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_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 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(const 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(150);
        global_serial_send[0] = 0;
        DelayMs(150);
}       

///////////////////////////////////////////////////////////////////////////////////////////////////
// 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.
        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;
}

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);
        
}       

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();
                        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_temp_update_display = 0;
28
29	unsigned char global_message_buffer1[BUFFER];
30	unsigned char global_message_buffer2[BUFFER];
31	unsigned char global_message_buffer_length1;
32	unsigned char global_message_buffer_length2;
33
34	unsigned char global_lcd_buf[16];
35
36	unsigned short global_imei_tversum;
37
38	unsigned char global_cell_nr[15] = ""; // = "21681784";
39	bit global_modem_init = 0;
40	bit global_has_imei = 0;
41
42	unsigned char global_sms_recieve_number[3];
43
44	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
45	__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
46
47	void serial_recieved(void);
48	void serial_send(void);
49	void update_lcd(void);
50	void convertTemp(void);
51	void timer1_interrupt(void);
52	void on_recieve(void);
53	void on_initial_recieve(void);
54	void sms_recieved(void);
55	void send_sms(const unsigned char* payload);
56
57
58	void reset_recieve_buffer(void)
59	{
60	global_recieve_done = 0;
61
62	global_message_buffer_length1 = 0;
63	//global_message_buffer1[0] = 0;
64	global_message_buffer_length2 = 0;
65	//global_message_buffer2[0] = 0;
66
67	memset(global_message_buffer1, 0, BUFFER);
68	memset(global_message_buffer2, 0, BUFFER);
69	}
70
71	void pic18_io_init(void)
72	{
73	TRISA0 = 1; // analog input
74	TRISA5 = 0; // Output
75	TRISB1 = 1; // TRISB1-4 Digital input
76	TRISB2 = 1;
77	TRISB3 = 1;
78	TRISB4 = 1;
79	}
80
81
82
83	void ad_init(void) // Nicked from H7
84	{
85	// AD Conversion clock
86	ADCS0 = 0;
87	ADCS1 = 0;
88	ADCS2 = 0;
89
90	//Select AN0/RA0 for AD source
91	// In this (000) setup, it's only RA0/AN0 that does ad convertion.
92	CHS0=0;
93	CHS1=0;
94	CHS2=0;
95
96	//Only AN0 is selected for AD and with Vdd/Vss as limits
97	PCFG0=0;
98	PCFG1=1;
99	PCFG2=1;
100	PCFG3=1;
101
102	//Result is right justified
103	ADFM=1;
104
105	//Fire up for A/D converter module
106	ADON=1;
107	}
108
109	void rs232_init(void)
110	{
111	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
112	TRISC6 = 0;
113	TRISC7 = 1;
114
115	SPBRG = 207; // 1200 baud rate... 25 = 9600
116	// x = (Fosc / (16*[baud rate]) )-1
117	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
118	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
119	}
120
121	void interrupt_init(void)
122	{
123	// Assumes that all interrupts default is 0
124	PEIE = 1;
125	GIE = 1;
126	RCIE = 1; // Recieve interrupt enable.
127	IPEN = 0; // Nfo interrupt priority
128	TXIE = 0; // Serial interrupt enabled
129	TMR1IE = 1; // Enables timer 1
130	}
131
132	void timer_init(void)
133	{
134	TMR1CS = 1; //use external clock
135
136	T1CKPS1 = 1; //1:8 prescale
137	T1CKPS0 = 1;
138
139	TMR1H = 0xEF;
140	TMR1L = 0xFF;
141
142	T1OSCEN = 1; //enable oscillator circuit
143	RD16 = 0; //normal 8 bit writes
144	TMR1ON = 1;
145	}
146
147	void sms_init(void)
148	{
149	int i;
150	char buf[2];
151
152
153	reset_recieve_buffer();
154	sprintf(global_serial_send,"at+cgsn\r");
155	serial_send();
156	DelaySek(1);
157	//while(!global_recieve_done) ;
158
159	while (global_has_imei == 0)
160	{
161	if (strstr(global_message_buffer1,"OK") != 0)
162	{
163	global_imei_tversum = 0;
164	for (i=0; i<15; ++i)
165	{
166	buf[0] = global_message_buffer2[i];
167	buf[1] = 0;
168	global_imei_tversum += atoi(buf);
169	//global_imei_tversum += (global_message_buffer2[i] - '0');
170	}
171
172	global_has_imei = 1;
173	}
174	}
175
176
177	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
178	serial_send();
179
180	while(global_modem_init == 0)
181	{
182	on_initial_recieve();
183	}
184	DelayMs(5);
185
186	reset_recieve_buffer();
187	sprintf(global_serial_send, "at+cmgd=1,4\r");
188	serial_send();
189	while ( strstr(global_message_buffer1,"OK") == 0) ;
190	}
191
192
193	void interrupt interrupt_handler(void)
194	{
195	// Finds out what interrupt have been trigged, and starts the respective function.
