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,  global_time_counter_image = 0;
unsigned int global_emergency_counter = 600, global_time_interval = 3600;
unsigned char global_temp = 0;

unsigned int global_temp_update_display = 0;

unsigned char global_message_buffer1[BUFFER];
unsigned char global_message_buffer2[BUFFER];
unsigned char global_message_buffer_length1;
unsigned char global_message_buffer_length2;

unsigned char global_lcd_buf[16];

unsigned 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);
}       
//////////  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 sms_init(void)
{
        int i;
        char buf[2];
        
        while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ;  // Waiting for the modem to be ready

        reset_recieve_buffer();
        sprintf(global_serial_send,"at+cgsn\r");
        serial_send();
        
        while (global_has_imei == 0)
        {
                if (strstr(global_message_buffer1,"OK") != 0)
                {
                        global_imei_tversum = 0;
                        for (i=0; i<15; ++i)
                        {
                                buf[0] = global_message_buffer2[i];
                                buf[1] = 0;
                                global_imei_tversum += atoi(buf);
                        }
                        
                        global_has_imei = 1;
                }
        }

        sprintf(global_serial_send,"%s", "at+cpin?\r");
        serial_send();
        DelayMs(100);           // 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);
}       
//////////  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++;
        RA1 = !RA1;
}
//////////  ORDENARY FUNKTIONS  //////////
void update_lcd(void)
{
        if(global_temp_update_display != global_time_counter)
        {
        //      lcd_clear();
                lcd_goto(0x00);
        
                sprintf(global_lcd_buf, "Temp: %3d", global_temp);
                lcd_puts(global_lcd_buf);
                global_temp_update_display = global_time_counter;
        }

}
        
void send_update(void)
{
        char update[40];
        sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
        send_sms(update);

        global_sms_counter++;
}       

void send_sms(const unsigned char* payload)
{
        sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
        serial_send();
        sprintf(global_serial_send, "%s%c", payload, 0x1A);
        serial_send();
        DelayMs(150);
        if(global_sms_counter % 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 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();
        sms_init();
        eeprom_reader();
///////////////
// Main loop //

        DelayMs(50);
        reset_recieve_buffer();

        RA5 = 0;                        // Inits are done, and RA1 will now work as a error notifier.

        while(1)
        {
        // If there happends to be a critical state on the system, we send a sms.
                if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING ==1 ) && global_emergency_counter >= 600 )
                {
                        send_update();
                        global_emergency_counter = 0;
                }
                
        // Every X sec. a status sms is send.
                if(global_time_counter >= global_time_interval)
                {
                        send_update();
                        global_time_counter = 0;
                }
        // To avoid buffer overrun.
                if( global_emergency_counter > 7200 )
                        global_emergency_counter = 600;

