pid控制直流电机代码基于stm32
时间: 2023-09-03 13:06:26 浏览: 146
基于stm32直流电机PID
您好!以下是一个基于STM32的PID控制直流电机的代码示例:
首先,需要包含相关的头文件和定义一些变量:
```c
#include "stm32f4xx.h"
#define MOTOR_PWM_PIN GPIO_Pin_0
#define MOTOR_GPIO_PORT GPIOA
#define KP 1.0
#define KI 0.5
#define KD 0.2
float setpoint = 0.0; // 目标设定值
float feedback = 0.0; // 反馈值
float error = 0.0; // 误差值
float prevError = 0.0;// 上一次的误差值
float integral = 0.0; // 积分项
float derivative = 0.0; // 微分项
float output = 0.0; // 控制输出值
```
接下来,需要初始化相关的GPIO和定时器:
```c
void GPIO_Configuration(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = MOTOR_PWM_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(MOTOR_GPIO_PORT, &GPIO_InitStructure);
GPIO_PinAFConfig(MOTOR_GPIO_PORT, GPIO_PinSource0, GPIO_AF_TIM2);
}
void TIM_Configuration(void) {
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 999; // 根据实际情况调整
TIM_TimeBaseStructure.TIM_Prescaler = 83; // 根据实际情况调整
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_Cmd(TIM2, ENABLE);
}
```
接下来,实现PID控制算法的函数:
```c
void PID_Controller(void) {
error = setpoint - feedback;
integral += error;
derivative = error - prevError;
output = KP * error + KI * integral + KD * derivative;
prevError = error;
}
```
最后,在主函数中不断更新反馈值,并根据PID算法调整输出值:
```c
int main(void) {
SystemInit();
GPIO_Configuration();
TIM_Configuration();
while(1) {
// 更新反馈值,这里需要根据实际情况获取电机的转速或位置
feedback = GetMotorFeedback();
// 调用PID控制算法
PID_Controller();
// 更新PWM的占空比
TIM_SetCompare1(TIM2, (uint16_t) output);
}
}
```
请注意,以上代码仅为示例,具体的实现需要根据您的实际情况进行调整。另外,需要根据您的硬件连接情况来配置相关的GPIO和定时器。
希望对您有所帮助!如有任何问题,请随时提问。
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