stm32f103vet6的pwm驱动电机
时间: 2023-11-01 13:07:18 浏览: 34
要使用STM32F103VET6控制电机,可以使用定时器的PWM输出来驱动电机。
以下是一个简单的示例代码,使用TIM2的通道2输出PWM信号来驱动电机:
```c
#include "stm32f10x.h"
#define MOTOR_PIN GPIO_Pin_1
#define MOTOR_PORT GPIOA
#define MOTOR_TIM TIM2
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* Enable peripheral clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* Configure GPIO pin as PWM output */
GPIO_InitStructure.GPIO_Pin = MOTOR_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(MOTOR_PORT, &GPIO_InitStructure);
/* Configure timer */
TIM_TimeBaseStructure.TIM_Period = 255; // PWM frequency = 72MHz / (TIM_Prescaler * (TIM_Period + 1))
TIM_TimeBaseStructure.TIM_Prescaler = 71; // PWM frequency = 1kHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(MOTOR_TIM, &TIM_TimeBaseStructure);
/* Configure timer channel as PWM output */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; // PWM duty cycle = TIM_Pulse / TIM_Period
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(MOTOR_TIM, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(MOTOR_TIM, TIM_OCPreload_Enable);
/* Start timer */
TIM_Cmd(MOTOR_TIM, ENABLE);
/* Main loop */
while (1) {
/* Set PWM duty cycle */
TIM_SetCompare2(MOTOR_TIM, 127); // 50% duty cycle
}
}
```
在这个示例中,我们使用GPIOA的Pin1作为PWM输出引脚,连接到电机的控制电路。我们使用TIM2作为PWM定时器,并配置为1kHz的PWM频率。我们还将TIM2的通道2配置为PWM输出,使用TIM_SetCompare2函数设置PWM占空比。
请注意,这只是一个简单的示例,实际电机的控制可能需要更多的代码和电路设计。