Difference between revisions of "Ethernet multi-function Interface"
(Added Config Eeprom interface) |
m (moved Ethernet to IR and Serial Console Interface to Ethernet multi-function Interface: Added new functions - title is no more correct) |
(No difference)
| |
Revision as of 17:15, 11 September 2012
Using an Arduino Ethernet board, you can send IR codes to your TV or BD
With the same board, you can also interface to the Serial Console.
Contents
[hide]What you can do
- Send IR codes to your TV, PVR or BD, with an URL in your browser
- Use telnet to have the Serial Console on your PC or smartphone
- Read your config eeprom
Bill of materials
- Arduino Ethernet board (see Arduino)
Alternatively, an Arduino Uno with an Ethernet shield could also be used
- IR led (SFH4510 for example) or RED Led (Clear Type RED LED's are emitting more than enough light at IR spectrum)
- 220 ohms resistor to limit current in the IR led
- If you plan to use the telnet interface to the Serial Console, make sure you have a 100 ohms resistor on both RX and TX signals (Arduino TX/RX are 5v !)
How to use it
- Upload the following sketch into your Arduino
- Connect the IR or RED led with its resistor on pin 8 on the Arduino
- Connect power and network
- Find the IP address of the board on your DHCP (or use the static IP embedded in the sketch if you don't have DHCP)
- Use your browser to send an URL to the board (see format below)
- If you want to use telnet to connect to the Serial Console :
* Connect your Serial Console signals TX&RX to the Arduino board pins 0&1 (with 100 ohms resistors) * Use Putty with options 'Local Echo' and 'Local line editing' forced to OFF
- If you want to read your config eeprom :
* Connect the eeprom SDA&SCK signals to the Arduino board pins A4/A5 (with a 100 ohms resistors) * Connect the eeprom GND to 0v
URL format to send IR codes
The format is http://IP/ir.htm?data=XX&type=Y&device=ZZZZ where
- IP is the Arduino board IP address
- XX is the IR code to send
- Y is 0 for TV/PVR frame format and 1 for BD frame format
- ZZZZ is the device code (0707 for TV, 0505 for PVR, 301A for BD)
The IR codes are listed at Key codes
- For TV/PVR, use the 'code' column
- For BD, use the 'BD-IR code' column
For example:
To get the Service Menu on your TV, use the 2 following URLs :
Please note that you cannot send KEY_FACTORY to a BD, as the corresponding code is not know yet
To have a kind of Wake Up on LAN on your BD player, use
To switch to channel 1 :
- On a TV : http://IP/ir.htm?data=65&type=0&device=0707
- On a BD : http://IP/ir.htm?data=81&type=0&device=301A
URL format to read config Eeprom
The format is http://IP/read?read?format=F&device=D&addr=A&size=S
- IP is the Arduino board IP address
- F is 0 to get the result in html, 1 to download a binary file
- D is the Eeprom device identification (80 by default)
- A is the starting address for reading (0 by default)
- S is the number of bytes to read (default=256)
For example:
BD-E8300 is equiped with a 24512 eeprom (64 kbytes)
To download its whole config :
or :
Eeprom connection :
IR frames format
BD players use a modified IR frame format that TV and PVR. The reason is that samsung increased the data field length from 8 to 12 bits The general format is now :
- Start bit
- Device ID (16 bits - 0707 for TV, 301A for BD)
- For BD only : Stop bit and data MSB on 4 bits
- Data LSB
- Data LSB 1's complement
A frame for BD :
Arduino sketch
// ---------------------------------------------------------------------
// Samsung multi-functions ethernet interface
// - Send IR frame with http get requests
// - Debug console on telnet
// - Read & Write I2C config eeprom
//
// 29-06-2012 / v1.1 / oga83
// 11-09-2012 / v1.1 / oga83
// Added optionnal 'crc' url parameter for testing IR (allow to force CRC)
// Added I2C interface to read/write config eeprom
//----------------------------------------------------------------------
#include <SPI.h>
#include <Ethernet.h>
#include <Wire.h>
#define IRPIN 8 // IR led is connected on pin 8
#define LEDPIN 9 // Onboard led - blink at 2 Hz
