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	hedin	82	#include <pic18.h>
2			#include <stdio.h>
3	hedin	148	#include <htc.h>
4	hedin	82	#include <string.h>
5	hedin	160	#include <stdlib.h>
6	hedin	148
7	hedin	82	#include "lcd.h"
8	hedin	137	#include "Delay.h"
9	hedin	109	// Delay.h is included inside lcd.c
10	hedin	82
11	hedin	109	#define LCD_LENGTH 16
12			#define LCD_ROWS 2
13	hedin	150	#define BUFFER 128
14	hedin	148	#define PWRFAIL RB1
15			#define FIREDET RB2
16			#define FEEDING RB3
17			#define EMPTYTANK RB4
18	hedin	109
19
20	hedin	137	unsigned char global_Pot_Hi, global_Pot_Lo;
21	hedin	150	unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
22	hedin	148	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	hedin	137
27	hedin	165	unsigned char global_temp_update_display = 0;
28
29	hedin	160	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	hedin	155
34	hedin	151	unsigned char global_lcd_buf[16];
35
36	hedin	150	unsigned short global_imei_tversum;
37
38	hedin	160	unsigned char global_cell_nr[15] = ""; // = "21681784";
39	hedin	150	bit global_modem_init = 0;
40	hedin	160	bit global_has_imei = 0;
41	hedin	148
42	hedin	155	unsigned char global_sms_recieve_number[3];
43
44	hedin	148	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
45			__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
46
47	hedin	137	void serial_recieved(void);
48	hedin	139	void serial_send(void);
49			void update_lcd(void);
50	hedin	148	void convertTemp(void);
51			void timer1_interrupt(void);
52	hedin	150	void on_recieve(void);
53			void on_initial_recieve(void);
54	hedin	155	void sms_recieved(void);
55	hedin	163	void send_sms(const unsigned char* payload);
56	hedin	173	void eeprom_writer(void);
57	hedin	137
58	hedin	150	void reset_recieve_buffer(void)
59	hedin	109	{
60	hedin	155	global_recieve_done = 0;
61
62	hedin	160	global_message_buffer_length1 = 0;
63			//global_message_buffer1[0] = 0;
64			global_message_buffer_length2 = 0;
65			//global_message_buffer2[0] = 0;
66	hedin	155
67	hedin	160	memset(global_message_buffer1, 0, BUFFER);
68			memset(global_message_buffer2, 0, BUFFER);
69	hedin	150	}
70
71	hedin	160	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	hedin	150
81	hedin	160
82
83	hedin	150	void ad_init(void) // Nicked from H7
84			{
85	hedin	109	// AD Conversion clock
86			ADCS0 = 0;
87			ADCS1 = 0;
88			ADCS2 = 0;
89	hedin	82
90	hedin	109	//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	hedin	173	//Reset the A/D result registers
103			ADRESH = 0;
104			ADRESL = 0;
105
106	hedin	148	//Result is right justified
107			ADFM=1;
108	hedin	109
109			//Fire up for A/D converter module
110			ADON=1;
111			}
112
113	hedin	82	void rs232_init(void)
114			{
115			SPEN = 0; // Serial Port Enable Bit... 0 = disabled
116	hedin	137	TRISC6 = 0;
117	hedin	82	TRISC7 = 1;
118	hedin	137
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	hedin	82	}
124
125			void interrupt_init(void)
126			{
127			// Assumes that all interrupts default is 0
128			PEIE = 1;
129			GIE = 1;
130	hedin	137	RCIE = 1; // Recieve interrupt enable.
131			IPEN = 0; // Nfo interrupt priority
132			TXIE = 0; // Serial interrupt enabled
133	hedin	148	TMR1IE = 1; // Enables timer 1
134	hedin	82	}
135
136	hedin	148	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	hedin	82	}
150
151	hedin	137	void sms_init(void)
152	hedin	82	{
153	hedin	148	int i;
154	hedin	160	char buf[2];
155	hedin	173
156			while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
157	hedin	148
158	hedin	150	reset_recieve_buffer();
159	hedin	148	sprintf(global_serial_send,"at+cgsn\r");
160			serial_send();
161	hedin	160
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	hedin	148
178
179	hedin	139	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
180			serial_send();
181
182	hedin	150	while(global_modem_init == 0)
183			{
184			on_initial_recieve();
185			}
186	hedin	160	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	hedin	82	}
193
194	hedin	148
195	hedin	82	void interrupt interrupt_handler(void)
196			{
197	hedin	109	// Finds out what interrupt have been trigged, and starts the respective function.
198	hedin	137	if(RCIF == 1) // Serial recieve interrupt
199	hedin	82	{
200	hedin	137	serial_recieved();
201	hedin	82	RCIF = 0;
202			}
203	hedin	148
204			if(TMR1IF == 1) // timer1 interrupt trigger.
