trunk/Embedded/main.c

#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 LCD_LENGTH 16
#define LCD_ROWS 2
#define BUFFER 128
#define PWRFAIL RB1
#define FIREDET RB2
#define FEEDING RB3
#define EMPTYTANK RB4


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;
unsigned int global_emergency_counter = 600, global_time_interval = 3600;
unsigned char global_temp = 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 short 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(unsigned char* payload);


void reset_recieve_buffer(void)
{
        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);
}       

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;
        
        //Result is right justified
        ADFM=1; 
        
        //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
        TMR1IE  = 1;    // Enables timer 1
}       

void timer_init(void)
{
        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 sms_init(void)
{
        int i;
        char buf[2];


        reset_recieve_buffer();
        sprintf(global_serial_send,"at+cgsn\r");
        serial_send();
        DelaySek(1);
        //while(!global_recieve_done) ;
        
        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_imei_tversum += (global_message_buffer2[i] - '0');
                        }
                        
                        global_has_imei = 1;
                }
        }


        sprintf(global_serial_send,"%s", "at+cpin=8043\r");
        serial_send();
        
        while(global_modem_init == 0)
        {
                on_initial_recieve();
        }
        DelayMs(5);
        
        reset_recieve_buffer();
        sprintf(global_serial_send, "at+cmgd=1,4\r");
        serial_send();
        while ( strstr(global_message_buffer1,"OK") == 0) ;
}


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;
        }
        
        if(TMR1IF == 1)                 // timer1 interrupt trigger.
        {
                timer1_interrupt();
                TMR1IF = 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(250);
        global_serial_send[0] = 0;
        DelayMs(250);
}       

///////////////////////////////////////////////////////////////////////////////////////////////////
// Takes the recieving data and fills it in a buffer, when we meet a '\r' we fill the data from,
// global_serial_recieve_buffer, to global_message_buffer1, and sets the flag global_recieve_done.
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.

        
        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;
}

void update_lcd(void)
{
        lcd_clear();
        lcd_goto(0x00);
        
        sprintf(global_lcd_buf, "Temp: %d", global_temp);
        lcd_puts(global_lcd_buf);

}
        
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(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(250);
        
}       

void convertTemp()
{
        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_initial_recieve(void)
{
        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();
        }
}

