stm32单片机万能遥控器，亲测可用控制空调 -

/***************************************************************************************
* FileName : Infrared.c
* CopyRight :
* ModuleName :
*
* CPU :
* RTOS :
*
* Create Data : 2015/04/21
* Author/Corportation : Ray
*
* Abstract Description :
*
*--------------------------------Revision History--------------------------------------
* No version Data Revised By Item Description
* 1 v1.0 2015/4/21 Ray Create this file
* 2 v2.0 2015/4/23 Ray Sucessfully control the air conditioner
* 3 v2.1 2015/4/24 Ray Packaging the Infrared Module
*
***************************************************************************************/
/**************************************************************
* Debug switch Section
**************************************************************/
/**************************************************************
* Include File Section
**************************************************************/
#include "Infrared.h"
/**************************************************************
* Macro Define Section
**************************************************************/
//debug调试宏定义，根据表达式a的真假执行has_bug或no_bug
#define BUG_DETECT_PRINT(a,has_bug,no_bug) { if(a) \
printf("%s",has_bug); \
else \
printf("%s",no_bug);}
/**************************************************************
* Struct Define Section
**************************************************************/
/**************************************************************
* Prototype Declare Section
**************************************************************/
/**************************************************************
* Global Variable Declare Section
**************************************************************/
u8 Flag_LearnState = 0;
u16 PulseTab[MAX_PULSE_LEN];
/**************************************************************
* File Static Variable Define Section
**************************************************************/
/**************************************************************
* Function Define Section
**************************************************************/
#ifdef INFRARED_RECEIVE
/**
* @name void Infrared_GPIO_Configuration()
* @description 红外接收端GPIO口设置
* @param PA.01 作外部中断接收口
* @return
* @notice
*/
void Infrared_GPIO_Configuration()
{
GPIO_InitTypeDef GPIO_InitType;
RCC_APB2PeriphClockCmd(INFRARED_RCC_GPIOx,ENABLE);
GPIO_InitType.GPIO_Mode = GPIO_Mode_IPU; //上拉输入
GPIO_InitType.GPIO_Pin = INFRARED_GPIO_Pinx;
GPIO_InitType.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(INFRARED_GPIOx,&GPIO_InitType);
GPIO_EXTILineConfig(INFRARED_EXTI_GPIOx,INFRARED_EXTI_Line);
}
/**
* @name void Infrared_EXTI_Configuration()
* @description 红外线接受端外部中断初始化设置，设置为线路1，使用PA.1作为外部中断的输入端
* @param
* @return
* @notice 若改变外部中断的输入端，此函数内的线路设置也需改变s
*/
void Infrared_EXTI_Configuration()
{
EXTI_InitTypeDef EXTI_InitType;
NVIC_InitTypeDef NVIC_InitType;
EXTI_InitType.EXTI_Line = EXTI_Line1;
EXTI_InitType.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitType.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitType.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitType);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //NVIC 中断设置
NVIC_InitType.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitType.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitType.NVIC_IRQChannelSubPriority = 0;
NVIC_InitType.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitType);
}
/**
* @name void EXTI1_IRQHandler()
* @description 外部中断1中断处理程序，用于采集红外波形
* @param
* @return 全局变量Flag_LearnState可以用于返回是否有学习到波形
* @notice
*/
void EXTI1_IRQHandler()
{
u16 pulseWidth = 0;
u16 i = 0;
Flag_LearnState = 0;
//中断指示
while(1)
{
if(IR_RDATA) //有高脉冲出现，代表空闲信号
{
pulseWidth = 0;
while(IR_RDATA)
{
pulseWidth++;
delay_us(19);
if(pulseWidth >= 2000) // >40ms 则结束记录
break;
}
if(pulseWidth<=15 || pulseWidth>=2000) // >40ms || <300us 则结束记录
break;
PulseTab[i] = pulseWidth*20;
i++;
}
else //载波信号,偶数位为低电平（载波），奇数位为高电平（空闲）
{
pulseWidth = 0;
while(IR_RDATA == 0)
{
pulseWidth++;
delay_us(19);
}
if(pulseWidth<=15 || pulseWidth>=2000) // >40ms || <300sus 则结束记录
break;
PulseTab[i] = pulseWidth*20;
i++;
}
}
PulseTab[i++] = pulseWidth;
PulseTab[i] = 0xffff;
Flag_LearnState = 1;
Infrared_Send();
EXTI_ClearITPendingBit(EXTI_Line1);
return;
}
#endif
#ifdef INFRARED_SEND
/**
* @name void Infrared_Send()
* @description 红外发射，根据 PulseTab[]内的数据发波形
* @param
* @return
* @notice
*/
void Infrared_Send()
{
u16 i;
EXTI->IMR &= ~(0x00000002); //关中断，避免发送的红外线被自己接受
for(i=0; i<MAX_PULSE_LEN && PulseTab[i]!=0xffff; i++)
{
if(i%2 == 0)
{
TIM_Cmd(TIM2,ENABLE);
delay_us(PulseTab[i]);
TIM_Cmd(TIM2,DISABLE);
GPIO_SetBits(GPIOA,GPIO_Pin_0);
}
else
{
GPIO_SetBits(GPIOA,GPIO_Pin_0);
delay_us(PulseTab[i]);
}
}
GPIO_ResetBits(GPIOA,GPIO_Pin_0);
EXTI->IMR |= (0x00000002); //开中断
}
/**
* @name void TIM2_PWM_Init(u16 arr,u16 psc)
* @description 初始化定时器2的设置，将定时器2用于PWM调制，PWM输出口为 PA.0
* @param arr -- u16,定时器重装值
psc -- u16,定时器分频值
* @return
* @notice PWM频率 = 72M/((arr+1)*(psc+1)),这里用作红外发射的载波，需要生成38kHz的方波，故取arr = 1895,psc = 0。
*/
void TIM2_PWM_Init(u16 arr,u16 psc)
{
/* 初始化结构体定义 */
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* 使能相应端口的时钟 */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能定时器2时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIO外设时钟
/* GPIOA.0初始化 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; // TIM2 CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // PA.0 复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_0);
/* TIM2 初始化*/
TIM_TimeBaseInitStructure.TIM_Period = arr; //下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseInitStructure.TIM_Prescaler = psc; //作为TIMx时钟频率除数的预分频值
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分割:TDTS = Tck_tim
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);
/* 定时器TIM2 Ch1 PWM模式初始化 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM PWM1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
//TIM_OCInitStructure.TIM_Pulse = (arr+1)/2; //占空比 50%
TIM_OCInitStructure.TIM_Pulse = (arr+1)/3; //占空比1:3
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
/* 使能TIM2在CCR1上的预装载寄存器 */
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
/* 使能定时器 */
// TIM_Cmd(TIM2,ENABLE);
}
#endif
/**
* @name
* @description
* @param
* @return
* @notice
*/
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
while (1)
{}
}
#endif

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