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 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 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);           // 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();
        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;
                        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	109	// Delay.h is included inside lcd.c
10	hedin	82
11	hedin	150	#define BUFFER 128
12	hedin	148	#define PWRFAIL RB1
13			#define FIREDET RB2
14			#define FEEDING RB3
15			#define EMPTYTANK RB4
16	hedin	109
17
18	hedin	137	unsigned char global_Pot_Hi, global_Pot_Lo;
19	hedin	150	unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
20	hedin	148	bit global_recieve_done = 0, global_interval_changed = 0;
21	hedin	175	unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0, global_time_counter_image = 0;
22	hedin	148	unsigned int global_emergency_counter = 600, global_time_interval = 3600;
23			unsigned char global_temp = 0;
24	hedin	137
25	hedin	175	unsigned int global_temp_update_display = 0;
26	hedin	165
27	hedin	160	unsigned char global_message_buffer1[BUFFER];
28			unsigned char global_message_buffer2[BUFFER];
29			unsigned char global_message_buffer_length1;
30			unsigned char global_message_buffer_length2;
31	hedin	155
32	hedin	151	unsigned char global_lcd_buf[16];
33
34	hedin	178	unsigned int global_imei_tversum;
35	hedin	150
36	hedin	160	unsigned char global_cell_nr[15] = ""; // = "21681784";
37	hedin	150	bit global_modem_init = 0;
38	hedin	160	bit global_has_imei = 0;
39	hedin	148
40	hedin	155	unsigned char global_sms_recieve_number[3];
41
42	hedin	148	__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
43			__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
44
45	hedin	175
46	hedin	137	void serial_recieved(void);
47	hedin	139	void serial_send(void);
48			void update_lcd(void);
49	hedin	148	void convertTemp(void);
50			void timer1_interrupt(void);
51	hedin	150	void on_recieve(void);
52			void on_initial_recieve(void);
53	hedin	155	void sms_recieved(void);
54	hedin	163	void send_sms(const unsigned char* payload);
55	hedin	173	void eeprom_writer(void);
56	hedin	137
57	hedin	175
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	hedin	175	////////// INITS //////////
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	137
114	hedin	82
115			void interrupt_init(void)
116			{
117			// Assumes that all interrupts default is 0
118			PEIE = 1;
119			GIE = 1;
120	hedin	137	RCIE = 1; // Recieve interrupt enable.
121			IPEN = 0; // Nfo interrupt priority
122			TXIE = 0; // Serial interrupt enabled
123	hedin	148	TMR1IE = 1; // Enables timer 1
124	hedin	82	}
125
126	hedin	175
127
128	hedin	148	void timer_init(void)
129			{
130			TMR1CS = 1; //use external clock
131
132			T1CKPS1 = 1; //1:8 prescale
133			T1CKPS0 = 1;
134
135			TMR1H = 0xEF;
136			TMR1L = 0xFF;
137
138			T1OSCEN = 1; //enable oscillator circuit
139			RD16 = 0; //normal 8 bit writes
140			TMR1ON = 1;
141	hedin	175	}
142
143			void rs232_init(void)
144			{
145			SPEN = 0; // Serial Port Enable Bit... 0 = disabled
146			TRISC6 = 0;
147			TRISC7 = 1;
148	hedin	82
149	hedin	175	SPBRG = 207; // 1200 baud rate... 25 = 9600
150			// x = (Fosc / (16*[baud rate]) )-1
151			TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
152			RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
153			}
154
155	hedin	137	void sms_init(void)
156	hedin	82	{
157	hedin	148	int i;
158	hedin	160	char buf[2];
159	hedin	173
160			while ( strstr(global_message_buffer1,"+WIND: 7") == 0 && global_time_counter < 10 ) ; // Waiting for the modem to be ready
161	hedin	148
162	hedin	150	reset_recieve_buffer();
163	hedin	148	sprintf(global_serial_send,"at+cgsn\r");
164			serial_send();
165	hedin	160
166			while (global_has_imei == 0)
167			{
168			if (strstr(global_message_buffer1,"OK") != 0)
169			{
170			global_imei_tversum = 0;
171			for (i=0; i<15; ++i)
172			{
173			buf[0] = global_message_buffer2[i];
174			buf[1] = 0;
175			global_imei_tversum += atoi(buf);
176			}
177
178			global_has_imei = 1;
179			}
180			}
181	hedin	148
182	hedin	175	sprintf(global_serial_send,"%s", "at+cpin?\r");
183	hedin	139	serial_send();
184	hedin	178	DelayMs(100); // Delay to give the modem a chance to answer.
