int main(void)
{
init_lcd();
writecommand(0x01);
updateScreen();
DDRD |= (1 << PD2);//output for green LED
DDRD |= (1 << PD3);//output for red LED
//button pullup resistors:
PORTB |= (1 << PB3) | (1 << PB4);
//rotary encoder initializations:
initialize_rotary();
sei();
PORTC |= (1 << PC4) | (1 << PC5);//i2c pullup resistors
//enable line
PORTC |= (1 << PC3);
DDRC |= (1 << PC3); //set as output
//DS1631
ds1631_init();
ds1631_conv();
unsigned char temp[2];
//serial communication
init_serial();
while (1) {
PORTC &= ~(1 << PC3);//set enable to 0
ds1631_temp(temp);
int tempCelsius = temp[0];
//convert from celsius to fahrenheit:
if(temp[1] == 0){
tempF = (tempCelsius*9)/5 + 32;
}
else{
tempF = tempCelsius * 10 + 5;
tempF = (tempF*9)/5 + 320;
tempF /= 10;
}
if(oldTempF != tempF){//if temperature changes, update + transmit data
//update temp
updateTop();
char temp[5];
snprintf(temp, 5, "%d", tempF);
transmitData(temp, &tempF);
}
oldTempF = tempF;//update old temp
if((PINB & (1 << PB3)) == 0){//if high button is pressed
buttonState = 1;//high
}
if((PINB & (1 << PB4)) == 0){//if low button is pressed
buttonState = 0;//low
}
if(bufferValidFlag == 1){//valid data received
//convert to int stored inside remoteVal
int hundreds = (receivedDataBuffer[1]-0x30)*100;
int tens = (receivedDataBuffer[2]-0x30)*10;
int ones = receivedDataBuffer[3]-0x30;
remoteVal = hundreds + tens + ones;
if(receivedDataBuffer[0] == '-'){
remoteVal = 0 - remoteVal;
}
updateTop();
bufferValidFlag = 0;//reset
}
if(change == 1){
updateScreen();
change = 0;//reset
}
updateLED();
}
return 0; /* never reached */
}
int main() {
int oldl = 1000, oldh = 1000, oldt = 1000;//, oldr = 1000;
unsigned char out[4];
unsigned char rec[5];
unsigned char temp[2];
moduleinit();
while (1) {
//receive and convert temperature
ds1631_temp(temp);
float c = temp[0];
if (temp[1]) {
c += 0.5;
}
float f = (9*c)/5;
int x = f +32;
//unsigned char rmt = rx_char();
if (low != oldl) {
moveto(0x45);
stringout(" "); //clear previous number
moveto(0x45);
sprintf(out, "%2d", low);
stringout(out);
oldl = low;
}
if (high != oldh) {
moveto(0x4d);
stringout(" "); //clear previous number
moveto(0x4d);
sprintf(out, "%2d", high);
stringout(out);
oldh = high;
}
if (x != oldt) {
moveto(5);
stringout(" ");
moveto(5);
itoa(x, out, 10);
stringout(out);
oldt = x;
//send temperature
if (x > 0) {
tx_char('+');
}
else if (x < 0) {
tx_char('-');
}
//if 3 digits
if (out[2] == 0) {
tx_char('0');
_delay_ms(5);
tx_char(out[0]);
_delay_ms(5);
tx_char(out[1]);
}
//if 2 digits
else {
tx_char(out[0]);
_delay_ms(5);
tx_char(out[1]);
_delay_ms(5);
tx_char(out[2]);
}
}
//receive temperature
if (UCSR0A & (1 << RXC0)) {
// character has been received
if (rx_char() == '+') {
rec[0] = rx_char(); //100's digit
if (rec[0] == '0') { //if 100's digit is 0
rec[0] = rx_char();
rec[1] = rx_char();
rec[2] = 0;
}
else { //else reset rec[0] to 10's digit
rec[1] = rx_char();
rec[2] = rx_char();
rec[3] = 0;
}
}
else if (rx_char() == '-') {
rec[0] = '-';
rec[1] = rx_char();
if (rec[1] == '0') { //if 100's digit is 0
rec[1] = rx_char();
rec[2] = rx_char();
rec[3] = 0;
}
else { //else reset rec[0] to 10's digit
rec[2] = rx_char();
rec[3] = rx_char();
rec[4] = 0;
}
}
moveto(13);
stringout(" ");
moveto(13);
stringout(rec);
}
if (x < low) {
PORTD |= (1 << PD3);
}
else {
PORTD &= ~(1 << PD3);
}
if (x > high) {
PORTD |= (1 << PD2);
}
else {
PORTD &= ~(1 << PD2);
}
moveto(0x50); //move cursor off of screen
}
return 0;
}