110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
#ifndef SENSORS_H
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#define SENSORS_H
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#include "Arduino.h"
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// The following are alpha values for the ADC filters.
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// Their values are from 0 to 255 with 0 being no filtering and 255 being maximum
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#define ADCFILTER_TPS 128
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#define ADCFILTER_CLT 180
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#define ADCFILTER_IAT 180
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#define ADCFILTER_O2 128
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#define ADCFILTER_BAT 128
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#define ADCFILTER_MAP 20 //This is only used on Instantaneous MAP readings and is intentionally very weak to allow for faster response
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#define ADCFILTER_BARO 64
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#define BARO_MIN 87
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#define BARO_MAX 108
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/*
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#if defined(CORE_AVR)
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#define ANALOG_ISR
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#endif
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*/
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volatile byte flexCounter = 0;
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volatile int AnChannel[15];
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unsigned long MAPrunningValue; //Used for tracking either the total of all MAP readings in this cycle (Event average) or the lowest value detected in this cycle (event minimum)
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unsigned int MAPcount; //Number of samples taken in the current MAP cycle
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uint16_t MAPcurRev; //Tracks which revolution we're sampling on
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/*
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* Simple low pass IIR filter macro for the analog inputs
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* This is effectively implementing the smooth filter from http://playground.arduino.cc/Main/Smooth
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* But removes the use of floats and uses 8 bits of fixed precision.
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*/
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#define ADC_FILTER(input, alpha, prior) (((long)input * (256 - alpha) + ((long)prior * alpha))) >> 8
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static inline void instanteneousMAPReading() __attribute__((always_inline));
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static inline void readMAP() __attribute__((always_inline));
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void readTPS();
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void flexPulse();
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#if defined(ANALOG_ISR)
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//Analog ISR interrupt routine
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/*
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ISR(ADC_vect)
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{
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byte nChannel;
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int result = ADCL | (ADCH << 8);
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//ADCSRA = 0x6E; // ADC disabled by clearing bit 7(ADEN)
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//BIT_CLEAR(ADCSRA, ADIE);
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nChannel = ADMUX & 0x07;
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#if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
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if (nChannel==7) { ADMUX = 0x40; }
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#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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if(ADCSRB & 0x08) { nChannel += 8; } //8 to 15
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if(nChannel == 15)
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{
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ADMUX = 0x40; //channel 0
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ADCSRB = 0x00; //clear MUX5 bit
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}
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else if (nChannel == 7) //channel 7
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{
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ADMUX = 0x40;
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ADCSRB = 0x08; //Set MUX5 bit
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}
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#endif
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else { ADMUX++; }
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AnChannel[nChannel-1] = result;
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//BIT_SET(ADCSRA, ADIE);
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//ADCSRA = 0xEE; // ADC Interrupt Flag enabled
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}
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*/
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ISR(ADC_vect)
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{
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byte nChannel = ADMUX & 0x07;
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int result = ADCL | (ADCH << 8);
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BIT_CLEAR(ADCSRA, ADEN); //Disable ADC for Changing Channel (see chapter 26.5 of datasheet)
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#if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
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if (nChannel==7) { ADMUX = 0x40; }
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#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
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if( (ADCSRB & 0x08) > 0) { nChannel += 8; } //8 to 15
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if(nChannel == 15)
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{
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ADMUX = 0x40; //channel 0
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ADCSRB = 0x00; //clear MUX5 bit
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}
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else if (nChannel == 7) //channel 7
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{
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ADMUX = 0x40;
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ADCSRB = 0x08; //Set MUX5 bit
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}
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#endif
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else { ADMUX++; }
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AnChannel[nChannel] = result;
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BIT_SET(ADCSRA, ADEN); //Enable ADC
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}
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#endif
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#endif // SENSORS_H
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