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#include <pic18.h>
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#include <stdio.h>
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#include <htc.h>
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#include <string.h>
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#include <stdlib.h>
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#include "lcd.h"
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#include "Delay.h"
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// Delay.h is included inside lcd.c
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#define LCD_LENGTH 16
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#define LCD_ROWS 2
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#define BUFFER 128
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#define PWRFAIL RB1
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#define FIREDET RB2
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#define FEEDING RB3
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#define EMPTYTANK RB4
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unsigned char global_Pot_Hi, global_Pot_Lo;
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unsigned char global_serial_send[BUFFER], global_serial_recieve_buffer[BUFFER];
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bit global_recieve_done = 0, global_interval_changed = 0;
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unsigned int global_serial_byte_counter = 0, global_sms_counter = 1, global_time_counter = 0;
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unsigned int global_emergency_counter = 600, global_time_interval = 3600;
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unsigned char global_temp = 0;
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unsigned char global_temp_update_display = 0;
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unsigned char global_message_buffer1[BUFFER];
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unsigned char global_message_buffer2[BUFFER];
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unsigned char global_message_buffer_length1;
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unsigned char global_message_buffer_length2;
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unsigned char global_lcd_buf[16];
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unsigned short global_imei_tversum;
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unsigned char global_cell_nr[15] = ""; // = "21681784";
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bit global_modem_init = 0;
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bit global_has_imei = 0;
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unsigned char global_sms_recieve_number[3];
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__EEPROM_DATA( 60, 0, 1, 8, '2', '1', '6', '8');
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__EEPROM_DATA( '1', '7', '8', '4',0,0,0,0);
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void serial_recieved(void);
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void serial_send(void);
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void update_lcd(void);
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void convertTemp(void);
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void timer1_interrupt(void);
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void on_recieve(void);
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void on_initial_recieve(void);
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void sms_recieved(void);
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void send_sms(const unsigned char* payload);
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void reset_recieve_buffer(void)
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{
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global_recieve_done = 0;
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global_message_buffer_length1 = 0;
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//global_message_buffer1[0] = 0;
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global_message_buffer_length2 = 0;
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//global_message_buffer2[0] = 0;
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memset(global_message_buffer1, 0, BUFFER);
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memset(global_message_buffer2, 0, BUFFER);
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}
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void pic18_io_init(void)
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{
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TRISA0 = 1; // analog input
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TRISA5 = 0; // Output
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TRISB1 = 1; // TRISB1-4 Digital input
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TRISB2 = 1;
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TRISB3 = 1;
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TRISB4 = 1;
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}
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void ad_init(void) // Nicked from H7
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{
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// AD Conversion clock
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ADCS0 = 0;
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ADCS1 = 0;
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ADCS2 = 0;
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//Select AN0/RA0 for AD source
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// In this (000) setup, it's only RA0/AN0 that does ad convertion.
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CHS0=0;
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CHS1=0;
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CHS2=0;
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//Only AN0 is selected for AD and with Vdd/Vss as limits
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PCFG0=0;
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PCFG1=1;
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PCFG2=1;
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PCFG3=1;
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//Result is right justified
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ADFM=1;
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//Fire up for A/D converter module
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ADON=1;
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}
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void rs232_init(void)
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{
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SPEN = 0; // Serial Port Enable Bit... 0 = disabled
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TRISC6 = 0;
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TRISC7 = 1;
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SPBRG = 207; // 1200 baud rate... 25 = 9600
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// x = (Fosc / (16*[baud rate]) )-1
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TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
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RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
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}
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void interrupt_init(void)
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{
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// Assumes that all interrupts default is 0
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PEIE = 1;
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GIE = 1;
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RCIE = 1; // Recieve interrupt enable.
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IPEN = 0; // Nfo interrupt priority
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TXIE = 0; // Serial interrupt enabled
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TMR1IE = 1; // Enables timer 1
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}
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void timer_init(void)
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{
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TMR1CS = 1; //use external clock
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T1CKPS1 = 1; //1:8 prescale
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T1CKPS0 = 1;
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TMR1H = 0xEF;
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TMR1L = 0xFF;
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T1OSCEN = 1; //enable oscillator circuit
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RD16 = 0; //normal 8 bit writes
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TMR1ON = 1;
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}
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void sms_init(void)
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{
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int i;
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char buf[2];
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reset_recieve_buffer();
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sprintf(global_serial_send,"at+cgsn\r");
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serial_send();
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DelaySek(1);
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//while(!global_recieve_done) ;
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while (global_has_imei == 0)
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{
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if (strstr(global_message_buffer1,"OK") != 0)
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{
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global_imei_tversum = 0;
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for (i=0; i<15; ++i)
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{
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buf[0] = global_message_buffer2[i];
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buf[1] = 0;
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global_imei_tversum += atoi(buf);
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//global_imei_tversum += (global_message_buffer2[i] - '0');
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}
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global_has_imei = 1;
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}
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}
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sprintf(global_serial_send,"%s", "at+cpin=8043\r");
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serial_send();
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while(global_modem_init == 0)
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{
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on_initial_recieve();
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}
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DelayMs(5);
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reset_recieve_buffer();
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sprintf(global_serial_send, "at+cmgd=1,4\r");
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serial_send();
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while ( strstr(global_message_buffer1,"OK") == 0) ;
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}
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void interrupt interrupt_handler(void)
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{
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// Finds out what interrupt have been trigged, and starts the respective function.
