forum is picky about 9500 chars so I took out some irrelevant code (methods are there).
#include <nokia_3310_lcd.h>
// Temp/humidity display using nokia 3310 LCD display shield from nuelectronics.com
// LCD Code based on source from mr. Greenbeast.
int pin = 1; // analog pin
volatile int tempref = 0;
int tempf=0; // temperature variables
int samples[8]; // variables to make a better precision
int maxi = -100,mini = 100; // to start max/min temperature
long lastTLswitch = 0;
#define TL_MAXTMP 28.0
#define TL_MINTMP 25.0
//keypad debounce parameter
#define DEBOUNCE_MAX 15
#define DEBOUNCE_ON 10
#define DEBOUNCE_OFF 3
#define NUM_KEYS 5
#define NUM_MENU_ITEM
5
// joystick number
#define UP_KEY 3
#define LEFT_KEY 0
#define CENTER_KEY 1
#define DOWN_KEY 2
#define RIGHT_KEY 4
// Pin used by Backlight, so we can turn it on and off. Pin setup in LCD init function
#define BL_PIN 7
// Pin used by Tubelight, so we can turn it on and off. Pin setup in LCD init function
#define TL_PIN 2
// menu starting points
#define MENU_X
10
// 0-83
#define MENU_Y
0
// 0-5
// adc preset value, represent top value,incl. noise & margin,that the adc reads, when a key is pressed
// set noise & margin = 30 (0.15V@5V)
int adc_key_val[5] ={
30, 150, 360, 535, 760 };
// debounce counters
byte button_count[NUM_KEYS];
// button status - pressed/released
byte button_status[NUM_KEYS];
// button on flags for user program
byte button_flag[NUM_KEYS];
// menu definition
char menu_items[NUM_MENU_ITEM][12]={
"TEMPERATURE",
"HUMIDITY",
"BACKLIGHT",
"TUBELIGHT",
"ABOUT"
};
void (*menu_funcs[NUM_MENU_ITEM])(void) = {
temperature,
humidity,
backlight,
tubelight,
about
};
char current_menu_item;
int blflag = 1; // Backlight initially ON
volatile int tlflag = 0; // Backlight initially OFF
char degree = 0x7b; // Degree symbol
Nokia_3310_lcd lcd=Nokia_3310_lcd();
int getTemp0();
void setup()
{
Serial.begin(9600); // start serial communication
// setup interrupt-driven keypad arrays
// reset button arrays
for(byte i=0; i<NUM_KEYS; i++){
button_count[i]=0;
button_status[i]=0;
button_flag[i]=0;
}
// Setup timer2 -- Prescaler/256
TCCR2A &= ~((1<<WGM21) | (1<<WGM20));
TCCR2B &= ~(1<<WGM22);
TCCR2B = (1<<CS22)|(1<<CS21);
ASSR |=(0<<AS2);
// Use normal mode
TCCR2A =0;
//Timer2 Overflow Interrupt Enable
TIMSK2 |= (0<<OCIE2A);
TCNT2=0x6; // counting starts from 6;
TIMSK2 = (1<<TOIE2);
SREG|=1<<SREG_I;
lcd.init();
lcd.clear();
//menu initialization
init_MENU();
current_menu_item = 0;
lastTLswitch = millis();
Serial.println(lastTLswitch);
}
void loop() {
byte i;
for(i=0; i<NUM_KEYS; i++) {
if(button_flag[i] !=0) {
button_flag[i]=0; // reset button flag
switch(i){
case UP_KEY:
// current item to normal display
lcd.writeString(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_NORMAL );
current_menu_item -=1;
if(current_menu_item <0) current_menu_item = NUM_MENU_ITEM -1;
// next item to highlight display
lcd.writeString(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_HIGHLIGHT );
break;
case DOWN_KEY:
// current item to normal display
lcd.writeString(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_NORMAL );
current_menu_item +=1;
if(current_menu_item >(NUM_MENU_ITEM-1)) current_menu_item = 0;
// next item to highlight display
lcd.writeString(MENU_X, MENU_Y + current_menu_item, menu_items[current_menu_item], MENU_HIGHLIGHT );
break;
case LEFT_KEY:
init_MENU();
current_menu_item = 0;
break;
case RIGHT_KEY:
lcd.clear();
(*menu_funcs[current_menu_item])();
lcd.clear();
init_MENU();
current_menu_item = 0;
break;
}
}
}
}
/* menu functions */
void init_MENU(void) {
byte i;
lcd.clear();
lcd.writeString(MENU_X, MENU_Y, menu_items[0], MENU_HIGHLIGHT );
for (i=1; i<NUM_MENU_ITEM; i++) {
lcd.writeString(MENU_X, MENU_Y+i, menu_items[i], MENU_NORMAL);
}
}
// waiting for center key press
void waitfor_OKkey() {
byte i;
byte key = 0xFF;
while (key!= CENTER_KEY){
for(i=0; i<NUM_KEYS; i++){
if(button_flag[i] !=0){
button_flag[i]=0; // reset button flag
if(i== CENTER_KEY) key=CENTER_KEY;
}
}
}
}
