l298n电机驱动模块stm32的代码
时间: 2024-06-11 10:01:58 浏览: 16
L298N电机驱动模块可以用来控制直流电机或步进电机。在STM32中,可以通过使用GPIO口输出PWM信号来控制电机的速度,同时使用其他GPIO口控制电机的方向。下面是一个简单的L298N电机驱动模块的STM32代码示例,以控制一个直流电机为例:
```
#include "stm32f10x.h"
#define L298N_IN1_PIN GPIO_Pin_0
#define L298N_IN1_PORT GPIOA
#define L298N_IN2_PIN GPIO_Pin_1
#define L298N_IN2_PORT GPIOA
#define L298N_PWM_PIN GPIO_Pin_8
#define L298N_PWM_PORT GPIOB
void L298N_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
// IN1 and IN2 as output
GPIO_InitStructure.GPIO_Pin = L298N_IN1_PIN | L298N_IN2_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(L298N_IN1_PORT, &GPIO_InitStructure);
// PWM pin as alternate function output
GPIO_InitStructure.GPIO_Pin = L298N_PWM_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(L298N_PWM_PORT, &GPIO_InitStructure);
// Timer4 init for PWM signal generation
TIM_TimeBaseStructure.TIM_Period = 3999; // 20kHz PWM frequency (SystemCoreClock / 4000)
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
// PWM output compare config
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; // initial duty cycle of 0%
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC4Init(TIM4, &TIM_OCInitStructure);
TIM_Cmd(TIM4, ENABLE);
}
void L298N_SetSpeed(int speed)
{
if(speed > 0)
{
// set direction forward
GPIO_SetBits(L298N_IN1_PORT, L298N_IN1_PIN);
GPIO_ResetBits(L298N_IN2_PORT, L298N_IN2_PIN);
TIM_SetCompare4(TIM4, speed);
}
else if(speed < 0)
{
// set direction reverse
GPIO_ResetBits(L298N_IN1_PORT, L298N_IN1_PIN);
GPIO_SetBits(L298N_IN2_PORT, L298N_IN2_PIN);
TIM_SetCompare4(TIM4, -speed);
}
else
{
// set speed to 0 and stop motor
TIM_SetCompare4(TIM4, 0);
GPIO_ResetBits(L298N_IN1_PORT, L298N_IN1_PIN);
GPIO_ResetBits(L298N_IN2_PORT, L298N_IN2_PIN);
}
}
```
以上代码初始化了GPIO口和定时器,用于输出PWM信号,然后提供了一个函数L298N_SetSpeed(),用于设置电机的速度和方向。调用L298N_Init()函数可以初始化L298N电机驱动模块。
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)