STM32F103加旋转编码器实现正反转和旋转圈数读取

1万 · 2021-8-4 19:05

一、旋转编码器连接原理图

1万 · 2021-8-4 19:06

二、采集程序
STM32F103

#define key_dir() PBin(1)
#define key_sw() PBin(2)

void  key_init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能PORTA,PORTE时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置成上拉输入
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOE2,3,4

//GPIOB.0    中断线以及中断初始化配置上升沿触发 PB0
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);

    EXTI_InitStructure.EXTI_Line=EXTI_Line0;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //使能按键WK_UP所在的外部中断通道
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2，
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03; //子优先级3
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
    NVIC_Init(&NVIC_InitStructure);
}


//外部中断0服务程序
void EXTI0_IRQHandler(void)
{
if(key_dir())
{
keyDir=1;
}
else
{
keyDir=2;
}
EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位
}

1万 · 2021-8-4 19:06

STM32F407

#define key_b PBin(4)
#define key PAin(15)
#define key_run PAin(3)

void key_init(void);//初始化

void key_init(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOF时钟

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_3;//LED0和LED1对应IO口
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOE2,3,4

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//使能SYSCFG时钟
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource3);//PE3 连接到中断线3

EXTI_InitStructure.EXTI_Line = EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;//中断线使能
EXTI_Init(&EXTI_InitStructure);//配置

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;//外部中断3
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;//抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
}

//外部中断3服务程序
void EXTI3_IRQHandler(void)
{
if(key_b==0)
{
printf("正转\r\n");
}
else
{
printf("反转\r\n");
}
EXTI_ClearITPendingBit(EXTI_Line3);  //清除LINE3上的中断标志位
}

只看该作者 · 2021-8-5 09:38

没太看懂，
类似的应用
我是用的码盘，光电传感器