【STM32】STM32学习笔记-编码器接口测速(20)

00. 目录

01. 预留

02. 编码器测速接线图

03. 编码器测速程序示例

Encoder.h

#ifndef __ENCODER_H
#define __ENCODER_H

void Encoder_Init(void);
int16_t Encoder_Get(void);

#endif

Encoder.c

#include "stm32f10x.h"                  // Device header

void Encoder_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
		
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
	TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1;		//ARR
	TIM_TimeBaseInitStructure.TIM_Prescaler = 1 - 1;		//PSC
	TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure);
	
	TIM_ICInitTypeDef TIM_ICInitStructure;
	TIM_ICStructInit(&TIM_ICInitStructure);
	TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
	TIM_ICInitStructure.TIM_ICFilter = 0xF;
	TIM_ICInit(TIM3, &TIM_ICInitStructure);
	TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
	TIM_ICInitStructure.TIM_ICFilter = 0xF;
	TIM_ICInit(TIM3, &TIM_ICInitStructure);
	
	TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
	
	TIM_Cmd(TIM3, ENABLE);
}

int16_t Encoder_Get(void)
{
	int16_t Temp;
	Temp = TIM_GetCounter(TIM3);
	TIM_SetCounter(TIM3, 0);
	return Temp;
}

main.c

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
#include "Encoder.h"

int16_t Speed;

int main(void)
{
	OLED_Init();
	Timer_Init();
	Encoder_Init();
	
	OLED_ShowString(1, 1, "Speed:");
	
	while (1)
	{
		OLED_ShowSignedNum(1, 7, Speed, 5);
	}
}

void TIM2_IRQHandler(void)
{
	if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)
	{
		Speed = Encoder_Get();
		TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
	}
}

04. 程序下载

14-编码器接口测速.rar

05. 附录

参考: 【STM32】江科大STM32学习笔记汇总