        // Checks if there has been recieved a config sms.
                if(global_interval_changed )
                {
                        eeprom_writer();
                        global_interval_changed = 0;
                }
        // Checking if A/D convertion is done, and save the data in global_Pot_??
                if(GODONE==0)
                {
                        global_Pot_Hi = ADRESH;
                        global_Pot_Lo = ADRESL;
                        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, global_time_counter_image = 0;
24	unsigned int global_emergency_counter = 600, global_time_interval = 3600;
25	unsigned char global_temp = 0;
26
27	unsigned int 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
48	void serial_recieved(void);
49	void serial_send(void);
50	void update_lcd(void);
51	void convertTemp(void);
52	void timer1_interrupt(void);
53	void on_recieve(void);
54	void on_initial_recieve(void);
55	void sms_recieved(void);
56	void send_sms(const unsigned char* payload);
57	void eeprom_writer(void);
58
59
60	void reset_recieve_buffer(void)
61	{
62	global_recieve_done = 0;
63
64	global_message_buffer_length1 = 0;
65	//global_message_buffer1[0] = 0;
66	global_message_buffer_length2 = 0;
67	//global_message_buffer2[0] = 0;
68
69	memset(global_message_buffer1, 0, BUFFER);
70	memset(global_message_buffer2, 0, BUFFER);
71	}
72	////////// INITS //////////
73	void pic18_io_init(void)
74	{
75	TRISA0 = 1; // analog input
76	TRISA5 = 0; // Output
77	TRISB1 = 1; // TRISB1-4 Digital input
78	TRISB2 = 1;
79	TRISB3 = 1;
80	TRISB4 = 1;
81	}
82
83
84
85	void ad_init(void) // Nicked from H7
86	{
87	// AD Conversion clock
88	ADCS0 = 0;
89	ADCS1 = 0;
90	ADCS2 = 0;
91
92	//Select AN0/RA0 for AD source
93	// In this (000) setup, it's only RA0/AN0 that does ad convertion.
94	CHS0=0;
95	CHS1=0;
96	CHS2=0;
97
98	//Only AN0 is selected for AD and with Vdd/Vss as limits
99	PCFG0=0;
100	PCFG1=1;
101	PCFG2=1;
102	PCFG3=1;
103
104	//Reset the A/D result registers
105	ADRESH = 0;
106	ADRESL = 0;
107
108	//Result is right justified
109	ADFM=1;
110
111	//Fire up for A/D converter module
112	ADON=1;
113	}
114
115
116
117	void interrupt_init(void)
118	{
119	// Assumes that all interrupts default is 0
120	PEIE = 1;
121	GIE = 1;
122	RCIE = 1; // Recieve interrupt enable.
123	IPEN = 0; // Nfo interrupt priority
124	TXIE = 0; // Serial interrupt enabled
125	TMR1IE = 1; // Enables timer 1
126	}
127
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 rs232_init(void)
146	{
147	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
148	TRISC6 = 0;
149	TRISC7 = 1;
150
151	SPBRG = 207; // 1200 baud rate... 25 = 9600
152	// x = (Fosc / (16*[baud rate]) )-1
153	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
154	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
155	}
156
157	void sms_init(void)
158	{
159	int i;
160	char buf[2];
161
162	while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
163
164	reset_recieve_buffer();
165	sprintf(global_serial_send,"at+cgsn\r");
166	serial_send();
167
168	while (global_has_imei == 0)
169	{
170	if (strstr(global_message_buffer1,"OK") != 0)
171	{
172	global_imei_tversum = 0;
173	for (i=0; i<15; ++i)
174	{
175	buf[0] = global_message_buffer2[i];
176	buf[1] = 0;
177	global_imei_tversum += atoi(buf);
178	}
179
180	global_has_imei = 1;
181	}
182	}
183
184	sprintf(global_serial_send,"%s", "at+cpin?\r");
185	serial_send();
186	DelayMs(100); // To give the modem a chance to answer.
187
188	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
189	{
190	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
191	serial_send();
192
193	while(global_modem_init == 0)
194	{
195	on_initial_recieve();
196	}
197	}
198	reset_recieve_buffer();
199	sprintf(global_serial_send, "at+cmgd=1,4\r");
200	serial_send();
201	while ( strstr(global_message_buffer1,"OK") == 0) ;
202	}
203
204	void serial_send(void)
205	{
206	int i;
207	char data_byte;
208	for(i = 0; i < BUFFER; i++)
209	{
210	data_byte = global_serial_send[i];
211	if( data_byte == '\r')
212	i = (BUFFER - 1);
213	TXREG = data_byte;
214	while(TRMT==0) ;
215	DelayMs(10);
216	}
217	DelayMs(150);
218	global_serial_send[0] = 0;
219	DelayMs(150);
220	}
221	////////// INTERRUPT HANDLER //////////
222	void interrupt interrupt_handler(void)
223	{
224	// Finds out what interrupt have been trigged, and starts the respective function.
225	if(RCIF == 1) // Serial recieve interrupt
226	{
227	serial_recieved();
228	RCIF = 0;
229	}
230
231	if(TMR1IF == 1) // timer1 interrupt trigger.
232	{
233	timer1_interrupt();
234	TMR1IF = 0;
235	}
236	}
237
238	////////// INTERRUPT TRIGGED //////////
239	void serial_recieved(void)
240	{
241	char data_byte;
242
243	data_byte = RCREG;
244
245	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
246	return;
247
248	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
249	return;
250
251
252	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
253	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
254	else
255	{
256	global_serial_recieve_buffer[0] = 0;
257	global_serial_byte_counter = 0;
258	return;
259	}
260
261
262	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
263	// global_message_buffer1 into global_message_buffer2 our main buffer into
264	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
265	// into global_message_buffer1.
266	{
267	global_recieve_done = 1; // indicates the recieve transmission is done.
268	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
269
270	// global_message_buffer1 -> global_message_buffer2
271	strcpy(global_message_buffer2, global_message_buffer1);
272	global_message_buffer_length2 = global_message_buffer_length1;
273
274	// global_serial_recieve_buffer -> global_message_buffer1
