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