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Improve calculation speed of boost control

This commit is contained in:
Josh Stewart 2017-02-11 22:33:07 +13:00
parent b8fec27bc0
commit bec06bca3a
3 changed files with 18 additions and 12 deletions
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1
speeduino/auxiliaries.h
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@ -16,6 +16,7 @@ unsigned int boost_pwm_max_count; //Used for variable PWM frequency
volatile unsigned int boost_pwm_cur_value;
long boost_pwm_target_value;
long boost_cl_target_boost;
byte boostCounter;
volatile bool vvt_pwm_state;
unsigned int vvt_pwm_max_count; //Used for variable PWM frequency

23
speeduino/auxiliaries.ino
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@ -22,7 +22,7 @@ void fanControl()
{
int onTemp = (int)configPage4.fanSP - CALIBRATION_TEMPERATURE_OFFSET;
int offTemp = onTemp - configPage4.fanHyster;
if (!currentStatus.fanOn && currentStatus.coolant >= onTemp) { digitalWrite(pinFan,fanHIGH); currentStatus.fanOn = true; }
if (currentStatus.fanOn && currentStatus.coolant <= offTemp) { digitalWrite(pinFan, fanLOW); currentStatus.fanOn = false; }
}
@ -35,13 +35,13 @@ void initialiseAuxPWM()
TCNT1 = 0; //Reset Timer Count
TIFR1 = 0x00; //Timer1 INT Flag Reg: Clear Timer Overflow Flag
TCCR1A = 0x00; //Timer1 Control Reg A: Wave Gen Mode normal (Simply counts up from 0 to 65535 (16-bit int)
TCCR1B = (1 << CS12); //Timer1 Control Reg B: Timer Prescaler set to 256. 1 tick = 16uS. Refer to http://www.instructables.com/files/orig/F3T/TIKL/H3WSA4V7/F3TTIKLH3WSA4V7.jpg
TCCR1B = (1 << CS12); //Timer1 Control Reg B: Timer Prescaler set to 256. 1 tick = 16uS. Refer to http://www.instructables.com/files/orig/F3T/TIKL/H3WSA4V7/F3TTIKLH3WSA4V7.jpg
boost_pin_port = portOutputRegister(digitalPinToPort(pinBoost));
boost_pin_mask = digitalPinToBitMask(pinBoost);
vvt_pin_port = portOutputRegister(digitalPinToPort(pinVVT_1));
vvt_pin_mask = digitalPinToBitMask(pinVVT_1);
boost_pwm_max_count = 1000000L / (16 * configPage3.boostFreq * 2); //Converts the frequency in Hz to the number of ticks (at 16uS) it takes to complete 1 cycle. The x2 is there because the frequency is stored at half value (in a byte) to allow freqneucies up to 511Hz
vvt_pwm_max_count = 1000000L / (16 * configPage3.vvtFreq * 2); //Converts the frequency in Hz to the number of ticks (at 16uS) it takes to complete 1 cycle
//TIMSK1 |= (1 << OCIE1A); //Turn on the A compare unit (ie turn on the interrupt) //Shouldn't be needed with closed loop as its turned on below
@ -49,6 +49,8 @@ void initialiseAuxPWM()
boostPID.SetOutputLimits(0, boost_pwm_max_count);
boostPID.SetMode(AUTOMATIC); //Turn PID on
boostCounter = 0;
}
void boostControl()
@ -57,11 +59,13 @@ void boostControl()
{
if(currentStatus.MAP < 100) { TIMSK1 &= ~(1 << OCIE1A); digitalWrite(pinBoost, LOW); return; } //Set duty to 0 and turn off timer compare
boost_cl_target_boost = get3DTableValue(&boostTable, currentStatus.TPS, currentStatus.RPM) * 2; //Boost target table is in kpa and divided by 2
boostPID.SetTunings(configPage3.boostKP, configPage3.boostKI, configPage3.boostKD);
if( (boostCounter & 31) == 1) { boostPID.SetTunings(configPage3.boostKP, configPage3.boostKI, configPage3.boostKD); } //This only needs to be run very infrequently, once every 32 calls to boostControl(). This is approx. once per second
boostPID.Compute();
TIMSK1 |= (1 << OCIE1A); //Turn on the compare unit (ie turn on the interrupt)
}
else { TIMSK1 &= ~(1 << OCIE1A); } // Disable timer channel
boostCounter++;
}
void vvtControl()
@ -75,7 +79,7 @@ void vvtControl()
else { TIMSK1 &= ~(1 << OCIE1B); } // Disable timer channel
#endif
}
//The interrupt to control the Boost PWM
ISR(TIMER1_COMPA_vect)
{
@ -91,7 +95,7 @@ ISR(TIMER1_COMPA_vect)
OCR1A = TCNT1 + boost_pwm_target_value;
boost_pwm_cur_value = boost_pwm_target_value;
boost_pwm_state = true;
}
}
}
//The interrupt to control the VVT PWM
@ -109,14 +113,13 @@ ISR(TIMER1_COMPB_vect)
OCR1B = TCNT1 + vvt_pwm_target_value;
vvt_pwm_cur_value = vvt_pwm_target_value;
vvt_pwm_state = true;
}
}
}
#elif defined (CORE_TEENSY)
//YET TO BE IMPLEMENTED ON TEENSY
void initialiseAuxPWM() { }
void boostControl() { }
void boostControl() { }
void vvtControl() { }
#endif

6
speeduino/speeduino.ino
View File

@ -889,7 +889,10 @@ void loop()
//And check whether the tooth log buffer is ready
if(toothHistoryIndex > TOOTH_LOG_SIZE) { BIT_SET(currentStatus.squirt, BIT_SQUIRT_TOOTHLOG1READY); }
}
if(toothHistoryIndex > TOOTH_LOG_SIZE) { BIT_SET(currentStatus.squirt, BIT_SQUIRT_TOOTHLOG1READY); }
if( (mainLoopCount & 63) == 1)
{
boostControl(); //Most boost tends to run at about 30Hz, so placing it here ensures a new target time is fetched frequently enough
}
//The IAT and CLT readings can be done less frequently. This still runs about 4 times per second
if ((mainLoopCount & 255) == 1)
{
@ -900,7 +903,6 @@ void loop()
readBat();
vvtControl();
boostControl(); //Most boost tends to run at about 30Hz, so placing it here ensures a new target time is fetched frequently enough
idleControl(); //Perform any idle related actions. Even at higher frequencies, running 4x per second is sufficient.
}
if(configPage4.iacAlgorithm == 4) { idleControl(); } //Run idlecontrol every loop for stepper idle.