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