Hi i need help with my webserver and 1wire

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi.

This code is part of a demonstration how to get temperature on the ENC28J60 SPI ethernet controller web server. It only get data from one sensor, but what if i would like to get from 3 sensor on the same wire, can someone help me to implement that and return it to the web server.
here is the original code:
at the bottom he return just from one sensor....

/*

  • Arduino OneWire functions
    */

#define TEMP_PIN 3
void OneWireReset(int Pin);
void OneWireOutByte(int Pin, byte d);
byte OneWireInByte(int Pin);

// Initialise OneWire
void initOneWire() {
// Temp Pin input
digitalWrite(TEMP_PIN, LOW);
pinMode(TEMP_PIN, INPUT); // sets the digital pin as input (logic 1)
}

void OneWireReset(int Pin) // reset. Should improve to act as a presence pulse
{
digitalWrite(Pin, LOW);
pinMode(Pin, OUTPUT); // bring low for 500 us
delayMicroseconds(500);
pinMode(Pin, INPUT);
delayMicroseconds(500);
}

void OneWireOutByte(int Pin, byte d) // output byte d (least sig bit first).
{
byte n;

for(n=8; n!=0; n--)
{
if ((d & 0x01) == 1) // test least sig bit
{
digitalWrite(Pin, LOW);
pinMode(Pin, OUTPUT);
delayMicroseconds(5);
pinMode(Pin, INPUT);
delayMicroseconds(60);
}
else
{
digitalWrite(Pin, LOW);
pinMode(Pin, OUTPUT);
delayMicroseconds(60);
pinMode(Pin, INPUT);
}

d=d>>1; // now the next bit is in the least sig bit position.
}
}

byte OneWireInByte(int Pin) // read byte, least sig byte first
{
byte d, n, b;

for (n=0; n<8; n++)
{
digitalWrite(Pin, LOW);
pinMode(Pin, OUTPUT);
delayMicroseconds(5);
pinMode(Pin, INPUT);
delayMicroseconds(5);
b = digitalRead(Pin);
delayMicroseconds(50);
d = (d >> 1) | (b<<7); // shift d to right and insert b in most sig bit position
}
return(d);
}

// Return temp * 100, need to /100 for main part and % 100 for decimal part
int readOneWireTemp() {
int HighByte, LowByte, TReading, SignBit, Tc_100, Whole, Fract;
int temp;

OneWireReset(TEMP_PIN);
OneWireOutByte(TEMP_PIN, 0xcc);
OneWireOutByte(TEMP_PIN, 0x44); // perform temperature conversion, strong pullup for one sec

OneWireReset(TEMP_PIN);
OneWireOutByte(TEMP_PIN, 0xcc);
OneWireOutByte(TEMP_PIN, 0xbe);

LowByte = OneWireInByte(TEMP_PIN);
HighByte = OneWireInByte(TEMP_PIN);
TReading = (HighByte << 8) + LowByte;
SignBit = TReading & 0x8000; // test most sig bit
if (SignBit) // negative
{
TReading = (TReading ^ 0xffff) + 1; // 2's comp
}
Tc_100 = (6 * TReading) + TReading / 4; // multiply by (100 * 0.0625) or 6.25

Whole = Tc_100 / 100; // separate off the whole and fractional portions
Fract = Tc_100 % 100;

return Tc_100;
}