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Another update. Tow/Haul mode.
https://www.youtube.com/watch?v=sy-IBEU7eOg
This code still does not contain any safety for the downshifting. I'm going to get a LCD screen next and start outputting some of the actions to the screen. Also I'll start pulling in RPM inputs once I build out that interface. (I'm just going to cheat to simulate that, I'll use my signal generator and frequency/4 = rpm) I can just use a pot for the TPS. No need to build another arudino code just to simulate that.
https://www.youtube.com/watch?v=sy-IBEU7eOg
This code still does not contain any safety for the downshifting. I'm going to get a LCD screen next and start outputting some of the actions to the screen. Also I'll start pulling in RPM inputs once I build out that interface. (I'm just going to cheat to simulate that, I'll use my signal generator and frequency/4 = rpm) I can just use a pot for the TPS. No need to build another arudino code just to simulate that.
Code:
#define NUM_FWD_GEARS 4 //# number of forward speeds
#define BUTTON_READ_INTERVAL 50ul //mS time between up/down button reads
#define NO_PRESS 0x00 //mask bit mask for no buttons pressed
#define BUTTON_UP_PRESSED 0x01 //mask bit mask for up button pressed
#define BUTTON_DOWN_PRESSED 0x02 //mask bit mask for down button pressed
#define TCC_DELAY 1000ul //mS after TCC is enabled, time delay before activation
const byte buttonUP = 2; //pin Push Button for UP shift
const byte buttonDOWN = 4; //pin Push Button for Down shift
const byte switchTOWMODE = 7; //pin Switch for tow/haul mode
const byte solA = 3; //pin Solenoid A output
const byte solB = 5; //pin Solenoid B output
const byte TCC = 6; //pin TCC output
byte
gearSelection,
lastGearSelection,
lastUp,
lastDn,
lastTM;
bool
bTCCStatus;
typedef struct structGearSolenoidProfiles
**
byte solenoid_A;
byte solenoid_B;
bool bTCCGearEnable;
}sGearSolenoidProfiles;
//
// How does Arduino know reverse, park or drive?
//
const sGearSolenoidProfiles GearSolenoidProfiles[NUM_FWD_GEARS] =
**
**
//1st
.solenoid_A = HIGH,
.solenoid_B = LOW,
.bTCCGearEnable = false
},
**
//2nd
.solenoid_A = LOW,
.solenoid_B = LOW,
.bTCCGearEnable = false
},
**
//3rd
.solenoid_A = LOW,
.solenoid_B = HIGH,
.bTCCGearEnable = true
},
**
//4th
.solenoid_A = HIGH,
.solenoid_B = HIGH,
.bTCCGearEnable = true
}
};//GearSolenoidProfiles[]
void setup()
**
Serial.begin(115200); //debug
pinMode( buttonUP, INPUT_PULLUP );
lastUp = digitalRead( buttonUP ); //set initial button state
pinMode( buttonDOWN, INPUT_PULLUP );
lastDn = digitalRead( buttonDOWN ); //set initial button state
pinMode( switchTOWMODE, INPUT_PULLUP );
pinMode( solA, OUTPUT ); //Solenoid A set as output
pinMode( solB, OUTPUT ); //Solenoid B set as output
pinMode( TCC, OUTPUT ); //TCC set as output
digitalWrite( solA, LOW ); //set intital state as off
digitalWrite( solB, LOW );
digitalWrite( TCC, LOW );
//internal flag for TCC status
bTCCStatus = false;
gearSelection = 0; //start in "1st" gear for this test
lastGearSelection = 0xff; //ensure we change into correct gear first pass by making last != current
}//setup
void loop()
**
Gear_Selection_Control();
Gear_Solenoid_Control();
TCC_Control();
}//loop
void Gear_Selection_Control( void )
**
byte
btnState;
btnState = ReadButtons();
switch( btnState )
**
case NO_PRESS:
//nothing pressed or not read (interval not elapsed); no action
break;
case BUTTON_UP_PRESSED:
if( gearSelection < (NUM_FWD_GEARS-1) )
**
Serial.println( "GSelC: Gear++" );
gearSelection++;
}//if
break;
case BUTTON_DOWN_PRESSED:
if( gearSelection > 0 )
**
Serial.println( "GSelC: Gear--" );
gearSelection--;
}//if
break;
default:
//only remaining possibility is both pressed; ignore with no action
break;
}//switch
}//void
void Gear_Solenoid_Control( void )
**
if( gearSelection != lastGearSelection )
**
Serial.print( "GSolC: Gear Selected - Old: " );
Serial.print( lastGearSelection );
Serial.print( " New: " );
Serial.println( gearSelection );
lastGearSelection = gearSelection;
digitalWrite( solA, GearSolenoidProfiles[gearSelection].solenoid_A );
digitalWrite( solB, GearSolenoidProfiles[gearSelection].solenoid_B );
}//if
}//Gear_Control
// TCC state machine names
#define ST_TCC_OFF 0
#define ST_TCC_DELAY 1
#define ST_TCC_ON 2
//
void TCC_Control( void )
**
static unsigned long
timeTCCSolenoid;
static byte
stateTCC = ST_TCC_OFF;
unsigned long
tNow;
bool
bTCCEnabled;
if( gearSelection == 3 )
bTCCEnabled = true;
else if( gearSelection == 2 && digitalRead( switchTOWMODE ) == HIGH )
bTCCEnabled = true;
else
bTCCEnabled = false;
tNow = millis();
switch( stateTCC )
**
case ST_TCC_OFF:
if( bTCCEnabled == true )
**
Serial.println( "TCCC: TCC_OFF -> ON" );
timeTCCSolenoid = tNow;
stateTCC = ST_TCC_DELAY;
}//if
break;
case ST_TCC_DELAY:
if( bTCCEnabled == true )
**
if( (tNow - timeTCCSolenoid) >= TCC_DELAY )
**
Serial.println( "TCCC: TCC ON" );
digitalWrite( TCC, HIGH );
bTCCStatus = true;
stateTCC = ST_TCC_ON;
}//if
}//if
else
**
Serial.println( "TCCC: TCC_DELAY -> OFF" );
stateTCC = ST_TCC_OFF;
}//else
break;
case ST_TCC_ON:
if( bTCCEnabled == false )
**
Serial.println( "TCCC: TCC_ON -> OFF" );
digitalWrite( TCC, LOW );
bTCCStatus = false;
stateTCC = ST_TCC_OFF;
}//if
break;
}//switch
}//TCC_Control
//returns a mask:
//0b00000000 - no buttons pressed
//0b00000001 - up pressed
//0b00000010 - down pressed
//0b00000011 - both pressed
//
byte ReadButtons( void )
**
static unsigned long
timeButton = 0;
unsigned long
tNow;
byte
retval,
nowButton;
retval = NO_PRESS;
tNow = millis();
if( (tNow - timeButton) >= BUTTON_READ_INTERVAL )
**
//set up for next read interval
timeButton = tNow;
//read the button and set the flags
nowButton = digitalRead( buttonUP );
if( nowButton != lastUp )
**
lastUp = nowButton;
if( nowButton == LOW )
**
Serial.println( "RB: UP BTN" );
retval |= BUTTON_UP_PRESSED;
}
}//if
nowButton = digitalRead( buttonDOWN );
if( nowButton != lastDn )
**
lastDn = nowButton;
if( nowButton == LOW )
**
Serial.println( "RB: DN BTN" );
retval |= BUTTON_DOWN_PRESSED;
}
}//if
}//if
return retval;
}//ReadButtons
.