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if(RCIF == 1) // Serial recieve interrupt
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{
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serial_recieved();
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RCIF = 0;
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}
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if(TMR1IF == 1) // timer1 interrupt trigger.
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{
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timer1_interrupt();
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TMR1IF = 0;
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}
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}
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void serial_send(void)
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{
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int i;
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char data_byte;
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for(i = 0; i < BUFFER; i++)
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{
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data_byte = global_serial_send[i];
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if( data_byte == '\r')
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i = (BUFFER - 1);
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TXREG = data_byte;
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while(TRMT==0) ;
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DelayMs(10);
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}
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DelayMs(150);
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global_serial_send[0] = 0;
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DelayMs(150);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Takes the recieving data and fills it in a buffer, when we meet a '\r' we fill the data from,
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// global_serial_recieve_buffer, to global_message_buffer1, and sets the flag global_recieve_done.
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void serial_recieved(void)
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{
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char data_byte;
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data_byte = RCREG;
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if (data_byte == '\n') // Cant be bothered to do anyting if the byte is a '\n'.
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return;
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if (global_serial_byte_counter == 0 && data_byte == '\r') // don't care about '\r', if it's the first byte we recieve.
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return;
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if ( global_serial_byte_counter < BUFFER) //Prevent buffer overrun
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global_serial_recieve_buffer[ global_serial_byte_counter++ ] = data_byte; // fills the data_byte into our buffer.
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if (data_byte == '\r') // when we meet a '\r', the transmission is done, and we fill the constxt of
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// global_message_buffer1 into global_message_buffer2 our main buffer into
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// global_message_buffer2, and the same with our recieve buffer, global_serial_recieve_buffer
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// into global_message_buffer1.
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{
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global_recieve_done = 1; // indicates the recieve transmission is done.
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global_serial_recieve_buffer[global_serial_byte_counter] = 0; //zero terminate
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// global_message_buffer1 -> global_message_buffer2
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strcpy(global_message_buffer2, global_message_buffer1);
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global_message_buffer_length2 = global_message_buffer_length1;
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// global_serial_recieve_buffer -> global_message_buffer1
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strcpy(global_message_buffer1, global_serial_recieve_buffer);
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global_message_buffer_length1 = global_serial_byte_counter;
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global_serial_byte_counter = 0;
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}
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}
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void timer1_interrupt(void)
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{
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TMR1H = 0xEF;
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TMR1L = 0xFF;
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global_time_counter++;
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global_emergency_counter++;
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RA1 = !RA1;
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}
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void update_lcd(void)
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{
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if(global_temp_update_display != global_time_counter)
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{
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lcd_clear();
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lcd_goto(0x00);
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sprintf(global_lcd_buf, "Temp: %3d", global_temp);
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lcd_puts(global_lcd_buf);
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global_temp_update_display = global_time_counter;
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}
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}
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void send_update(void)
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{
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char update[40];
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sprintf(update, "%d:%d:%d:%d:%d:%d", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL);
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send_sms(update);
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global_sms_counter++;
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}
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void send_sms(const unsigned char* payload)
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{
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sprintf(global_serial_send, "at+cmgs=\"%s\"\r", global_cell_nr);
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serial_send();
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sprintf(global_serial_send, "%s%c", payload, 0x1A);
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serial_send();
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DelayMs(150);
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}
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void convertTemp()
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{
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short adVal;
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adVal = (global_Pot_Hi << 8) | global_Pot_Lo;
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if( adVal >=840 )
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global_temp = 100;
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else
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global_temp = (unsigned char) (adVal / 8.3886);
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}
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void eeprom_writer(void)
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{
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char len,i;
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len = strlen(global_cell_nr);
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eeprom_write(0, (global_time_interval/60));
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eeprom_write(1, global_sms_counter>>8);
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eeprom_write(2, global_sms_counter);
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eeprom_write(3, len);
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for (i=0; i<len; ++i)
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{
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eeprom_write(i+4, global_cell_nr[i] );
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}
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}
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void eeprom_reader(void)
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{
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char len,i;
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global_time_interval = eeprom_read(0);
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global_time_interval *= 60;
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global_sms_counter = (eeprom_read(1)<<8) | eeprom_read(2);
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len = eeprom_read(3);
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for (i=0; i<len; ++i)
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{
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global_cell_nr[i] = eeprom_read(i+4);
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}
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global_cell_nr[i] = 0; //zero terminated!
