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"

#define BUFFER 160
#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;
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 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 convert_temp(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_buffer_length2 = 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;    // 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 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 modem_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 on_initial_recieve(void)
{
        if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
        {
                global_modem_init = 1;
                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)                   // Serial recieve interrupt
        {
                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++;
}

//////////  ORDENARY FUNKTIONS  //////////
void update_lcd(void)
{
        if(global_temp_update_display != global_time_counter)
        {
                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(void)
{
        short adVal;
        adVal = (global_Pot_Hi << 8) | global_Pot_Lo;
        if( adVal >=840 ) // 840 == 4.1V or 82% of 5V, we do this because 4.1V == 100C.
                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()
{
////////////////////
// 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();
        modem_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;

        // 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();
        }
}
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
10	#define BUFFER 160
11	#define PWRFAIL RB1
12	#define FIREDET RB2
13	#define FEEDING RB3
14	#define EMPTYTANK RB4
15
16
17	unsigned char global_Pot_Hi, global_Pot_Lo;
18	unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
19	bit global_recieve_done = 0;
20	unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0;
21	unsigned int global_emergency_counter = 600, global_time_interval = 3600;
22	unsigned char global_temp = 0;
23
24	unsigned int global_temp_update_display = 0;
25
26	unsigned char global_message_buffer1[BUFFER];
27	unsigned char global_message_buffer2[BUFFER];
28	unsigned char global_message_buffer_length1;
29	unsigned char global_message_buffer_length2;
30
31	unsigned char global_lcd_buf[16];
32
33	unsigned int global_imei_tversum;
34
35	unsigned char global_cell_nr[15] = ""; // = "21681784";
36	bit global_modem_init = 0;
37	bit global_has_imei = 0;
38
39	unsigned char global_sms_recieve_number[3];
40
41	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
42	__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
43
44
45	void serial_recieved(void);
46	void serial_send(void);
47	void update_lcd(void);
48	void convert_temp(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(const unsigned char* payload);
54	void eeprom_writer(void);
55
56
57	void reset_recieve_buffer(void)
58	{
59	global_recieve_done = 0;
60
61	global_message_buffer_length1 = 0;
62	global_message_buffer_length2 = 0;
63
64	memset(global_message_buffer1, 0, BUFFER);
65	memset(global_message_buffer2, 0, BUFFER);
66	}
67	////////// INITS //////////
68	void pic18_io_init(void)
69	{
70	TRISA0 = 1; // analog input
71	TRISA5 = 0; // Output
72	TRISB1 = 1; // TRISB1-4 Digital input
73	TRISB2 = 1;
74	TRISB3 = 1;
75	TRISB4 = 1;
76	}
77
78
79
80	void ad_init(void) // Nicked from H7
81	{
82	// AD Conversion clock
83	ADCS0 = 0;
84	ADCS1 = 0;
85	ADCS2 = 0;
86
87	//Select AN0/RA0 for AD source.
88	// In this (000) setup, it's only RA0/AN0 that does ad convertion.
89	CHS0=0;
90	CHS1=0;
91	CHS2=0;
92
93	//Only AN0 is selected for AD and with Vdd/Vss as limits
94	PCFG0=0;
95	PCFG1=1;
96	PCFG2=1;
97	PCFG3=1;
98
99	//Reset the A/D result registers
100	ADRESH = 0;
101	ADRESL = 0;
102
103	//Result is right justified
104	ADFM=1;
105
106	//Fire up for A/D converter module
107	ADON=1;
108	}
109
110
111
112	void interrupt_init(void)
