////////////////////////////////////////////////////////////////////////////////
// Name: RO-052 Temperature sensor IR MLX90614 //
// http://robotigs.com/robotigs/includes/parts_header.php?idpart=256 //
// Platform: Arduino Uno Rev3 //
// Created by: HARB rboek2@gmail.com september 2017 GPL copyrights //
// Thanks to: https://github.com/wilson-elechouse //
// https://github.com/elechouse/MLX90614/tree/master/examples/MLX90614 //
// No pullup resistors needed if internal pullups are set //
////////////////////////////////////////////////////////////////////////////////
// SET PRECOMPILER OPTIONS *****************************************************
// Initialse conditional compiling, uncomment to include, comment to exclude ---
// Do comment for runtime versions
#define RS232 //Uncomment to include Serial Monitor sections
// #ifdef RS232 //Only include these lines if the variable has been defined
//Define precompiler variables -------------------------------------------------
// Define PINS -----------------------------------------------------------------
//Define the needed header files for the precompiler, no charge if not used ----
#include <i2cmaster.h> //Thanks to: https://github.com/wilson-elechouse
//DEFINE VARIABLES -------------------------------------------------------------
//This converts high and low bytes together and processes temperature
//MSB is a error bit and is ignored for temps
//0.02 degrees per LSB (measurement resolution of the MLX90614)
double tempFactor = 0.02;
double tempData = 0x0000; //Zero out the data
int frac; //Data past the decimal point
bool ledBinVal = LOW; //Choose HIGH=on or LOW=off for on-board LED
int dev = 0x5A<<1; //Set dewvice number
int data_low = 0; //Set read value low to zero
int data_high = 0; //Set read value high to zero
int pec = 0; //Set temporarily variable to zero
//END OF PRECOMPILER OPTIONS ---------------------------------------------------
void setup() { //Setup runs once ***********************************************
disable_jtag(); //Disable jtag to free port C, enabled by default
Serial.begin(9600); //Nothing more needed for the Serial Monitor to function
pinMode(LED_BUILTIN, OUTPUT); //Arduino boards contain an onboard LED
digitalWrite(LED_BUILTIN, ledBinVal);//Onboard LED switched to default setting
i2c_init(); //Initialise the i2c bus
PORTC = (1 << PORTC4) | (1 << PORTC5);//Enable pullups only if not in hardware
}//--(end setup )---------------------------------------------------------------
void loop() { //KEEP ON RUNNING THIS LOOP FOREVER ******************************
i2c_start_wait(dev+I2C_WRITE); //Start I2C bus and become the master
i2c_write(0x07); //Address the tempertature sensor
i2c_rep_start(dev+I2C_READ); //Restart the bus and prep[air to read
data_low = i2c_readAck(); //Read 1 byte and then send ack
data_high = i2c_readAck(); //Read 1 byte and then send ack
pec = i2c_readNak(); //Send Nack to stop communication with the sensor
i2c_stop(); //Free the I2C bus for other applications
// This masks off the error bit of the high byte,
// then moves it left 8 bits and adds the low byte.
tempData = (double)(((data_high & 0x007F) << 8) + data_low);
tempData = (tempData * tempFactor)-0.01;
float celcius = tempData - 273.15;
float fahrenheit = (celcius*1.8) + 32;
Serial.print("Celcius:");
Serial.print(celcius);
Serial.print(" Fahrenheit:");
Serial.println(fahrenheit);
toggle_ledBin(); //Toggles the default on-board LED on or off
delay(1000); // wait a second before printing again
} //End of void loop() //KEEP ON RUNNING THIS LOOP FOREVER
void toggle_ledBin(void) { //Toggles the default on-board LED on or off ********
ledBinVal = !ledBinVal; //Toggle value
digitalWrite(LED_BUILTIN, ledBinVal); //Set Arduino boards onboard LED
