stm32控制直流减速电机pwm代码
时间: 2023-10-06 09:12:15 浏览: 99
以下是使用STM32控制直流减速电机的PWM代码:
```c
#include "stm32f10x.h"
#define PWM_PERIOD 1000 // PWM周期,单位为us
#define MOTOR_SPEED 500 // 电机速度,取值范围为0~1000
int main(void)
{
// 使能GPIOB时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
// 使能TIM3时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
// 配置GPIOB10为TIM3_CH3输出
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 配置TIM3
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1; // PWM周期
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 分频系数,时钟为72MHz,分频后为1MHz
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
// 配置TIM3_CH3
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = MOTOR_SPEED; // 占空比,取值范围为0~PWM_PERIOD
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC3Init(TIM3, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
// 启动TIM3
TIM_Cmd(TIM3, ENABLE);
while (1)
{
// 电机控制代码
}
}
```
在此代码中,我们使用了TIM3的PWM功能来控制直流减速电机的速度。首先,我们需要将GPIOB10配置为TIM3_CH3输出,并且使能GPIOB和TIM3的时钟。然后,我们配置TIM3的基本参数,包括PWM周期、分频系数等。接着,我们配置TIM3_CH3的参数,包括占空比、输出极性等。最后,启动TIM3,并在while循环中编写电机控制代码。
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