113	{
114	// Assumes that all interrupts default is 0
115	PEIE = 1;
116	GIE = 1;
117	RCIE = 1; // Recieve interrupt enable.
118	IPEN = 0; // Nfo interrupt priority
119	TXIE = 0; // Serial interrupt enabled
120	TMR1IE = 1; // Enables timer 1
121	}
122
123
124
125	void timer_init(void)
126	{
127	TMR1CS = 1; //use external clock
128
129	T1CKPS1 = 1; //1:8 prescale
130	T1CKPS0 = 1;
131
132	TMR1H = 0xEF;
133	TMR1L = 0xFF;
134
135	T1OSCEN = 1; //enable oscillator circuit
136	RD16 = 0; //normal 8 bit writes
137	TMR1ON = 1;
138	}
139
140	void rs232_init(void)
141	{
142	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
143	TRISC6 = 0;
144	TRISC7 = 1;
145
146	SPBRG = 207; // 1200 baud rate... 25 = 9600
147	// x = (Fosc / (16*[baud rate]) )-1
148	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
149	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
150	}
151
152	void modem_init(void)
153	{
154	int i;
155	char buf[2];
156
157	while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
158
159	reset_recieve_buffer();
160	sprintf(global_serial_send,"at+cgsn\r");
161	serial_send();
162
163	while (global_has_imei == 0)
164	{
165	if (strstr(global_message_buffer1,"OK") != 0)
166	{
167	global_imei_tversum = 0;
168	for (i=0; i<15; ++i)
169	{
170	buf[0] = global_message_buffer2[i];
171	buf[1] = 0;
172	global_imei_tversum += atoi(buf);
173	}
174
175	global_has_imei = 1;
176	}
177	}
178
179	sprintf(global_serial_send,"%s", "at+cpin?\r");
180	serial_send();
181	DelayMs(100); // Delay to give the modem a chance to answer.
182
183	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
184	{
185	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
186	serial_send();
187
188	while(global_modem_init == 0)
189	{
190	on_initial_recieve();
191	}
192	}
193	reset_recieve_buffer();
194	sprintf(global_serial_send, "at+cmgd=1,4\r");
195	serial_send();
196	while ( strstr(global_message_buffer1,"OK") == 0) ;
197	}
198
199	void serial_send(void)
200	{
201	int i;
202	char data_byte;
203	for(i = 0; i < BUFFER; i++)
204	{
205	data_byte = global_serial_send[i];
206	if( data_byte == '\r')
207	i = (BUFFER - 1);
208	TXREG = data_byte;
209	while(TRMT==0) ;
210	DelayMs(10);
211	}
212	DelayMs(150);
213	global_serial_send[0] = 0;
214	DelayMs(150);
215	}
216
217	void on_initial_recieve(void)
218	{
219	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
220	{
221	global_modem_init = 1;
222	reset_recieve_buffer();
223	}
224	}
225
226	////////// INTERRUPT HANDLER //////////
227	void interrupt interrupt_handler(void)
228	{
229	// Finds out what interrupt have been trigged, and starts the respective function.
230	if(RCIF == 1) // Serial recieve interrupt
231	{
232	serial_recieved();
233	RCIF = 0;
234	}
235
236	if(TMR1IF == 1) // timer1 interrupt trigger.
237	{
238	timer1_interrupt();
239	TMR1IF = 0;
240	}
241	}
242
243	////////// INTERRUPT TRIGGED //////////
244	void serial_recieved(void)
245	{
246	char data_byte;
247
248	data_byte = RCREG;
249
250	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
251	return;
252
253	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
254	return;
255
256
257	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
258	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
259	else
260	{
261	global_serial_recieve_buffer[0] = 0;
262	global_serial_byte_counter = 0;
263	return;
264	}
265
266
267	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
268	// global_message_buffer1 into global_message_buffer2 our main buffer into
269	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
270	// into global_message_buffer1.
271	{
272	global_recieve_done = 1; // indicates the recieve transmission is done.
273	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
274
275	// global_message_buffer1 -> global_message_buffer2
276	strcpy(global_message_buffer2, global_message_buffer1);
277	global_message_buffer_length2 = global_message_buffer_length1;
278
279	// global_serial_recieve_buffer -> global_message_buffer1
280	strcpy(global_message_buffer1, global_serial_recieve_buffer);
281	global_message_buffer_length1 = global_serial_byte_counter;
282
283
284	global_serial_byte_counter = 0;
285	}
286	}
287
288	void timer1_interrupt(void)
289	{
290	TMR1H = 0xEF;
291	TMR1L = 0xFF;
292	global_time_counter++;
293	global_emergency_counter++;
294	}
295
296	////////// ORDENARY FUNKTIONS //////////
297	void update_lcd(void)
298	{
299	if(global_temp_update_display != global_time_counter)
300	{
301	lcd_goto(0x00);
302
303	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
304	lcd_puts(global_lcd_buf);
305	global_temp_update_display = global_time_counter;
306	}
307
308	}
309
310	void send_update(void)
311	{
312	char update[40];
313	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
314	send_sms(update);
315
316	global_sms_counter++;
317	}
318
319	void send_sms(const unsigned char* payload)
320	{
321	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
322	serial_send();
323	sprintf(global_serial_send, "%s%c", payload, 0x1A);
324	serial_send();
325	DelayMs(150);
326	if(global_sms_counter % 4 == 0)
327	{
328	eeprom_writer();
329	sprintf(global_serial_send, "at+cmgd=1,3\r");
330	serial_send();
331	while ( strstr(global_message_buffer1,"OK") == 0) ;
332	}
333	}
334
335	void convert_temp(void)
336	{
337	short adVal;
338	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
339	if( adVal >=840 ) // 840 == 4.1V or 82% of 5V, we do this because 4.1V == 100C.
