//*****************************************************************************
// File Name    : datalogger.c
// 
// Title                : Windlogger
// Revision          : 0.3  22-10-2006

// Revision History:
// When   Who                  Description of change
// -----------  -----------       -----------------------
// 20-Oct-2002  pstang        Created the program
// Oct - 2006 RifRaf changes stuff
//*****************************************************************************
 
//----- Include Files ---------------------------------------------------------
#include <avr/io.h>            // include I/O definitions (port names, pin names, etc)
#include <avr/signal.h>        // include "signal" names (interrupt names)
#include <avr/interrupt.h>     // include interrupt support
 
#include "global.h"            // include our global settings
#include "uart.h"              // include uart function library
#include "rprintf.h"           // include printf function library
#include "timer.h"             // include timer function library (timing, PWM, etc)
#include "a2d.h"               // include A/D converter function library
#include "vt100.h"             // include VT100 terminal support
#include "extint.h"	           // include external interrupt library

#define SetBit(BIT, PORT)        PORT |= (1<<BIT)
#define ClearBit(BIT, PORT)      PORT &= ~(1<<BIT)
#define IsHigh(BIT, PORT)       (PORT & (1<<BIT)) != 1
#define IsLow(BIT, PORT)        (PORT & (1<<BIT)) == 1
#define on  0
#define off 1

//global variables
unsigned int volts;       // Current value of Battery Volts
unsigned int shuntvolts;  // Current value of Shunt Volts (AMPS)
unsigned int mode;        // Dummy load on or off
volatile u16 Int0Count;
volatile u16 Int1Count;
u16 rpm;                   // AC Volts IN frequency per 0 seconds
u16 windpulse;             // Windspeed Pulses per 0 seconds
u16 direction;              // Wind Direction

// functions 
void SwitchToCharging(void);
void SwitchToLoad(void);
void rpmSetup(void);
int windDirection(void);
void checkDirection(void);
void myInt0Handler(void);
void myInt1Handler(void);
 
//----- Begin Code ------------------------------------------------------------
 
int main(void)
{
    uartInit();
    uartSetBaudRate(4800);    // set UART speed to 9600 baud
    rprintfInit(uartSendByte);
    timerInit();
    a2dInit();
 
    vt100ClearScreen();
	//rprintf("hello");
            
    DDRC = 0x00;
    DDRD = 0xF0;
	PORTC = 0x00;
	PORTD = 0xF0;
		 
    a2dSetPrescaler(ADC_PRESCALE_DIV64);
    a2dSetReference(ADC_REFERENCE_AVCC);
	rpmSetup();
	SwitchToCharging(); mode = 1;
         
    while (1)                 // do this until finished or broken
    {
    volts      = a2dConvert10bit(0);    // Get ADC Value
    shuntvolts = a2dConvert10bit(1);    // Get ADC Value
	Int0Count = 0;          // reset interrupt counters
	Int1Count = 0;          // reset interrupt counters
	timerPause(5000);       // wait 0 seconds
	rpm       = Int0Count;  // get counter values
	windpulse = Int1Count;  // get counter values
	checkDirection();
		if (volts > 620) { mode = 0; SwitchToLoad(); }
        if (volts < 580) { mode = 1;  SwitchToCharging(); }
    vt100SetCursorPos(1,1);
    rprintf("[<V>%d</V><I>%d</I><R>%d</R><S>%d</S><M>%d<M><D>%d</D>]\r\n",volts,shuntvolts,rpm,windpulse,mode,direction);
    } 
}
 