// Check if joystick is moved or pressed
byte checkKeypressed() {
byte key = 0xFF;
for(int i=0; i<NUM_KEYS; i++){
if(button_flag[i] !=0){
button_flag[i]=0; // reset button flag
if(i== CENTER_KEY) key=CENTER_KEY;
}
}
return key;
}
char numStr[8];
void formatNum( int num ) {
// Format a number to 2 decimal places
}
// Display temperature in big digits, humidity in small digits underneath
void temperature() {
int temp, humid;
int tempc2;
tempc2 = getTemp0();
// Display non changing text, there is a slight delay while first reading is taken
lcd.gotoXY( 62,1 );
lcd.print( tempc2 );
lcd.print( "C" );
// lcd.writeString(67, 1, "C", MENU_NORMAL);
lcd.writeString(38, 5, "OK", MENU_HIGHLIGHT );
lcd.writeString(40, 3, "%RH", MENU_NORMAL);
long lastUpdate = 0; // Force update
byte i;
byte key = 0xFF;
// Loop to display temperaure/humidity with check for key press to exit
while (key!= CENTER_KEY) {
// Update temp
if( millis() > lastUpdate + 1000) {
// Read temperature and humidity
temp = (int) tempc2 * 100;
humid = 10;
// Display temp
formatNum( temp );
lcd.writeStringBig(8, 0, numStr, MENU_NORMAL);
// Display Humidity
formatNum( humid );
lcd.writeString(10, 3, numStr, MENU_NORMAL);
lastUpdate = millis();
tempc2 = getTemp0();
// Serial.print("de temp is hier: ");
// Serial.println(tempc2);
}
key = checkKeypressed();
}
}
// Display humidity in big digits, temperature in small digits underneath
void humidity() {
int temp, humid;
// show humidity, don't have that sensor in yet.
}
// Allow backlight to be turned on and off
void backlight() {
lcd.writeString( 0, 1, "Toggle", MENU_NORMAL);
lcd.writeString( 0, 2, "Backlight", MENU_NORMAL);
if( blflag != 0 ) {
lcd.writeString( 60, 2, "Off", MENU_HIGHLIGHT);
}
else {
lcd.writeString( 60, 2, "On", MENU_HIGHLIGHT);
}
waitfor_OKkey();
if( blflag != 0 ) {
blflag=0;
digitalWrite( BL_PIN, LOW );
}
else {
blflag = 1;
digitalWrite( BL_PIN, HIGH );
}
}
// Allow tubelight to be turned on and off
void tubelight() {
lcd.writeString( 0, 1, "Toggle", MENU_NORMAL);
lcd.writeString( 0, 2, "TL Tube", MENU_NORMAL);
if( tlflag != 0 ) {
lcd.writeString( 60, 2, "Off", MENU_HIGHLIGHT);
}
else {
lcd.writeString( 60, 2, "On", MENU_HIGHLIGHT);
}
waitfor_OKkey();
if( tlflag != 0 ) {
tlflag=0;
digitalWrite( TL_PIN, LOW );
}
else {
tlflag = 1;
digitalWrite( TL_PIN, HIGH );
}
}
// The followinging are interrupt-driven keypad reading functions
// which includes DEBOUNCE ON/OFF mechanism, and continuous pressing detection
// Convert ADC value to key number
char get_key(unsigned int input) {
char k;
for (k = 0; k < NUM_KEYS; k++) {
if (input < adc_key_val[k]) {
return k;
}
}
if (k >= NUM_KEYS)
k = -1; // No valid key pressed
return k;
}
void update_adc_key() {
// ... some code
}
int getTemp0() {
int tempc = 0;
cli();
for(int i = 0;i<=15;i++){ // gets 8 samples of temperature
samples[i] = ( 5.0 * analogRead(pin) * 100.0) / 1024.0;
tempc = tempc + samples[i];
delay(50);
}
tempc = tempc/16.0; // better precision
tempf = (tempc * 9)/ 5 + 32; // converts to fahrenheit
if (tempc < (TL_MAXTMP)) {
if (tempc < TL_MINTMP) {
Serial.println(tlflag);
Serial.print("Vorige keer: ");
Serial.println(lastTLswitch);
Serial.println(millis()); // this makes the code even freeze!
if ((tlflag == 0) && ( millis() > (lastTLswitch + 2000))) {
Serial.println("Heater on...");
tlflag = 1;
digitalWrite( TL_PIN, HIGH );
lastTLswitch = millis();
}
}
} else {
// if heater is off, leave off....
if ((tlflag == 1) && ( millis() > (lastTLswitch + 2000))) {
tlflag = 0;
digitalWrite( TL_PIN, LOW );
lastTLswitch = millis();
}
}
if(tempc > maxi) {
maxi = tempc;
} // set max temperature
if(tempc < mini) {
mini = tempc;
} // set min temperature
return tempc;
sei();
}
// Timer2 interrupt routine -
// 1/(160000000/256/(256-6)) = 4ms interval
ISR(TIMER2_OVF_vect) {
TCNT2 = 6;
tempref = ( 5.0 * analogRead(pin) * 100.0) / 1024.0;
update_adc_key();
}
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forum is picky about 9500 chars so I took out some irrelevant code (methods are there).