90 lines
3.3 KiB
Arduino
90 lines
3.3 KiB
Arduino
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/*
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Speeduino - Simple engine management for the Arduino Mega 2560 platform
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Copyright (C) Josh Stewart
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A full copy of the license may be found in the projects root directory
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*/
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void instanteneousMAPReading()
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{
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//Instantaneous MAP readings
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int tempReading;
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tempReading = analogRead(pinMAP);
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tempReading = analogRead(pinMAP);
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//Error checking
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if(tempReading >= VALID_MAP_MAX || tempReading <= VALID_MAP_MIN) { mapErrorCount += 1; }
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else { currentStatus.mapADC = tempReading; mapErrorCount = 0; }
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currentStatus.MAP = map(currentStatus.mapADC, 0, 1023, configPage1.mapMin, configPage1.mapMax); //Get the current MAP value
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}
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void readMAP()
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{
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//MAP Sampling system
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int tempReading;
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switch(configPage1.mapSample)
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{
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case 0:
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//Instantaneous MAP readings
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instanteneousMAPReading();
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break;
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case 1:
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//Average of a cycle
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if (currentStatus.RPM < 1) { instanteneousMAPReading(); return; } //If the engine isn't running, fall back to instantaneous reads
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if( (MAPcurRev == startRevolutions) || (MAPcurRev == startRevolutions+1) ) //2 revolutions are looked at for 4 stroke. 2 stroke not currently catered for.
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{
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tempReading = analogRead(pinMAP);
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tempReading = analogRead(pinMAP);
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//Error check
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if(tempReading < VALID_MAP_MAX && tempReading > VALID_MAP_MIN)
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{
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MAPrunningValue = MAPrunningValue + tempReading; //Add the current reading onto the total
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MAPcount++;
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}
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else { mapErrorCount += 1; }
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}
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else
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{
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//Reaching here means that the last cylce has completed and the MAP value should be calculated
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currentStatus.mapADC = ldiv(MAPrunningValue, MAPcount).quot;
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currentStatus.MAP = map(currentStatus.mapADC, 0, 1023, configPage1.mapMin, configPage1.mapMax); //Get the current MAP value
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MAPcurRev = startRevolutions; //Reset the current rev count
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MAPrunningValue = 0;
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MAPcount = 0;
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}
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break;
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case 2:
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//Minimum reading in a cycle
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if (currentStatus.RPM < 1) { instanteneousMAPReading(); return; } //If the engine isn't running, fall back to instantaneous reads
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if( (MAPcurRev == startRevolutions) || (MAPcurRev == startRevolutions+1) ) //2 revolutions are looked at for 4 stroke. 2 stroke not currently catered for.
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{
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tempReading = analogRead(pinMAP);
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tempReading = analogRead(pinMAP);
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//Error check
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if(tempReading < VALID_MAP_MAX && tempReading > VALID_MAP_MIN)
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{
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if( tempReading < MAPrunningValue) { MAPrunningValue = tempReading; } //Check whether the current reading is lower than the running minimum
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}
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else { mapErrorCount += 1; }
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}
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else
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{
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//Reaching here means that the last cylce has completed and the MAP value should be calculated
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currentStatus.mapADC = MAPrunningValue;
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currentStatus.MAP = map(currentStatus.mapADC, 0, 1023, configPage1.mapMin, configPage1.mapMax); //Get the current MAP value
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MAPcurRev = startRevolutions; //Reset the current rev count
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MAPrunningValue = 1023; //Reset the latest value so the next reading will always be lower
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}
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break;
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}
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}
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