--- trunk/Embedded/main.c	2007/11/28 17:00:45	82
+++ trunk/Embedded/main.c	2007/12/06 14:19:51	178
@@ -1,57 +1,535 @@
 #include <pic18.h>
 #include <stdio.h>
+#include <htc.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "lcd.h"
+#include "Delay.h"
+// Delay.h is included inside lcd.c
 
+#define BUFFER 128
+#define PWRFAIL RB1
+#define FIREDET RB2
+#define FEEDING RB3
+#define EMPTYTANK RB4
 
-void rs232_init(void)
+
+unsigned char global_Pot_Hi, global_Pot_Lo;
+unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
+bit global_recieve_done = 0, global_interval_changed = 0;
+unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0,  global_time_counter_image = 0;
+unsigned int global_emergency_counter = 600, global_time_interval = 3600;
+unsigned char global_temp = 0;
+
+unsigned int global_temp_update_display = 0;
+
+unsigned char global_message_buffer1[BUFFER];
+unsigned char global_message_buffer2[BUFFER];
+unsigned char global_message_buffer_length1;
+unsigned char global_message_buffer_length2;
+
+unsigned char global_lcd_buf[16];
+
+unsigned int global_imei_tversum;
+
+unsigned char global_cell_nr[15] = ""; // = "21681784";
+bit global_modem_init = 0;
+bit global_has_imei = 0;
+
+unsigned char global_sms_recieve_number[3];
+
+__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
+__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
+
+
+void serial_recieved(void);
+void serial_send(void);
+void update_lcd(void);
+void convertTemp(void);
+void timer1_interrupt(void);
+void on_recieve(void);
+void on_initial_recieve(void);
+void sms_recieved(void);
+void send_sms(const unsigned char* payload);
+void eeprom_writer(void);
+
+
+void reset_recieve_buffer(void)
 {
-	SPEN	= 0;	// Serial Port Enable Bit... 0 = disabled
-	TRISC6	= 0;
-	TRISC7	= 1;
-	SYNC	= 0; // SYNC switches between async(0) and sync(1) mode.
-	SPBRG	= 25;
-	TXSTA	= 0x24;
-	RCSTA	= 0x90;
-	SPEN	= 1;
+	global_recieve_done = 0;
+	
+	global_message_buffer_length1 = 0;
+	//global_message_buffer1[0] = 0;	
+	global_message_buffer_length2 = 0;
+	//global_message_buffer2[0] = 0;	
+	
+	memset(global_message_buffer1, 0, BUFFER);
+	memset(global_message_buffer2, 0, BUFFER);
+}	
+//////////  INITS  //////////
+void pic18_io_init(void)
+{
+	TRISA0	= 1;	// analog input
+	TRISA5	= 0;	// Output
+	TRISB1	= 1;	// TRISB1-4 Digital input
+	TRISB2	= 1;
+	TRISB3	= 1;
+	TRISB4	= 1;
+}
+
+
+
+void ad_init(void) // Nicked from H7
+{
+	// 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;
+	
+	//Reset the A/D result registers
+	ADRESH = 0;
+	ADRESL = 0;
+	
+	//Result is right justified
+	ADFM=1; 
+	
+	//Fire up for A/D converter module
+	ADON=1;
 }
 
+
+
 void interrupt_init(void)
 {
 	// Assumes that all interrupts default is 0
 	PEIE	= 1;
 	GIE		= 1;
-	RCIE	= 1;
+	RCIE	= 1;	// Recieve interrupt enable.
+	IPEN	= 0;	// Nfo interrupt priority
+	TXIE	= 0;	// Serial interrupt enabled
+	TMR1IE	= 1;	// Enables timer 1
 }	
 
-void pic18_io_init(void)
+
+
+void timer_init(void)
 {
-	TRISA0	= 1;
-	TRISB1	= 1;
-	TRISB2	= 1;
-	TRISB3	= 1;
-	TRISB4	= 1;
-}	
+	TMR1CS = 1; //use external clock
+	
+	T1CKPS1 = 1; //1:8 prescale
+	T1CKPS0 = 1;
+	
+	TMR1H = 0xEF;
+	TMR1L = 0xFF;
+
+	T1OSCEN = 1; //enable oscillator circuit	
+	RD16 = 0; //normal 8 bit writes
+	TMR1ON = 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 sms_init(void)
+{
+	int i;
+	char buf[2];
+	
+	while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ;	// Waiting for the modem to be ready
+
+	reset_recieve_buffer();
+	sprintf(global_serial_send,"at+cgsn\r");
+	serial_send();
+	
+	while (global_has_imei == 0)
+	{
+		if (strstr(global_message_buffer1,"OK") != 0)
+		{
+			global_imei_tversum = 0;
+			for (i=0; i<15; ++i)
+			{
+				buf[0] = global_message_buffer2[i];
+				buf[1] = 0;
+				global_imei_tversum += atoi(buf);
+			}
+			
+			global_has_imei = 1;
+		}
+	}
+
+	sprintf(global_serial_send,"%s", "at+cpin?\r");
+	serial_send();
+	DelayMs(100);		// Delay to give the modem a chance to answer.
+	
+	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
+	{
+		sprintf(global_serial_send,"%s", "at+cpin=8043\r");
+		serial_send();
+		
+		while(global_modem_init == 0)
+		{
+			on_initial_recieve();
+		}
+	}
+	reset_recieve_buffer();
+	sprintf(global_serial_send, "at+cmgd=1,4\r");
+	serial_send();
+	while ( strstr(global_message_buffer1,"OK") == 0) ;
+}
+
+void serial_send(void)
+{
+	int i;
+	char data_byte;
+	for(i = 0; i < BUFFER; i++)
+	{
+		data_byte = global_serial_send[i];
+		if( data_byte == '\r')
+			i = (BUFFER - 1);
+		TXREG = data_byte;
+		while(TRMT==0) ;
+		DelayMs(10);
+	}
+	DelayMs(150);
+	global_serial_send[0] = 0;
+	DelayMs(150);
+}
 
