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speeduino
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Verification and correction of some timing issues (Ignition)

This commit is contained in:
Josh Stewart 2013-09-14 00:21:10 +10:00
parent 6bf5e56156
commit efe280f88d
1 changed files with 8 additions and 10 deletions
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18
kartduino.ino
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@ -141,13 +141,13 @@ void loop()
{
//Check for any requets from serial
//Serial.println(toothCurrentCount);
//if (toothCurrentCount == 1) //Only check the serial buffer (And hence process serial commands) once per revolution
//{
if (Serial.available() > 0)
{
command();
}
//}
/*
Serial.print("RPM: ");
@ -163,26 +163,24 @@ void loop()
Serial.print("Tooth Number: ");
Serial.println(toothCurrentCount);
*/
//}
//delay(2500);
//Always check for sync
//Main loop runs within this clause
if (currentStatus.hasSync)
{
//Calculate the RPM based on the uS between the last 2 times tooth One was seen.
noInterrupts();
if ((micros() - toothLastToothTime) > 100000L)
if ((micros() - toothLastToothTime) > 500000L) //Check how long ago the last tooth was seen compared to now. If it was more than half a second ago then the engine is probably stopped
{
unsigned long revolutionTime = (toothOneTime - toothOneMinusOneTime); //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
noInterrupts();
unsigned long revolutionTime = (toothOneTime - toothOneMinusOneTime); //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
interrupts();
currentStatus.RPM = US_IN_MINUTE / revolutionTime;
}
else
{
//We reach here if the time between revolutions is too great. This VERY likely means the engine has stopped
//We reach here if the time between teeth is too great. This VERY likely means the engine has stopped
currentStatus.RPM = 0;
}
interrupts();
//Get the current MAP value
//currentStatus.MAP = 100; //Placeholder
currentStatus.MAP = map(analogRead(pinMAP), 0, 1023, 0, 100);
@ -199,7 +197,7 @@ void loop()
//Determine the current crank angle
int crankAngle = (toothCurrentCount - 1) * triggerToothAngle + configPage2.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is from TDC
if (crankAngle > 360) { crankAngle -= 360; } //Not sure if this is actually required
if (crankAngle > 360) { crankAngle -= 360; } //Needed due to potentially large values of triggerAngle
//Serial.print("Crank angle: "); Serial.println(crankAngle);
@ -208,7 +206,7 @@ void loop()
//Determine next firing angles
int injectorStartAngle = 355 - (currentStatus.PW / timePerDegree); //This is a bit rough, but is based on the idea that all fuel needs to be delivered before the inlet valve opens. I am using 355 as the point at which the injector MUST be closed by. See http://www.extraefi.co.uk/sequential_fuel.html for more detail
int ignitionStartAngle = 360 - ignitionAdvance; //Simple
int ignitionStartAngle = 360 - ignitionAdvance - (configPage2.dwellRun / timePerDegree); // 360 - desired advance angle - number of degrees the dwell will take
//Serial.print("Injector start angle: "); Serial.println(injectorStartAngle);