void checkDirection(void)    {
        if (0) {      }
        else if ( !(PINC & (1<<PC5)) & !(PINC & (1<<PC4)) & !(PIND & (1<<PD7))) {direction =  1; } // NNNE
		else if ( !(PINC & (1<<PC5)) & !(PINC & (1<<PC4)) & !(PINC & (1<<PC3))) {direction =  5; }
		else if ( !(PINC & (1<<PC4)) & !(PINC & (1<<PC3)) & !(PINC & (1<<PC2))) {direction =  9; }
		else if ( !(PINC & (1<<PC3)) & !(PINC & (1<<PC2)) & !(PIND & (1<<PD4))) {direction = 13; }
		else if ( !(PINC & (1<<PC2)) & !(PIND & (1<<PD4)) & !(PIND & (1<<PD5))) {direction = 17; }
		else if ( !(PIND & (1<<PD4)) & !(PIND & (1<<PD5)) & !(PIND & (1<<PD6))) {direction = 21; }
		else if ( !(PIND & (1<<PD5)) & !(PIND & (1<<PD6)) & !(PIND & (1<<PD7))) {direction = 25; }
		else if ( !(PINC & (1<<PC5)) & !(PIND & (1<<PD6)) & !(PIND & (1<<PD7))) {direction = 29; }
        else if ( !(PINC & (1<<PC4)) & !(PIND & (1<<PD7)))                       {direction =  0; } // N
		else if ( !(PINC & (1<<PC5)) & !(PINC & (1<<PC4)))                       {direction =  2; } // NNE
		else if ( !(PINC & (1<<PC5)) & !(PINC & (1<<PC3)))                       {direction =  4; }
		else if ( !(PINC & (1<<PC4)) & !(PINC & (1<<PC3)))                       {direction =  6; }
		else if ( !(PINC & (1<<PC4)) & !(PINC & (1<<PC2)))                       {direction =  8; } // E
		else if ( !(PINC & (1<<PC3)) & !(PINC & (1<<PC2)))                       {direction = 10; }
		else if ( !(PINC & (1<<PC3)) & !(PIND & (1<<PD4)))                       {direction = 12; }
		else if ( !(PINC & (1<<PC2)) & !(PIND & (1<<PD4)))                       {direction = 14; }
		else if ( !(PINC & (1<<PC2)) & !(PIND & (1<<PD5)))                       {direction = 16; } // S
		else if ( !(PIND & (1<<PD4)) & !(PIND & (1<<PD5)))                       {direction = 18; }
		else if ( !(PIND & (1<<PD4)) & !(PIND & (1<<PD6)))                       {direction = 20; }
		else if ( !(PIND & (1<<PD5)) & !(PIND & (1<<PD6)))                       {direction = 22; }
		else if ( !(PIND & (1<<PD5)) & !(PIND & (1<<PD7)))                       {direction = 24; } // W
		else if ( !(PIND & (1<<PD6)) & !(PIND & (1<<PD7)))                       {direction = 26; }
		else if ( !(PINC & (1<<PC5)) & !(PIND & (1<<PD6)))                       {direction = 28; }
		else if ( !(PINC & (1<<PC5)) & !(PIND & (1<<PD7)))                       {direction = 30; }
		else if ( !(PINC & (1<<PC5)))                                             {direction =  3; } // ENEE
		else if ( !(PINC & (1<<PC4)))                                             {direction =  7; }
		else if ( !(PINC & (1<<PC3)))                                             {direction = 11; }
		else if ( !(PINC & (1<<PC2)))                                             {direction = 15; }
		else if ( !(PIND & (1<<PD4)))                                             {direction = 19; }
		else if ( !(PIND & (1<<PD5)))                                             {direction = 23; }
		else if ( !(PIND & (1<<PD6)))                                             {direction = 27; }
		else if ( !(PIND & (1<<PD7)))                                             {direction = 31; }
        else         {      }
}

void rpmSetup(void)
{
	extintInit();
	extintConfigure(EXTINT0, EXTINT_EDGE_RISING);
	extintConfigure(EXTINT1, EXTINT_EDGE_RISING);
	extintAttach(EXTINT0, myInt0Handler);
	extintAttach(EXTINT1, myInt1Handler);
	sbi(GIMSK, INT0);
	sbi(GIMSK, INT1);
}

void myInt0Handler(void)
{
	Int0Count++;
}

void myInt1Handler(void)
{
	Int1Count++;
}

void SwitchToCharging(void) { 
  ClearBit(0, PORTB) ; 
  return;
}
 
void SwitchToLoad(void) { 
  SetBit(0, PORTB) ;
  return;
}