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 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 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 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 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)
{
        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();
        }
}

//////////  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 % 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()
{
        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_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;

        // 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;
                        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 128
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, global_interval_changed = 0;
20	unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0, global_time_counter_image = 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 convertTemp(void);
49	void timer1_interrupt(void);
50	void on_recieve(void);
51	void on_initial_recieve(void);
52	void sms_recieved(void);
53	void send_sms(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_buffer1[0] = 0;
63	global_message_buffer_length2 = 0;
64	//global_message_buffer2[0] = 0;
65
66	memset(global_message_buffer1, 0, BUFFER);
67	memset(global_message_buffer2, 0, BUFFER);
68	}
69	////////// INITS //////////
70	void pic18_io_init(void)
71	{
72	TRISA0 = 1; // analog input
73	TRISA5 = 0; // Output
74	TRISB1 = 1; // TRISB1-4 Digital input
75	TRISB2 = 1;
76	TRISB3 = 1;
77	TRISB4 = 1;
78	}
79
80
81
82	void ad_init(void) // Nicked from H7
83	{
84	// AD Conversion clock
85	ADCS0 = 0;
86	ADCS1 = 0;
87	ADCS2 = 0;
88
89	//Select AN0/RA0 for AD source
90	// In this (000) setup, it's only RA0/AN0 that does ad convertion.
91	CHS0=0;
92	CHS1=0;
93	CHS2=0;
94
95	//Only AN0 is selected for AD and with Vdd/Vss as limits
96	PCFG0=0;
97	PCFG1=1;
98	PCFG2=1;
99	PCFG3=1;
100
101	//Reset the A/D result registers
102	ADRESH = 0;
103	ADRESL = 0;
104
105	//Result is right justified
106	ADFM=1;
107
108	//Fire up for A/D converter module
109	ADON=1;
110	}
111
112
113
114	void interrupt_init(void)
115	{
116	// Assumes that all interrupts default is 0
117	PEIE = 1;
118	GIE = 1;
119	RCIE = 1; // Recieve interrupt enable.
120	IPEN = 0; // Nfo interrupt priority
121	TXIE = 0; // Serial interrupt enabled
122	TMR1IE = 1; // Enables timer 1
123	}
124
125
126
127	void timer_init(void)
128	{
129	TMR1CS = 1; //use external clock
130
131	T1CKPS1 = 1; //1:8 prescale
132	T1CKPS0 = 1;
133
134	TMR1H = 0xEF;
135	TMR1L = 0xFF;
136
137	T1OSCEN = 1; //enable oscillator circuit
138	RD16 = 0; //normal 8 bit writes
139	TMR1ON = 1;
140	}
141
142	void rs232_init(void)
143	{
144	SPEN = 0; // Serial Port Enable Bit... 0 = disabled
145	TRISC6 = 0;
146	TRISC7 = 1;
147
148	SPBRG = 207; // 1200 baud rate... 25 = 9600
149	// x = (Fosc / (16*[baud rate]) )-1
150	TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
151	RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
152	}
153
154	void modem_init(void)
155	{
156	int i;
157	char buf[2];
158
159	while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
160
161	reset_recieve_buffer();
162	sprintf(global_serial_send,"at+cgsn\r");
163	serial_send();
164
165	while (global_has_imei == 0)
166	{
167	if (strstr(global_message_buffer1,"OK") != 0)
168	{
169	global_imei_tversum = 0;
170	for (i=0; i<15; ++i)
171	{
172	buf[0] = global_message_buffer2[i];
173	buf[1] = 0;
174	global_imei_tversum += atoi(buf);
175	}
176
177	global_has_imei = 1;
178	}
179	}
180
181	sprintf(global_serial_send,"%s", "at+cpin?\r");
182	serial_send();
