/****************************************************************************/
/* Copyright 2010 MBARI.                                                    */
/* MBARI Proprietary Information. All rights reserved.                      */
/****************************************************************************/
#include "dig_io.h"
#include "p24Fxxxx.h"
#include "sys_defs.h"

static int dummyBit;

#define TOTAL_OUT_BITS  16

#define OUT_BIT_0 LATAbits.LATA0 // Temperature Sensor Chan 0 CS*
#define OUT_BIT_1 LATAbits.LATA1 // Temperature Sensor Chan 1 CS*
#define OUT_BIT_2 LATBbits.LATB8 // Temperature Sensor Chan 2 CS*
#define OUT_BIT_3 LATBbits.LATB4 // ADC CS*
#define OUT_BIT_4 LATAbits.LATA4 // Beta-Dyne Sync
#define OUT_BIT_5 LATBbits.LATB5 // Fan Control
#define OUT_BIT_6 dummyBit  
#define OUT_BIT_7 dummyBit  

#define OUT_BIT_8 dummyBit 
#define OUT_BIT_9 dummyBit 
#define OUT_BIT_10 dummyBit 
#define OUT_BIT_11 dummyBit 
#define OUT_BIT_12 dummyBit 
#define OUT_BIT_13 dummyBit 
#define OUT_BIT_14 dummyBit 
#define OUT_BIT_15 dummyBit 


#define TOTAL_IN_BITS  8

#define IN_BIT_0 PORTBbits.RB6 // Fan State 
#define IN_BIT_1 dummyBit 
#define IN_BIT_2 dummyBit 
#define IN_BIT_3 dummyBit 
#define IN_BIT_4 dummyBit 
#define IN_BIT_5 dummyBit
#define IN_BIT_6 dummyBit 
#define IN_BIT_7 dummyBit 




/* init registers */
void digInit()
{
    /* Note: the AD1PCFGL and TRIS registers have to be set on 
    ADC pins if you want to use them as digital I/O pins */    

	/* Set up shared analog/digital pins as digital */
	AD1PCFGbits.PCFG0 = 1;
	AD1PCFGbits.PCFG1 = 1;
	AD1PCFGbits.PCFG2 = 1;
	AD1PCFGbits.PCFG3 = 1;
	AD1PCFGbits.PCFG4 = 1;
	AD1PCFGbits.PCFG5 = 1;
	AD1PCFGbits.PCFG9 = 1;
	AD1PCFGbits.PCFG10 = 1;
	AD1PCFGbits.PCFG11 = 1;
	AD1PCFGbits.PCFG12 = 1;	

    /* set outputs here */

	TRISAbits.TRISA0 = 0;
	TRISAbits.TRISA1 = 0;
	TRISAbits.TRISA4 = 0;
	TRISBbits.TRISB11 = 0;
	TRISBbits.TRISB14 = 0;
	TRISBbits.TRISB4 = 0;
	TRISBbits.TRISB5 = 0;
	TRISBbits.TRISB8 = 0;



	TRISBbits.TRISB3 = 0; // Used for UART1 TxD 
       
    /* set inputs here */

   	/* TRISBbits.TRISB12 = 1;
	 AD1PCFGbits.PCFG12 = 1;
	 TRISBbits.TRISB13 = 1;
	 AD1PCFGbits.PCFG13 = 1;
*/
	TRISBbits.TRISB6 = 1; // Fan State
	
	TRISBbits.TRISB2 = 1; // Used for UART1 RxD


    /* put out bits in default state here */
    Nop();
    OUT_BIT_0 = 1;
    Nop();
    OUT_BIT_1 = 1;    
    Nop();
    OUT_BIT_2 = 1;
    Nop();
    OUT_BIT_3 = 1;
    Nop();
    OUT_BIT_4 = 0;
    Nop();
    OUT_BIT_5 = 0;
 
}

/* power bit API */
void digSetOutBit(int bit, int state)
{
    /* state is non zero, set it to one */
    if ( state )
        state = 1;
    
    Nop();

    switch (bit)
    {
        case 0: OUT_BIT_0 = state; break;
        case 1: OUT_BIT_1 = state; break;
        case 2: OUT_BIT_2 = state; break;
        case 3: OUT_BIT_3 = state; break;
        case 4: OUT_BIT_4 = state; break;
        case 5: OUT_BIT_5 = state; break;

        default: return;
    }
}

int digGetOutBit(int bit)
{
    Nop();

    /* set dummyBit to 0 so undefined bits always read back as 0 */
    dummyBit = 0;
    
    switch (bit)
    {
        case 0: return (int)OUT_BIT_0;
        case 1: return (int)OUT_BIT_1;
        case 2: return (int)OUT_BIT_2;
        case 3: return (int)OUT_BIT_3;
        case 4: return (int)OUT_BIT_4;
        case 5: return (int)OUT_BIT_5;

        default: return 0;
    }
}

void digSetOutPort(unsigned int val)
{
    int i;
    unsigned int bit = 0x0001;
     
    for (i = 0; i < TOTAL_OUT_BITS; ++i)
    {
        digSetOutBit(i, (val & bit));
        bit <<= 1;
    }
}

unsigned int digGetOutPort(void)
{
    int i;
    unsigned int bit = 0x0001;
    unsigned int val = 0;

    for (i = 0; i < TOTAL_OUT_BITS; ++i)
    {
        if ( digGetOutBit(i) )
            val += bit;
        
        bit <<= 1;
    }

    return val;
}

/* digital input API */
int digGetInBit(int bit)
{
    Nop();

    /* set dummyBit to 0 so undefined bits always read back as 0 */
    dummyBit = 0;
    
    switch (bit)
    {
        case 0: return (int)IN_BIT_0;
        case 1: return (int)IN_BIT_1;
        case 2: return (int)IN_BIT_2;
        case 3: return (int)IN_BIT_3;
        case 4: return (int)IN_BIT_4;
        case 5: return (int)IN_BIT_5;
        case 6: return (int)IN_BIT_6;
        case 7: return (int)IN_BIT_7;


        default: return 0;
    }
}

unsigned int digGetInPort(void)
{
    int i;
    unsigned int bit = 0x0001;
    unsigned int val = 0;

    for (i = 0; i < TOTAL_IN_BITS; ++i)
    {
        if ( digGetInBit(i) )
            val += bit;
        
        bit <<= 1;
    }

    return val;
}