-void interrupt_recieve_handler(void)
+void on_initial_recieve(void)
 {
-	// Handle recieve inputs...
+	char imei[16];
+	char* ptr;
+	char i;
+	char buf[2];
+	
+	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
+	{
+		global_modem_init = 1;
+
+		ptr = strstr(global_serial_recieve_buffer,"cgsn");
+		ptr +=4;
+		strncpy(imei, ptr,15);
+		imei[15] = 0;
+		
+		reset_recieve_buffer();
+	}
 }
 
+//////////  INTERRUPT HANDLER  //////////
 void interrupt interrupt_handler(void)
-// Finds out what interrupt have been trigged, and starts the respective function.
 {
-	if(RCIF == 1)
+	// Finds out what interrupt have been trigged, and starts the respective function.
+	if(RCIF == 1)			// Serial recieve interrupt
 	{
-		interrupt_recieve_handler();
+		serial_recieved();
 		RCIF = 0;
 	}
+	
+	if(TMR1IF == 1)			// timer1 interrupt trigger.
+	{
+		timer1_interrupt();
+		TMR1IF = 0;
+	}
 }		
+
+//////////  INTERRUPT TRIGGED //////////
+void serial_recieved(void) 
+{
+	char data_byte;
 	
+	data_byte = RCREG;
+	
+	if (data_byte == '\n')		// Cant be bothered to do anyting if the byte is a '\n'.
+		return;
+		
+	if (global_serial_byte_counter == 0 && data_byte == '\r')	// don't care about '\r', if it's the first byte we recieve.
+		return;
+
+
+	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
+		global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte;	// fills the data_byte into our buffer.
+	else
+	{
+		global_serial_recieve_buffer[0] = 0;
+		global_serial_byte_counter = 0;
+		return;
+	}
+	
+	
+	if (data_byte == '\r')	// when we meet a '\r', the transmission is done, and we fill the constxt of 
+							// global_message_buffer1 into global_message_buffer2 our main buffer into
+							// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
+							// into global_message_buffer1.
+	{
+		global_recieve_done = 1; // indicates the recieve transmission is done.
+		global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
+		
+		// global_message_buffer1 -> global_message_buffer2
+		strcpy(global_message_buffer2, global_message_buffer1);
+		global_message_buffer_length2 = global_message_buffer_length1;
+		
+		// global_serial_recieve_buffer -> global_message_buffer1
+		strcpy(global_message_buffer1, global_serial_recieve_buffer);
+		global_message_buffer_length1 = global_serial_byte_counter;
+		
+		
+		global_serial_byte_counter = 0;
+	}	
+}
+
+void timer1_interrupt(void)
+{
+	TMR1H = 0xEF;
+	TMR1L = 0xFF;
+	global_time_counter++;
+	global_emergency_counter++;
+	RA1 = !RA1;
+}
+//////////  ORDENARY FUNKTIONS  //////////
+void update_lcd(void)
+{
+	if(global_temp_update_display != global_time_counter)
+	{
+	//	lcd_clear();
+		lcd_goto(0x00);
+	
+		sprintf(global_lcd_buf, "Temp: %3d", global_temp);
+		lcd_puts(global_lcd_buf);
+		global_temp_update_display = global_time_counter;
+	}
+
+}
+	
+void send_update(void)
+{
+	char update[40];
+	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
+	send_sms(update);
+
+	global_sms_counter++;
+}	
+
+void send_sms(const unsigned char* payload)
+{
+	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
+	serial_send();
+	sprintf(global_serial_send, "%s%c", payload, 0x1A);
+	serial_send();
+	DelayMs(150);
+	if(global_sms_counter % 4 == 0)
+	{
+		eeprom_writer();
+		sprintf(global_serial_send, "at+cmgd=1,3\r");
+		serial_send();
+		while ( strstr(global_message_buffer1,"OK") == 0) ;
+	}
+}	
+
+void convert_temp()
+{
+	short adVal;
+	adVal = (global_Pot_Hi << 8) | global_Pot_Lo;
+	if( adVal >=840 )
+		global_temp = 100;
+	else
+		global_temp = (unsigned char) (adVal / 8.3886);
+}
+
+
+
+void eeprom_writer(void)
+{
+	char len,i;
+	
+	len = strlen(global_cell_nr);
+	eeprom_write(0, (global_time_interval/60));
+	eeprom_write(1, global_sms_counter>>8);
