红外遥控实验
实验现象
当按下遥控器上某个按键,串口输出该按键的名称
理论学习
实验使用红外接收头VS1838+红外遥控器,VS1838使用NEC码编码格式
NEC码格式:
1.使用38kHz载波频率2.引导码间隔是9ms+4.5ms3.使用16位客户代码4.使用8位数据代码和8位取反的数据代码二进制0和1的表示方法:
原理图
代码编写
#include <IRremote.h>
int RECV_PIN = 11;//端口声明
int LED1 = 2;
int LED2 = 3;
int LED3 = 4;
int LED4 = 5;
int LED5 = 6;
int LED6 = 7;
long on1 = 0x00FF6897;//编码示例,与发送匹配用
long off1 = 0x00ff30CF;
long on2 = 0x00FF9867;
long off2 = 0x00FF18E7;
long on3 = 0x00FFB04F;
long off3 = 0x00FF7A85;
long on4 = 0x00FF10EF;
long off4 = 0x00FF42BD;
long on5 = 0x00FF38C7;
long off5 = 0x00FF4AB5;
long on6 = 0x00FF5AA5;
long off6 = 0x00FF52AD;
IRrecv irrecv(RECV_PIN);
decode_results results;//结构声明
// Dumps out the decode_results structure.
// Call this after IRrecv::decode()
// void * to work around compiler issue
//void dump(void *v) {
// decode_results *results = (decode_results *)v
void dump(decode_results* results)
{
int count = results->rawlen;
if (results->decode_type == UNKNOWN)
{
Serial.println("Could not decode message");
}
else
{
if (results->decode_type == NEC)
{
Serial.print("Decoded NEC: ");
}
else if (results->decode_type == SONY)
{
Serial.print("Decoded SONY: ");
}
else if (results->decode_type == RC5)
{
Serial.print("Decoded RC5: ");
}
else if (results->decode_type == RC6)
{
Serial.print("Decoded RC6: ");
}
Serial.print(results->value, HEX);
Serial.print(" (");
Serial.print(results->bits, DEC);
Serial.println(" bits)");
}
Serial.print("Raw (");
Serial.print(count, DEC);
Serial.print("): ");
for (int i = 0; i < count; i++)
{
if ((i % 2) == 1)
{
Serial.print(results->rawbuf[i] * USECPERTICK, DEC);
}
else
{
Serial.print(-(int)results->rawbuf[i] * USECPERTICK, DEC);
}
Serial.print(" ");
}
Serial.println("");
}
void setup()
{
pinMode(RECV_PIN, INPUT); //端口模式,输入
pinMode(LED1, OUTPUT);//端口模式,输出
pinMode(LED2, OUTPUT);//端口模式,输出
pinMode(LED3, OUTPUT);//端口模式,输出
pinMode(LED4, OUTPUT);//端口模式,输出
pinMode(LED5, OUTPUT);//端口模式,输出
pinMode(LED6, OUTPUT);//端口模式,输出
pinMode(13, OUTPUT); 端口模式,输出
Serial.begin(9600); //波特率9600
irrecv.enableIRIn(); // Start the receiver
}
int on = 0;
unsigned long last = millis();
void loop()
{
if (irrecv.decode(&results)) //调用库函数:解码
{
// If it's been at least 1/4 second since the last
// IR received, toggle the relay
if (millis() - last > 250)
{
on = !on;
digitalWrite(13, on ? HIGH : LOW);
dump(&results);
}
if (results.value == on1)
digitalWrite(LED1, HIGH);
if (results.value == off1)
digitalWrite(LED1, LOW);
if (results.value == on2)
digitalWrite(LED2, HIGH);
if (results.value == off2)
digitalWrite(LED2, LOW);
if (results.value == on3)
digitalWrite(LED3, HIGH);
if (results.value == off3)
digitalWrite(LED3, LOW);
if (results.value == on4)
digitalWrite(LED4, HIGH);
if (results.value == off4)
digitalWrite(LED4, LOW);
if (results.value == on5)
digitalWrite(LED5, HIGH);
if (results.value == off5)
digitalWrite(LED5, LOW);
if (results.value == on6)
digitalWrite(LED6, HIGH);
if (results.value == off6)
digitalWrite(LED6, LOW);
last = millis();
irrecv.resume(); // Receive the next value
}
}