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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 "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 SEND_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_LCD_Buffer[LCD_ROWS][LCD_LENGTH];
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unsigned char global_serial_send[SEND_BUFFER], global_serial_recieve_buffer[SEND_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 cell_nr[15] = ""; // = "21681784";
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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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// Nicked from H7
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void ad_init(void)
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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 pic18_io_init(void)
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{
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TRISA0 = 1; // analog input
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TRISA1 = 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 sms_init(void)
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{
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int i;
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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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sprintf(global_serial_send,"%s", "at+cpin=8043\r");
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serial_send();
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DelaySek(30);
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update_lcd();
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DelaySek(5);
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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 < SEND_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 = (SEND_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(250);
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DelayMs(250);
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}
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void serial_recieved(void)
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{
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char data_byte, saved_data[LCD_LENGTH];
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data_byte = RCREG;
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global_serial_recieve_buffer[global_serial_byte_counter] = data_byte;
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if(data_byte == '\r')
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{
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global_recieve_done = 1;
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global_serial_byte_counter = 0;
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}
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else
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{
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global_serial_byte_counter++;
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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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lcd_clear();
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lcd_goto(0x00);
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lcd_puts(global_temp);
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}
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void send_update(void)
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{
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sprintf(global_serial_send, "at+cmgs=\"%s\"\r", cell_nr);
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serial_send();
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sprintf(global_serial_send, "%d:%d:%d:%d:%d:%d%c", global_sms_counter, global_temp, FIREDET, EMPTYTANK, FEEDING, PWRFAIL, 0x1A);
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lcd_goto(40);
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lcd_puts(global_serial_send);
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serial_send();
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DelayMs(250);
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global_sms_counter++;
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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 = (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(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, 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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cell_nr[i] = eeprom_read(i+4);
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}
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cell_nr[i] = 0; //zero terminated!
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}
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void on_recieve(void)
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{
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}
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void main()
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{
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////////////////////
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// Running Init's //
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// Running init for various components.
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pic18_io_init();
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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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timer_init();
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eeprom_reader();
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///////////////
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// Main loop //
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send_update();
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while(1)
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{
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// If there happends to be a critical state on the system, we send a sms.
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if( (global_temp >= 90 || PWRFAIL == 1 || FIREDET == 0 || FEEDING == 1 || EMPTYTANK == 1) && global_emergency_counter >= 600 )
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{
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send_update();
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global_emergency_counter = 0;
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}
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// Every X sec. a status sms is send.
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if(global_time_counter >= 3600)
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{
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send_update();
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global_time_counter = 0;
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}
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// To avoid buffer overrun.
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if( global_emergency_counter > 7200 )
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global_emergency_counter = 600;
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// Checks if there has been recieved a config sms.
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if(global_interval_changed )
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{
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eeprom_writer();
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global_interval_changed = 0;
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}
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// Checking if A/D convertion is done, and save the data in global_Pot_??
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if(GODONE==0)
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{
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global_Pot_Hi = ADRESH;
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global_Pot_Lo = ADRESL;
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convertTemp();
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update_lcd();
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GODONE = 1;
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}
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}
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}
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