View source for Lesson 36--Microduino Infrared Remote Control Changes EEPROM values

{{Language|第三十六课--Microduino 红外遥控器更改EEPROM值}}
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==Objective==
This tutorial will teach you how to control EEPROM's value using infrared, and display the value in Microduino-OLED.

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''
*Other equipment:
**Breadboard Jumper            one box   
**Breadboard  	               one piece  
**USB Data cable               one
**The infrared receiver        one
**Remote control               one


==Schematic==
[[File:第三十六课-Microduino红外更改EEPROM原理图.jpg|600px|center|thumb]]

==Program==
<source lang="cpp">

#include <IRremote.h>
#include <avr/eeprom.h>
#include "U8glib.h"
#define EEPROM_write(address, var) eeprom_write_block((const void *)&(var), (void *)(address), sizeof(var))
#define EEPROM_read(address, var) eeprom_read_block((void *)&(var), (const void *)(address), sizeof(var))

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE);//Define OLED connection method

int action;//Record remote control button
int t;//Initial value
int RECV_PIN = 11;//Define infrared receiver pin 11
IRrecv irrecv(RECV_PIN);
decode_results results;

// Define a config_type structure contains a int variable
struct config_type
{
  int num;
};


void draw(int changeNum) {
  // 1) Define structure variable config and set the initial value
  config_type config;
  config.num = changeNum;
  // 2) Store the config to EEPROM, from the address 0 to write
  EEPROM_write(0, config);
  // 3) Read the value from address 0, then stored into config_readback
  config_type config_readback;
  EEPROM_read(0, config_readback);
  u8g.setFont(u8g_font_unifont);//Font 1
  u8g.drawStr( 0, 16, "Num:");
  u8g.setFont(u8g_font_7x13);//Font 2
  u8g.setPrintPos(0, 32);
  u8g.print(config_readback.num);

}  


int deckey(unsigned long t)
{
  switch(t){
  case 0xFD08F7://Button 1 encoding
    return 1;
    break;
  case 0xFD8877://Button 2 encoding
    return 2;
    break;
  case 0xFD48B7://Button 3 encoding
    return 3;
    break;
  case 0xFD28D7://Button 4 encoding
    return 4;
    break;
  case 0xFDA857://Button 5 encoding
    return 5;
    break;
  case 0xFD6897://Button 6 encoding
    return 6;
    break;
  case 0xFD18E7://Button 7 encoding
    return 7;
    break;
  case 0xFD9867://Button 8 encoding
    return 8;
    break;
  case 0xFD58A7://Button 9 encoding
    return 9;
    break;
  default:
    return 0;
    break;
  }
} 

void setup()
{
  irrecv.enableIRIn(); // Intilize the infrared receiver
  t=0;
}

void loop()
{
  if (irrecv.decode(&results))
  {
    action=deckey(results.value);
    u8g.firstPage();  
    do {
      draw(action);
    } 
    while( u8g.nextPage() ); 

    delay(10);
    irrecv.resume();
  }
}





</source>

==Debug==
Step 1: Copy the code to IDE and compile it

Step 2: Set up circuit, as follows:
[[File:第三十六课-Microduino红外更改EEPROM连接图.jpg|600px|center|thumb]]
Step 3: Run program

Step 4: Put the remote control toward infrared receiver, then press the button. Observe the OLED and check the result.

==Result==
OLED will display the value of remote control's button and store the value into EEPROM.
==Video==