185	hedin	139
186	hedin	175	if (strstr(global_message_buffer1, "+CPIN: SIM PIN") != 0)
187	hedin	150	{
188	hedin	175	sprintf(global_serial_send,"%s", "at+cpin=8043\r");
189			serial_send();
190
191			while(global_modem_init == 0)
192			{
193			on_initial_recieve();
194			}
195	hedin	150	}
196	hedin	160	reset_recieve_buffer();
197			sprintf(global_serial_send, "at+cmgd=1,4\r");
198			serial_send();
199			while ( strstr(global_message_buffer1,"OK") == 0) ;
200	hedin	82	}
201
202	hedin	137	void serial_send(void)
203			{
204			int i;
205	hedin	148	char data_byte;
206	hedin	150	for(i = 0; i < BUFFER; i++)
207	hedin	109	{
208	hedin	148	data_byte = global_serial_send[i];
209			if( data_byte == '\r')
210	hedin	150	i = (BUFFER - 1);
211	hedin	148	TXREG = data_byte;
212	hedin	139	while(TRMT==0) ;
213	hedin	148	DelayMs(10);
214	hedin	109	}
215	hedin	163	DelayMs(150);
216	hedin	160	global_serial_send[0] = 0;
217	hedin	163	DelayMs(150);
218	hedin	178	}
219
220			void on_initial_recieve(void)
221			{
222			char imei[16];
223			char* ptr;
224			char i;
225			char buf[2];
226
227			if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
228			{
229			global_modem_init = 1;
230
231			ptr = strstr(global_serial_recieve_buffer,"cgsn");
232			ptr +=4;
233			strncpy(imei, ptr,15);
234			imei[15] = 0;
235
236			reset_recieve_buffer();
237			}
238			}
239
240	hedin	175	////////// INTERRUPT HANDLER //////////
241			void interrupt interrupt_handler(void)
242			{
243			// Finds out what interrupt have been trigged, and starts the respective function.
244			if(RCIF == 1) // Serial recieve interrupt
245			{
246			serial_recieved();
247			RCIF = 0;
248			}
249
250			if(TMR1IF == 1) // timer1 interrupt trigger.
251			{
252			timer1_interrupt();
253			TMR1IF = 0;
254			}
255			}
256	hedin	137
257	hedin	175	////////// INTERRUPT TRIGGED //////////
258	hedin	160	void serial_recieved(void)
259	hedin	137	{
260	hedin	162	char data_byte;
261	hedin	137
262	hedin	148	data_byte = RCREG;
263	hedin	137
264	hedin	160	if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
265	hedin	150	return;
266	hedin	151
267	hedin	160	if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
268	hedin	151	return;
269	hedin	150
270	hedin	160
271	hedin	162	if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
272			global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
273	hedin	167	else
274			{
275			global_serial_recieve_buffer[0] = 0;
276			global_serial_byte_counter = 0;
277			return;
278			}
279	hedin	160
280
281			if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
282			// global_message_buffer1 into global_message_buffer2 our main buffer into
283			// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
284			// into global_message_buffer1.
285	hedin	137	{
286	hedin	160	global_recieve_done = 1; // indicates the recieve transmission is done.
287	hedin	155	global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
288
289	hedin	160	// global_message_buffer1 -> global_message_buffer2
290			strcpy(global_message_buffer2, global_message_buffer1);
291			global_message_buffer_length2 = global_message_buffer_length1;
292
293			// global_serial_recieve_buffer -> global_message_buffer1
294			strcpy(global_message_buffer1, global_serial_recieve_buffer);
295			global_message_buffer_length1 = global_serial_byte_counter;
296
297
298			global_serial_byte_counter = 0;
299	hedin	137	}
300			}
301	hedin	148
302			void timer1_interrupt(void)
303			{
304			TMR1H = 0xEF;
305			TMR1L = 0xFF;
306			global_time_counter++;
307			global_emergency_counter++;
308			RA1 = !RA1;
309			}
310	hedin	175	////////// ORDENARY FUNKTIONS //////////
311	hedin	139	void update_lcd(void)
312			{
313	hedin	165	if(global_temp_update_display != global_time_counter)
314			{
315	hedin	167	// lcd_clear();
316	hedin	165	lcd_goto(0x00);
317	hedin	151
318	hedin	165	sprintf(global_lcd_buf, "Temp: %3d", global_temp);
319			lcd_puts(global_lcd_buf);
320			global_temp_update_display = global_time_counter;
321			}
322	hedin	148
323			}
324
325			void send_update(void)
326			{
327	hedin	160	char update[40];
328			sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