183	DelayMs(100); // Delay to give the modem a chance to answer.
184
185	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
186	{
187	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
188	serial_send();
189
190	while(global_modem_init == 0)
191	{
192	on_initial_recieve();
193	}
194	}
195	reset_recieve_buffer();
196	sprintf(global_serial_send, "at+cmgd=1,4\r");
197	serial_send();
198	while ( strstr(global_message_buffer1,"OK") == 0) ;
199	}
200
201	void serial_send(void)
202	{
203	int i;
204	char data_byte;
205	for(i = 0; i < BUFFER; i++)
206	{
207	data_byte = global_serial_send[i];
208	if( data_byte == '\r')
209	i = (BUFFER - 1);
210	TXREG = data_byte;
211	while(TRMT==0) ;
212	DelayMs(10);
213	}
214	DelayMs(150);
215	global_serial_send[0] = 0;
216	DelayMs(150);
217	}
218
219	void on_initial_recieve(void)
220	{
221	char imei[16];
222	char* ptr;
223	char i;
224	char buf[2];
225
226	if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
227	{
228	global_modem_init = 1;
229
230	ptr = strstr(global_serial_recieve_buffer,"cgsn");
231	ptr +=4;
232	strncpy(imei, ptr,15);
233	imei[15] = 0;
234
235	reset_recieve_buffer();
236	}
237	}
238
239	////////// INTERRUPT HANDLER //////////
240	void interrupt interrupt_handler(void)
241	{
242	// Finds out what interrupt have been trigged, and starts the respective function.
243	if(RCIF == 1) // Serial recieve interrupt
244	{
245	serial_recieved();
246	RCIF = 0;
247	}
248
249	if(TMR1IF == 1) // timer1 interrupt trigger.
250	{
251	timer1_interrupt();
252	TMR1IF = 0;
253	}
254	}
255
256	////////// INTERRUPT TRIGGED //////////
257	void serial_recieved(void)
258	{
259	char data_byte;
260
261	data_byte = RCREG;
262
263	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
264	return;
265
266	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
267	return;
268
269
270	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
271	global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
272	else
273	{
274	global_serial_recieve_buffer[0] = 0;
275	global_serial_byte_counter = 0;
276	return;
277	}
278
279
280	if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
281	// global_message_buffer1 into global_message_buffer2 our main buffer into
282	// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
283	// into global_message_buffer1.
284	{
285	global_recieve_done = 1; // indicates the recieve transmission is done.
286	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
287
288	// global_message_buffer1 -> global_message_buffer2
289	strcpy(global_message_buffer2, global_message_buffer1);
290	global_message_buffer_length2 = global_message_buffer_length1;
291
292	// global_serial_recieve_buffer -> global_message_buffer1
293	strcpy(global_message_buffer1, global_serial_recieve_buffer);
294	global_message_buffer_length1 = global_serial_byte_counter;
295
296
297	global_serial_byte_counter = 0;
298	}
299	}
300
301	void timer1_interrupt(void)
302	{
303	TMR1H = 0xEF;
304	TMR1L = 0xFF;
305	global_time_counter++;
306	global_emergency_counter++;
307	RA1 = !RA1;
308	}
309	////////// ORDENARY FUNKTIONS //////////
310	void update_lcd(void)
311	{
312	if(global_temp_update_display != global_time_counter)
313	{
314	// lcd_clear();
315	lcd_goto(0x00);
316
317	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
318	lcd_puts(global_lcd_buf);
319	global_temp_update_display = global_time_counter;
320	}
321
322	}
323
324	void send_update(void)
325	{
326	char update[40];
327	sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
328	send_sms(update);
329
330	global_sms_counter++;
331	}
332
333	void send_sms(const unsigned char* payload)
334	{
335	sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
336	serial_send();
337	sprintf(global_serial_send, "%s%c", payload, 0x1A);
338	serial_send();
339	DelayMs(150);
340	if(global_sms_counter % 4 == 0)
341	{
342	eeprom_writer();
343	sprintf(global_serial_send, "at+cmgd=1,3\r");
344	serial_send();
345	while ( strstr(global_message_buffer1,"OK") == 0) ;
346	}
347	}
348
349	void convert_temp()
350	{
351	short adVal;
352	adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
353	if( adVal >=840 )
354	global_temp = 100;
355	else
356	global_temp = (unsigned char) (adVal / 8.3886);
357	}
358
359
360
361	void eeprom_writer(void)
362	{
363	char len,i;
364
365	len = strlen(global_cell_nr);
366	eeprom_write(0, (global_time_interval/60));
367	eeprom_write(1, global_sms_counter>>8);
368	eeprom_write(2, global_sms_counter);
369	eeprom_write(3, len);
370
371	for (i=0; i<len; ++i)
372	{
373	eeprom_write(i+4, global_cell_nr[i] );
374	}
375	}
376
377	void eeprom_reader(void)
378	{
379	char len,i;
380
381	global_time_interval = eeprom_read(0);
382	global_time_interval *= 60;
383	global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
384	len = eeprom_read(3);
385
386	for (i=0; i<len; ++i)
387	{
388	global_cell_nr[i] = eeprom_read(i+4);
389	}
390
391	global_cell_nr[i] = 0; //zero terminated!
