//init _uart:

//______________________________________________________

#include <p18cxxx.h>
#include "pic_init.h"

/*_______________define_________________*/
#define RS485_SENDEN_RE		LATDbits.LATD0
#define RS485_SENDEN_DE		LATDbits.LATD1

void init_uart (void)
{

/*________BAUDRATE programmieren________*/
BAUDCON	 	 = 0b11000000;	
TXSTA	 	 = 0b11101001;
RCSTA	 	 = 0b11100111;

/*BAUD */
SPBRG	 	 = (unsigned int) ((((10000000.0/19200.0)/4.0))-1.0);

/*____________MAX8032 RECIVE____________*/
//           __      (RE invertiert)
RS485_SENDEN_RE = 0;
RS485_SENDEN_DE = 0;
}





//pic_init:

//________________________________________________________

#include <p18cxxx.h>
#include "pic_init.h"



void pic_init (void)
{
// festlegen der Ports A-E ob Ein oder Ausgang
	TRISA = 0x00;
	TRISB = 0x01;
	TRISC = 0xc0;
	TRISD = 0x00;
	TRISE = 0x00;
// RS-485 senden


// Anfangsstatus der Ports C und D (~0x00 heißt, dass alle Ports am Pic high sind.)
	LATC = ~0x00;
	LATD = ~0x00;



	T0CON = 0b00000101;
//			  0-------	Timer0 On/Off Control bit 
//			  -0------ 	Timer0 is configured as a 16-bit timer/counter 
//			  --0-----	Internal instruction cycle clock (CLKO) 
//			  ---0----	Increment on low-to-high transition on T0CKI pin 
//			  ----0---	TImer0 prescaler is NOT assigned. Timer0 clock input bypasses prescaler.
//			  -----111	1:256 Prescale value	
// Timer0 Initalisiert (letzten 3 Bits geben das Vorteiler verhältniss an)


	T1CON = 0b11111000;
//			  1-------	Timer1 is configured as a 16-bit timer/counter 
//			  -1------ 	Timer1 clock from Timer1 oscillator 
//			  --11----	Prescale value (1:8) 
//			  ----1---	Timer1 Oscillator Enable bit
//			  -----0--	Timer1 External Clock Input Synchronization Select bit
//			  ------0-	Internal clock (FOSC/4)	
//            -------0  Stops Timer1 (1 Starts Timer1)
// Timer0 Initalisiert (letzten 3 Bits geben das Vorteiler verhältniss an)


// Timer init
INTCON2bits.TMR0IP = 1;	    // high priority
INTCONbits.TMR0IE = 1;		//Timer0 interrupt enable
INTCONbits.TMR0IF = 0;		//setzt interuptflag von Timer0 zurück auf 0


PIE1bits.TMR1IE = 1;		//Timer1 interrupt enable
PIR1bits.TMR1IF = 0;		//setzt interuptflag von Timer1 zurück auf 0

RCONbits.IPEN = 1;          //enable priority levels
INTCONbits.GIEH = 1;        //enable interrupts



}




//Main Slave:

//_______________________________________________________________



#include <p18cxxx.h>
#include "pic_init.h"

/*_____________Bootloader______________*/
#pragma config OSC = HSPLL
#pragma config FCMEN = OFF 
#pragma config IESO = OFF 
#pragma config PWRT = ON
#pragma config WDT = OFF, WDTPS = 128
#pragma config CCP2MX = PORTC, PBADEN = OFF, LPT1OSC =OFF, MCLRE = OFF
#pragma config STVREN = ON, LVP = OFF, XINST = OFF, DEBUG = OFF
#pragma config CP0 = OFF, CP1 = OFF, CP2 = OFF, CP3 = OFF
#pragma config CPB = OFF, CPD = OFF
#pragma config WRT0 = OFF, WRT1 = OFF, WRT2 = OFF, WRT3 = OFF
#pragma config WRTC = ON, WRTB = OFF, WRTD = OFF
#pragma config EBTR0 = OFF, EBTR1 = OFF, EBTR2 = OFF, EBTR3 = OFF
#pragma config EBTRB = OFF

/*___________Bootloader ende____________*/

/*_______________define_________________*/
#define RS485_SENDEN_RE		LATDbits.LATD0
#define RS485_SENDEN_DE		LATDbits.LATD1

/*______________Prototypen______________*/
void isr_high_priority(void);
void init_uart(void);

/*_______Initalisierung Variablen_______*/
int i;
int x;
int buf_a;

