Hi.
I got this 7-Seg shield (7-Segment Shield). But i cannot get it to work with my Arduno UNO.
Anyone got any idea what could be wrong?
I tried the sample code from the page:
/***************************************************************************
Copyright 2008 Gravitech
All Rights Reserved
****************************************************************************/
/***************************************************************************
File Name: I2C_7SEG_Temperature.pde
Hardware: Arduino Diecimila with 7-SEG Shield
Description:
This program reads I2C data from digital thermometer and display it on 7-Segment
Change History:
03 February 2008, Gravitech - Created
****************************************************************************/
#include <Wire.h>
#define BAUD (9600) /* Serial baud define */
#define _7SEG (0x38) /* I2C address for 7-Segment */
#define THERM (0x49) /* I2C address for digital thermometer */
#define EEP (0x50) /* I2C address for EEPROM */
#define RED (3) /* Red color pin of RGB LED */
#define GREEN (5) /* Green color pin of RGB LED */
#define BLUE (6) /* Blue color pin of RGB LED */
#define COLD (23) /* Cold temperature, drive blue LED (23c) */
#define HOT (26) /* Hot temperature, drive red LED (27c) */
const byte NumberLookup[16] = {0x3F,0x06,0x5B,0x4F,0x66,
0x6D,0x7D,0x07,0x7F,0x6F,
0x77,0x7C,0x39,0x5E,0x79,0x71};
/* Function prototypes */
void Cal_temp (int&, byte&, byte&, bool&);
void Dis_7SEG (int, byte, byte, bool);
void Send7SEG (byte, byte);
void SerialMonitorPrint (byte, int, bool);
void UpdateRGB (byte);
/***************************************************************************
Function Name: setup
Purpose:
Initialize hardwares.
****************************************************************************/
void setup()
{
Serial.begin(BAUD);
Wire.begin(); /* Join I2C bus */
pinMode(RED, OUTPUT);
pinMode(GREEN, OUTPUT);
pinMode(BLUE, OUTPUT);
delay(500); /* Allow system to stabilize */
}
/***************************************************************************
Function Name: loop
Purpose:
Run-time forever loop.
****************************************************************************/
void loop()
{
int Decimal;
byte Temperature_H, Temperature_L, counter, counter2;
bool IsPositive;
/* Configure 7-Segment to 12mA segment output current, Dynamic mode,
and Digits 1, 2, 3 AND 4 are NOT blanked */
Wire.beginTransmission(_7SEG);
Wire.send(0);
Wire.send(B01000111);
Wire.endTransmission();
/* Setup configuration register 12-bit */
Wire.beginTransmission(THERM);
Wire.send(1);
Wire.send(B01100000);
Wire.endTransmission();
/* Setup Digital THERMometer pointer register to 0 */
Wire.beginTransmission(THERM);
Wire.send(0);
Wire.endTransmission();
/* Test 7-Segment */
for (counter=0; counter<8; counter++)
{
Wire.beginTransmission(_7SEG);
Wire.send(1);
for (counter2=0; counter2<4; counter2++)
{
Wire.send(1<<counter);
}
Wire.endTransmission();
delay (250);
}
while (1)
{
Wire.requestFrom(THERM, 2);
Temperature_H = Wire.receive();
Temperature_L = Wire.receive();
/* Calculate temperature */
Cal_temp (Decimal, Temperature_H, Temperature_L, IsPositive);
/* Display temperature on the serial monitor.
Comment out this line if you don't use serial monitor.*/
SerialMonitorPrint (Temperature_H, Decimal, IsPositive);
/* Update RGB LED.*/
UpdateRGB (Temperature_H);
/* Display temperature on the 7-Segment */
Dis_7SEG (Decimal, Temperature_H, Temperature_L, IsPositive);
delay (1000); /* Take temperature read every 1 second */
}
}
/***************************************************************************
Function Name: Cal_temp
Purpose:
Calculate temperature from raw data.