392	}
393
394
395	void on_recieve(void)
396	{
397	char tmp[3];
398	char* ptr;
399	tmp[0]=0;
400
401	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
402	return;
403
404	if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
405	{
406	ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
407	strcat(tmp,ptr+1); // puts that number in tmp
408	global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
409	strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
410	sms_recieved();
411	}
412	reset_recieve_buffer();
413	}
414
415	void sms_recieved(void)
416	{
417	char buf[4];
418	char i,imei;
419	char pos;
420
421	sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
422	serial_send(); // Sends the command.
423
424	while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
425	DelayMs(1);
426
427	DelayUs(10);
428
429	for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
430	{
431	buf[i] = global_message_buffer2[i];
432	}
433
434	buf[i] = 0;
435	imei = atoi(buf);
436
437	if (imei == global_imei_tversum)
438	{
439	i++; //spring over ':'
440	pos = 0;
441	for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
442	{
443	global_cell_nr[pos] = global_message_buffer2[i];
444	}
445	global_cell_nr[pos] = 0; //zero terminator
446
447	i++; //spring over ':'
448	pos=0;
449	for ( ; global_message_buffer2[i] ; ++i,++pos)
450	{
451	buf[pos] = global_message_buffer2[i];
452	}
453	buf[pos]=0;
454
455	global_time_interval = atoi(buf);
456	global_time_interval *= 60;
457	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
458	send_sms("conf ok");
459	}
460
461
462	}
463
464	void Delay(int time)
465	{
466	int wanted = (global_time_counter + time) % global_time_interval;
467
468	while (global_time_counter < wanted) ;
469	}
470
471	void main()
472	{
473	////////////////////
474	// Running Init's //
475
476	// Running init for various components.
477	pic18_io_init();
478	RA5 = 1; // Indicates that the board is running inits.
479
480	rs232_init();
481	ad_init();
482	lcd_init(0);
483	lcd_clear();
484	lcd_home();
485	interrupt_init();
486	timer_init();
487	modem_init();
488	eeprom_reader();
489	///////////////
490	// Main loop //
491
492	DelayMs(50);
493	reset_recieve_buffer();
494
495	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
496
497	while(1)
498	{
499	// If there happends to be a critical state on the system, we send a sms.
500	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
501	{
502	send_update();
503	global_emergency_counter = 0;
504	}
505
506	// Every X sec. a status sms is send.
507	if(global_time_counter >= global_time_interval)
508	{
509	send_update();
510	global_time_counter = 0;
511	}
512	// To avoid buffer overrun.
513	if( global_emergency_counter > 7200 )
514	global_emergency_counter = 600;
515
516	// Checks if there has been recieved a config sms.
517	if(global_interval_changed )
518	{
519	eeprom_writer();
520	global_interval_changed = 0;
521	}
522	// Checking if A/D convertion is done, and save the data in global_Pot_??
523	if(GODONE==0)
524	{
525	global_Pot_Hi = ADRESH;
526	global_Pot_Lo = ADRESL;
527	convert_temp();
528	update_lcd();
529	GODONE = 1;
530	}
531	// Handels the recieve sms'es.
532	on_recieve();
533	}
534	}