/*____________Hauptprogramm_____________*/
void main (void)
{
	pic_init ();
	init_uart ();
	RS485_SENDEN_RE = 0;
	RS485_SENDEN_DE = 0;
	for (;;) 						// In dieser Schleife hält sich das Programm
	{
	

	buf_a = RCREG;					// Wert aus RCREG in buf_a schreiben
	while (PIR1bits.RCIF==0);		// Warten bis RCREG leer


		if(buf_a = 'k')
		{
		
			LATDbits.LATD6=~0;		//LATD6 LED grün (an)

		}
	
		else
		{

			LATDbits.LATD6=~1;		//LATD6 LED grün (aus)

		}


		INTCONbits.TMR0IF = 0;		//setzt interuptflag von Timer0 zurück auf 0
		TMR0H = 0x00;				//setzt Timer0 auf 0
		TMR0L = 0x00;				//setzt Timer0 auf 0
		T0CONbits.TMR0ON=1;			//startet Timer0
		while(INTCONbits.TMR0IF==0);//Wartet auf IF von Timer0
		T0CONbits.TMR0ON=0;			//stoppt Timer0

		
			
	}

	
}








//MASTER  (Initalisierung ist gleich!!!)


//Main Master:

//______________________________________________________________________



#include <p18cxxx.h>
#include "pic_init.h"


/*_____________Bootloader______________*/
#pragma config OSC = HSPLL
#pragma config FCMEN = OFF 
#pragma config IESO = OFF 
#pragma config PWRT = ON
#pragma config WDT = OFF, WDTPS = 128
#pragma config CCP2MX = PORTC, PBADEN = OFF, LPT1OSC =OFF, MCLRE = OFF
#pragma config STVREN = ON, LVP = OFF, XINST = OFF, DEBUG = OFF
#pragma config CP0 = OFF, CP1 = OFF, CP2 = OFF, CP3 = OFF
#pragma config CPB = OFF, CPD = OFF
#pragma config WRT0 = OFF, WRT1 = OFF, WRT2 = OFF, WRT3 = OFF
#pragma config WRTC = ON, WRTB = OFF, WRTD = OFF
#pragma config EBTR0 = OFF, EBTR1 = OFF, EBTR2 = OFF, EBTR3 = OFF
#pragma config EBTRB = OFF

/*___________Bootloader ende____________*/



/*_______________define_________________*/
#define RS485_SENDEN_RE		LATDbits.LATD0
#define RS485_SENDEN_DE		LATDbits.LATD1

volatile int send_buf1;

/*______________Prototypen______________*/
void isr_high_priority(void);
void init_uart(void);


/*_______Initalisierung Variablen_______*/
int i;
int x;
unsigned int send_buf[2];


/*____________Hauptprogramm_____________*/
void main (void)
{
	pic_init ();
	init_uart ();
	LATDbits.LATD6=~0; 								 //PORTD mit der Variable x gleichsetzen
	RS485_SENDEN_RE = 1;
	RS485_SENDEN_DE = 1;

	for (;;)
	{
	

/*______________RS-485 SEND______________*/
		//	send_buf[0]=0x02;			 //START ROUTINE (STX)
		//	send_buf[1]=0b00011000;	 	 //Bits Senden
		//	send_buf[2]=0b00100100;	     //Bits Senden 
		//	send_buf[3]=0b00011000;	 	 //Bits Senden
		//	send_buf[4]=0b00000000;		 //Checksumme High-Byte
		//	send_buf[5]=0b00001000;		 //Checksumme Low-Byte
		//	send_buf[6]=0x0d;			 //END ROUTINE (ETX)


/*_________MAX3082 TRANSMITTING__________*/
		//RS485_SENDEN_RE = 0;
		//RS485_SENDEN_DE = 1;

/*___________Warte auf MAX3082___________*/
		//for(i=0;i < 1000; i++);			

/*___________Senden___________*/
i=0;
		for(i=0;i<=0;i++)
		{
			PIR1bits.TXIF=0;


			TXREG = 'k';
//					  xxxxxxxx-	Send Bits
//                    --------x parity bit

			//TXREG = send_buf[i];
			while (PIR1bits.TXIF==0);
		}

	
		INTCONbits.TMR0IF = 0;		//setzt interuptflag von Timer0 zurück auf 0
		TMR0H = 0x00;				//setzt Timer0 auf 0
		TMR0L = 0x00;				//setzt Timer0 auf 0
		T0CONbits.TMR0ON=1;
		while(INTCONbits.TMR0IF==0);
		T0CONbits.TMR0ON=0;
		


/*___________Senden ende___________*/
/*_____________MAX RECIEVING_____________*/
		/*
		Nop();Nop();Nop();
		while (!PIR1bits.TXIF);
		for(i=0; i< 2000; i++)
		{
			RS485_SENDEN_RE = 1;
			RS485_SENDEN_DE = 0;
		}
		*/


		
			
	}

	
}