system
1
Hello,
Just to propose a sketch to control the DS1631 Temperature Sensor.
Here it is. Hope that will help somebody in the future :
#include <Wire.h>
// PIN adresses are set to GND
#define DS1631_ADDR 0x90 >> 1
// SETUP
void setup(){
// Setup Serial connection
Serial.begin(9600);
Serial.println("");
Serial.println("-----------------------------------");
Serial.println("DS1631 test: Temp. sensor");
Serial.println("-----------------------------------");
Serial.println("");
Wire.begin(); // join I2C bus
// Stop conversion to be able to modify "Access Config" Register
Wire.beginTransmission(DS1631_ADDR);
Wire.send((int)(0x22)); // Stop conversion
Wire.endTransmission();
// Read "Access Config" regsiter
Wire.beginTransmission(DS1631_ADDR);
Wire.send((int)(0xAC)); // @AC : Acces Config
Wire.endTransmission();
Wire.requestFrom(DS1631_ADDR,1); //Reade 1 byte
Wire.available();
int AC = Wire.receive(); // receive a byte
Serial.print("Acces Config (Before): "); Serial.print(AC); Serial.println("");
// WRITE into "Access Config" Register
Wire.beginTransmission(DS1631_ADDR);
Wire.send(0xAC); // @AC : Acces Config
Wire.send(0x0C); // Continuous conversion & 12 bits resolution
Wire.endTransmission();
// READ "Access Config" register
Wire.beginTransmission(DS1631_ADDR);
Wire.send((int)(0xAC)); // @AC : Acces Config
Wire.endTransmission();
Wire.requestFrom(DS1631_ADDR,1);
Wire.available();
AC = Wire.receive();
Serial.print("Acces Config (AFTER): "); Serial.print(AC); Serial.println("");
// START conversion to get T°
Wire.beginTransmission(DS1631_ADDR);
Wire.send((int)(0x51)); // Start Conversion
Wire.endTransmission();
}
// Main Loop
void loop(){
//READ T°
Wire.beginTransmission(DS1631_ADDR);
Wire.send((int)(0xAA)); // @AA : Temperature
Wire.endTransmission();
Wire.requestFrom(DS1631_ADDR,2); // READ 2 bytes
Wire.available(); // 1st byte
int Th = Wire.receive(); // receive a byte
Wire.available(); // 2nd byte
int Tl = Wire.receive(); // receive a byte
// T° processing
if(Th>=0x80) //if sign bit is set, then temp is negative
Th = Th - 256;
int T_dec=(10*(100*(Tl/16)))/16; // decimal part of the T°
// Display T° on "Serial Monitor"
Serial.print("Temperature : ");
Serial.print(Th); Serial.print(".");
if (T_dec<10) Serial.print("0");
if (T_dec<100) Serial.print("0");
Serial.print(T_dec); Serial.print(" degC / ");
Serial.print("Th register: "); Serial.print(Th); Serial.print(" / ");
Serial.print("Tl register: "); Serial.print(Tl); Serial.println("");
// Wait 1s before restart
delay(1000);
}
Have fun 
system
2
Thanks.
I made my first tests with ds1631 as a Object
Is it for somebody usable???
iTom
ds1631.cpp
/*
Ds1631.cpp - Library for High-Precision Digital Thermometer and Thermostat
Created by ITom Ibach
Version 20090915
http://datasheets.maxim-ic.com/en/ds/DS1631-DS1731.pdf
*/
#include <Wire.h>
#include <Ds1631.h>
// Initialize Class Variables //////////////////////////////////////////////////
int _Addr;
uint8_t Th;
uint8_t Tl;
// Constructors ////////////////////////////////////////////////////////////////
Ds1631::Ds1631(int Addr){
_Addr=Addr + 72; // Ground Addr 72 for Ds1631
}
// Public Methods //////////////////////////////////////////////////////////////
void Ds1631::stopConversion(){
Wire.beginTransmission(_Addr);
Wire.send(0x22); // Stop conversion
Wire.endTransmission();
}
void Ds1631::startConversion(){
Wire.beginTransmission(_Addr);
Wire.send(0x51); // Start conversion
Wire.endTransmission();
}
void Ds1631::writeConfig(uint8_t _data){
stopConversion();
Wire.beginTransmission(_Addr);
Wire.send(0xAC); // @AC : Acces Config
Wire.send(_data);
Wire.endTransmission();
startConversion();
}
uint8_t Ds1631::readConfig(){
uint8_t _data;
Wire.beginTransmission(_Addr);
Wire.send(0xAC); // @AC : Acces Config
Wire.endTransmission();
Wire.requestFrom(_Addr, 1);
if(Wire.available()) {
_data = Wire.receive();
}
return _data;
}
void Ds1631::readT(){
Wire.beginTransmission(_Addr);
Wire.send(0xAA); // @AA : Temperature
Wire.endTransmission();
Wire.requestFrom(_Addr,2); // READ 2 bytes
Wire.available(); // 1st byte
Th = Wire.receive(); // receive a byte
Wire.available(); // 2nd byte
Tl = Wire.receive(); // receive a byte
}
float Ds1631::readTempF(){
int T_dec;
double T;
readT();
// T° processing
Tl = Tl>>4;
if(Th>=0x80){ //if sign bit is set, then temp is negative
Th = Th - 256;
}
T = (float) Th + (float) Tl*0.0625;
return T;
}
int32_t Ds1631::readTempD(){ // 1/16°C = 1 Bit 0.0625°C
int T_dec;