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 main()
{
////////////////////
// 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);
        interrupt_init();
        sms_init();
        //eeprom_init();
        timer_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 || EMPTYTANK == 1) && global_emergency_counter >= 600 )
                {
                        send_update();
                        global_emergency_counter = 0;
                }
        // Every X sec. a status sms is send.
                if(global_time_counter >= 3600)
                {
                        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;
                        convertTemp();
                        if (global_time_counter % 5 == 0)
                                update_lcd();
                        GODONE = 1;
                }
        // Handels the recieve sms'es.
                on_recieve();
        }
}
1	#include <pic18.h>
2	#include <stdio.h>
3	#include <htc.h>
4	#include <string.h>
5	#include <stdlib.h>
6
7	#include "lcd.h"
8	#include "Delay.h"
9	// Delay.h is included inside lcd.c
10
11	#define LCD_LENGTH 16
12	#define LCD_ROWS 2
13	#define BUFFER 128
14	#define PWRFAIL RB1
15	#define FIREDET RB2
16	#define FEEDING RB3
17	#define EMPTYTANK RB4
18
19
20	unsigned char global_Pot_Hi, global_Pot_Lo;
21	unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
22	bit global_recieve_done = 0, global_interval_changed = 0;
23	unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0;
24	unsigned int global_emergency_counter = 600, global_time_interval = 3600;
25	unsigned char global_temp = 0;
26
27	unsigned char global_message_buffer1[BUFFER];
28	unsigned char global_message_buffer2[BUFFER];
29	unsigned char global_message_buffer_length1;
30	unsigned char global_message_buffer_length2;
31
32	unsigned char global_lcd_buf[16];
33
34	unsigned short global_imei_tversum;
35
36	unsigned char global_cell_nr[15] = ""; // = "21681784";
37	bit global_modem_init = 0;
38	bit global_has_imei = 0;
39
40	unsigned char global_sms_recieve_number[3];
41
42	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
43	__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
44
45	void serial_recieved(void);
46	void serial_send(void);
47	void update_lcd(void);
48	void convertTemp(void);
49	void timer1_interrupt(void);
50	void on_recieve(void);
51	void on_initial_recieve(void);
52	void sms_recieved(void);
53	void send_sms(unsigned char* payload);
54
55
56	void reset_recieve_buffer(void)
57	{
58	global_recieve_done = 0;
59
60	global_message_buffer_length1 = 0;
61	//global_message_buffer1[0] = 0;
62	global_message_buffer_length2 = 0;
63	//global_message_buffer2[0] = 0;
64
65	memset(global_message_buffer1, 0, BUFFER);
66	memset(global_message_buffer2, 0, BUFFER);
67	}
68
69	void pic18_io_init(void)
70	{
71	TRISA0 = 1; // analog input
72	TRISA5 = 0; // Output
73	TRISB1 = 1; // TRISB1-4 Digital input
74	TRISB2 = 1;
75	TRISB3 = 1;
76	TRISB4 = 1;
77	}
78
79
80
81	void ad_init(void) // Nicked from H7
82	{
83	// AD Conversion clock
84	ADCS0 = 0;
85	ADCS1 = 0;
86	ADCS2 = 0;
87
88	//Select AN0/RA0 for AD source
89	// In this (000) setup, it's only RA0/AN0 that does ad convertion.
90	CHS0=0;
91	CHS1=0;
92	CHS2=0;
93
94	//Only AN0 is selected for AD and with Vdd/Vss as limits
95	PCFG0=0;
96	PCFG1=1;
97	PCFG2=1;
98	PCFG3=1;
99
100	//Result is right justified
101	ADFM=1;
102
103	//Fire up for A/D converter module
104	ADON=1;
105	}
106
107	void rs232_init(void)
108	{
109	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
110	TRISC6 = 0;
111	TRISC7 = 1;
112
113	SPBRG = 207; // 1200 baud rate... 25 = 9600
114	// x = (Fosc / (16*[baud rate]) )-1
115	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
116	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
117	}
118
119	void interrupt_init(void)
120	{
121	// Assumes that all interrupts default is 0
122	PEIE = 1;
123	GIE = 1;
124	RCIE = 1; // Recieve interrupt enable.
125	IPEN = 0; // Nfo interrupt priority
126	TXIE = 0; // Serial interrupt enabled
127	TMR1IE = 1; // Enables timer 1
128	}
129
130	void timer_init(void)
131	{
132	TMR1CS = 1; //use external clock
133
134	T1CKPS1 = 1; //1:8 prescale
