#include <pic18.h>
#include <stdio.h>
#include <string.h>
#include "lcd.h"
#include "Delay.h"
// Delay.h is included inside lcd.c

#define LCD_LENGTH 16
#define LCD_ROWS 2


unsigned char global_Pot_Hi, global_Pot_Lo;
unsigned char global_LCD_Buffer[LCD_ROWS][LCD_LENGTH];
unsigned char global_serial_data;
unsigned char global_serial_recieve_buffer[LCD_LENGTH];
bit global_recieve_done = 0;
int global_serial_byte_counter = 0;

void serial_recieved(void);

// Nicked from H7
void ad_init(void)
{
	// AD Conversion clock
	ADCS0 = 0;
	ADCS1 = 0;
	ADCS2 = 0;

	//Select AN0/RA0 for AD source
		// In this (000) setup, it's only RA0/AN0 that does ad convertion.
	CHS0=0;
	CHS1=0;
	CHS2=0;
	
	//Only AN0 is selected for AD and with Vdd/Vss as limits
	PCFG0=0;
	PCFG1=1;
	PCFG2=1;
	PCFG3=1;
	
	//Result is left justified
	ADFM=0; 
	
	//Fire up for A/D converter module
	ADON=1;
}

void rs232_init(void)
{
	SPEN	= 0;	// Serial Port Enable Bit... 0 = disabled
	TRISC6	= 0;	
	TRISC7	= 1;

	SPBRG	= 207;	// 1200 baud rate... 25 = 9600
					// x = (Fosc / (16*[baud rate]) )-1
	TXSTA	= 0x24;	// Enables BRGH and TXEN inthe TXSTA register
	RCSTA	= 0x90;	// 0x90 enables SPEN and CREN in the RCSTA register
}

void interrupt_init(void)
{
	// Assumes that all interrupts default is 0
	PEIE	= 1;
	GIE		= 1;
	RCIE	= 1;	// Recieve interrupt enable.
	IPEN	= 0;	// Nfo interrupt priority
	TXIE	= 0;	// Serial interrupt enabled
}	

void pic18_io_init(void)
{
	TRISA0	= 1;	// analog input
	TRISB1	= 1;	// TRISB1-4 Digital input
	TRISB2	= 1;
	TRISB3	= 1;
	TRISB4	= 1;
}	

void sms_init(void)
{
}

void interrupt interrupt_handler(void)
{
	// Finds out what interrupt have been trigged, and starts the respective function.
	if(RCIF == 1)			// Serial recieve interrupt
	{
		serial_recieved();
		RCIF = 0;
	}
}		



void serial_send(void)
{
	int i;
	char tosend[3];
	char data;
	sprintf(tosend,"%s", "at\r");
	for(i = 0; i < 3; i++)
	{
		data = tosend[i];
		TXREG = data;
		while(TRMT==0) 
		DelayMs(1000);
	}
}	

void serial_recieved(void)
{
	char data, saved_data[LCD_LENGTH];
	
	data = RCREG;
	
	global_serial_recieve_buffer[global_serial_byte_counter] = data;
	if(data == '\r')
	{
		global_recieve_done = 1;
		global_serial_byte_counter = 0;
	}	
	else
	{
		global_serial_byte_counter++;
	}
	
}
	
void main()
{
/////////////////////////////////////////////
// Running Init's

	// Running init for various components.
	//AD_init();
	ad_init();
	rs232_init();
	pic18_io_init();
	lcd_init(0);
	interrupt_init();
	
/////////////////////////////////////////////
// Main loop

	while(1)
	{
	// Checking if A/D convertion is done, and save the data in global_Pot_??
		if(GODONE==0)
		{
			global_Pot_Hi = ADRESH;
			global_Pot_Lo = ADRESL;
			GODONE = 1;
		}
		
		if( global_recieve_done == 1 )
		{
			lcd_clear();
			lcd_goto(0x00);
			lcd_puts(global_serial_recieve_buffer);
			global_recieve_done = 0;
		}
	}
}