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	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	82
10	hedin	150	#define BUFFER 128
11	hedin	148	#define PWRFAIL RB1
12			#define FIREDET RB2
13			#define FEEDING RB3
14			#define EMPTYTANK RB4
15	hedin	109
16
17	hedin	137	unsigned char global_Pot_Hi, global_Pot_Lo;
18	hedin	150	unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
19	hedin	148	bit global_recieve_done = 0, global_interval_changed = 0;
20	hedin	175	unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0, global_time_counter_image = 0;
21	hedin	148	unsigned int global_emergency_counter = 600, global_time_interval = 3600;
22			unsigned char global_temp = 0;
23	hedin	137
24	hedin	175	unsigned int global_temp_update_display = 0;
25	hedin	165
26	hedin	160	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	hedin	155
31	hedin	151	unsigned char global_lcd_buf[16];
32
33	hedin	178	unsigned int global_imei_tversum;
34	hedin	150
35	hedin	160	unsigned char global_cell_nr[15] = ""; // = "21681784";
36	hedin	150	bit global_modem_init = 0;
37	hedin	160	bit global_has_imei = 0;
38	hedin	148
39	hedin	155	unsigned char global_sms_recieve_number[3];
40
41	hedin	148	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
42			__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
43
44	hedin	175
45	hedin	137	void serial_recieved(void);
46	hedin	139	void serial_send(void);
47			void update_lcd(void);
48	hedin	148	void convertTemp(void);
49			void timer1_interrupt(void);
50	hedin	150	void on_recieve(void);
51			void on_initial_recieve(void);
52	hedin	155	void sms_recieved(void);
53	hedin	163	void send_sms(const unsigned char* payload);
54	hedin	173	void eeprom_writer(void);
55	hedin	137
56	hedin	175
57	hedin	150	void reset_recieve_buffer(void)
58	hedin	109	{
59	hedin	155	global_recieve_done = 0;
60
61	hedin	160	global_message_buffer_length1 = 0;
62			//global_message_buffer1[0] = 0;
63			global_message_buffer_length2 = 0;
64			//global_message_buffer2[0] = 0;
65	hedin	155
66	hedin	160	memset(global_message_buffer1, 0, BUFFER);
67			memset(global_message_buffer2, 0, BUFFER);
68	hedin	150	}
69	hedin	175	////////// INITS //////////
70	hedin	160	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	hedin	150
80	hedin	160
81
82	hedin	150	void ad_init(void) // Nicked from H7
83			{
84	hedin	109	// AD Conversion clock
85			ADCS0 = 0;
86			ADCS1 = 0;
87			ADCS2 = 0;
88	hedin	82
89	hedin	109	//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	hedin	173	//Reset the A/D result registers
102			ADRESH = 0;
103			ADRESL = 0;
104
105	hedin	148	//Result is right justified
106			ADFM=1;
107	hedin	109
108			//Fire up for A/D converter module
109			ADON=1;
110			}
111
112	hedin	137
113	hedin	82
114			void interrupt_init(void)
115			{
116			// Assumes that all interrupts default is 0
117			PEIE = 1;
118			GIE = 1;
119	hedin	137	RCIE = 1; // Recieve interrupt enable.
120			IPEN = 0; // Nfo interrupt priority
121			TXIE = 0; // Serial interrupt enabled
122	hedin	148	TMR1IE = 1; // Enables timer 1
123	hedin	82	}
124
125	hedin	175
126
127	hedin	148	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	hedin	175	}
141
142			void rs232_init(void)
143			{
144			SPEN = 0; // Serial Port Enable Bit... 0 = disabled
145			TRISC6 = 0;
146			TRISC7 = 1;
147	hedin	82
148	hedin	175	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	hedin	201	void modem_init(void)
155	hedin	82	{
156	hedin	148	int i;
157	hedin	160	char buf[2];
158	hedin	173
159			while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
160	hedin	148
161	hedin	150	reset_recieve_buffer();
162	hedin	148	sprintf(global_serial_send,"at+cgsn\r");
163			serial_send();
164	hedin	160
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	hedin	148
181	hedin	175	sprintf(global_serial_send,"%s", "at+cpin?\r");
182	hedin	139	serial_send();
183	hedin	178	DelayMs(100); // Delay to give the modem a chance to answer.
184	hedin	139
185	hedin	175	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
186	hedin	150	{
187	hedin	175	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	hedin	150	}
195	hedin	160	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	hedin	82	}
200
201	hedin	137	void serial_send(void)
202			{
203			int i;
204	hedin	148	char data_byte;
205	hedin	150	for(i = 0; i < BUFFER; i++)
206	hedin	109	{
207	hedin	148	data_byte = global_serial_send[i];
208			if( data_byte == '\r')
209	hedin	150	i = (BUFFER - 1);
210	hedin	148	TXREG = data_byte;
211	hedin	139	while(TRMT==0) ;
212	hedin	148	DelayMs(10);
213	hedin	109	}
214	hedin	163	DelayMs(150);
215	hedin	160	global_serial_send[0] = 0;
216	hedin	163	DelayMs(150);
217	hedin	178	}
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	hedin	175	////////// 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	hedin	137
256	hedin	175	////////// INTERRUPT TRIGGED //////////
257	hedin	160	void serial_recieved(void)
258	hedin	137	{
259	hedin	162	char data_byte;
260	hedin	137
261	hedin	148	data_byte = RCREG;
262	hedin	137
263	hedin	160	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
264	hedin	150	return;
265	hedin	151
266	hedin	160	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
267	hedin	151	return;
268	hedin	150
269	hedin	160
270	hedin	162	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	hedin	167	else
273			{
274			global_serial_recieve_buffer[0] = 0;
275			global_serial_byte_counter = 0;
276			return;
277			}
278	hedin	160
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	hedin	137	{
285	hedin	160	global_recieve_done = 1; // indicates the recieve transmission is done.
