getTemperatureInternal() for tiny 84 #1
Description
Original GetTemperature fct is only for atmega 328 ...
int8_t` getTemperatureInternal() {
//reads internal internal temp with 1V1 reference
#if defined (__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) //
ADMUX = (1<<REFS1) | (1<<MUX5)| (1<<MUX1); //turn 1.1V reference and select ADC8 For ATtiny84
#elif (__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)// -40°=230lsb +25°=300lsb +85=370lsb
ADMUX = (1<<REFS1) | (1<<MUX3)| (1<<MUX2)| (1<<MUX1)| (1<<MUX0); //turn 1.1V reference and select ADC4 For ATtiny85
#elif defined(__AVR_ATmega1284P__)
// For ATmega1284 not working
#else // -45°=242mV +25=314mV +85°=380mV
ADMUX = (1<<REFS0) |(1<<REFS1) | (1<<MUX3); //turn 1.1V reference and select ADC8 for atmega 328p
#endif
delay(5); //wait for internal reference to settle
// start the conversion
ADCSRA |= bit(ADSC);
//sbi(ADCSRA, ADSC);
// ADSC is cleared when the conversion finishes
while (ADCSRA & bit(ADSC));
//while (bit_is_set(ADCSRA, ADSC));
uint8_t low = ADCL;
uint8_t high = ADCH;
//discard first reading
ADCSRA |= bit(ADSC);
while (ADCSRA & bit(ADSC));
low = ADCL;
high = ADCH;
int a = (high << 8) | low;
return a - 270; //return temperature in C , x1100/1024=1,074 ....
}