Car Lights 1.3

/*
Copyright 2012 D Westaby

----------------------------------------------------------------------
   Car Lights for Attiny2313
----------------------------------------------------------------------
Title:      Car_Lighting.D
Author:     Dustin Westaby
Date Created:   September 8, 2012
Date Modified:   September 23, 2012

Compiled with AVR-GCC WinAVR

----------------------------------------------------------------------
    Fuses:
----------------------------------------------------------------------
 BrownOut Disabled
 CKDIV8
 Int RC Osc 8Mhz + 64ms

----------------------------------------------------------------------
    Inputs:
----------------------------------------------------------------------
 None

----------------------------------------------------------------------
    Ouputs:
----------------------------------------------------------------------
 pin  i/o  port    circuit trace       connection
----------------------------------------------------------------------
  4    1   PA1 =   R_LED1
  5    1   PA0 =   L_LED2
  2    1   PD0 =   R_LED3
  3    1   PD1 =   R_LED4
  6    1   PD2 =   R_LED5
  7    1   PD3 =   R_LED6
 14    1   PB2 =   L_LED7
 17    1   PB5 =   L_LED8
 18    1   PB6 =   L_LED9
 19    1   PB7 =   L_LED10

*/

//--------------------------------------
//          Global Variables           |
//--------------------------------------
// 8 MHz Internal Oscillator DIV8 (used for delay subroutines)
// One CPU Cycle = 1us
#define F_CPU 8000000UL/8

#define R_LED1_PA1  (1)
#define L_LED2_PA0  (0)
#define R_LED3_PD0  (0)
#define R_LED4_PD1  (1)
#define R_LED5_PD2  (2)
#define R_LED6_PD3  (3)
#define L_LED7_PB2  (2)
#define L_LED8_PB5  (5)
#define L_LED9_PB6  (6)
#define L_LED10_PB7 (7)


#define CONST_DIM_DELAY_ON  (200)
#define CONST_DIM_DELAY_OFF (4000)

/* This value is used to count us of delay and convert to ms
   Due to other cpu processing: "1ms of delay" < "1000us of delay" */
//#define TIME_CONVERSION_VAL (50) //actual number should be 150 (am running faster)
#define TIME_CONVERSION_VAL (150)

int program_ms_counter;
int program_counter_us; //used for tracking time elapsed

//--------------------------------------
//              Includes               |
//--------------------------------------
#include <avr/io.h>
#include <util/delay.h>

//--------------------------------------
//          Delay Subroutines          |
//--------------------------------------
//These functions are from the delay.h include, the calls to delay functions
//are re-written here to allow for longer waits.
void delay_ms(uint16_t ms) {
        program_ms_counter+=ms;
        while ( ms )
        {
                _delay_ms(1);
                ms--;
        }
}
void delay_us(uint16_t us) {
  program_counter_us+=us;
  while ( us )
  {
    _delay_us(1);
    us--;
  }

  while(program_counter_us>=TIME_CONVERSION_VAL)
  {
          program_ms_counter++;
          program_counter_us-=TIME_CONVERSION_VAL;
  }
}

//--------------------------------------
//          Misc Subroutines          |
//--------------------------------------

void reset_ms_us_counters(void) {
        program_ms_counter=0;
        program_counter_us=0;
}

void all_LEDs_ON(void) {
        PORTA = 0xFF;
        PORTB = 0xFF;
        PORTD = 0xFF;
}

void all_LEDs_OFF(void) {
        PORTA = ~(0x03);
        PORTB = ~(0xFF);
        PORTD = ~(0xFF);
}

void program_left_turn_mode(void) {
        PORTA &= ~((1<<R_LED1_PA1)+(1<<L_LED2_PA0));
        PORTB &= ~((1<<L_LED10_PB7)+(1<<L_LED8_PB5));
        PORTD &= ~((1<<R_LED6_PD3)+(1<<R_LED5_PD2)+(1<<R_LED4_PD1)+(1<<R_LED3_PD0));
}

