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 eeprom_writer(void);

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;
        
        //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 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];
        
        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=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);
        if(global_sms_counter % 3 == 0)
        {
                eeprom_writer();
                sprintf(global_serial_send, "at+cmgd=1,3\r");
                serial_send();
                while ( strstr(global_message_buffer1,"OK") == 0) ;
        }
}       

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();
        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 >= 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	void eeprom_writer(void);
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	//Reset the A/D result registers
103	ADRESH = 0;
104	ADRESL = 0;
105
106	//Result is right justified
107	ADFM=1;
108
109	//Fire up for A/D converter module
110	ADON=1;
111	}
112
113	void rs232_init(void)
114	{
115	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
116	TRISC6 = 0;
117	TRISC7 = 1;
118
119	SPBRG = 207; // 1200 baud rate... 25 = 9600
120	// x = (Fosc / (16*[baud rate]) )-1
121	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
122	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
123	}
124
125	void interrupt_init(void)
126	{
127	// Assumes that all interrupts default is 0
128	PEIE = 1;
129	GIE = 1;
130	RCIE = 1; // Recieve interrupt enable.
131	IPEN = 0; // Nfo interrupt priority
132	TXIE = 0; // Serial interrupt enabled
133	TMR1IE = 1; // Enables timer 1
134	}
135
136	void timer_init(void)
137	{
138	TMR1CS = 1; //use external clock
139
140	T1CKPS1 = 1; //1:8 prescale
141	T1CKPS0 = 1;
142
143	TMR1H = 0xEF;
144	TMR1L = 0xFF;
145
146	T1OSCEN = 1; //enable oscillator circuit
147	RD16 = 0; //normal 8 bit writes
148	TMR1ON = 1;
149	}
150
151	void sms_init(void)
152	{
153	int i;
154	char buf[2];
155
156	while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
157
158	reset_recieve_buffer();
159	sprintf(global_serial_send,"at+cgsn\r");
160	serial_send();
161
162	while (global_has_imei == 0)
163	{
164	if (strstr(global_message_buffer1,"OK") != 0)
165	{
166	global_imei_tversum = 0;
167	for (i=0; i<15; ++i)
168	{
169	buf[0] = global_message_buffer2[i];
170	buf[1] = 0;
171	global_imei_tversum += atoi(buf);
172	}
173
174	global_has_imei = 1;
175	}
176	}
177
178
179	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
180	serial_send();
181
182	while(global_modem_init == 0)
183	{
184	on_initial_recieve();
185	}
186	DelayMs(5);
187
188	reset_recieve_buffer();
189	sprintf(global_serial_send, "at+cmgd=1,4\r");
190	serial_send();
191	while ( strstr(global_message_buffer1,"OK") == 0) ;
192	}
193
194
195	void interrupt interrupt_handler(void)
196	{
197	// Finds out what interrupt have been trigged, and starts the respective function.
198	if(RCIF == 1) // Serial recieve interrupt
199	{
200	serial_recieved();
201	RCIF = 0;
202	}
203
204	if(TMR1IF == 1) // timer1 interrupt trigger.
205	{
206	timer1_interrupt();
207	TMR1IF = 0;
208	}
209	}
210
211
212	void serial_send(void)
213	{
214	int i;
215	char data_byte;
216	for(i = 0; i < BUFFER; i++)
217	{
218	data_byte = global_serial_send[i];
219	if( data_byte == '\r')
220	i = (BUFFER - 1);
221	TXREG = data_byte;
222	while(TRMT==0) ;
223	DelayMs(10);
224	}
225	DelayMs(150);
226	global_serial_send[0] = 0;
227	DelayMs(150);
228	}
229
230	///////////////////////////////////////////////////////////////////////////////////////////////////
231	// Takes the recieving data and fills it in a buffer, when we meet a '\r' we fill the data from,
232	// global_serial_recieve_buffer, to global_message_buffer1, and sets the flag global_recieve_done.
233	void serial_recieved(void)
234	{
235	char data_byte;
236
237	data_byte = RCREG;
238
239	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
240	return;
241
242	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
243	return;
244
245
246	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
247	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
248	else
249	{
250	global_serial_recieve_buffer[0] = 0;
251	global_serial_byte_counter = 0;
252	return;
253	}
254
255
256	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
257	// global_message_buffer1 into global_message_buffer2 our main buffer into
258	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
259	// into global_message_buffer1.
260	{
261	global_recieve_done = 1; // indicates the recieve transmission is done.
262	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
263
264	// global_message_buffer1 -> global_message_buffer2
265	strcpy(global_message_buffer2, global_message_buffer1);
266	global_message_buffer_length2 = global_message_buffer_length1;
267
268	// global_serial_recieve_buffer -> global_message_buffer1
269	strcpy(global_message_buffer1, global_serial_recieve_buffer);
270	global_message_buffer_length1 = global_serial_byte_counter;
271
272
273	global_serial_byte_counter = 0;
274	}
275	}
276
277	void timer1_interrupt(void)
278	{
279	TMR1H = 0xEF;
280	TMR1L = 0xFF;
281	global_time_counter++;
