1: #include <pic18.h>
     2: #include <stdio.h>
     3: #include <htc.h>
     4: #include <string.h>
     5: 
     6: #include "lcd.h"
     7: #include "Delay.h"
     8: // Delay.h is included inside lcd.c
     9: 
    10: #define LCD_LENGTH 16
    11: #define LCD_ROWS 2
    12: #define BUFFER 128
    13: #define PWRFAIL RB1
    14: #define FIREDET RB2
    15: #define FEEDING RB3
    16: #define EMPTYTANK RB4
    17: 
    18: 
    19: unsigned char global_Pot_Hi, global_Pot_Lo;
    20: unsigned char global_LCD_Buffer[LCD_ROWS][LCD_LENGTH];
    21: unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
    22: bit global_recieve_done = 0, global_interval_changed = 0;
    23: unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0;
    24: unsigned int global_emergency_counter = 600, global_time_interval = 3600;
    25: unsigned char global_temp = 0;
    26: 
    27: unsigned char global_lcd_buf[16];
    28: 
    29: unsigned short global_imei_tversum;
    30: 
    31: unsigned char cell_nr[15] = ""; // = "21681784";
    32: bit global_modem_init = 0;
    33: 
    34: __EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
    35: __EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
    36: 
    37: void serial_recieved(void);
    38: void serial_send(void);
    39: void update_lcd(void);
    40: void convertTemp(void);
    41: void timer1_interrupt(void);
    42: void on_recieve(void);
    43: void on_initial_recieve(void);
    44: 
    45: 
    46: void reset_recieve_buffer(void)
    47: {
    48:         global_recieve_done = 0; 
    49:         global_serial_byte_counter=0;
    50: }       
    51: 
    52: 
    53: void ad_init(void) // Nicked from H7
    54: {
    55:         // AD Conversion clock
    56:         ADCS0 = 0;
    57:         ADCS1 = 0;
    58:         ADCS2 = 0;
    59: 
    60:         //Select AN0/RA0 for AD source
    61:                 // In this (000) setup, it's only RA0/AN0 that does ad convertion.
    62:         CHS0=0;
    63:         CHS1=0;
    64:         CHS2=0;
    65:         
    66:         //Only AN0 is selected for AD and with Vdd/Vss as limits
    67:         PCFG0=0;
    68:         PCFG1=1;
    69:         PCFG2=1;
    70:         PCFG3=1;
    71:         
    72:         //Result is right justified
    73:         ADFM=1; 
    74:         
    75:         //Fire up for A/D converter module
    76:         ADON=1;
    77: }
    78: 
    79: void rs232_init(void)
    80: {
    81:         SPEN    = 0;    // Serial Port Enable Bit... 0 = disabled
    82:         TRISC6  = 0;    
    83:         TRISC7  = 1;
    84: 
    85:         SPBRG   = 207;  // 1200 baud rate... 25 = 9600
    86:                                         // x = (Fosc / (16*[baud rate]) )-1
    87:         TXSTA   = 0x24; // Enables BRGH and TXEN inthe TXSTA register
    88:         RCSTA   = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
    89: }
    90: 
    91: void interrupt_init(void)
    92: {
    93:         // Assumes that all interrupts default is 0
    94:         PEIE    = 1;
    95:         GIE             = 1;
    96:         RCIE    = 1;    // Recieve interrupt enable.
    97:         IPEN    = 0;    // Nfo interrupt priority
    98:         TXIE    = 0;    // Serial interrupt enabled
    99:         TMR1IE  = 1;    // Enables timer 1
   100: }       
   101: 
   102: void timer_init(void)
   103: {
   104:         TMR1CS = 1; //use external clock
   105:         
   106:         T1CKPS1 = 1; //1:8 prescale
   107:         T1CKPS0 = 1;
   108:         
   109:         TMR1H = 0xEF;
   110:         TMR1L = 0xFF;
   111: 
   112:         T1OSCEN = 1; //enable oscillator circuit        
   113:         RD16 = 0; //normal 8 bit writes
   114:         TMR1ON = 1;
   115: }
   116: 
   117: void pic18_io_init(void)
   118: {
   119:         TRISA0  = 1;    // analog input
   120:         TRISA1  = 0;    // Output
   121:         TRISB1  = 1;    // TRISB1-4 Digital input
   122:         TRISB2  = 1;
   123:         TRISB3  = 1;
   124:         TRISB4  = 1;
   125: }       
   126: 
   127: void sms_init(void)
   128: {
   129:         int i;
   130: 
   131:         reset_recieve_buffer();
   132:         sprintf(global_serial_send,"at+cgsn\r");
   133:         serial_send();
   134:         DelaySek(1);
   135:         while(!global_recieve_done) ;
   136: 
   137: 
   138:         sprintf(global_serial_send,"%s", "at+cpin=8043\r");
   139:         serial_send();
   140:         
   141:         while(global_modem_init == 0)
   142:         {
   143:                 on_initial_recieve();
   144:         }
   145: }
   146: 
   147: 
   148: void interrupt interrupt_handler(void)
   149: {
   150:         // Finds out what interrupt have been trigged, and starts the respective function.