+	eeprom_write(2, global_sms_counter);
+	eeprom_write(3, len);
+	
+	for (i=0; i<len; ++i)
+	{
+		eeprom_write(i+4, global_cell_nr[i] );
+	}
+}
+
+void eeprom_reader(void)
+{
+	char len,i;
+	
+	global_time_interval = eeprom_read(0);
+	global_time_interval *= 60;
+	global_sms_counter = (eeprom_read(1)<<8) | eeprom_read(2);
+	len = eeprom_read(3);
+	
+	for (i=0; i<len; ++i)
+	{
+		global_cell_nr[i] = eeprom_read(i+4);
+	}
+	
+	global_cell_nr[i] = 0; //zero terminated!
+}	
+
+
+void on_recieve(void)
+{
+	char tmp[3];
+	char* ptr;
+	tmp[0]=0;
+		
+	if (global_recieve_done == 0 || global_message_buffer_length1 == 0)
+		return;
+
+	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
+	{
+		ptr = strstr(global_message_buffer1,",");	// finds the point just before the nr. of the SMS.
+		strcat(tmp,ptr+1);							// puts that number in tmp
+		global_sms_recieve_number[0] = 0;			// wanna be sure that we write the new number from global_sms_recieve_number[0]
+		strcat(global_sms_recieve_number, tmp);		// puts the sms number into the global variable.
+		sms_recieved();
+	}	
+	reset_recieve_buffer();
+}
+
+void sms_recieved(void)
+{
+	char buf[4];
+	char i,imei;
+	char pos;
+	
+	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number);	// formates the variable that sends commands to the SMS modem.
+	serial_send();		// Sends the command.
+	
+	while(strstr(global_message_buffer1, "OK")  == 0)	// stays here until we recieve a "OK" from the modem.
+		DelayMs(1);
+
+	DelayUs(10);
+	
+	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
+	{
+		buf[i] = global_message_buffer2[i];
+	}
+	
+	buf[i] = 0;
+	imei = atoi(buf);
+	
+	if (imei == global_imei_tversum)
+	{
+		i++; //spring over ':'
+		pos = 0;
+		for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
+		{
+			global_cell_nr[pos] = global_message_buffer2[i];
+		}
+		global_cell_nr[pos] = 0; //zero terminator
+		
+		i++; //spring over ':'
+		pos=0;
+		for ( ; global_message_buffer2[i] ; ++i,++pos)
+		{
+			buf[pos] = global_message_buffer2[i];
+		}
+		buf[pos]=0;
+		
+		global_time_interval = atoi(buf);
+		global_time_interval *= 60;
+		eeprom_writer();			// writes the new cell nr. and time interval to the eeprom.
+		send_sms("conf ok");
+	}
+	
+
+}
+
+void Delay(int time)
+{
+	int wanted = (global_time_counter + time) % global_time_interval;
+	
+	while (global_time_counter < wanted) ;
+}
 
 void main()
 {
-	rs232_init();
+////////////////////
+// Running Init's //
+
+	// Running init for various components.
 	pic18_io_init();
+	RA5 = 1;			// Indicates that the board is running inits.
+	
+	rs232_init();
+	ad_init();
+	lcd_init(0);
+	lcd_clear();
+	lcd_home();
+	interrupt_init();
+	timer_init();
+	sms_init();
+	eeprom_reader();
+///////////////
+// Main loop //
+
+	DelayMs(50);
+	reset_recieve_buffer();
+
+	RA5 = 0;			// Inits are done, and RA1 will now work as a error notifier.
+
+	while(1)
+	{
+	// If there happends to be a critical state on the system, we send a sms.
+		if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING ==1 ) && global_emergency_counter >= 600 )
+		{
+			send_update();
+			global_emergency_counter = 0;
+		}
+		
+	// Every X sec. a status sms is send.
+		if(global_time_counter >= global_time_interval)
+		{
+			send_update();
+			global_time_counter = 0;
+		}
+	// To avoid buffer overrun.
+		if( global_emergency_counter > 7200 )
+			global_emergency_counter = 600;
+
+	// Checks if there has been recieved a config sms.
+		if(global_interval_changed )
+		{
+			eeprom_writer();
+			global_interval_changed = 0;
+		}
+	// 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;
+			convert_temp();
+			update_lcd();
+			GODONE = 1;
+		}
+	// Handels the recieve sms'es.
+		on_recieve();
+	}
 }