// Debug console TX signal connected on 0
// Debug console RX signal connected on 1
// I2C Eeprom : SDA connected on A4
// I2C Eeprom : SCK connected on A5
byte mac[] = { 0x90, 0xA2, 0xda, 0x00, 0xe6, 0x5e }; // Arduino Ethernet board MAC address
IPAddress ip(192,168,1,178); // Default static IP if no DHCP
EthernetServer HttpServer(80); // HTTP is used to send IR commands
EthernetServer TelnetServer(23); // Telnet is used for Serial Console
// ---------------------------------------------------------------------
// Utilities
// ---------------------------------------------------------------------
// Convert a hex string to unsigned int
unsigned int HexToULong(char *s)
{
unsigned long u=0;
while (*s)
{
char c=*s++;
// Convert to uppercase
if (c>='a') c&=0xdf;
// Exit if not hex digit
if ((c<'0' || c>'9') && (c<'A' || c>'F')) break;
// Convert digit
u<<=4;
u|=c-((c>'9') ? 'A'-0xa:'0');
}
return u;
}
// ---------------------------------------------------------------------
// Samsung IR class
// ---------------------------------------------------------------------
class Samsung
{
private:
// Send a 36kHz-modulated pulse
static void Pulse(void)
{
byte i;
for (i=0; i<21; i++)
{
digitalWrite(IRPIN, HIGH);
delayMicroseconds(10); // Value adjusted with oscilloscope
digitalWrite(IRPIN, LOW);
delayMicroseconds(10); // Value adjusted with oscilloscope
}
}
// Send a bit
static void SendIRBit(byte b)
{
Pulse();
if (b)
delayMicroseconds(1390);
else
delayMicroseconds(430);
}
// Send 4 bits
static void SendIRNibble(byte b)
{
byte i;
for (i=0; i<4; i++)
SendIRBit((b>>i)&1);
}
// Send a byte
static void SendIRByte(byte b)
{
byte i;
for (i=0; i<8; i++)
SendIRBit((b>>i)&1);
}
public:
// Send an IR command
// Type is 0 for TV, 1 for BD
// Device is 0x0707 for TV, 0x301A for BD
// Crc should be ~Command, except for tests
static void SendCommand(char Type, unsigned int Device, unsigned int Command, unsigned char Crc)
{
byte i;
// Disable interrupts
cli();
// Start bit
for (i=0; i<8; i++) Pulse();
delayMicroseconds(4500);
// Send Device Id
SendIRByte(Device>>8);
SendIRByte(Device&0xff);
// BD Player
if (Type==1)
{
// Stop bit
Pulse();
delayMicroseconds(4500);
// Send Data
SendIRNibble(Command>>8);
}
SendIRByte(Command);
SendIRByte(Crc);
// Stop bit
Pulse();
delayMicroseconds(4500);
// Re-enable interrupts
sei();
}
// Read Eeprom
static void ReadEeprom(byte device, long addr, byte *data, int count)
{
if (addr!=0xffffffff)
{
Wire.beginTransmission(device);
Wire.write(addr>>8);
Wire.write(addr);
Wire.endTransmission();
}
Wire.requestFrom((int)device, count);
for (int i=0; i<count; i++)
{
if (!Wire.available()) break;
data[i]=Wire.read();
}
}
// Write Eeprom
static void WriteEeprom(byte device, long addr, byte *data, int count)
{
Wire.beginTransmission(device);
Wire.write(addr>>8);
Wire.write(addr);
for (int i=0; i<count; i++) Wire.write(data[i]);
Wire.endTransmission();
}
};
// ---------------------------------------------------------------------
// Initialization
// ---------------------------------------------------------------------
void setup()
{
// Led
pinMode(LEDPIN, OUTPUT);
digitalWrite(LEDPIN, HIGH);
// IR Led
pinMode(IRPIN, OUTPUT);
digitalWrite(IRPIN, HIGH);
// I2C
Wire.begin();
// Serial Console
Serial.begin(115200);
// Initialize Ethernet. Try DHCP, otherwise static IP
if (Ethernet.begin(mac)==0)
Ethernet.begin(mac, ip);
// Initialize HTTP server
HttpServer.begin();
// Initialize Telnet server
TelnetServer.begin();
}
// ---------------------------------------------------------------------
// Main Program
// ---------------------------------------------------------------------
char HttpFrame[256]; // General buffer for Http frames
char TelnetFrame[256]; // General buffer for Telnet frames
char Buffer[32]; // General buffer
boolean iStateLed=false; // Used for led blinking
unsigned long timeLastLedMs=0; // Used for blinking delay
void loop()
{
// -------------------------------------------------
// LED blinks at 2Hz
// -------------------------------------------------
if (millis()>timeLastLedMs+250)
{
timeLastLedMs=millis();