   151:         if(RCIF == 1)                   // Serial recieve interrupt
   152:         {
   153:                 serial_recieved();
   154:                 RCIF = 0;
   155:         }
   156:         
   157:         if(TMR1IF == 1)                 // timer1 interrupt trigger.
   158:         {
   159:                 timer1_interrupt();
   160:                 TMR1IF = 0;
   161:         }
   162: }               
   163: 
   164: 
   165: void serial_send(void)
   166: {
   167:         int i;
   168:         char data_byte;
   169:         for(i = 0; i < BUFFER; i++)
   170:         {
   171:                 data_byte = global_serial_send[i];
   172:                 if( data_byte == '\r')
   173:                         i = (BUFFER - 1);
   174:                 TXREG = data_byte;
   175:                 while(TRMT==0) ;
   176:                 DelayMs(10);
   177:         }
   178:         DelayMs(250);
   179:         DelayMs(250);
   180: }       
   181: 
   182: void serial_recieved(void)
   183: {
   184:         char data_byte, saved_data[LCD_LENGTH];
   185:         
   186:         data_byte = RCREG;
   187:         
   188:         if (data_byte == '\n')
   189:                 return;
   190:                 
   191:         if (global_serial_byte_counter == 0 && data_byte == '\r')
   192:                 return;
   193: 
   194:         global_serial_recieve_buffer[global_serial_byte_counter] = data_byte;
   195:                 
   196:         if (data_byte == '\r')
   197:         {
   198:                 global_recieve_done = 1;
   199:                 //global_serial_byte_counter = 0;
   200:                 global_serial_recieve_buffer[global_serial_byte_counter+1] = 0; //zero terminate
   201:         }       
   202:         else
   203:         {
   204:                 global_serial_byte_counter++;
   205:         }
   206:         
   207: }
   208: 
   209: void timer1_interrupt(void)
   210: {
   211:         TMR1H = 0xEF;
   212:         TMR1L = 0xFF;
   213:         global_time_counter++;
   214:         global_emergency_counter++;
   215:         RA1 = !RA1;
   216: }
   217: 
   218: void update_lcd(void)
   219: {
   220:         lcd_clear();
   221:         lcd_goto(0x00);
   222:         
   223:         sprintf(global_lcd_buf, "%d", global_temp);
   224:         lcd_puts(global_lcd_buf);
   225: 
   226: }
   227:         
   228: void send_update(void)
   229: {
   230:         sprintf(global_serial_send, "at+cmgs=\"%s\"\r", cell_nr);
   231:         serial_send();
   232:         sprintf(global_serial_send, "%d:%d:%d:%d:%d:%d%c", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL, 0x1A);
   233:         lcd_goto(40);
   234:         lcd_puts(global_serial_send);
   235:         serial_send();
   236:         DelayMs(250);
   237:         global_sms_counter++;
   238: }       
   239: 
   240: void convertTemp()
   241: {
   242:         short adVal;
   243:         adVal = (global_Pot_Hi << 8) | global_Pot_Lo;
   244:         if( adVal >=840 )
   245:                 global_temp = 100;
   246:         else
   247:                 global_temp = (adVal / 8.3886);
   248: }
   249: 
   250: 
   251: 
   252: void eeprom_writer(void)
   253: {
   254:         char len,i;
   255:         
   256:         len = strlen(cell_nr);
   257:         eeprom_write(0, (global_time_interval/60));
   258:         eeprom_write(1, global_sms_counter>>8);
   259:         eeprom_write(2, global_sms_counter);
   260:         eeprom_write(3, len);
   261:         
   262:         for (i=0; i<len; ++i)
   263:         {
   264:                 eeprom_write(i+4, cell_nr[i] );
   265:         }
   266: }
   267: 
   268: void eeprom_reader(void)
   269: {
   270:         char len,i;
   271:         
   272:         global_time_interval = eeprom_read(0);
   273:         global_time_interval *= 60;
   274:         global_sms_counter = (eeprom_read(1)<<8) | eeprom_read(2);
   275:         len = eeprom_read(3);
   276:         
   277:         for (i=0; i<len; ++i)
   278:         {
   279:                 cell_nr[i] = eeprom_read(i+4);
   280:         }
   281:         
   282:         cell_nr[i] = 0; //zero terminated!