196	if(RCIF == 1) // Serial recieve interrupt
197	{
198	serial_recieved();
199	RCIF = 0;
200	}
201
202	if(TMR1IF == 1) // timer1 interrupt trigger.
203	{
204	timer1_interrupt();
205	TMR1IF = 0;
206	}
207	}
208
209
210	void serial_send(void)
211	{
212	int i;
213	char data_byte;
214	for(i = 0; i < BUFFER; i++)
215	{
216	data_byte = global_serial_send[i];
217	if( data_byte == '\r')
218	i = (BUFFER - 1);
219	TXREG = data_byte;
220	while(TRMT==0) ;
221	DelayMs(10);
222	}
223	DelayMs(150);
224	global_serial_send[0] = 0;
225	DelayMs(150);
226	}
227
228	///////////////////////////////////////////////////////////////////////////////////////////////////
229	// Takes the recieving data and fills it in a buffer, when we meet a '\r' we fill the data from,
230	// global_serial_recieve_buffer, to global_message_buffer1, and sets the flag global_recieve_done.
231	void serial_recieved(void)
232	{
233	char data_byte;
234
235	data_byte = RCREG;
236
237	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
238	return;
239
240	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
241	return;
242
243
244	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
245	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
246	else
247	{
248	global_serial_recieve_buffer[0] = 0;
249	global_serial_byte_counter = 0;
250	return;
251	}
252
253
254	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
255	// global_message_buffer1 into global_message_buffer2 our main buffer into
256	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
257	// into global_message_buffer1.
258	{
259	global_recieve_done = 1; // indicates the recieve transmission is done.
260	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
261
262	// global_message_buffer1 -> global_message_buffer2
263	strcpy(global_message_buffer2, global_message_buffer1);
264	global_message_buffer_length2 = global_message_buffer_length1;
265
266	// global_serial_recieve_buffer -> global_message_buffer1
267	strcpy(global_message_buffer1, global_serial_recieve_buffer);
268	global_message_buffer_length1 = global_serial_byte_counter;
269
270
271	global_serial_byte_counter = 0;
272	}
273	}
274
275	void timer1_interrupt(void)
276	{
277	TMR1H = 0xEF;
278	TMR1L = 0xFF;
279	global_time_counter++;
280	global_emergency_counter++;
281	RA1 = !RA1;
282	}
283
284	void update_lcd(void)
285	{
286	if(global_temp_update_display != global_time_counter)
287	{
288	// lcd_clear();
289	lcd_goto(0x00);
290
291	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
292	lcd_puts(global_lcd_buf);
293	global_temp_update_display = global_time_counter;
294	}
295
296	}
297
298	void send_update(void)
299	{
300	char update[40];
301	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
302	send_sms(update);
303
304	global_sms_counter++;
305	}
306
307	void send_sms(const unsigned char* payload)
308	{
309	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
310	serial_send();
311	sprintf(global_serial_send, "%s%c", payload, 0x1A);
312	serial_send();
313	DelayMs(150);
314
315	}
316
317	void convertTemp()
318	{
319	short adVal;
320	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
321	if( adVal >=840 )
322	global_temp = 100;
323	else
324	global_temp = (unsigned char) (adVal / 8.3886);
325	}
326
327
328
329	void eeprom_writer(void)
330	{
331	char len,i;
332
333	len = strlen(global_cell_nr);
334	eeprom_write(0, (global_time_interval/60));
335	eeprom_write(1, global_sms_counter>>8);
336	eeprom_write(2, global_sms_counter);
337	eeprom_write(3, len);
338
339	for (i=0; i<len; ++i)
340	{
341	eeprom_write(i+4, global_cell_nr[i] );
342	}
343	}
344
345	void eeprom_reader(void)
346	{
347	char len,i;
348
349	global_time_interval = eeprom_read(0);
350	global_time_interval *= 60;
351	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
352	len = eeprom_read(3);
353
354	for (i=0; i<len; ++i)
355	{
356	global_cell_nr[i] = eeprom_read(i+4);
357	}
358
359	global_cell_nr[i] = 0; //zero terminated!
