--- trunk/PIC/main.c	2007/01/29 15:07:29	9
+++ trunk/PIC/main.c	2007/01/29 15:29:28	10
@@ -1,13 +1,120 @@
 /* H7 -projekt opgave */
-
+
+///////////////////////////////////////////////////////////////////////
+//Includes
 #include <pic18.h>
 #include "delay.h"
 #include "i2c.h"
 #include "lcd.h"
 
-
+/////////////////////////////////////////////////////////////////////
+//Defines
 #define TC74 0x9A /* I2C TC74 IC */
 
+//////////////
+// Enums
+
+enum SlipState{
+	SlipNormal,
+	SlipEscaped,
+	SlipError,
+	SlipStopped
+};
+
+//////////////////////////////////////////////////////////////////
+//Globale data
+// Alle globale variabler bruger "global_" som prefix
+unsigned char global_comm_buffer[10]; 
+unsigned char global_comm_length;
+unsigned char global_comm_index;
+bit global_comm_ready;
+bit global_comm_recieving;
+
+unsigned char global_comm_state;
+
+
+
+///////////////////////////////////////////////////////////////////
+// Interrupt funktioner
+
+void recieve_interrupt(void)
+{
+}
+
+void transmit_interrupt(void)
+{
+}
+
+void interrupt interrupt_handler(void)
+{
+	if (RCIF == 1)
+	{
+		recieve_interrupt();
+		RCIF = 0;
+	}
+	if (TXIF == 1)
+	{
+		transmit_interrupt();
+		TXIF = 0;
+	}
+}
+
+///////////////////////////////////////////////////////////////////
+// Alm funktioner
+
+void interrupt_init(void)
+{
+	TXIE = 1; //Enable AUX TX interrupt - testes med TXIF;
+	RCIE = 1; //Enable AUX Recieve interrupt - testes med RCIF;
+
+	IPEN = 0; // IPEN=Interrupt Priority ENable bit - her bruges ingen prioritet
+	
+	PEIE = 1; // PEIE = PEriphal Interrupt Enable
+		
+	TXIF = 0; //nulstil intterupt flag
+	RCIF = 0;
+
+	GIE = 1; //Global interrupt enable bit
+}
+
+void serial_init(void)
+{
+	SPEN = 0; //Make sure serial port is disabled
+	
+	// snupset fra  Kim H Pedersens serialmain.c 
+	// Set Port C bit 6 output (TxD) and bit 7 input (RxD)
+    TRISC6 = 0;
+    TRISC7 = 1;
+
+    SPBRG = 25;		//	x = Fosc/(16 * Baud Rate) - 1
+					//	x = 4000000/(16 * 9600) - 1
+					//	x = 25.0417 ~ 25
+					//	Baud Rate = Fosc/(16 * (x+1))
+					//	Baud Rate = 4000000/(16 * (25+1))
+					//	Baud Rate = 9615
+    TXSTA = 0x24;	//	TXSTA7 = 0	Don't care in asynchronous
+					//	TXSTA6 = 0	8-bit transmission
+					//	TXSTA5 = 1	Transmit enabled
+					//	TXSTA4 = 0	Asynchronous mode
+					//	TXSTA3 = 0	Unimplemented
+					//	TXSTA2 = 1	High speed
+					//	TXSTA1 = 0	TSR empty
+					//	TXSTA0 = 0	9th bit						*/
+    RCSTA = 0x90;	//	RCSTA7 = 0	Serial port disabled
+					//	RCSTA6 = 0	8-bit reception
+					//	RCSTA5 = 0	Don't care in asynchronous
+					//	RCSTA4 = 1	Receiver enabled
+					//	RCSTA3 = 0	Don't care (8-bit operation)
+					//	RCSTA2 = 0	No framing error
+					//	RCSTA1 = 0	Overrun error bit
+					//	RCSTA0 = 0	9th bit						*/
+					
+	//config completed
+	SPEN = 1; //Enable Serial port
+}
+
+
+
 void i2c_init(void)
 {
 #ifdef I2C_MODULE
@@ -22,21 +129,40 @@
 #endif
 }
 
+
+
 char ReadTemp(void)
 {
 	char temp;
-	i2c_WriteTo(TC74);
+	i2c_WriteTo(TC74); //write to, will automatically send a start condition
 	i2c_PutByte(0x00); //tell TC74 we want to read
 	i2c_ReadFrom(TC74);
 	temp = i2c_GetByte(I2C_LAST);
 	i2c_Stop(); //assert a stop condition on SDA & SCL
 	return temp;
-}
+}
+
+
+///////////////////////////////////////////////////////////////////
+//Main
+
 
 void main(void) 
 {
 	lcd_init(0); //init in 4-bit mode
 	i2c_init();
+	serial_init(); //9600 8N1
+	
+	interrupt_init();
+	
+	global_comm_length = 0;
+	global_comm_ready = 0;
+
+
+	global_comm_state = SlipNormal;
+	
+//	initialisation completed and we are ready to recieve commands - enable serial reception
+	CREN = 1;
 	
 	while (1)
 	{