digitalWrite(LEDPIN, (iStateLed) ? HIGH:LOW);
iStateLed=!iStateLed;
}
// -------------------------------------------------
// Handle HTTP requests
// Example :
// To send KEY_1 on BD :
// http://IP/ir.htm?data=81&type=1&device=301a
// -------------------------------------------------
EthernetClient client = HttpServer.available();
if (client)
{
char *ptr=HttpFrame;
int n=0;
while (client.connected() && client.available())
{
if (n++<sizeof(HttpFrame))
*ptr++=client.read();
else
client.flush();
}
*ptr=0;
if (n>0)
{
__FlashStringHelper *HtmlHeader=F("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n");
// -------------------------------------------------
// Send Samsung IR command
// -------------------------------------------------
ptr=strstr(HttpFrame, "/ir.htm?");
if (ptr)
{
byte Type=0, Crc;
unsigned int Device=0x0707, Data=0;
ptr=strstr(HttpFrame, "data=");
if (ptr) Data=HexToULong(ptr+5);
ptr=strstr(HttpFrame, "type=");
if (ptr) Type=HexToULong(ptr+5);
ptr=strstr(HttpFrame, "device=");
if (ptr) Device=HexToULong(ptr+7);
// Next parameter is optional and can be used for tests
Crc=~Data;
ptr=strstr(HttpFrame, "crc=");
if (ptr) Crc=HexToULong(ptr+4);
Samsung::SendCommand(Type, Device, Data, Crc);
client.println(HtmlHeader);
client.println("OK !");
client.stop();
return;
}
// -------------------------------------------------
// Read Eeprom
// -------------------------------------------------
ptr=strstr(HttpFrame, "/read");
if (ptr)
{
byte Device=0, Format=0x50;
unsigned long Size=0x100, Addr=0;
ptr=strstr(HttpFrame, "addr=");
if (ptr) Addr=HexToULong(ptr+5);
ptr=strstr(HttpFrame, "size=");
if (ptr) Size=atol(ptr+5);
ptr=strstr(HttpFrame, "device=");
if (ptr) Device=atoi(ptr+7);
ptr=strstr(HttpFrame, "format=");
if (ptr) Format=atoi(ptr+7);
if (Format==0)
{
client.println("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n");
}
else
client.println("HTTP/1.1 200 OK\r\nContent-Type: binary/octet-stream\r\n");
byte bSequential=0;
for (long i=Addr; i<Size; i+=32)
{
unsigned char Data[32];
Samsung::ReadEeprom(Device, (bSequential) ? -1:i, Data, 32);
bSequential=1;
if (Format==0)
{
sprintf(Buffer, "%04lx: ", i); client.print(Buffer);
for (int j=0; j<32; j++)
{ sprintf(Buffer, "%02X ", Data[j]); client.print(Buffer); }
for (int j=0; j<32; j++)
{ client.write((Data[j]<=0x20 || Data[j]>0x7f) ? '.':Data[j]); }
client.println("");
client.flush();
}
else
{
for (int j=0; j<32; j++)
client.write(Data[j]);
}
}
client.stop();
return;
}
// -------------------------------------------------
// Write Eeprom
// -------------------------------------------------
ptr=strstr(HttpFrame, "/write");
char *ptrAddr=strstr(HttpFrame, "addr=");
char *ptrData=strstr(HttpFrame, "data=");
if (ptr && ptrAddr && ptrData)
{
byte Device=0, Data;
unsigned long Addr;
Addr=HexToULong(ptrAddr+5);
Data=HexToULong(ptrData+5);
ptr=strstr(HttpFrame, "device=");
if (ptr) Device=atoi(ptr+7);
Samsung::WriteEeprom(Device, Addr, &Data, 1);
client.println("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n");
Data=~Data;
Samsung::ReadEeprom(Device, Addr, &Data, 1);
sprintf(Buffer, "%02X ", Data);
client.print(Buffer);
client.stop();
return;
}
// send an error !
client.println(HtmlHeader);
client.println(F("Error !"));
delay(1);
}
client.stop();
}
// -------------------------------------------------
// Telnet Serial Console Interface
// Configure Putty with :
// - "Local Echo : Force off"
// - "Local line editing : Force off"
// -------------------------------------------------
client = TelnetServer.available();
if (client)
{
char *ptr=TelnetFrame;
int n=0;
while (client.connected() && client.available())
if (n++<sizeof(TelnetFrame)) *ptr++=client.read();
*ptr=0;
// Sends telnet buffer to Serial Console
if (n>0) Serial.write(TelnetFrame);
}
// Anything received from Serial Console ?
char *ptr=TelnetFrame;
int n=0;
while (Serial.available())
if (n++<sizeof(TelnetFrame)) *ptr++=Serial.read();
*ptr=0;
// Send it to telnet
if (n>0) TelnetServer.write(TelnetFrame);
}
// ---------------------------------------------------------------------
