写一个stm32f103rct6做MCUA3982做步进电机驱动芯片使用PWM控制步进电机速度程序的h文件和c文件定时器TIM3CH3PWM引脚PB0DIR引脚PB10ENABLE引脚P11

以下是使用STM32F103RCT6和A3982驱动步进电机的PWM程序的h文件和c文件：

PWM.h

#ifndef PWM_H
#define PWM_H

#include "stm32f10x.h"

void PWM_Init(void);
void PWM_SetDutyCycle(uint16_t dutyCycle);

#endif

PWM.c

#include "PWM.h"

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

    // Enable GPIOB clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    // Enable TIM3 clock
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    // Configure PB0 as TIM3_CH3 output
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    // Configure TIM3
    TIM_TimeBaseStructure.TIM_Period = 999; // 1 kHz frequency
    TIM_TimeBaseStructure.TIM_Prescaler = 71; // 72 MHz / 72 = 1 MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    // Configure TIM3_CH3 as PWM output
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0; // 0% duty cycle
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC3Init(TIM3, &TIM_OCInitStructure);

    // Enable TIM3_CH3 output
    TIM_CCPreloadControl(TIM3, ENABLE);
    TIM_Cmd(TIM3, ENABLE);
}

void PWM_SetDutyCycle(uint16_t dutyCycle)
{
    TIM_OCInitTypeDef TIM_OCInitStructure;

    // Set duty cycle
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = (dutyCycle * 1000) / 100; // duty cycle as percentage
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC3Init(TIM3, &TIM_OCInitStructure);

    // Enable TIM3_CH3 output
    TIM_CCPreloadControl(TIM3, ENABLE);
    TIM_Cmd(TIM3, ENABLE);
}

在此基础上，可以添加A3982的驱动程序来控制步进电机。