void program_brake_mode(void) {
        PORTA &= ~((1<<R_LED1_PA1)+(1<<L_LED2_PA0));
}

void program_right_turn_mode (void) {
        PORTA &= ~((1<<R_LED1_PA1)+(1<<L_LED2_PA0));
        PORTB &= ~((1<<L_LED10_PB7)+(1<<L_LED9_PB6)+(1<<L_LED8_PB5)+(1<<L_LED7_PB2));
        PORTD &= ~((1<<R_LED6_PD3)+(1<<R_LED4_PD1));
}

void program_all_dim_loop (int timer_val) {

    while(program_ms_counter < timer_val)
    {
        all_LEDs_ON();
        delay_us(CONST_DIM_DELAY_ON);
        all_LEDs_OFF();
        delay_us(CONST_DIM_DELAY_OFF);
    }

}

void program_break_loop (int timer_val) {

    while(program_ms_counter < timer_val)
    {
        all_LEDs_ON();
        delay_us(CONST_DIM_DELAY_ON);
        program_brake_mode();
        delay_us(CONST_DIM_DELAY_OFF);
    }

}

void program_left_turn_loop (int timer_val) {

    while(program_ms_counter < timer_val)
    {
        all_LEDs_ON();
        delay_us(CONST_DIM_DELAY_ON);
        program_left_turn_mode();
        delay_us(CONST_DIM_DELAY_OFF);
    }

}

void program_right_turn_loop (int timer_val) {

    while(program_ms_counter < timer_val)
    {
        all_LEDs_ON();
        delay_us(CONST_DIM_DELAY_ON);
        program_right_turn_mode();
        delay_us(CONST_DIM_DELAY_OFF);
    }

}


//--------------------------------------
//               Main                  |
//--------------------------------------
int main (void)
{

  /* ---------------------------------------------------------------- */
  /*                            Initialization                        */
  /* ---------------------------------------------------------------- */

  //Initialize all ports as outputs
  DDRA =  0b00000011; //A0, A1
  DDRB =  0b11111111;
  DDRD =  0b11111111;

  all_LEDs_OFF();

/* ---------------------------------------------------------------- */
/*                              Main Loop                           */
/* ---------------------------------------------------------------- */

  while(1)
  {

        //1 - All dim nothing happens (resting natural state)
        reset_ms_us_counters();
        program_all_dim_loop(6000);

        //2 - left turn, all dim, 2 will blink at ½ sec for 5 sec.
        reset_ms_us_counters();
        while(program_ms_counter < 5000)
        {
            program_left_turn_loop(program_ms_counter+500);
            program_all_dim_loop  (program_ms_counter+500);
        }
        //then dim for 1 sec
        program_all_dim_loop(6000);

        //3 – brakes get bright (8 LED’s) for 2 sec then dim for 1 for 6 seconds
        reset_ms_us_counters();
        while(program_ms_counter < 6000)
        {
            program_break_loop  (program_ms_counter+2000);
            program_all_dim_loop(program_ms_counter+1000);
        }

        //4 - All dim nothing happens (resting natural state)
        reset_ms_us_counters();
        program_all_dim_loop(6000);

        //5 – right turn, all dim, 2 will blink at ½ sec for 5 sec.
        reset_ms_us_counters();
        while(program_ms_counter < 5000)
        {
            program_right_turn_loop(program_ms_counter+500);
            program_all_dim_loop   (program_ms_counter+500);
        }
        //then dim for 1 sec.
        program_all_dim_loop(6000);

        //6 – brakes get bright (8 LED’s) for 2 sec then dim for 1 for 6 seconds
        reset_ms_us_counters();
        while(program_ms_counter < 6000)
        {
            program_break_loop  (program_ms_counter+2000);
            program_all_dim_loop(program_ms_counter+1000);
        }

}

  while(1);                 // Ending infinite loop (just in case)

}