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基于STM32的直流电机调速系统

功能：
1.通过LCD屏幕显示实时两个电机的占空比
2.通过按键调整电机1和2的加减速
3.通过L298N驱动两个直流电机完成调速

一、原理图

二、部分代码

#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "lcd1602.h"
#include "key.h"
#include "dht11.h"
#include "stdio.h"
#include "timer.h"


#define RELAY_ON GPIO_SetBits(GPIOA, GPIO_Pin_8)
#define RELAY_OFF GPIO_ResetBits(GPIOA, GPIO_Pin_8)

extern unsigned int Motor1_Pwm;
extern unsigned int Motor2_Pwm;

unsigned char Flag;
unsigned int key_value;
unsigned char buffer1[15];
unsigned char buffer2[15];


void Relay_Init(void)
{
		GPIO_InitTypeDef GPIO_InitStructure;
		
		RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

		GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8;
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
		GPIO_Init(GPIOA, &GPIO_InitStructure);
		RELAY_OFF;
}





int main(void)
{   
		LCD_init();
		KEY_Init();
		TIM_Config();
		Relay_Init(); 
		NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); 
		while(1)
		{

			sprintf((char*)buffer1, "Motor1_Pwm:%d %%  ", Motor1_Pwm/10);
			LCD_write_string(0, 0, (char*)buffer1);
			
			sprintf((char*)buffer2, "Motor2_Pwm:%d %%  ", Motor2_Pwm/10);
			LCD_write_string(0, 1, (char*)buffer2);
			
			
			key_value = KEY_Scan(0);
			if(key_value == 1)      {if(Motor1_Pwm <= 900) Motor1_Pwm+=100;}
			else if(key_value == 2) {if(Motor1_Pwm >= 100) Motor1_Pwm-=100;}
			else if(key_value == 3) {if(Motor2_Pwm <= 900) Motor2_Pwm+=100;}
			else if(key_value == 4) {if(Motor2_Pwm >= 100) Motor2_Pwm-=100;}
			else if(key_value == 5) 
			{
				if(Flag == 0)
				{
					Flag = 1;
					RELAY_ON;
				}
				else if(Flag == 1)
				{
					Flag = 0;
					RELAY_OFF;
				}
			}
		}
}

三、视频演示

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