282	global_emergency_counter++;
283	RA1 = !RA1;
284	}
285
286	void update_lcd(void)
287	{
288	if(global_temp_update_display != global_time_counter)
289	{
290	// lcd_clear();
291	lcd_goto(0x00);
292
293	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
294	lcd_puts(global_lcd_buf);
295	global_temp_update_display = global_time_counter;
296	}
297
298	}
299
300	void send_update(void)
301	{
302	char update[40];
303	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
304	send_sms(update);
305
306	global_sms_counter++;
307	}
308
309	void send_sms(const unsigned char* payload)
310	{
311	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
312	serial_send();
313	sprintf(global_serial_send, "%s%c", payload, 0x1A);
314	serial_send();
315	DelayMs(150);
316	if(global_sms_counter % 3 == 0)
317	{
318	eeprom_writer();
319	sprintf(global_serial_send, "at+cmgd=1,3\r");
320	serial_send();
321	while ( strstr(global_message_buffer1,"OK") == 0) ;
322	}
323	}
324
325	void convertTemp()
326	{
327	short adVal;
328	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
329	if( adVal >=840 )
330	global_temp = 100;
331	else
332	global_temp = (unsigned char) (adVal / 8.3886);
333	}
334
335
336
337	void eeprom_writer(void)
338	{
339	char len,i;
340
341	len = strlen(global_cell_nr);
342	eeprom_write(0, (global_time_interval/60));
343	eeprom_write(1, global_sms_counter>>8);
344	eeprom_write(2, global_sms_counter);
345	eeprom_write(3, len);
346
347	for (i=0; i<len; ++i)
348	{
349	eeprom_write(i+4, global_cell_nr[i] );
350	}
351	}
352
353	void eeprom_reader(void)
354	{
355	char len,i;
356
357	global_time_interval = eeprom_read(0);
358	global_time_interval *= 60;
359	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
360	len = eeprom_read(3);
361
362	for (i=0; i<len; ++i)
363	{
364	global_cell_nr[i] = eeprom_read(i+4);
365	}
366
367	global_cell_nr[i] = 0; //zero terminated!
368	}
369
370	void on_initial_recieve(void)
371	{
372	char imei[16];
373	char* ptr;
374	char i;
375	char buf[2];
376
377	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
378	{
379	global_modem_init = 1;
380
381	ptr = strstr(global_serial_recieve_buffer,"cgsn");
382	ptr +=4;
383	strncpy(imei, ptr,15);
384	imei[15] = 0;
385
386	reset_recieve_buffer();
387	}
388	}
389
390	void on_recieve(void)
391	{
392	char tmp[3];
393	char* ptr;
394	tmp[0]=0;
395
396	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
397	return;
398
399	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
400	{
401	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
402	strcat(tmp,ptr+1); // puts that number in tmp
403	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
404	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
405	sms_recieved();
406	}
407	reset_recieve_buffer();
408	}
409
410	void sms_recieved(void)
411	{
412	char buf[4];
413	char i,imei;
414	char pos;
415
416	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
417	serial_send(); // Sends the command.
418
419	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
420	DelayMs(1);
421
422	DelayUs(10);
423
424	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
425	{
426	buf[i] = global_message_buffer2[i];
427	}
428
429	buf[i] = 0;
430	imei = atoi(buf);
431
432	if (imei == global_imei_tversum)
433	{
434	i++; //spring over ':'
435	pos = 0;
436	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
437	{
438	global_cell_nr[pos] = global_message_buffer2[i];
439	}
440	global_cell_nr[pos] = 0; //zero terminator
441
442	i++; //spring over ':'
443	pos=0;
444	for ( ; global_message_buffer2[i] ; ++i,++pos)
445	{
446	buf[pos] = global_message_buffer2[i];
447	}
448	buf[pos]=0;
449
450	global_time_interval = atoi(buf);
451	global_time_interval *= 60;
452	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
453	send_sms("conf ok");
454	}
455
456
457	}
458
459
460
461	void main()
462	{
463	////////////////////
464	// Running Init's //
465
466	// Running init for various components.
467	pic18_io_init();
468	RA5 = 1; // Indicates that the board is running inits.
469
470	rs232_init();
471	ad_init();
472	lcd_init(0);
473	interrupt_init();
474	timer_init();
475	sms_init();
476	eeprom_reader();
477	///////////////
478	// Main loop //
479
480	DelayMs(50);
481	reset_recieve_buffer();
482
483	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
484
485	while(1)
486	{
487	// If there happends to be a critical state on the system, we send a sms.
488	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
489	{
490	send_update();
491	global_emergency_counter = 0;
492	}
493	// Every X sec. a status sms is send.
494	if(global_time_counter >= 3600)
495	{
496	send_update();
497	global_time_counter = 0;
498	}
499	// To avoid buffer overrun.
500	if( global_emergency_counter > 7200 )
501	global_emergency_counter = 600;
502
503	// Checks if there has been recieved a config sms.
504	if(global_interval_changed )
505	{
506	eeprom_writer();
507	global_interval_changed = 0;
508	}
509	// Checking if A/D convertion is done, and save the data in global_Pot_??
510	if(GODONE==0)
511	{
512	global_Pot_Hi = ADRESH;
513	global_Pot_Lo = ADRESL;
514	convertTemp();
515	update_lcd();
516	GODONE = 1;
517	}
518	// Handels the recieve sms'es.
519	on_recieve();
520	}
521	}