   283: }       
   284: 
   285: void on_initial_recieve(void)
   286: {
   287:         char imei[16];
   288:         char* ptr;
   289:         char i;
   290:         
   291:         if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
   292:         {
   293:                 global_modem_init = 1;
   294: 
   295:                 ptr = strstr(global_serial_recieve_buffer,"cgsn");
   296:                 ptr +=4;
   297:                 strncpy(imei, ptr,15);
   298:                 imei[15] = 0;
   299: 
   300:                 global_imei_tversum = 0;
   301:                 for (i=0; i<15; ++i)
   302:                 {
   303:                         global_imei_tversum += (imei[i] - '0');
   304:                 }
   305:                 
   306:                 
   307:                 reset_recieve_buffer();
   308:         }
   309: }
   310: 
   311: 
   312: void on_recieve(void)
   313: {
   314:         char tmp[17];
   315:         char* ptr;
   316:         tmp[0]=0;
   317:                 
   318:         if (global_recieve_done == 0)
   319:                 return;
   320: 
   321:         lcd_goto(0x00);
   322:         lcd_puts(global_serial_recieve_buffer);         
   323:         
   324:         if (strstr(global_serial_recieve_buffer,"CMTI") == 0)
   325:         {
   326:                 ptr = strstr(global_serial_recieve_buffer,"'");
   327:                 strcat(tmp,ptr);
   328: 
   329: 
   330:         lcd_goto(0x40);
   331:         lcd_puts(tmp);
   332:                 
   333:         }
   334:         
   335:         reset_recieve_buffer();
   336: }
   337: 
   338: void main()
   339: {
   340: ////////////////////
   341: // Running Init's //
   342: 
   343:         // Running init for various components.
   344:         pic18_io_init();
   345:         rs232_init();
   346:         ad_init();
   347:         lcd_init(0);
   348:         interrupt_init();
   349:         sms_init();
   350:         //eeprom_init();
   351:         timer_init();
   352:         eeprom_reader();
   353: ///////////////
   354: // Main loop //
   355: 
   356:         DelayMs(50);
   357:         reset_recieve_buffer();
   358: 
   359:         while(1)
   360:         {
   361:         // If there happends to be a critical state on the system, we send a sms.
   362:                 if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING == 1 || EMPTYTANK == 1) && global_emergency_counter >= 600 )
   363:                 {
   364:                         send_update();
   365:                         global_emergency_counter = 0;
   366:                 }
   367:         // Every X sec. a status sms is send.
   368:                 if(global_time_counter >= 3600)
   369:                 {
   370:                         send_update();
   371:                         global_time_counter = 0;
   372:                 }
   373:         // To avoid buffer overrun.
   374:                 if( global_emergency_counter > 7200 )
   375:                         global_emergency_counter = 600;
   376: 
   377:         // Checks if there has been recieved a config sms.
   378:                 if(global_interval_changed )
   379:                 {
   380:                         eeprom_writer();
   381:                         global_interval_changed = 0;
   382:                 }
   383:         // Checking if A/D convertion is done, and save the data in global_Pot_??
   384:                 if(GODONE==0)
   385:                 {
   386:                         global_Pot_Hi = ADRESH;
   387:                         global_Pot_Lo = ADRESL;
   388:                         convertTemp();
   389:                         //update_lcd();
   390:                         GODONE = 1;
   391:                 }
   392:         // Handels the recieve sms'es.
   393:                 on_recieve();
   394:         }
   395: }