275	strcpy(global_message_buffer1, global_serial_recieve_buffer);
276	global_message_buffer_length1 = global_serial_byte_counter;
277
278
279	global_serial_byte_counter = 0;
280	}
281	}
282
283	void timer1_interrupt(void)
284	{
285	TMR1H = 0xEF;
286	TMR1L = 0xFF;
287	global_time_counter++;
288	global_emergency_counter++;
289	RA1 = !RA1;
290	}
291	////////// ORDENARY FUNKTIONS //////////
292	void update_lcd(void)
293	{
294	if(global_temp_update_display != global_time_counter)
295	{
296	// lcd_clear();
297	lcd_goto(0x00);
298
299	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
300	lcd_puts(global_lcd_buf);
301	global_temp_update_display = global_time_counter;
302	}
303
304	}
305
306	void send_update(void)
307	{
308	char update[40];
309	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
310	send_sms(update);
311
312	global_sms_counter++;
313	}
314
315	void send_sms(const unsigned char* payload)
316	{
317	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
318	serial_send();
319	sprintf(global_serial_send, "%s%c", payload, 0x1A);
320	serial_send();
321	DelayMs(150);
322	if(global_sms_counter % 3 == 0)
323	{
324	eeprom_writer();
325	sprintf(global_serial_send, "at+cmgd=1,3\r");
326	serial_send();
327	while ( strstr(global_message_buffer1,"OK") == 0) ;
328	}
329	}
330
331	void convertTemp()
332	{
333	short adVal;
334	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
335	if( adVal >=840 )
336	global_temp = 100;
337	else
338	global_temp = (unsigned char) (adVal / 8.3886);
339	}
340
341
342
343	void eeprom_writer(void)
344	{
345	char len,i;
346
347	len = strlen(global_cell_nr);
348	eeprom_write(0, (global_time_interval/60));
349	eeprom_write(1, global_sms_counter>>8);
350	eeprom_write(2, global_sms_counter);
351	eeprom_write(3, len);
352
353	for (i=0; i<len; ++i)
354	{
355	eeprom_write(i+4, global_cell_nr[i] );
356	}
357	}
358
359	void eeprom_reader(void)
360	{
361	char len,i;
362
363	global_time_interval = eeprom_read(0);
364	global_time_interval *= 60;
365	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
366	len = eeprom_read(3);
367
368	for (i=0; i<len; ++i)
369	{
370	global_cell_nr[i] = eeprom_read(i+4);
371	}
372
373	global_cell_nr[i] = 0; //zero terminated!
374	}
375
376	void on_initial_recieve(void)
377	{
378	char imei[16];
379	char* ptr;
380	char i;
381	char buf[2];
382
383	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
384	{
385	global_modem_init = 1;
386
387	ptr = strstr(global_serial_recieve_buffer,"cgsn");
388	ptr +=4;
389	strncpy(imei, ptr,15);
390	imei[15] = 0;
391
392	reset_recieve_buffer();
393	}
394	}
395
396	void on_recieve(void)
397	{
398	char tmp[3];
399	char* ptr;
400	tmp[0]=0;
401
402	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
403	return;
404
405	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
406	{
407	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
408	strcat(tmp,ptr+1); // puts that number in tmp
409	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
410	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
411	sms_recieved();
412	}
413	reset_recieve_buffer();
414	}
415
416	void sms_recieved(void)
417	{
418	char buf[4];
419	char i,imei;
420	char pos;
421
422	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
423	serial_send(); // Sends the command.
424
425	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
426	DelayMs(1);
427
428	DelayUs(10);
429
430	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
431	{
432	buf[i] = global_message_buffer2[i];
433	}
434
435	buf[i] = 0;
436	imei = atoi(buf);
437
438	if (imei == global_imei_tversum)
439	{
440	i++; //spring over ':'
441	pos = 0;
442	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
443	{
444	global_cell_nr[pos] = global_message_buffer2[i];
445	}
446	global_cell_nr[pos] = 0; //zero terminator
447
448	i++; //spring over ':'
449	pos=0;
450	for ( ; global_message_buffer2[i] ; ++i,++pos)
451	{
452	buf[pos] = global_message_buffer2[i];
453	}
454	buf[pos]=0;
455
456	global_time_interval = atoi(buf);
457	global_time_interval *= 60;
458	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
459	send_sms("conf ok");
460	}
461
462
463	}
464
465	void Delay(int time)
466	{
467	int wanted = (global_time_counter + time) % global_time_interval;
468
469	while (global_time_counter < wanted) ;
470	}
471
472	void main()
473	{
474	////////////////////
475	// Running Init's //
476
477	// Running init for various components.
478	pic18_io_init();
479	RA5 = 1; // Indicates that the board is running inits.
480
481	rs232_init();
482	ad_init();
483	lcd_init(0);
484	lcd_clear();
485	lcd_home();
486	interrupt_init();
487	timer_init();
488	sms_init();
489	eeprom_reader();
490	///////////////
491	// Main loop //
492
493	DelayMs(50);
494	reset_recieve_buffer();
495
496	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
497
498	while(1)
499	{
500	// If there happends to be a critical state on the system, we send a sms.
501	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
502	{
503	send_update();
504	global_emergency_counter = 0;
505	}
506
507	// Every X sec. a status sms is send.
508	if(global_time_counter >= global_time_interval)
509	{
510	send_update();
511	global_time_counter = 0;
512	}
513	// To avoid buffer overrun.
514	if( global_emergency_counter > 7200 )
515	global_emergency_counter = 600;
516
517	// Checks if there has been recieved a config sms.
518	if(global_interval_changed )
519	{
520	eeprom_writer();
521	global_interval_changed = 0;
522	}
523	// Checking if A/D convertion is done, and save the data in global_Pot_??
524	if(GODONE==0)
525	{
526	global_Pot_Hi = ADRESH;
527	global_Pot_Lo = ADRESL;
528	convertTemp();
529	update_lcd();
530	GODONE = 1;
531	}
532	// Handels the recieve sms'es.
533	on_recieve();
534	}
535	}