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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:
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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:
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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:
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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:
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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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