286	hedin	155	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
287
288	hedin	160	// 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	hedin	137	}
299			}
300	hedin	148
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	hedin	175	////////// ORDENARY FUNKTIONS //////////
310	hedin	139	void update_lcd(void)
311			{
312	hedin	165	if(global_temp_update_display != global_time_counter)
313			{
314	hedin	167	// lcd_clear();
315	hedin	165	lcd_goto(0x00);
316	hedin	151
317	hedin	165	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
318			lcd_puts(global_lcd_buf);
319			global_temp_update_display = global_time_counter;
320			}
321	hedin	148
322			}
323
324			void send_update(void)
325			{
326	hedin	160	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	hedin	163	void send_sms(const unsigned char* payload)
334	hedin	160	{
335			sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
336	hedin	148	serial_send();
337	hedin	160	sprintf(global_serial_send, "%s%c", payload, 0x1A);
338	hedin	148	serial_send();
339	hedin	163	DelayMs(150);
340	hedin	178	if(global_sms_counter % 4 == 0)
341	hedin	173	{
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	hedin	148	}
348
349	hedin	178	void convert_temp()
350	hedin	148	{
351			short adVal;
352			adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
353			if( adVal >=840 )
354			global_temp = 100;
355			else
356	hedin	160	global_temp = (unsigned char) (adVal / 8.3886);
357	hedin	148	}
358
359
360
361			void eeprom_writer(void)
362			{
363			char len,i;
364
365	hedin	160	len = strlen(global_cell_nr);
366	hedin	148	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	hedin	139	{
373	hedin	160	eeprom_write(i+4, global_cell_nr[i] );
374	hedin	139	}
375			}
376	hedin	148
377			void eeprom_reader(void)
378			{
379			char len,i;
380	hedin	109
381	hedin	148	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	hedin	160	global_cell_nr[i] = eeprom_read(i+4);
389	hedin	148	}
390
391	hedin	160	global_cell_nr[i] = 0; //zero terminated!
392	hedin	148	}
393
394	hedin	150
395	hedin	148	void on_recieve(void)
396			{
397	hedin	160	char tmp[3];
398	hedin	151	char* ptr;
399			tmp[0]=0;
400
401	hedin	160	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
402	hedin	150	return;
403	hedin	151
404	hedin	160	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	hedin	201	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	hedin	160	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	hedin	151
421	hedin	160	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	hedin	151	{
431	hedin	160	buf[i] = global_message_buffer2[i];
432	hedin	150	}
433	hedin	160
434			buf[i] = 0;
435			imei = atoi(buf);
436
437			if (imei == global_imei_tversum)
438	hedin	155	{
439	hedin	160	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	hedin	201	eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
458	hedin	160	send_sms("conf ok");
459	hedin	155	}
460	hedin	148
461
462	hedin	155	}
463
464	hedin	175	void Delay(int time)
465			{
466			int wanted = (global_time_counter + time) % global_time_interval;
467
468			while (global_time_counter < wanted) ;
469			}
470	hedin	160
471	hedin	82	void main()
472			{
473	hedin	148	////////////////////
474			// Running Init's //
475	hedin	109
476			// Running init for various components.
477	hedin	148	pic18_io_init();
478	hedin	201	RA5 = 1; // Indicates that the board is running inits.
479	hedin	160
480	hedin	148	rs232_init();
481	hedin	109	ad_init();
482			lcd_init(0);
483	hedin	175	lcd_clear();
484			lcd_home();
485	hedin	137	interrupt_init();
486	hedin	173	timer_init();
487	hedin	201	modem_init();
488	hedin	148	eeprom_reader();
489			///////////////
490			// Main loop //
491	hedin	150
492	hedin	151	DelayMs(50);
493			reset_recieve_buffer();
494	hedin	150
495	hedin	160	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
496
497	hedin	109	while(1)
498	hedin	100	{
499	hedin	148	// If there happends to be a critical state on the system, we send a sms.
500	hedin	173	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
501	hedin	148	{
502			send_update();
503			global_emergency_counter = 0;
504			}
505	hedin	175
506	hedin	148	// Every X sec. a status sms is send.
507	hedin	175	if(global_time_counter >= global_time_interval)
508	hedin	148	{
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	hedin	109	// 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	hedin	178	convert_temp();
528	hedin	165	update_lcd();
529	hedin	112	GODONE = 1;
530	hedin	109	}
531	hedin	151	// Handels the recieve sms'es.
532			on_recieve();
533	hedin	100	}
534	hedin	82	}