STM32__ 05 - PWM controlled DC motor

One ,TB6612 Motor drive module

 

  DC motor belongs to high-power device ,GPIO Cannot drive directly , The motor drive module is required to cooperate , To drive the DC motor .

TB6612 Can drive 2 One DC motor . from IN1,IN2 Control the rotation direction of the motor , from PWM Control the rotation speed of the motor .

Two , Code section

The core code is still PWM part , DC motor initialization is only multi initialization 2 Two GPIO mouth , Used to generate voltage difference , Drive motor , And through 2 individual GPIO Change the rotation direction of the motor .

Source of wiring diagram ： Jiang Keda

 PWM.c

#include "stm32f10x.h"                  // Device header

void PWM_Init(void)
{
	// Turn on TIM2 Connected bus APBB1
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

	
	GPIO_InitTypeDef GPIOA_InitStructure;
	GPIOA_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
	GPIOA_InitStructure.GPIO_Pin=GPIO_Pin_2;
	GPIOA_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIOA_InitStructure);
	
	// Select the internal clock 
	TIM_InternalClockConfig(TIM2);
	
	// Time base unit initialization 
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;
	TIM_TimeBaseStruct.TIM_ClockDivision=TIM_CKD_DIV1;
	TIM_TimeBaseStruct.TIM_CounterMode=TIM_CounterMode_Up;
	TIM_TimeBaseStruct.TIM_Period=100-1;   //ARR
	TIM_TimeBaseStruct.TIM_Prescaler=36-1;  //PSC
	TIM_TimeBaseStruct.TIM_RepetitionCounter=0;
	TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStruct);
	
	TIM_OCInitTypeDef TIM_OCInitStructture;
	TIM_OCStructInit(&TIM_OCInitStructture);
	TIM_OCInitStructture.TIM_OCMode=TIM_OCMode_PWM1;
	TIM_OCInitStructture.TIM_OCPolarity=TIM_OCPolarity_High ;
	TIM_OCInitStructture.TIM_OutputState=TIM_OutputState_Enable;
	TIM_OCInitStructture.TIM_Pulse=90;    //CCR
	TIM_OC3Init(TIM2,&TIM_OCInitStructture);
	TIM_Cmd(TIM2,ENABLE);
}
void PWM_SetCompare3(uint16_t Compare)
{
	TIM_SetCompare3(TIM2,Compare);
}

Motor.c

#include "stm32f10x.h"                  // Device header
#include "PWM.h"

void Motor_Init(void)
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

	GPIO_InitTypeDef GPIOA_InitStructure;
	GPIOA_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
	GPIOA_InitStructure.GPIO_Pin=GPIO_Pin_4 | GPIO_Pin_5;
	GPIOA_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIOA_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_SetBits(GPIOA,GPIO_Pin_5);
		GPIO_ResetBits(GPIOA,GPIO_Pin_4);
		PWM_SetCompare3(-Speed);
	}
}

main.c

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.h"
#include "Buzzer.h"
#include "OLED.h "
#include "Motor.h"

uint8_t KeyNum;
int8_t Speed;
int main()
{
	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);
	}
}
}