135	T1CKPS0 = 1;
136
137	TMR1H = 0xEF;
138	TMR1L = 0xFF;
139
140	T1OSCEN = 1; //enable oscillator circuit
141	RD16 = 0; //normal 8 bit writes
142	TMR1ON = 1;
143	}
144
145	void sms_init(void)
146	{
147	int i;
148	char buf[2];
149
150
151	reset_recieve_buffer();
152	sprintf(global_serial_send,"at+cgsn\r");
153	serial_send();
154	DelaySek(1);
155	//while(!global_recieve_done) ;
156
157	while (global_has_imei == 0)
158	{
159	if (strstr(global_message_buffer1,"OK") != 0)
160	{
161	global_imei_tversum = 0;
162	for (i=0; i<15; ++i)
163	{
164	buf[0] = global_message_buffer2[i];
165	buf[1] = 0;
166	global_imei_tversum += atoi(buf);
167	//global_imei_tversum += (global_message_buffer2[i] - '0');
168	}
169
170	global_has_imei = 1;
171	}
172	}
173
174
175	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
176	serial_send();
177
178	while(global_modem_init == 0)
179	{
180	on_initial_recieve();
181	}
182	DelayMs(5);
183
184	reset_recieve_buffer();
185	sprintf(global_serial_send, "at+cmgd=1,4\r");
186	serial_send();
187	while ( strstr(global_message_buffer1,"OK") == 0) ;
188	}
189
190
191	void interrupt interrupt_handler(void)
192	{
193	// Finds out what interrupt have been trigged, and starts the respective function.
194	if(RCIF == 1) // Serial recieve interrupt
195	{
196	serial_recieved();
197	RCIF = 0;
198	}
199
200	if(TMR1IF == 1) // timer1 interrupt trigger.
201	{
202	timer1_interrupt();
203	TMR1IF = 0;
204	}
205	}
206
207
208	void serial_send(void)
209	{
210	int i;
211	char data_byte;
212	for(i = 0; i < BUFFER; i++)
213	{
214	data_byte = global_serial_send[i];
215	if( data_byte == '\r')
216	i = (BUFFER - 1);
217	TXREG = data_byte;
218	while(TRMT==0) ;
219	DelayMs(10);
220	}
221	DelayMs(250);
222	global_serial_send[0] = 0;
223	DelayMs(250);
224	}
225
226	///////////////////////////////////////////////////////////////////////////////////////////////////
227	// Takes the recieving data and fills it in a buffer, when we meet a '\r' we fill the data from,
228	// global_serial_recieve_buffer, to global_message_buffer1, and sets the flag global_recieve_done.
229	void serial_recieved(void)
230	{
231	char data_byte;
232
233	data_byte = RCREG;
234
235	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
236	return;
237
238	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
239	return;
240
241
242	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
243	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
244
245
246
247	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
248	// global_message_buffer1 into global_message_buffer2 our main buffer into
249	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
250	// into global_message_buffer1.
251	{
252	global_recieve_done = 1; // indicates the recieve transmission is done.
253	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
254
255	// global_message_buffer1 -> global_message_buffer2
256	strcpy(global_message_buffer2, global_message_buffer1);
257	global_message_buffer_length2 = global_message_buffer_length1;
258
259	// global_serial_recieve_buffer -> global_message_buffer1
260	strcpy(global_message_buffer1, global_serial_recieve_buffer);
261	global_message_buffer_length1 = global_serial_byte_counter;
262
263
264	global_serial_byte_counter = 0;
265	}
266	}
267
268	void timer1_interrupt(void)
269	{
270	TMR1H = 0xEF;
271	TMR1L = 0xFF;
272	global_time_counter++;
273	global_emergency_counter++;
274	RA1 = !RA1;
275	}
276
277	void update_lcd(void)
278	{
279	lcd_clear();
280	lcd_goto(0x00);
281
282	sprintf(global_lcd_buf, "Temp: %d", global_temp);
283	lcd_puts(global_lcd_buf);
284
285	}
286
287	void send_update(void)
288	{
289	char update[40];
290	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
291	send_sms(update);
292
293	global_sms_counter++;
294	}
295
296	void send_sms(unsigned char* payload)
297	{
298	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
299	serial_send();
300	sprintf(global_serial_send, "%s%c", payload, 0x1A);
301	serial_send();
302	DelayMs(250);
303
304	}
305
306	void convertTemp()
307	{
308	short adVal;
309	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
310	if( adVal >=840 )
311	global_temp = 100;
312	else