360	}
361
362	void on_initial_recieve(void)
363	{
364	char imei[16];
365	char* ptr;
366	char i;
367	char buf[2];
368
369	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
370	{
371	global_modem_init = 1;
372
373	ptr = strstr(global_serial_recieve_buffer,"cgsn");
374	ptr +=4;
375	strncpy(imei, ptr,15);
376	imei[15] = 0;
377
378	reset_recieve_buffer();
379	}
380	}
381
382	void on_recieve(void)
383	{
384	char tmp[3];
385	char* ptr;
386	tmp[0]=0;
387
388	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
389	return;
390
391	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
392	{
393	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
394	strcat(tmp,ptr+1); // puts that number in tmp
395	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
396	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
397	sms_recieved();
398	}
399	reset_recieve_buffer();
400	}
401
402	void sms_recieved(void)
403	{
404	char buf[4];
405	char i,imei;
406	char pos;
407
408	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
409	serial_send(); // Sends the command.
410
411	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
412	DelayMs(1);
413
414	DelayUs(10);
415
416	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
417	{
418	buf[i] = global_message_buffer2[i];
419	}
420
421	buf[i] = 0;
422	imei = atoi(buf);
423
424	if (imei == global_imei_tversum)
425	{
426	i++; //spring over ':'
427	pos = 0;
428	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
429	{
430	global_cell_nr[pos] = global_message_buffer2[i];
431	}
432	global_cell_nr[pos] = 0; //zero terminator
433
434	i++; //spring over ':'
435	pos=0;
436	for ( ; global_message_buffer2[i] ; ++i,++pos)
437	{
438	buf[pos] = global_message_buffer2[i];
439	}
440	buf[pos]=0;
441
442	global_time_interval = atoi(buf);
443	global_time_interval *= 60;
444	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
445	send_sms("conf ok");
446	}
447
448
449	}
450
451
452
453	void main()
454	{
455	////////////////////
456	// Running Init's //
457
458	// Running init for various components.
459	pic18_io_init();
460	RA5 = 1; // Indicates that the board is running inits.
461
462	rs232_init();
463	ad_init();
464	lcd_init(0);
465	interrupt_init();
466	sms_init();
467	//eeprom_init();
468	timer_init();
469	eeprom_reader();
470	///////////////
471	// Main loop //
472
473	DelayMs(50);
474	reset_recieve_buffer();
475
476	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
477
478	while(1)
479	{
480	// If there happends to be a critical state on the system, we send a sms.
481	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING == 1 \|\| EMPTYTANK == 1) && global_emergency_counter >= 600 )
482	{
483	send_update();
484	global_emergency_counter = 0;
485	}
486	// Every X sec. a status sms is send.
487	if(global_time_counter >= 3600)
488	{
489	send_update();
490	global_time_counter = 0;
491	}
492	// To avoid buffer overrun.
493	if( global_emergency_counter > 7200 )
494	global_emergency_counter = 600;
495
496	// Checks if there has been recieved a config sms.
497	if(global_interval_changed )
498	{
499	eeprom_writer();
500	global_interval_changed = 0;
501	}
502	// Checking if A/D convertion is done, and save the data in global_Pot_??
503	if(GODONE==0)
504	{
505	global_Pot_Hi = ADRESH;
506	global_Pot_Lo = ADRESL;
507	convertTemp();
508	update_lcd();
509	GODONE = 1;
510	}
511	// Handels the recieve sms'es.
512	on_recieve();
513	}
514	}