340	global_temp = 100;
341	else
342	global_temp = (unsigned char) (adVal / 8.3886);
343	}
344
345
346
347	void eeprom_writer(void)
348	{
349	char len,i;
350
351	len = strlen(global_cell_nr);
352	eeprom_write(0, (global_time_interval/60));
353	eeprom_write(1, global_sms_counter>>8);
354	eeprom_write(2, global_sms_counter);
355	eeprom_write(3, len);
356
357	for (i=0; i<len; ++i)
358	{
359	eeprom_write(i+4, global_cell_nr[i] );
360	}
361	}
362
363	void eeprom_reader(void)
364	{
365	char len,i;
366
367	global_time_interval = eeprom_read(0);
368	global_time_interval *= 60;
369	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
370	len = eeprom_read(3);
371
372	for (i=0; i<len; ++i)
373	{
374	global_cell_nr[i] = eeprom_read(i+4);
375	}
376
377	global_cell_nr[i] = 0; //zero terminated!
378	}
379
380
381	void on_recieve(void)
382	{
383	char tmp[3];
384	char* ptr;
385	tmp[0]=0;
386
387	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
388	return;
389
390	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
391	{
392	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
393	strcat(tmp,ptr+1); // puts that number in tmp
394	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
395	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
396	sms_recieved();
397	}
398	reset_recieve_buffer();
399	}
400
401	void sms_recieved(void)
402	{
403	char buf[4];
404	char i,imei;
405	char pos;
406
407	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
408	serial_send(); // Sends the command.
409
410	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
411	DelayMs(1);
412
413	DelayUs(10);
414
415	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
416	{
417	buf[i] = global_message_buffer2[i];
418	}
419
420	buf[i] = 0;
421	imei = atoi(buf);
422
423	if (imei == global_imei_tversum)
424	{
425	i++; //spring over ':'
426	pos = 0;
427	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
428	{
429	global_cell_nr[pos] = global_message_buffer2[i];
430	}
431	global_cell_nr[pos] = 0; //zero terminator
432
433	i++; //spring over ':'
434	pos=0;
435	for ( ; global_message_buffer2[i] ; ++i,++pos)
436	{
437	buf[pos] = global_message_buffer2[i];
438	}
439	buf[pos]=0;
440
441	global_time_interval = atoi(buf);
442	global_time_interval *= 60;
443	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
444	send_sms("conf ok");
445	}
446
447
448	}
449
450	void Delay(int time)
451	{
452	int wanted = (global_time_counter + time) % global_time_interval;
453
454	while (global_time_counter < wanted) ;
455	}
456
457	void main()
458	{
459	////////////////////
460	// Running Init's //
461
462	// Running init for various components.
463	pic18_io_init();
464	RA5 = 1; // Indicates that the board is running inits.
465
466	rs232_init();
467	ad_init();
468	lcd_init(0);
469	lcd_clear();
470	lcd_home();
471	interrupt_init();
472	timer_init();
473	modem_init();
474	eeprom_reader();
475	///////////////
476	// Main loop //
477
478	DelayMs(50);
479	reset_recieve_buffer();
480
481	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
482
483	while(1)
484	{
485	// If there happends to be a critical state on the system, we send a sms.
486	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
487	{
488	send_update();
489	global_emergency_counter = 0;
490	}
491
492	// Every X sec. a status sms is send.
493	if(global_time_counter >= global_time_interval)
494	{
495	send_update();
496	global_time_counter = 0;
497	}
498	// To avoid buffer overrun.
499	if( global_emergency_counter > 7200 )
500	global_emergency_counter = 600;
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	convert_temp();
508	update_lcd();
509	GODONE = 1;
510	}
511	// Handels the recieve sms'es.
512	on_recieve();
513	}
514	}