313	global_temp = (unsigned char) (adVal / 8.3886);
314	}
315
316
317
318	void eeprom_writer(void)
319	{
320	char len,i;
321
322	len = strlen(global_cell_nr);
323	eeprom_write(0, (global_time_interval/60));
324	eeprom_write(1, global_sms_counter>>8);
325	eeprom_write(2, global_sms_counter);
326	eeprom_write(3, len);
327
328	for (i=0; i<len; ++i)
329	{
330	eeprom_write(i+4, global_cell_nr[i] );
331	}
332	}
333
334	void eeprom_reader(void)
335	{
336	char len,i;
337
338	global_time_interval = eeprom_read(0);
339	global_time_interval *= 60;
340	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
341	len = eeprom_read(3);
342
343	for (i=0; i<len; ++i)
344	{
345	global_cell_nr[i] = eeprom_read(i+4);
346	}
347
348	global_cell_nr[i] = 0; //zero terminated!
349	}
350
351	void on_initial_recieve(void)
352	{
353	char imei[16];
354	char* ptr;
355	char i;
356	char buf[2];
357
358	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
359	{
360	global_modem_init = 1;
361
362	ptr = strstr(global_serial_recieve_buffer,"cgsn");
363	ptr +=4;
364	strncpy(imei, ptr,15);
365	imei[15] = 0;
366
367	reset_recieve_buffer();
368	}
369	}
370
371	void on_recieve(void)
372	{
373	char tmp[3];
374	char* ptr;
375	tmp[0]=0;
376
377	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
378	return;
379
380	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
381	{
382	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
383	strcat(tmp,ptr+1); // puts that number in tmp
384	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
385	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
386	sms_recieved();
387	}
388	reset_recieve_buffer();
389	}
390
391	void sms_recieved(void)
392	{
393	char buf[4];
394	char i,imei;
395	char pos;
396
397	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
398	serial_send(); // Sends the command.
399
400	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
401	DelayMs(1);
402
403	DelayUs(10);
404
405	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
406	{
407	buf[i] = global_message_buffer2[i];
408	}
409
410	buf[i] = 0;
411	imei = atoi(buf);
412
413	if (imei == global_imei_tversum)
414	{
415	i++; //spring over ':'
416	pos = 0;
417	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
418	{
419	global_cell_nr[pos] = global_message_buffer2[i];
420	}
421	global_cell_nr[pos] = 0; //zero terminator
422
423	i++; //spring over ':'
424	pos=0;
425	for ( ; global_message_buffer2[i] ; ++i,++pos)
426	{
427	buf[pos] = global_message_buffer2[i];
428	}
429	buf[pos]=0;
430
431	global_time_interval = atoi(buf);
432	global_time_interval *= 60;
433	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
434	send_sms("conf ok");
435	}
436
437
438	}
439
440
441
442	void main()
443	{
444	////////////////////
445	// Running Init's //
446
447	// Running init for various components.
448	pic18_io_init();
449	RA5 = 1; // Indicates that the board is running inits.
450
451	rs232_init();
452	ad_init();
453	lcd_init(0);
454	interrupt_init();
455	sms_init();
456	//eeprom_init();
457	timer_init();
458	eeprom_reader();
459	///////////////
460	// Main loop //
461
462	DelayMs(50);
463	reset_recieve_buffer();
464
465	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
466
467	while(1)
468	{
469	// If there happends to be a critical state on the system, we send a sms.
470	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING == 1 \|\| EMPTYTANK == 1) && global_emergency_counter >= 600 )
471	{
472	send_update();
473	global_emergency_counter = 0;
474	}
475	// Every X sec. a status sms is send.
476	if(global_time_counter >= 3600)
477	{
478	send_update();
479	global_time_counter = 0;
480	}
481	// To avoid buffer overrun.
482	if( global_emergency_counter > 7200 )
483	global_emergency_counter = 600;
484
485	// Checks if there has been recieved a config sms.
486	if(global_interval_changed )
487	{
488	eeprom_writer();
489	global_interval_changed = 0;
490	}
491	// Checking if A/D convertion is done, and save the data in global_Pot_??
492	if(GODONE==0)
493	{
494	global_Pot_Hi = ADRESH;
495	global_Pot_Lo = ADRESL;
496	convertTemp();
497	if (global_time_counter % 5 == 0)
498	update_lcd();
499	GODONE = 1;
500	}
501	// Handels the recieve sms'es.
502	on_recieve();
503	}
504	}