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}
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void on_initial_recieve(void)
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{
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char imei[16];
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char* ptr;
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char i;
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char buf[2];
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if (strstr(global_serial_recieve_buffer,"+WIND: 11") != 0)
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{
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global_modem_init = 1;
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ptr = strstr(global_serial_recieve_buffer,"cgsn");
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ptr +=4;
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strncpy(imei, ptr,15);
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imei[15] = 0;
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reset_recieve_buffer();
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}
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}
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void on_recieve(void)
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{
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char tmp[3];
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char* ptr;
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tmp[0]=0;
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if (global_recieve_done == 0 || global_message_buffer_length1 == 0)
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return;
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if (strstr(global_message_buffer1,"CMTI") != 0) // here we handles a incomming SMS
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{
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ptr = strstr(global_message_buffer1,","); // finds the point just before the nr. of the SMS.
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strcat(tmp,ptr+1); // puts that number in tmp
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global_sms_recieve_number[0] = 0; // wanna be sure that we write the new number from global_sms_recieve_number[0]
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strcat(global_sms_recieve_number, tmp); // puts the sms number into the global variable.
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sms_recieved();
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}
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reset_recieve_buffer();
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}
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void sms_recieved(void)
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{
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char buf[4];
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char i,imei;
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char pos;
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sprintf(global_serial_send, "AT+CMGR=%s\r", global_sms_recieve_number); // formates the variable that sends commands to the SMS modem.
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serial_send(); // Sends the command.
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while(strstr(global_message_buffer1, "OK") == 0) // stays here until we recieve a "OK" from the modem.
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DelayMs(1);
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DelayUs(10);
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for (i=0; global_message_buffer2[i] != ':' && global_message_buffer2[i] != 0; ++i)
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{
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buf[i] = global_message_buffer2[i];
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}
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buf[i] = 0;
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imei = atoi(buf);
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if (imei == global_imei_tversum)
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{
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i++; //spring over ':'
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pos = 0;
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for ( ; global_message_buffer2[i] != ':'; ++i, ++pos)
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{
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global_cell_nr[pos] = global_message_buffer2[i];
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}
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global_cell_nr[pos] = 0; //zero terminator
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i++; //spring over ':'
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pos=0;
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for ( ; global_message_buffer2[i] ; ++i,++pos)
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{
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buf[pos] = global_message_buffer2[i];
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}
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buf[pos]=0;
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global_time_interval = atoi(buf);
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global_time_interval *= 60;
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eeprom_writer(); // writes the new cell nr. and time interval to the eeprom.
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send_sms("conf ok");
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}
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}
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void main()
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{
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450 |
////////////////////
|
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// Running Init's //
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452 |
|
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// Running init for various components.
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454 |
pic18_io_init();
|
455 |
RA5 = 1; // Indicates that the board is running inits.
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457 |
rs232_init();
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ad_init();
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lcd_init(0);
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interrupt_init();
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sms_init();
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//eeprom_init();
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463 |
timer_init();
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eeprom_reader();
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///////////////
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// Main loop //
|
467 |
|
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DelayMs(50);
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469 |
reset_recieve_buffer();
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470 |
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RA5 = 0; // Inits are done, and RA1 will now work as a error notifier.
|
472 |
|
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while(1)
|
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{
|
475 |
// If there happends to be a critical state on the system, we send a sms.
|
476 |
if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING == 1 || EMPTYTANK == 1) && global_emergency_counter >= 600 )
|
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{
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478 |
send_update();
|
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global_emergency_counter = 0;
|
480 |
}
|
481 |
// Every X sec. a status sms is send.
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482 |
if(global_time_counter >= 3600)
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483 |
{
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484 |
send_update();
|
485 |
global_time_counter = 0;
|
486 |
}
|
487 |
// To avoid buffer overrun.
|
488 |
if( global_emergency_counter > 7200 )
|
489 |
global_emergency_counter = 600;
|
490 |
|
491 |
// Checks if there has been recieved a config sms.
|
492 |
if(global_interval_changed )
|
493 |
{
|
494 |
eeprom_writer();
|
495 |
global_interval_changed = 0;
|
496 |
}
|
497 |
// Checking if A/D convertion is done, and save the data in global_Pot_??
|
498 |
if(GODONE==0)
|
499 |
{
|
500 |
global_Pot_Hi = ADRESH;
|
501 |
global_Pot_Lo = ADRESL;
|
502 |
convertTemp();
|
503 |
update_lcd();
|
504 |
GODONE = 1;
|
505 |
}
|
506 |
// Handels the recieve sms'es.
|
507 |
on_recieve();
|
508 |
}
|
509 |
}
|