Garrett 712120 VNT Hella 6NW 008 412 actuator.

Code:

#include <avr/interrupt.h>



int vntPin = 9;        // LED connected to digital pin 9

int vanePos = 0 ;

int cnt = 0;

int dir = 0;



void setup()    { 

    //graph

    Serial.begin(57600);



    //140hz 7.1ms ==

    TCCR1A = _BV(COM0A0) | _BV(WGM01);

    TCCR1B = _BV(CS02) | _BV(CS00);

    OCR1A = 222;

} 



void loop()    { 

    if  (cnt % 1000==0) {

        if (dir==1) {

            if(vanePos < 255) { 

                vanePos +=25.5;

                if (vanePos>255)vanePos=255;

            } 

            else {

                dir=0;

            }

        } 

        else {

            if(vanePos >0) { 

                vanePos -=25.5;

                if (vanePos<0) vanePos=0;

            } 

            else {

                dir=1;

            }

        }    

        analogWrite(vntPin, vanePos);                 

    } 



    Serial.println(analogRead(0));



    delay(5);

    cnt+=5;

}

Code:

#include <p18cxxx.h>

#include "enc28j60.h"

#include "typedefs.h"



void init(void);

void pwm_init(void);

void isr_high(void);

void isr_low(void);



volatile BYTE pwm_duty_cycle = 128;

#define PWM_HIGH_STATE 0

#define PWM_LOW_STATE 1



/**************** INTERRUPTS ****************/

#pragma code high_vector=0x08

void interrupt_at_high_vector(void) {

    _asm GOTO isr_high _endasm

}

#pragma code



#pragma code low_vector=0x18

void interrupt_at_low_vector(void) {

    _asm GOTO isr_low _endasm

}

#pragma code



#pragma interrupt isr_high

void isr_high(void) {

    /**High Priority ISR**/

    /**Timer0 Overflow**/

    //TMR0L = 32;

    static BYTE pwm_num_ovrflw = 0;

    TMR0L = 40;

    if (pwm_num_ovrflw == pwm_duty_cycle) {

        // PWM Pin Low

        PORTCbits.RC5 = PWM_LOW_STATE;

    }else if (pwm_num_ovrflw == 0xFF) {

        pwm_num_ovrflw = 0;

        // PWM Pin High

        PORTCbits.RC5 = PWM_HIGH_STATE;

    }

    pwm_num_ovrflw++;

    //Clear Interrupt Flag

    INTCONbits.TMR0IF = 0;

}



#pragma interruptlow isr_low

void isr_low(void) {

    /**Low Priority ISR**/

}

/************** END INTERRUPTS **************/



void main (void) {

    init();

    while (1) {

        _asm NOP _endasm

    }

}



void init (void) {

    

    //Set Oscillator to 64MHz

    OSCCONbits.IRCF0 = 1;

    OSCCONbits.IRCF1 = 1;

    OSCCONbits.IRCF2 = 1;



    //Set Pin 12 Output High (Pin 12 is the power source for the level shifter)

    TRISBbits.TRISB5 = 0;

    PORTBbits.RB5 = 1;



    //Enable Interrupt Priority

    RCONbits.IPEN = 1;

    //Disable All Individual Interrupts

    INTCON = 0;

    INTCON3 = 0;

    //Set All Peripherial Interrupts = Disabled & Low Priority

    PIE1 = 0;

    IPR1 = 0;

    PIE2 = 0;

    IPR2 = 0;

    //Global High/Low Priority Interrupt Enable

    INTCONbits.GIEH = 1;

    INTCONbits.GIEL = 1;



    // Initialize the Ethernet Module

    //enc_init();



    // Start PWM Output

    pwm_init();

}



void pwm_init (void) {

    /*

    Timer0 PWM Setup

        Increment at 8MHz (0.125us)

        Overflow every 27.9017858us (35840Hz) (for 256 step PWM)

            = Increment 223.214286x Before Overflow

                -> Start Timer at 255-223 = 32

    */



    // Pin 5 as Output

    TRISCbits.TRISC5 = 0;

    

    // PWM Low

    PORTCbits.RC5 = PWM_LOW_STATE;

    

    //Disable Timer0

    T0CONbits.TMR0ON = 0;



    // 8-Bit Timer

    T0CONbits.T08BIT = 1;



    // Use Instruction Clock

    T0CONbits.T0CS = 0;



    // 1:2 Prescaler, 8MHz

    T0CONbits.PSA = 0;

    T0CONbits.T0PS0 = 0;

    T0CONbits.T0PS1 = 0;

    T0CONbits.T0PS2 = 0;



    // Enable Timer0 Overflow Interrupt

    INTCONbits.TMR0IF = 0;

    INTCONbits.TMR0IE = 1;



    //Enable Timer

    T0CONbits.TMR0ON = 1;

}