STM32旋钮编码器调光器程序

下面是一个基于STM32单片机和旋钮编码器的调光器程序示例：

#include "stm32f10x.h"

#define LED_PIN GPIO_Pin_13
#define LED_PORT GPIOC

#define ENCODER_PIN1 GPIO_Pin_0
#define ENCODER_PIN2 GPIO_Pin_1
#define ENCODER_PORT GPIOA

volatile uint8_t encoderState = 0;
volatile uint8_t lastEncoderState = 0;
volatile int16_t encoderCount = 0;

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

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

    GPIO_InitStructure.GPIO_Pin = ENCODER_PIN1 | ENCODER_PIN2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(ENCODER_PORT, &GPIO_InitStructure);

    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource1);

    EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

void LED_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
    GPIO_InitStructure.GPIO_Pin = LED_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(LED_PORT, &GPIO_InitStructure);
}

void TIM3_Init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    TIM_TimeBaseStructure.TIM_Period = 1000;
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);

    TIM_Cmd(TIM3, ENABLE);
    TIM_CtrlPWMOutputs(TIM3, ENABLE);
}

void EXTI0_IRQHandler(void)
{
    if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN1) == 1)
    {
        if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN2) == 0)
        {
            encoderState = 1;
        }
        else
        {
            encoderState = 2;
        }
    }
    else
    {
        if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN2) == 1)
        {
            encoderState = 3;
        }
        else
        {
            encoderState = 4;
        }
    }

    if (encoderState != lastEncoderState)
    {
        if ((lastEncoderState == 1 && encoderState == 2) ||
            (lastEncoderState == 2 && encoderState == 4) ||
            (lastEncoderState == 4 && encoderState == 3) ||
            (lastEncoderState == 3 && encoderState == 1))
        {
            encoderCount++;
        }
        if ((lastEncoderState == 2 && encoderState == 1) ||
            (lastEncoderState == 4 && encoderState == 2) ||
            (lastEncoderState == 3 && encoderState == 4) ||
            (lastEncoderState == 1 && encoderState == 3))
        {
            encoderCount--;
        }
        lastEncoderState = encoderState;
    }

    EXTI_ClearITPendingBit(EXTI_Line0);
}

void EXTI1_IRQHandler(void)
{
    if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN2) == 1)
    {
        if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN1) == 1)
        {
            encoderState = 3;
        }
        else
        {
            encoderState = 4;
        }
    }
    else
    {
        if (GPIO_ReadInputDataBit(ENCODER_PORT, ENCODER_PIN1) == 0)
        {
            encoderState = 1;
        }
        else
        {
            encoderState = 2;
        }
    }

    if (encoderState != lastEncoderState)
    {
        if ((lastEncoderState == 1 && encoderState == 2) ||
            (lastEncoderState == 2 && encoderState == 4) ||
            (lastEncoderState == 4 && encoderState == 3) ||
            (lastEncoderState == 3 && encoderState == 1))
        {
            encoderCount++;
        }
        if ((lastEncoderState == 2 && encoderState == 1) ||
            (lastEncoderState == 4 && encoderState == 2) ||
            (lastEncoderState == 3 && encoderState == 4) ||
            (lastEncoderState == 1 && encoderState == 3))
        {
            encoderCount--;
        }
        lastEncoderState = encoderState;
    }

    EXTI_ClearITPendingBit(EXTI_Line1);
}

int main(void)
{
    Encoder_Init();
    LED_Init();
    TIM3_Init();

    while (1)
    {
        if (encoderCount > 0)
        {
            TIM3->CCR1 += 10;
            encoderCount--;
        }
        if (encoderCount < 0)
        {
            TIM3->CCR1 -= 10;
            encoderCount++;
        }
        if (TIM3->CCR1 > 1000)
        {
            TIM3->CCR1 = 1000;
        }
        if (TIM3->CCR1 < 0)
        {
            TIM3->CCR1 = 0;
        }
        if (encoderCount != 0)
        {
            GPIO_WriteBit(LED_PORT, LED_PIN, Bit_SET);
        }
        else
        {
            GPIO_WriteBit(LED_PORT, LED_PIN, Bit_RESET);
        }
    }
}

以上是一个简单的STM32旋钮编码器调光器程序示例，其主要实现了旋钮编码器的读取和LED灯的控制。需要注意的是，该程序仅供参考，具体实现应根据需要进行调整和优化。