205			{
206			timer1_interrupt();
207			TMR1IF = 0;
208			}
209	hedin	82	}
210	hedin	109
211	hedin	137
212			void serial_send(void)
213			{
214			int i;
215	hedin	148	char data_byte;
216	hedin	150	for(i = 0; i < BUFFER; i++)
217	hedin	109	{
218	hedin	148	data_byte = global_serial_send[i];
219			if( data_byte == '\r')
220	hedin	150	i = (BUFFER - 1);
221	hedin	148	TXREG = data_byte;
222	hedin	139	while(TRMT==0) ;
223	hedin	148	DelayMs(10);
224	hedin	109	}
225	hedin	163	DelayMs(150);
226	hedin	160	global_serial_send[0] = 0;
227	hedin	163	DelayMs(150);
228	hedin	137	}
229
230	hedin	160	///////////////////////////////////////////////////////////////////////////////////////////////////
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	hedin	137	{
235	hedin	162	char data_byte;
236	hedin	137
237	hedin	148	data_byte = RCREG;
238	hedin	137
239	hedin	160	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
240	hedin	150	return;
241	hedin	151
242	hedin	160	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
243	hedin	151	return;
244	hedin	150
245	hedin	160
246	hedin	162	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	hedin	167	else
249			{
250			global_serial_recieve_buffer[0] = 0;
251			global_serial_byte_counter = 0;
252			return;
253			}
254	hedin	160
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	hedin	137	{
261	hedin	160	global_recieve_done = 1; // indicates the recieve transmission is done.
262	hedin	155	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
263
264	hedin	160	// 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	hedin	137	}
275			}
276	hedin	148
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	hedin	139	void update_lcd(void)
287			{
288	hedin	165	if(global_temp_update_display != global_time_counter)
289			{
290	hedin	167	// lcd_clear();
291	hedin	165	lcd_goto(0x00);
292	hedin	151
293	hedin	165	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
294			lcd_puts(global_lcd_buf);
295			global_temp_update_display = global_time_counter;
296			}
297	hedin	148
298			}
299
300			void send_update(void)
301			{
302	hedin	160	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	hedin	163	void send_sms(const unsigned char* payload)
310	hedin	160	{
311			sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
312	hedin	148	serial_send();
313	hedin	160	sprintf(global_serial_send, "%s%c", payload, 0x1A);
314	hedin	148	serial_send();
315	hedin	163	DelayMs(150);
316	hedin	173	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	hedin	148	}
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	hedin	160	global_temp = (unsigned char) (adVal / 8.3886);
333	hedin	148	}
334
335
336
337			void eeprom_writer(void)
338			{
339			char len,i;
340
341	hedin	160	len = strlen(global_cell_nr);
342	hedin	148	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	hedin	139	{
349	hedin	160	eeprom_write(i+4, global_cell_nr[i] );
350	hedin	139	}
351			}
352	hedin	148
353			void eeprom_reader(void)
354			{
355			char len,i;
356	hedin	109
357	hedin	148	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	hedin	160	global_cell_nr[i] = eeprom_read(i+4);
365	hedin	148	}
366
367	hedin	160	global_cell_nr[i] = 0; //zero terminated!
368	hedin	148	}
369
370	hedin	150	void on_initial_recieve(void)
371			{
372			char imei[16];
373			char* ptr;
374			char i;
375	hedin	160	char buf[2];
376	hedin	150
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	hedin	148	void on_recieve(void)
391			{
392	hedin	160	char tmp[3];
393	hedin	151	char* ptr;
394			tmp[0]=0;
395
396	hedin	160	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
397	hedin	150	return;
398	hedin	151
399	hedin	160	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	hedin	151
416	hedin	160	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	hedin	151	{
426	hedin	160	buf[i] = global_message_buffer2[i];
427	hedin	150	}
428	hedin	160
429			buf[i] = 0;
430			imei = atoi(buf);
431
432			if (imei == global_imei_tversum)
433	hedin	155	{
434	hedin	160	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	hedin	155	}
455	hedin	148
456
457	hedin	155	}
458
459	hedin	160
460
461	hedin	82	void main()
462			{
463	hedin	148	////////////////////
464			// Running Init's //
465	hedin	109
466			// Running init for various components.
467	hedin	148	pic18_io_init();
468	hedin	160	RA5 = 1; // Indicates that the board is running inits.
469
470	hedin	148	rs232_init();
471	hedin	109	ad_init();
472			lcd_init(0);
473	hedin	137	interrupt_init();
474	hedin	173	timer_init();
475	hedin	139	sms_init();
476	hedin	148	eeprom_reader();
477			///////////////
478			// Main loop //
479	hedin	150
480	hedin	151	DelayMs(50);
481			reset_recieve_buffer();
482	hedin	150
483	hedin	160	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
484
485	hedin	109	while(1)
486	hedin	100	{
487	hedin	148	// If there happends to be a critical state on the system, we send a sms.
488	hedin	173	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
489	hedin	148	{
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	hedin	109	// 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	hedin	148	convertTemp();
515	hedin	165	update_lcd();
516	hedin	112	GODONE = 1;
517	hedin	109	}
518	hedin	151	// Handels the recieve sms'es.
519			on_recieve();
520	hedin	100	}
521	hedin	82	}