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 SEND_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[SEND_BUFFER], global_serial_recieve_buffer[SEND_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 cell_nr[15] = ""; // = "21681784";
    28: 
    29: 
    30: __EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
    31: __EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
    32: 
    33: void serial_recieved(void);
    34: void serial_send(void);
    35: void update_lcd(void);
    36: void convertTemp(void);
    37: void timer1_interrupt(void);
    38: 
    39: // Nicked from H7
    40: void ad_init(void)
    41: {
    42:         // AD Conversion clock
    43:         ADCS0 = 0;
    44:         ADCS1 = 0;
    45:         ADCS2 = 0;
    46: 
    47:         //Select AN0/RA0 for AD source
    48:                 // In this (000) setup, it's only RA0/AN0 that does ad convertion.
    49:         CHS0=0;
    50:         CHS1=0;
    51:         CHS2=0;
    52:         
    53:         //Only AN0 is selected for AD and with Vdd/Vss as limits
    54:         PCFG0=0;
    55:         PCFG1=1;
    56:         PCFG2=1;
    57:         PCFG3=1;
    58:         
    59:         //Result is right justified
    60:         ADFM=1; 
    61:         
    62:         //Fire up for A/D converter module
    63:         ADON=1;
    64: }
    65: 
    66: void rs232_init(void)
    67: {
    68:         SPEN    = 0;    // Serial Port Enable Bit... 0 = disabled
    69:         TRISC6  = 0;    
    70:         TRISC7  = 1;
    71: 
    72:         SPBRG   = 207;  // 1200 baud rate... 25 = 9600
    73:                                         // x = (Fosc / (16*[baud rate]) )-1
    74:         TXSTA   = 0x24; // Enables BRGH and TXEN inthe TXSTA register
    75:         RCSTA   = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
    76: }
    77: 
    78: void interrupt_init(void)
    79: {
    80:         // Assumes that all interrupts default is 0
    81:         PEIE    = 1;
    82:         GIE             = 1;
    83:         RCIE    = 1;    // Recieve interrupt enable.
    84:         IPEN    = 0;    // Nfo interrupt priority
    85:         TXIE    = 0;    // Serial interrupt enabled
    86:         TMR1IE  = 1;    // Enables timer 1
    87: }       
    88: 
    89: void timer_init(void)
    90: {
    91:         TMR1CS = 1; //use external clock
    92:         
    93:         T1CKPS1 = 1; //1:8 prescale
    94:         T1CKPS0 = 1;
    95:         
    96:         TMR1H = 0xEF;
    97:         TMR1L = 0xFF;
    98: 
    99:         T1OSCEN = 1; //enable oscillator circuit        
   100:         RD16 = 0; //normal 8 bit writes
   101:         TMR1ON = 1;
   102: }
   103: 
   104: void pic18_io_init(void)
   105: {
   106:         TRISA0  = 1;    // analog input
   107:         TRISA1  = 0;    // Output
   108:         TRISB1  = 1;    // TRISB1-4 Digital input
   109:         TRISB2  = 1;
   110:         TRISB3  = 1;
   111:         TRISB4  = 1;
   112: }       
   113: 
   114: void sms_init(void)
   115: {
   116:         int i;
   117: 
   118:         sprintf(global_serial_send,"at+cgsn\r");
   119:         serial_send();
   120:         DelaySek(1);
   121:         while(!global_recieve_done) ;
   122: 
   123: 
   124:         sprintf(global_serial_send,"%s", "at+cpin=8043\r");
   125:         serial_send();
   126:         DelaySek(30);
   127:         
   128:         update_lcd();
   129:         DelaySek(5);
   130: }
   131: 
   132: 
   133: void interrupt interrupt_handler(void)
   134: {
   135:         // Finds out what interrupt have been trigged, and starts the respective function.
   136:         if(RCIF == 1)                   // Serial recieve interrupt
   137:         {
   138:                 serial_recieved();
   139:                 RCIF = 0;
   140:         }
   141:         
   142:         if(TMR1IF == 1)                 // timer1 interrupt trigger.
