写一个使用库函数方法stm32f103rct6做MCU步进电机型号为A3982通过pwm控制步进电机速度的程序定时器TIM2CH1step引脚PB0dir引脚PB10ENABLE引脚PB11有main的c文件pwm的c文件和h文件motor的c文件和h文件通电后直接让电机转动PB11输出高电平

main.c文件：

#include "stm32f10x.h"
#include "motor.h"
#include "pwm.h"

int main(void)
{
    PWM_Init();
    Motor_Init();
    Motor_Enable();
    while (1)
    {
        Motor_Step();
    }
}

pwm.h文件：

#ifndef __PWM_H
#define __PWM_H

void PWM_Init(void);

#endif

pwm.c文件：

#include "stm32f10x.h"
#include "pwm.h"

void PWM_Init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseStructure.TIM_Period = 999; // 1 kHz
    TIM_TimeBaseStructure.TIM_Prescaler = 71; // 1 MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    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_Pulse = 500; // 50% duty cycle
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM2, &TIM_OCInitStructure);

    TIM_Cmd(TIM2, ENABLE);
}

motor.h文件：

#ifndef __MOTOR_H
#define __MOTOR_H

void Motor_Init(void);
void Motor_Enable(void);
void Motor_Disable(void);
void Motor_Step(void);

#endif

motor.c文件：

#include "stm32f10x.h"
#include "motor.h"

#define MOTOR_STEP GPIO_Pin_0
#define MOTOR_DIR GPIO_Pin_10
#define MOTOR_ENABLE GPIO_Pin_11

void Motor_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = MOTOR_STEP | MOTOR_DIR | MOTOR_ENABLE;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_SetBits(GPIOB, MOTOR_DIR);
    GPIO_ResetBits(GPIOB, MOTOR_STEP);
    GPIO_SetBits(GPIOB, MOTOR_ENABLE);
}

void Motor_Enable(void)
{
    GPIO_ResetBits(GPIOB, MOTOR_ENABLE);
}

void Motor_Disable(void)
{
    GPIO_SetBits(GPIOB, MOTOR_ENABLE);
}

void Motor_Step(void)
{
    GPIO_SetBits(GPIOB, MOTOR_STEP);
    GPIO_ResetBits(GPIOB, MOTOR_STEP);
}