329			send_sms(update);
330
331			global_sms_counter++;
332			}
333
334	hedin	163	void send_sms(const unsigned char* payload)
335	hedin	160	{
336			sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
337	hedin	148	serial_send();
338	hedin	160	sprintf(global_serial_send, "%s%c", payload, 0x1A);
339	hedin	148	serial_send();
340	hedin	163	DelayMs(150);
341	hedin	178	if(global_sms_counter % 4 == 0)
342	hedin	173	{
343			eeprom_writer();
344			sprintf(global_serial_send, "at+cmgd=1,3\r");
345			serial_send();
346			while ( strstr(global_message_buffer1,"OK") == 0) ;
347			}
348	hedin	148	}
349
350	hedin	178	void convert_temp()
351	hedin	148	{
352			short adVal;
353			adVal = (global_Pot_Hi << 8) \| global_Pot_Lo;
354			if( adVal >=840 )
355			global_temp = 100;
356			else
357	hedin	160	global_temp = (unsigned char) (adVal / 8.3886);
358	hedin	148	}
359
360
361
362			void eeprom_writer(void)
363			{
364			char len,i;
365
366	hedin	160	len = strlen(global_cell_nr);
367	hedin	148	eeprom_write(0, (global_time_interval/60));
368			eeprom_write(1, global_sms_counter>>8);
369			eeprom_write(2, global_sms_counter);
370			eeprom_write(3, len);
371
372			for (i=0; i<len; ++i)
373	hedin	139	{
374	hedin	160	eeprom_write(i+4, global_cell_nr[i] );
375	hedin	139	}
376			}
377	hedin	148
378			void eeprom_reader(void)
379			{
380			char len,i;
381	hedin	109
382	hedin	148	global_time_interval = eeprom_read(0);
383			global_time_interval *= 60;
384			global_sms_counter = (eeprom_read(1)<<8) \| eeprom_read(2);
385			len = eeprom_read(3);
386
387			for (i=0; i<len; ++i)
388			{
389	hedin	160	global_cell_nr[i] = eeprom_read(i+4);
390	hedin	148	}
391
392	hedin	160	global_cell_nr[i] = 0; //zero terminated!
393	hedin	148	}
394
395	hedin	150
396	hedin	148	void on_recieve(void)
397			{
398	hedin	160	char tmp[3];
399	hedin	151	char* ptr;
400			tmp[0]=0;
401
402	hedin	160	if (global_recieve_done == 0 \|\| global_message_buffer_length1 == 0)
403	hedin	150	return;
404	hedin	151
405	hedin	160	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	hedin	151
422	hedin	160	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	hedin	151	{
432	hedin	160	buf[i] = global_message_buffer2[i];
433	hedin	150	}
434	hedin	160
435			buf[i] = 0;
436			imei = atoi(buf);
437
438			if (imei == global_imei_tversum)
439	hedin	155	{
440	hedin	160	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	hedin	155	}
461	hedin	148
462
463	hedin	155	}
464
465	hedin	175	void Delay(int time)
466			{
467			int wanted = (global_time_counter + time) % global_time_interval;
468
469			while (global_time_counter < wanted) ;
470			}
471	hedin	160
472	hedin	82	void main()
473			{
474	hedin	148	////////////////////
475			// Running Init's //
476	hedin	109
477			// Running init for various components.
478	hedin	148	pic18_io_init();
479	hedin	160	RA5 = 1; // Indicates that the board is running inits.
480
481	hedin	148	rs232_init();
482	hedin	109	ad_init();
483			lcd_init(0);
484	hedin	175	lcd_clear();
485			lcd_home();
486	hedin	137	interrupt_init();
487	hedin	173	timer_init();
488	hedin	139	sms_init();
489	hedin	148	eeprom_reader();
490			///////////////
491			// Main loop //
492	hedin	150
493	hedin	151	DelayMs(50);
494			reset_recieve_buffer();
495	hedin	150
496	hedin	160	RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
497
498	hedin	109	while(1)
499	hedin	100	{
500	hedin	148	// If there happends to be a critical state on the system, we send a sms.
501	hedin	173	if( (global_temp >= 90 \|\| PWRFAIL == 1 \|\| FIREDET == 0 \|\| FEEDING ==1 ) && global_emergency_counter >= 600 )
502	hedin	148	{
503			send_update();
504			global_emergency_counter = 0;
505			}
506	hedin	175
507	hedin	148	// Every X sec. a status sms is send.
508	hedin	175	if(global_time_counter >= global_time_interval)
509	hedin	148	{
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	hedin	109	// 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	hedin	178	convert_temp();
529	hedin	165	update_lcd();
530	hedin	112	GODONE = 1;
531	hedin	109	}
532	hedin	151	// Handels the recieve sms'es.
533			on_recieve();
534	hedin	100	}
535	hedin	82	}