STM32红外遥控的控制代码

STM32红外遥控的控制代码一般分为两部分：红外解码和遥控控制。下面是一个简单的例子，可以帮助您快速入门：

红外解码部分：

#include "stm32f10x.h"
#include "ir_decode.h"

uint16_t ir_time_buf[50]; //存储每个脉冲的时间
uint8_t ir_time_buf_len; //存储脉冲数量

//红外解码中断处理函数
void EXTI0_IRQHandler(void)
{
    static uint8_t idx = 0; //当前处理的脉冲序号
    static uint8_t ir_status = 0; //红外解码状态
    static uint16_t last_time = 0; //上一次脉冲的时间
    uint16_t this_time; //本次脉冲的时间
    
    if (EXTI_GetITStatus(EXTI_Line0) != RESET) //检查是否有中断发生
    {
        this_time = TIM_GetCounter(TIM2); //获取当前计数器的值
        TIM_SetCounter(TIM2, 0); //清零计数器
        EXTI_ClearITPendingBit(EXTI_Line0); //清除中断标志位
        
        if (ir_status == 0) //如果当前状态为未开始
        {
            if (this_time > 8000 && this_time < 10000) //接收到起始位
            {
                ir_status = 1; //状态转为已接收到起始位
                idx = 0; //脉冲序号清零
            }
        }
        else if (ir_status == 1) //如果当前状态为已接收到起始位
        {
            if (this_time > 3500 && this_time < 4500) //接收到逻辑位“0”的脉冲
            {
                ir_time_buf[idx++] = this_time - last_time; //计算脉冲时间并存储
                last_time = this_time; //更新上一次脉冲的时间
            }
            else if (this_time > 7000 && this_time < 8000) //接收到逻辑位“1”的脉冲
            {
                ir_time_buf[idx++] = this_time - last_time; //计算脉冲时间并存储
                last_time = this_time; //更新上一次脉冲的时间
            }
            else if (this_time > 13000 && this_time < 14000) //接收到重复码
            {
                ir_status = 2; //状态转为已接收到重复码
                ir_time_buf_len = idx; //记录脉冲数量
                idx = 0; //脉冲序号清零
            }
            else //接收到错误码，重置状态
            {
                ir_status = 0;
                idx = 0;
            }
        }
        else if (ir_status == 2) //如果当前状态为已接收到重复码
        {
            if (this_time > 3500 && this_time < 4500) //接收到逻辑位“0”的脉冲
            {
                if (idx >= ir_time_buf_len) //如果已经发送完所有的脉冲，则重新发送起始位
                {
                    idx = 0;
                    ir_status = 1;
                    return;
                }
                TIM_SetCompare1(TIM3, TIM_GetCapture1(TIM3) + ir_time_buf[idx++]); //设置PWM输出时间长度
            }
            else if (this_time > 7000 && this_time < 8000) //接收到逻辑位“1”的脉冲
            {
                if (idx >= ir_time_buf_len) //如果已经发送完所有的脉冲，则重新发送起始位
                {
                    idx = 0;
                    ir_status = 1;
                    return;
                }
                TIM_SetCompare1(TIM3, TIM_GetCapture1(TIM3) + ir_time_buf[idx++]); //设置PWM输出时间长度
            }
            else //接收到错误码，重置状态
            {
                ir_status = 0;
                idx = 0;
            }
        }
    }
}

遥控控制部分：

#include "stm32f10x.h"
#include "ir_decode.h"

//初始化红外解码模块
void IR_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE); //使能GPIOA时钟和复用功能时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3, ENABLE); //使能TIM2和TIM3时钟

    /* 配置GPIOA.0为中断输入 */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* 配置TIM2 */
    TIM_TimeBaseStructure.TIM_Period = 65535; //计数器最大值
    TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock / 1000000) - 1; //预分频系数，时钟频率为1MHz
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频因子，不分频
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数模式
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
    TIM_Cmd(TIM2, ENABLE); //使能TIM2

    /* 配置TIM3 */
    TIM_TimeBaseStructure.TIM_Period = 840 - 1; //计数器最大值，时钟频率为84MHz，PWM周期为20ms（50Hz）
    TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock / 840000) - 1; //预分频系数，时钟频率为100kHz
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频因子，不分频
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数模式
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    /* 配置TIM3通道1为PWM输出 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //PWM模式1，逆变器输出高电平占空比为70%
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //使能PWM输出
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //设置输出极性为高电平有效
    TIM_OCInitStructure.TIM_Pulse = (840 * 7) / 10 - 1; //设置PWM输出初始值，时钟频率为84MHz，逆变器输出高电平占空比为70%
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能PWM输出预装载

    /* 配置中断 */
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; 
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; 
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    EXTI_InitStructure.EXTI_Line = EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);
}

请注意，这只是一个简单的例子。实际应用中，您需要根据具体遥控器的编码格式进行修改和扩展。同时，您还需要根据具体硬件平台进行调整。