_C//算得车轮线速度每秒多少毫米motor1.lastCount = motor1.totalCount; //记录这一次的计数值  motor2.direct = __HAL_TIM_IS_TIM_COUNTING_DOWN(&ENCODER_TIM2);//如果向上计数（正转），返回值为0，否则返回值为1motor2.totalCount = COUNTERNUM2 + motor1.overflowNum * RELOADVALUE2;//一个周期内的总计数值等于目前计数值加上溢出的计数值motor2.speed = (float)(motor2.totalCount - motor2.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10;//算得每秒多少转if(motor2.direct==0){t2=motor2.speed/1;j2=(motor2.speed-t2)*10000;}else{t2=-motor2.speed/1;j2=-(motor2.speed+t2)*10000;}//motor1.speed = (float)(motor1.totalCount - motor1.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10 * LINE_SPEED_C//算得车轮线速度每秒多少毫米motor2.lastCount = motor2.totalCount; //记录这一次的计数值motor3.direct = __HAL_TIM_IS_TIM_COUNTING_DOWN(&ENCODER_TIM3);//如果向上计数（正转），返回值为0，否则返回值为1motor3.totalCount = COUNTERNUM3 + motor3.overflowNum * RELOADVALUE3;//一个周期内的总计数值等于目前计数值加上溢出的计数值motor3.speed = (float)(motor3.totalCount - motor3.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10;//算得每秒多少转if(motor3.direct==0){t3=motor3.speed/1;j3=(motor3.speed-t3)*10000;}else{t3=-motor3.speed/1;j3=-(motor3.speed+t3)*10000;}//motor1.speed = (float)(motor1.totalCount - motor1.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10 * LINE_SPEED_C//算得车轮线速度每秒多少毫米motor3.lastCount = motor3.totalCount; //记录这一次的计数值motor4.direct = __HAL_TIM_IS_TIM_COUNTING_DOWN(&ENCODER_TIM4);//如果向上计数（正转），返回值为0，否则返回值为1motor4.totalCount = COUNTERNUM4 + motor4.overflowNum * RELOADVALUE4;//一个周期内的总计数值等于目前计数值加上溢出的计数值motor4.speed = (float)(motor4.totalCount - motor4.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10;//算得每秒多少转if(motor4.direct==0){t4=motor4.speed/1;j4=(motor4.speed-t4)*10000;}else{t4=-motor4.speed/1;j4=-(motor4.speed+t4)*10000;}//motor1.speed = (float)(motor1.totalCount - motor1.lastCount) / (4 * MOTOR_SPEED_RERATIO * PULSE_PRE_ROUND) * 10 * LINE_SPEED_C//算得车轮线速度每秒多少毫米motor4.lastCount = motor4.totalCount; //记录这一次的计数值}
}

encoder.h

#ifndef _ENCODER_H_
#define _ENCODER_H_#include "stm32f1xx.h"
#include "tim.h"//定时器号
#define ENCODER_TIM1 htim2
#define ENCODER_TIM2 htim3
#define ENCODER_TIM3 htim4
#define ENCODER_TIM4 htim5#define GAP_TIM     htim6#define MOTOR_SPEED_RERATIO 30u    //电机减速比
#define PULSE_PRE_ROUND 11 //一圈多少个脉冲
#define RADIUS_OF_TYRE 40 //轮胎半径，单位毫米
#define LINE_SPEED_C RADIUS_OF_TYRE * 2 * 3.14#define RELOADVALUE1 __HAL_TIM_GetAutoreload(&ENCODER_TIM1)    //获取自动装载值,本例中为20000
#define COUNTERNUM1 __HAL_TIM_GetCounter(&ENCODER_TIM1)        //获取编码器定时器中的计数值#define RELOADVALUE2 __HAL_TIM_GetAutoreload(&ENCODER_TIM2)
#define COUNTERNUM2 __HAL_TIM_GetCounter(&ENCODER_TIM2) #define RELOADVALUE3 __HAL_TIM_GetAutoreload(&ENCODER_TIM3)
#define COUNTERNUM3 __HAL_TIM_GetCounter(&ENCODER_TIM3) #define RELOADVALUE4 __HAL_TIM_GetAutoreload(&ENCODER_TIM4)
#define COUNTERNUM4 __HAL_TIM_GetCounter(&ENCODER_TIM4) typedef struct _Motor
{int32_t lastCount;   //上一次计数值int32_t totalCount;  //总计数值int16_t overflowNum; //溢出次数float speed;         //电机转速uint8_t direct;      //旋转方向
}Motor;
extern int t1,t2,t3,t4,j1,j2,j3,j4;
void Motor_Init(void);
void HAL_TIM_PeriodElapsedCallback1(TIM_HandleTypeDef *htim);#endif

main.c

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** Copyright (c) 2023 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "i2c.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "bluetooth.h"
#include "Control.h"
#include "oled.h"
#include "encoder.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_TIM8_Init();MX_USART1_UART_Init();MX_I2C2_Init();MX_TIM2_Init();MX_TIM6_Init();MX_TIM3_Init();MX_TIM4_Init();MX_TIM5_Init();/* USER CODE BEGIN 2 */HAL_UART_Receive_IT(&huart1,(uint8_t *)&USART1_NewData,1);/* USER CODE END 2 */OLED_Init();OLED_CLS();OLED_ShowChar(14,1,'.',15);OLED_ShowChar(14,2,'.',15);OLED_ShowChar(14,3,'.',15);OLED_ShowChar(14,4,'.',15);OLED_ShowStr(50,5,"By Whelve",2);OLED_ShowStr(60,1,"r/s",1);OLED_ShowStr(60,2,"r/s",1);OLED_ShowStr(60,3,"r/s",1);OLED_ShowStr(60,4,"r/s",1);Motor_Init();/* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE */Control();OLED_ShowNum(0,1,t1,2,15);OLED_ShowNum(18,1,j1,5,15);OLED_ShowNum(0,2,t2,2,15);OLED_ShowNum(18,2,j2,5,15);OLED_ShowNum(0,3,t3,2,15);OLED_ShowNum(18,3,j3,5,15);OLED_ShowNum(0,4,t4,2,15);OLED_ShowNum(18,4,j4,5,15);/* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief  This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef  USE_FULL_ASSERT
/*** @brief  Reports the name of the source file and the source line number*         where the assert_param error has occurred.* @param  file: pointer to the source file name* @param  line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

代码部分参考自STM32 CubeMax 编码器电机测速原理与实现

最后效果不错

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stm32编码器电机测速（hal库）

一.参数

二.常用测速方法

三.CubeMX配置

四.代码

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