电视机红外遥控遥控知识学习

硬件开发88 · 发表于 2012-9-26 21:28:15

         电视机红外遥控至少学习，前段时间在家里研究红外通信原理，市场上遥控器有很多种 ENC协议是小日本，市场上用的比较多，我手上这个电视遥控器是个杂牌子，遥控器是42位编码，引导码低电平9ms 引导吗高电平5ms 接下来关键地方是用户码
用户码头是用来区别不同型号的遥控器，这是我手头遥控器 13位用户正吗0010001110000
                                                                                       13为用户反码1101110001111 和正码相反
                                                                           接下来就是8位按键正码 00000000
                                                                                          8位按键反码 11111111

                  我自己把手头遥控器的解码程序写出来程序代码如下，本人测试成功

/**********************************************************************************
*       STM32F103VET6 红外驱动【遥控器解码实验程序】
*
*    遥控器：42位编码
*
***********************************************************************************/
#include "stm32f10x.h"
#include "exti.h"
#include "beep.h"
#include "SysTick.h"

#define LED1_0    GPIOD->BRR  = 0x00000100 //LED低电平
#define LED2_0    GPIOD->BRR  = 0x00000200
#define LED3_0    GPIOD->BRR  = 0x00000400
#define LED4_0    GPIOD->BRR  = 0x00000800

#define LED1_1    GPIOD->BSRR = 0x00000100       //LED高电平
#define LED2_1    GPIOD->BSRR = 0x00000200
#define LED3_1    GPIOD->BSRR = 0x00000400
#define LED4_1    GPIOD->BSRR = 0x00000800

#define IR_Hongwai_0       GPIOE->BRR  = 0x00000004 //红外数据低电平
#define IR_Hongwai_1       GPIOE->BSRR = 0x00000004 //红外数据高电平
#define IR_Hongwai_x GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_2)  //读取红外电平状态

unsigned char TimeByte;
unsigned int IR_Tireafg[4];
unsigned int IR_xidwrit[8] = {0, 0, 0, 0, 0, 0 ,0, 0};

/*
* GPIO端口配置子函数
*/
void GPIO_InitStructReadtempCmd(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2;    //配置GPIO管脚
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;    //配置管脚为输入上拉
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    //配置管脚速率50MHZ
GPIO_Init(GPIOE, &GPIO_InitStruct);    //初始化指定端口

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;    //配置管脚陪推挽式输出
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStruct);
}

/*
* 配置外设时钟子函数
*/
void RCC_APB2PeriphReadtempyCmd(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  //打开GPIOB外设时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);  //打开GPIOE外设时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);  //打开GPIOD外设时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO , ENABLE);  //打开AFIO复用功能外设时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
}

/*
* 计算低脉宽持续时间Count1 * 10us
*/
unsigned int IR_HongwaiRead_LSB_Cmd()
{
unsigned int Count1 = 0;    //定义时间变量
IR_Hongwai_0;    //红外数据低电平
do    //进入循环体
{
Count1++;    //时间变量加1
Delay_10us(1);    //延时10us
} while(IR_Hongwai_x == 0);  //判断条件如果读出来的红外数据为高电平跳出循环体

return(Count1);    //返回时间变量积数
}

/*
* 计算高脉宽持续时间Count2 * 10us
*/
unsigned int IR_HongwaiRead_MSB_Cmd()
{
unsigned int Count2 = 0;    //定义时间变量
IR_Hongwai_1;    //红外数据高电平
do    //进入循环体
{
Count2++;    //时间变量加1
Delay_10us(1);    //延时10us
} while(IR_Hongwai_x == 1);  //判断条件如果读出来的红外数据为低电平跳出循环体
return(Count2);
}

/*
* 函数主体
*/
int main(void)
{
SystemInit();    //初始化系统时钟进入72M主频
SYSTICK_InitStructReadTCmd();    //初始化SysTick配置器寄存器
RCC_APB2PeriphReadtempyCmd();    //初始化外设时钟配置寄存器
GPIO_InitStructReadtempCmd();    //初始化GPIO端口配置寄存器
EXTI_InitStructReadtempCmd();    //初始化EXTI外部线路寄存器
NVIC_InitStructReadtempCmd();    //初始化NVIC中断配置寄存器

while(1)
{

}
}

/*
* EXTI外部中断线服务程序
*/
void EXTI2_IRQHandler(void)
{
unsigned char i = 0;
unsigned char flag = 1;
// unsigned char flag1 = 1;
unsigned int Countline2 = 0;
IR_Hongwai_1;
Countline2 = IR_HongwaiRead_LSB_Cmd();    //低电平引导码 9ms判断
if((Countline2 < 850) || (Countline2 > 950)) //小于8694us 大于9272us 一直循环否则跳出
{
return;
}
Countline2 = IR_HongwaiRead_MSB_Cmd();    //高电平引导码 4.5ms判断
if((Countline2 < 400) || (Countline2 > 450)) //小于4195us 大于4712us 一直循环否则跳出
{
return;
}
TimeByte = 0;
for(i = 1; i < 14; i++)
{
TimeByte = TimeByte >> 1;
Countline2 = IR_HongwaiRead_LSB_Cmd();    //低电平延时0.56 判断
if((Countline2 < 40) || (Countline2 > 85))//小于425us 大于851us 一直循环否则跳出
{
return;
}