} //Exit toggle_ledBin ---------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
// PIN ALLOCATIONS TABLE ARDUINO UNO //
// Board -Atmel- PIN - IDE - Function - Connection ALT //
// //
// CONNECTIONS RAILS TOP LEFT: DIGITAL PWM<~> ******************************* //
// SCL - 28 - PC5 -19/A5- ADC5/SCL/PCINT13 - MLX90614 IR temp sensor TWI //
// SDA - 27 - PC4 -18/A4- ADC4/SDA/PCINT12 - MLX90614 IR temp sensor TWI //
// AREF - 21 - REF - - AREF - //
// GND - 22 - GND - - GND - //
// 13 - 19 - PB5 - 13 - SCK/PCINT5 - LED_BUILTIN Arduino SPI //
// 12 - 18 - PB4 - 12 - MISO/PCINT4 - SPI //
// ~11 - 17 - PB3 - 11 - MOSI/OC2A/PCINT3 - PWM //
// ~10 - 16 - PB2 - 10 - SS/OC1B/PCINT2 - PWM //
// ~9 - 15 - PB1 - 9 - OC1A/PCINT1 - PWM //
// 8 - 14 - PB0 - 8 - PCINT0/CLK0/ICP1 - DIO //
// //
// CONNECTIONS RAILS TOP RIGHT: DIGITAL PWM<~> ****************************** //
// 7 - 13 - PD7 - 7 - PCINT23/AIN1 - DIO //
// ~6 - 12 - PD6 - 6 - PCINT22/OCA0/AIN0 - PWM //
// ~5 - 11 - PD5 - 5 - PCINT21/OC0B/T1 - PWM //
// ~4 - 6 - PD4 - 4 - PCINT20/XCK/T0 - PWM //
// ~3 - 5 - PD3 - 3 - PCINT19/OC2B/INT1 - INT //
// ~2 - 4 - PD2 - 2 - PCINT18/INT0 - INT //
// TX->1 - 3 - PD1 - 1 - PCINT17/TXD - Serial monitor TXD //
// RX<-0 - 2 - PD0 - 0 - PCINT16/RCD - Serial Monitor RCD //
// //
// CONNECTIONS RAILS BOTTOM LEFT: POWER ************************************* //
// 5V - 7 - VCC - - VCC - VCC //
// RES - 1 - RES - - PCINT14/RESET - RES //
// 3.3V - - - - - //
// 5V - - - - - Connected to breadboard //
// GND - - - - - Connected to breadboard //
// GND - - - - - //
// Vin - - - - - //
// //
// CONNECTIONS RAILS BOTTOM RIGHT: ANALOG IN ******************************** //
// A0 - 23 - PC0 -A0/14- ADC0/PCINT8 - ADC //
// A1 - 24 - PC1 -A1/15- ADC1/PCINT9 - ADC //
// A2 - 25 - PC2 -A2/16- ADC2/PCINT10 - ADC //
// A3 - 26 - PC3 -A3/17- ADC3/PCINT12 - ADC //
// A4 - 27 - PC4 -A4/18- ADC4/SDA/PCINT12 - TWI //
// A5 - 28 - PC5 -A5/19- ADC5/SCL/PCINT13 - TWI //
////////////////////////////////////////////////////////////////////////////////
// EEPROM MEMORY MAP in 8 bits bytes: //
// Start End Number Description //
// 0000 0000 1 Never use this memory location to be AVR compatible //
////////////////////////////////////////////////////////////////////////////////
//345678911234567892123456789312345678941234567895123456789612345678971234567898
////////////////////////////////////////////////////////////////////////////////
// FUSES (can always be altered by using the STK500) //
// On-Chip Debug Enabled: off (OCDEN=0) //
// JTAG Interface Enabled: off (JTAGEN=0) //
// Preserve EEPROM mem through the Chip Erase cycle: On (EESAVE = 0) //
// Boot Flash section = 2048 words, Boot startaddr=$3800 (BOOTSZ=00) //
// Boot Reset vector Enabled, default address=$0000 (BOOTSTR=0) //
// CKOPT fuse (operation dependent of CKSEL fuses (CKOPT=0) //
// Brown-out detection level at VCC=2,7V; (BODLEVEL=1) //
// Ext. Cr/Res High Freq.; Start-up time: 16K CK + 64 ms (CKSEL=1111 SUT=11) //
// LOCKBITS (are dangerous to change, since they cannot be reset) //
// Mode 1: No memory lock features enabled //
// Application Protect Mode 1: No lock on SPM and LPM in Application Section //
// Boot Loader Protect Mode 1: No lock on SPM and LPM in Boot Loader Section //
////////////////////////////////////////////////////////////////////////////////
void disable_jtag(void) { //Disable jtag to free port C, enabled by default ****
#if defined(JTD) //Not all AVR controller include jtag
MCUCR |= ( 1 << JTD ); //Write twice to disable
MCUCR |= ( 1 << JTD ); //So stutter once
#endif //End of conditional compiling
} //Exit jtag_disable ----------------------------------------------------------