****************************************************************************/
void Cal_temp (int& Decimal, byte& High, byte& Low, bool& sign)
{
if ((High&B10000000)==0x80) /* Check for negative temperature. */
sign = 0;
else
sign = 1;
High = High & B01111111; /* Remove sign bit */
Low = Low & B11110000; /* Remove last 4 bits */
Low = Low >> 4;
Decimal = Low;
Decimal = Decimal * 625; /* Each bit = 0.0625 degree C */
if (sign == 0) /* if temperature is negative */
{
High = High ^ B01111111; /* Complement all of the bits, except the MSB */
Decimal = Decimal ^ 0xFF; /* Complement all of the bits */
}
}
/***************************************************************************
Function Name: Dis_7SEG
Purpose:
Display number on the 7-segment display.
****************************************************************************/
void Dis_7SEG (int Decimal, byte High, byte Low, bool sign)
{
byte Digit = 4; /* Number of 7-Segment digit */
byte Number; /* Temporary variable hold the number to display */
if (sign == 0) /* When the temperature is negative */
{
Send7SEG(Digit,0x40); /* Display "-" sign */
Digit--; /* Decrement number of digit */
}
if (High > 99) /* When the temperature is three digits long */
{
Number = High / 100; /* Get the hundredth digit */
Send7SEG (Digit,NumberLookup[Number]); /* Display on the 7-Segment */
High = High % 100; /* Remove the hundredth digit from the TempHi */
Digit--; /* Subtract 1 digit */
}
if (High > 9)
{
Number = High / 10; /* Get the tenth digit */
Send7SEG (Digit,NumberLookup[Number]); /* Display on the 7-Segment */
High = High % 10; /* Remove the tenth digit from the TempHi */
Digit--; /* Subtract 1 digit */
}
Number = High; /* Display the last digit */
Number = NumberLookup [Number];
if (Digit > 1) /* Display "." if it is not the last digit on 7-SEG */
{
Number = Number | B10000000;
}
Send7SEG (Digit,Number);
Digit--; /* Subtract 1 digit */
if (Digit > 0) /* Display decimal point if there is more space on 7-SEG */
{
Number = Decimal / 1000;
Send7SEG (Digit,NumberLookup[Number]);
Digit--;
}
if (Digit > 0) /* Display "c" if there is more space on 7-SEG */
{
Send7SEG (Digit,0x58);
Digit--;
}
if (Digit > 0) /* Clear the rest of the digit */
{
Send7SEG (Digit,0x00);
}
}
/***************************************************************************
Function Name: Send7SEG
Purpose:
Send I2C commands to drive 7-segment display.
****************************************************************************/
void Send7SEG (byte Digit, byte Number)
{
Wire.beginTransmission(_7SEG);
Wire.send(Digit);
Wire.send(Number);
Wire.endTransmission();
}
/***************************************************************************
Function Name: UpdateRGB
Purpose:
Update RGB LED according to define HOT and COLD temperature.
****************************************************************************/
void UpdateRGB (byte Temperature_H)
{
digitalWrite(RED, LOW);
digitalWrite(GREEN, LOW);
digitalWrite(BLUE, LOW); /* Turn off all LEDs. */
if (Temperature_H <= COLD)
{
digitalWrite(RED, HIGH);
}
else if (Temperature_H >= HOT)
{
digitalWrite(RED, HIGH);
}
else
{
digitalWrite(GREEN, HIGH);
}
}
/***************************************************************************
Function Name: SerialMonitorPrint
Purpose:
Print current read temperature to the serial monitor.
****************************************************************************/
void SerialMonitorPrint (byte Temperature_H, int Decimal, bool IsPositive)
{
Serial.print("The temperature is ");
if (!IsPositive)
{
Serial.print("-");
}
Serial.print(Temperature_H, DEC);
Serial.print(".");
Serial.print(Decimal, DEC);
Serial.print(" degree C");
Serial.print("\n\n");
}
The serial monitor just report this back:
The temperature is 0.0 degree C
Does it even work with Arduino UNO?
Appreciate some help on this one, thanks 