Countline2 = IR_HongwaiRead_MSB_Cmd();    //高电平延时0.56判断
if((Countline2 < 40) || (Countline2 > 200))//小于425us 大于1793us 一直循环否则跳出
{
return;
}
if( Countline2 > 130)    //高电平延时大于1300us写1否则写0
{
TimeByte |= 0x80;    //写1
}
}
IR_Tireafg[0] = TimeByte;
TimeByte = 0;

for(i = 14; i < 27; i++)
{
TimeByte = TimeByte >> 1;
Countline2 = IR_HongwaiRead_LSB_Cmd();
if((Countline2 < 40) || (Countline2 > 85))
{
return;
}

Countline2 = IR_HongwaiRead_MSB_Cmd();
if((Countline2 < 40) || (Countline2 > 200))
{
return;
}
if( Countline2 > 130)
{
TimeByte |= 0x80;
}
}
IR_Tireafg[1] = TimeByte;
TimeByte = 0;

for(i = 27; i < 35; i++)
{
TimeByte = TimeByte >> 1;
Countline2 = IR_HongwaiRead_LSB_Cmd();
if((Countline2 < 40) || (Countline2 > 85))
{
return;
}

Countline2 = IR_HongwaiRead_MSB_Cmd();
if((Countline2 < 40) && (Countline2 > 200))
{
return;
}
if( Countline2 > 130)
{
TimeByte |= 0x80;
}
}
IR_Tireafg[2] = TimeByte;
TimeByte = 0;

for(i = 35; i < 43; i++)
{
TimeByte = TimeByte >> 1;
Countline2 = IR_HongwaiRead_LSB_Cmd();
while((Countline2 < 40) || (Countline2 > 85))
{
return;
}

Countline2 = IR_HongwaiRead_MSB_Cmd();
while((Countline2 < 40) || (Countline2 > 200))
{
return;
}
if( Countline2 > 130)
{
TimeByte |= 0x80;
}
}
IR_Tireafg[3] = TimeByte;

//************************判断用户正码和反码***************************************//
do
{
if(IR_Tireafg[0] == 0x08 & IR_Tireafg[1] == 0xF7 )
{
flag = 0;
}
} while(flag == 1);
//************************判断按键正码和反码***************************************//
/* do
{
if(IR_Tireafg[2] == ~IR_Tireafg[3])
{
flag1 = 0;
}
} while(flag1 == 0);       */

//************************按下键码对应LED点亮**************************************//
switch  (IR_Tireafg[2])
{
case       0x00:    //按键 0
   LED1_1; LED2_0; LED3_0; LED4_0;
   break;

case       0x01: //按键 1
   LED1_0; LED2_1; LED3_0; LED4_0;
   break;

case       0x02:    //按键 2
   LED1_0; LED2_0; LED3_1; LED4_0;
   break;

case       0x03:    //按键 3
   LED1_0; LED2_0; LED3_0; LED4_1;
   break;

case       0x04:    //按键 4
   LED1_0; LED2_0; LED3_1; LED4_0;
   break;

case       0x05:    //按键 5
   LED1_0; LED2_1; LED3_0; LED4_0;
   break;

case       0x06:    //按键 6
   LED1_1; LED2_0; LED3_0; LED4_0;
   break;

case       0x07:    //按键 7
   LED1_1; LED2_0; LED3_1; LED4_0;
   break;

case       0x08:    //按键 8
   LED1_0; LED2_0; LED3_0; LED4_0;
   break;

case       0x09:    //按键 9
   LED1_0; LED2_1; LED3_0; LED4_1;
   break;

case       0x15:    //静音键
   LED1_0; LED2_1; LED3_1; LED4_0;
   break;

case       0x1C:    //开机键
   LED1_1; LED2_0; LED3_0; LED4_1;
   break;

case       0x14:    //OSD键
   LED1_1; LED2_1; LED3_0; LED4_0;
   break;

case       0x0E:    //RECALL键
   LED1_0; LED2_0; LED3_1; LED4_1;
   break;

case       0x19:    //SLEEP键
   LED1_1; LED2_1; LED3_1; LED4_0;
   break;

case       0x0A:    //A/C键
   LED1_0; LED2_1; LED3_1; LED4_1;
   break;

case       0x0F:    //TV/AV键
   LED1_1; LED2_1; LED3_1; LED4_1;
   break;

case       0x13:    //PP键
   LED1_1; LED2_0; LED3_1; LED4_0;
   break;

case       0x0C:    //GAME键
   LED1_0; LED2_1; LED3_1; LED4_1;
   break;

case       0x1E:    //V-键
   LED1_1; LED2_1; LED3_1; LED4_0;
   break;

case       0x1F:    //V+键
   LED1_0; LED2_0; LED3_1; LED4_0;
   break;

case       0x1B:    //P+键
   LED1_0; LED2_0; LED3_0; LED4_1;
   break;

case       0x1A:    //P-键
   LED1_1; LED2_0; LED3_0; LED4_0;
   break;

case       0x10:    //MENU键
   LED1_0; LED2_1; LED3_0; LED4_0;
   break;

   default  :    break;

}
// Beep_lookCmd();    //蜂鸣器按键音
EXTI_ClearITPendingBit(EXTI_Line2); //清除EXTI2外部线路挂起位

}

/*******************************************END****************************************/

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