int32_t T;
readT();
T=((int32_t)Th << 8) + Tl ;
// T° processing
if(T >= 0x8000){ //if sign bit is set, then temp is negative
T = T - 0xFFFF;
}
T = T >>4;
return T;
}
bool Ds1631::conversionDone(){ // if Conversion Done = Boolean = True
uint8_t _data = readConfig();
if ((_data | 127)==255)
return true;
else
return false;
}
ds1631.h
/*
Ds1631.h - Lirbray for Ds1631 Expander
Created by ITom Ibach
Version 20090915
*/
#ifndef Ds1631_h
#define Ds1631_h
//#include <WProgram.h>
#include <inttypes.h>
class Ds1631
{
public:
Ds1631(int);
void stopConversion();
void startConversion();
void writeConfig(uint8_t);
uint8_t readConfig();
float readTempF(); //Floatinpoint z.B. 24.125
int32_t readTempD(); //Long * 1/16 = °C
bool conversionDone();
private:
void readT();
int _Addr;
uint8_t Th;
uint8_t Tl;
};
#endif
ds1631_Example_ease.pde
/*
ds1631_Example_ease.pde - Easy Example for High-Precision Digital Thermometer
Created by ITom Ibach
Version 20090915
http://datasheets.maxim-ic.com/en/ds/DS1631-DS1731.pdf
*/
#include <Wire.h>
#include <ds1631.h>
Ds1631 Temp1(0); //addr=0 = all PIN adresses are set to GND
// SETUP
void setup(){
int AC;
// Setup Serial connection
Serial.begin(19200);
Serial.println("");
Serial.println("-----------------------------------");
Serial.println("DS1631 test: Temp. sensor");
Serial.println("-----------------------------------");
Serial.println("");
Wire.begin(); // join I2C bus
// WRITE into "Access Config" Register
Temp1.writeConfig(0x0C); // 0C=Continuous conversion & 12 bits resolution = +-0.0625°C
// 08=Continuous conversion & 11 bits resolution = +-0.125°C
// 04=Continuous conversion & 10 bits resolution = +-0.25°
// 00=Continuous conversion & 9 bits resolution = +-0.5°C
// READ "Access Config" register
AC = Temp1.readConfig();
Serial.print("Acces Config 1 (AFTER): "); Serial.print(AC,HEX); Serial.println("");
}
// Main Loop
void loop(){
// Display T° on "Serial Monitor"
Serial.print("Temperature 1 : "); Serial.print(Temp1.readTempF()); Serial.println(" degC ");
delay(500);
}
ds1631_Example_LCD.pde
/*
ds1631_Example_LCD.pde - Example for High-Precision Digital Thermometer with LCD
The Idee was to hold the Celler as cool als posible
Created by ITom Ibach
Version 20090915
http://datasheets.maxim-ic.com/en/ds/DS1631-DS1731.pdf
*/
// include the library code:
#include <LiquidCrystal.h>
#include <Wire.h>
#include <ds1631.h>
// these constants won't change. But you can change the size of
// your LCD using them:
const int numRows = 2;
const int numCols = 16;
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
Ds1631 Temp1(0); //addr=0
Ds1631 Temp2(1); //addr=1
void setup() {
int AC;
Serial.begin(19200);
Serial.println("");
Serial.println("-----------------------------------");
Serial.println("DS1631 test: Temp. sensor");
Serial.println("-----------------------------------");
Serial.println("");
Wire.begin(); // join I2C bus
// set up the LCD's number of rows and columns:
lcd.begin(numRows, numCols);
// WRITE into "Access Config" Register
Temp1.writeConfig(0x04); // Continuous conversion & 10 bits resolution
Temp2.writeConfig(0x04); // Continuous conversion & 10 bits resolution
// READ "Access Config" register
AC = Temp1.readConfig();
Serial.print("Acces Config 1 (AFTER): "); Serial.print(AC,HEX); Serial.println(' ');
AC = Temp2.readConfig();
Serial.print("Acces Config 2 (AFTER): "); Serial.print(AC,HEX); Serial.println(' ');
// START conversion to get T°
Temp1.startConversion();
Temp2.startConversion();
}
void loop() {
float TempInnen=Temp1.readTempF();
float TempAussen=Temp2.readTempF();
int hysterese=2;
float diff=TempAussen-TempInnen;
float SollWert=6; // The best Temprature for the cellar
boolean heizen;
lcd.setCursor(0,0);
lcd.print('A');lcd.print(':');
lcd.print(TempAussen);
lcd.print(' ');
lcd.setCursor(9,0);
lcd.print('D');lcd.print(':');
lcd.print(diff); lcd.print(' ');
//Serial.print("Temperature 1 : "); Serial.print(Temp1.readTempF()); Serial.println(" degC ");
lcd.setCursor(0,1);
lcd.print('I'); lcd.print(':');
lcd.print(TempInnen);
lcd.print(' ');
//Serial.print("Temperature 2 : "); Serial.print(Temp2.readTempF()); Serial.println(" degC ");
lcd.setCursor(12,1);
if (TempInnen <= SollWert){
heizen=true;
lcd.print('H'); lcd.print('=');
if (diff >= hysterese) {
lcd.print('1');
}
else {
lcd.print('0');
}
}
else {
heizen=false;
lcd.print('K'); lcd.print('=');
diff=0-diff;
if (diff >= hysterese) {
lcd.print('1');
}
else {
lcd.print('0');
}
}
delay(200);
}