#include <pic.h>

/********************************************************
*  
* Program Title:     ADC Using PICKit 1 RP1 and LED D0 through D7  
*
* Program File Name: Lab_4A.c  
*
* Microprocessors A 17.383
*
* xxxxxxxx - Put in Semester (i.e. Fall 2010) here
*
* xxxxxxxx - Put in your name here
*
* xx/xx/xx - Put date here  
*
********************************************************/


/********************************************************
* Function: main
*
* Description:  D0 - D7 on PICkit 1 will Display the results of the ADC
*
* Notes:
*
* RA0 - Input from RP1
*
*
*
* Returns:  This routine contains an infinite loop
*
********************************************************/

/* Configuration Word */

__CONFIG(INTIO & WDTDIS & PWRTEN & MCLRDIS & UNPROTECT \
  & UNPROTECT & BORDIS & IESODIS & FCMDIS);


void PORTA_init(void);
void ADC_Disp(void);
void Delay_LED_On(void);

int ADC_Value = 0;

const char PORTA_Value[8] = {
	0b010000,	// D0
	0b100000, 	// D1
	0b010000, 	// D2
	0b000100, 	// D3
    	0b100000, 	// D4
    	0b000100, 	// D5
    	0b000100, 	// D6
    	0b000010};	// D7
    
const char TRISA_Value[8] = {
	0b001111, 	// D0
	0b001111, 	// D1
	0b101011, 	// D2
	0b101011, 	// D3
    	0b011011, 	// D4
    	0b011011, 	// D5
    	0b111001, 	// D6
    	0b111001};	// D7
    
main()
{

	PORTA_init();

    ANSEL = 1;                  //  Just RA0 is an Analog Input
    TRISA0 = 1;					//  Corresponding TRIS bit is set as input

    ADCON0 = 0b00000001;        //  Turn on the ADC
                                //   Bit 7 		- Left Justified Sample
                                //   Bit 6 		- Use VDD
                                //   Bit 4:2 	- Channel 0
                                //   Bit 1 		- Do not Start
                                //   Bit 0 		- Turn on ADC
                                
    ADCON1 = 0b00010000;        //  Select the Clock as Fosc/8


    ADC_Disp();
    GODONE = 1;			// Start A/D Conversion


    while(1 == 1)               //  Loop Forever
    {
       
        if (GODONE == 0)			// Is A/D Conversion complete?
        	{	ADC_Disp();		// Display A/D Conversion Results
	        	ADC_Value = ADRESH;	// Get new A/D value
	        	GODONE = 1;		// Start the next A/D Conversion
	        }
	    else				// A/D Conversion still in progress
	    		ADC_Disp();

	} 
}

/******** END OF main ROUTINE ***************************/

/********************************************************
* Function: PORT_init
*
* Description:  Initializes PORTA to a known condition
*
* Notes:    None
*
* Returns:  None
*
********************************************************/
void PORTA_init(void)
{
    PORTA = 0;                  //  All PORTA Pins are low
    CMCON0 = 7;                 //  Turn off Comparators
    ANSEL = 0;                  //  Turn off ADC

    return;

}
/******** END OF PORTA_init ****************************/



/********************************************************
* Function: ADC_Disp
*
* Description:  Displays the value of A/D Conversion on D0 - D7
*
* Notes:
*
* 
*
* Returns:  None
*
********************************************************/
void ADC_Disp(void)
{

	int i;

	for (i = 0; i < 8; i++ )
        {                       			// Loop through Each of the 8 LEDS

	    Delay_LED_On();				// Allows time for individual LEDs to light
			
            if ((ADC_Value & (1 << i)) == 0)
                PORTA = 0;
            else
                PORTA = PORTA_Value[i];
            	TRISA = TRISA_Value[i];
        }  //  
		
	return;

}
/******** END OF ADC_Disp *************************/

/********************************************************
* Function: delay_LED_On
*
* Description:  Causes a delay in program execution
*
* Notes:
*
* Delay was determined through trial and error
*
* Returns:  None
*
********************************************************/
void Delay_LED_On(void)
{
	int j;
	
	for (j = 0; j < 60; j++);  		//  Display "On" Loop 
    			
	return;

}
/******** END OF Delay_LED_On *************************/