STM32:PWM驱动直流电机

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Motor.h"
#include "Key.h"
uint8_t KeyNum;
int8_t Speed;
int main(void)
{
    OLED_Init();
    Motor_Init();
    Key_Init();
    OLED_ShowString(1, 1, "Speed:");
    while (1)
    {
        KeyNum = Key_GetNum();
        if (KeyNum == 1)
        {
            Speed += 20;
            if (Speed > 100)
            {
                Speed = -100;
            }
        }
        Motor_SetSpeed(Speed);
        OLED_ShowSignedNum(1, 7, Speed, 3);
    }
}

#include "stm32f10x.h"                  // Device header
#include "PWM.h"
void Motor_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    PWM_Init();
}
void Motor_SetSpeed(int8_t Speed)
{
    if (Speed >= 0)
    {
        GPIO_SetBits(GPIOA, GPIO_Pin_4);
        GPIO_ResetBits(GPIOA, GPIO_Pin_5);
        PWM_SetCompare3(Speed);
    }
    else
    {
        GPIO_ResetBits(GPIOA, GPIO_Pin_4);
        GPIO_SetBits(GPIOA, GPIO_Pin_5);
        PWM_SetCompare3(-Speed);
    }
}

#ifndef __MOTOR_H
#define __MOTOR_H
void Motor_Init(void);
void Motor_SetSpeed(int8_t Speed);
#endif