   143:         {
   144:                 timer1_interrupt();
   145:                 TMR1IF = 0;
   146:         }
   147: }               
   148: 
   149: 
   150: void serial_send(void)
   151: {
   152:         int i;
   153:         char data_byte;
   154:         for(i = 0; i < SEND_BUFFER; i++)
   155:         {
   156:                 data_byte = global_serial_send[i];
   157:                 if( data_byte == '\r')
   158:                         i = (SEND_BUFFER - 1);
   159:                 TXREG = data_byte;
   160:                 while(TRMT==0) ;
   161:                 DelayMs(10);
   162:         }
   163:         DelayMs(250);
   164:         DelayMs(250);
   165: }       
   166: 
   167: void serial_recieved(void)
   168: {
   169:         char data_byte, saved_data[LCD_LENGTH];
   170:         
   171:         data_byte = RCREG;
   172:         
   173:         global_serial_recieve_buffer[global_serial_byte_counter] = data_byte;
   174:         if(data_byte == '\r')
   175:         {
   176:                 global_recieve_done = 1;
   177:                 global_serial_byte_counter = 0;
   178:         }       
   179:         else
   180:         {
   181:                 global_serial_byte_counter++;
   182:         }
   183:         
   184: }
   185: 
   186: void timer1_interrupt(void)
   187: {
   188:         TMR1H = 0xEF;
   189:         TMR1L = 0xFF;
   190:         global_time_counter++;
   191:         global_emergency_counter++;
   192:         RA1 = !RA1;
   193: }
   194: 
   195: void update_lcd(void)
   196: {
   197:         if( global_recieve_done == 1 )
   198:         {
   199:                 lcd_clear();
   200:                 lcd_goto(0x00);
   201:                 lcd_puts(global_serial_recieve_buffer);
   202:                 global_recieve_done = 0;
   203:         }
   204: }
   205:         
   206: void send_update(void)
   207: {
   208:         sprintf(global_serial_send, "at+cmgs=\"%s\"\r", cell_nr);
   209:         serial_send();
   210:         sprintf(global_serial_send, "%d:%d:%d:%d:%d:%d%c", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL, 0x1A);
   211:         lcd_goto(40);
   212:         lcd_puts(global_serial_send);
   213:         serial_send();
   214:         DelayMs(250);
   215:         global_sms_counter++;
   216: }       
   217: 
   218: void convertTemp()
   219: 
   220: {
   221:         short adVal;
   222:         adVal = (global_Pot_Hi << 8) | global_Pot_Lo;
   223:         if( adVal >=840 )
   224:                 global_temp = 100;
   225:         else
   226:                 global_temp = (adVal / 8.3886);
   227: }
   228: 
   229: 
   230: 
   231: void eeprom_writer(void)
   232: {
   233:         char len,i;
   234:         
   235:         if( global_interval_changed )
   236:         {
   237:                 len = strlen(cell_nr);
   238:                 eeprom_write(0, (global_time_interval/60));
   239:                 eeprom_write(1, global_sms_counter>>8);
   240:                 eeprom_write(2, global_sms_counter);
   241:                 eeprom_write(3, len);
   242:                 
   243:                 for (i=0; i<len; ++i)
   244:                 {
   245:                         eeprom_write(i+4, cell_nr[i] );
   246:                 }
   247:                 
   248:                 global_interval_changed = 0;
   249:         }
   250: }
   251: 
   252: void eeprom_reader(void)
   253: {
   254:         char len,i;
   255:         
   256:         global_time_interval = eeprom_read(0);
   257:         global_time_interval *= 60;
   258:         global_sms_counter = (eeprom_read(1)<<8) | eeprom_read(2);
   259:         len = eeprom_read(3);
   260:         
   261:         for (i=0; i<len; ++i)
   262:         {
   263:                 cell_nr[i] = eeprom_read(i+4);
   264:         }
   265:         
   266:         cell_nr[i] = 0; //zero terminated!
   267: }       
   268: 
   269: 
   270: void main()
   271: {
   272: /////////////////////////////////////////////
   273: // Running Init's
   274: 
   275:         // Running init for various components.
   276:         pic18_io_init();
   277:         rs232_init();
   278:         ad_init();
   279:         lcd_init(0);
   280:         interrupt_init();
   281:         sms_init();
   282:         //eeprom_init();
   283:         timer_init();
   284:         eeprom_reader();
   285: /////////////////////////////////////////////
   286: // Main loop
   287: send_update();
   288:         while(1)
   289:         {
   290:                 if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING == 1 || EMPTYTANK == 1) && global_emergency_counter >= 600 )
   291:                 {
   292:                         send_update();
   293:                         global_emergency_counter = 0;
   294:                 }
   295:                 
   296:                 if(global_time_counter >= 3600)
   297:                 {
   298:                         send_update();
   299:                         global_time_counter = 0;
   300:                 }
   301:                 // to avoid buffer overrun.
   302:                 if( global_emergency_counter > 7200 )
   303:                         global_emergency_counter = 600;
   304: 
   305:                 // Checking if A/D convertion is done, and save the data in global_Pot_??
   306:                 if(GODONE==0)
   307:                 {
   308:                         global_Pot_Hi = ADRESH;
   309:                         global_Pot_Lo = ADRESL;
   310:                         convertTemp();
   311:                         
   312:                         GODONE = 1;
   313:                 }
   314:                 
   315:                 update_lcd();
   316:         }
   317: 
   318: }