| 1 |
1: #include <pic18.h>
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| 2 |
2: #include <stdio.h>
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| 3 |
3: #include <string.h>
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| 4 |
4: #include "lcd.h"
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| 5 |
5: #include "Delay.h"
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| 6 |
6: // Delay.h is included inside lcd.c
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| 7 |
7:
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| 8 |
8: #define LCD_LENGTH 16
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| 9 |
9: #define LCD_ROWS 2
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| 10 |
10:
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| 11 |
11:
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| 12 |
12: unsigned char global_Pot_Hi, global_Pot_Lo;
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| 13 |
13: unsigned char global_LCD_Buffer[LCD_ROWS][LCD_LENGTH];
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| 14 |
14: unsigned char global_serial_data;
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| 15 |
15: unsigned char global_serial_recieve_buffer[LCD_LENGTH];
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| 16 |
16: bit global_recieve_done = 0;
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| 17 |
17: int global_serial_byte_counter = 0;
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| 18 |
18:
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| 19 |
19: void serial_recieved(void);
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| 20 |
20:
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| 21 |
21: // Nicked from H7
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| 22 |
22: void ad_init(void)
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| 23 |
23: {
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| 24 |
24: // AD Conversion clock
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| 25 |
25: ADCS0 = 0;
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| 26 |
26: ADCS1 = 0;
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| 27 |
27: ADCS2 = 0;
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| 28 |
28:
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| 29 |
29: //Select AN0/RA0 for AD source
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| 30 |
30: // In this (000) setup, it's only RA0/AN0 that does ad convertion.
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| 31 |
31: CHS0=0;
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| 32 |
32: CHS1=0;
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| 33 |
33: CHS2=0;
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| 34 |
34:
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| 35 |
35: //Only AN0 is selected for AD and with Vdd/Vss as limits
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| 36 |
36: PCFG0=0;
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| 37 |
37: PCFG1=1;
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| 38 |
38: PCFG2=1;
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| 39 |
39: PCFG3=1;
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| 40 |
40:
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| 41 |
41: //Result is left justified
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| 42 |
42: ADFM=0;
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| 43 |
43:
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| 44 |
44: //Fire up for A/D converter module
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| 45 |
45: ADON=1;
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| 46 |
46: }
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| 47 |
47:
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| 48 |
48: void rs232_init(void)
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| 49 |
49: {
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| 50 |
50: SPEN = 0; // Serial Port Enable Bit... 0 = disabled
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| 51 |
51: TRISC6 = 0;
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| 52 |
52: TRISC7 = 1;
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| 53 |
53:
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| 54 |
54: SPBRG = 207; // 1200 baud rate... 25 = 9600
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| 55 |
55: // x = (Fosc / (16*[baud rate]) )-1
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| 56 |
56: TXSTA = 0x24; // Enables BRGH and TXEN inthe TXSTA register
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| 57 |
57: RCSTA = 0x90; // 0x90 enables SPEN and CREN in the RCSTA register
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| 58 |
58: }
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| 59 |
59:
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| 60 |
60: void interrupt_init(void)
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| 61 |
61: {
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| 62 |
62: // Assumes that all interrupts default is 0
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| 63 |
63: PEIE = 1;
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| 64 |
64: GIE = 1;
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| 65 |
65: RCIE = 1; // Recieve interrupt enable.
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| 66 |
66: IPEN = 0; // Nfo interrupt priority
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| 67 |
67: TXIE = 0; // Serial interrupt enabled
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| 68 |
68: }
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| 69 |
69:
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| 70 |
70: void pic18_io_init(void)
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| 71 |
71: {
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| 72 |
72: TRISA0 = 1; // analog input
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| 73 |
73: TRISB1 = 1; // TRISB1-4 Digital input
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| 74 |
74: TRISB2 = 1;
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| 75 |
75: TRISB3 = 1;
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| 76 |
76: TRISB4 = 1;
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| 77 |
77: }
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| 78 |
78:
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| 79 |
79:
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| 80 |
80:
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| 81 |
81: void interrupt interrupt_handler(void)
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| 82 |
82: {
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| 83 |
83: // Finds out what interrupt have been trigged, and starts the respective function.
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| 84 |
84: if(RCIF == 1) // Serial recieve interrupt
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| 85 |
85: {
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| 86 |
86: serial_recieved();
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| 87 |
87: RCIF = 0;
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| 88 |
88: }
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| 89 |
89: }
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| 90 |
90:
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| 91 |
91:
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| 92 |
92:
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| 93 |
93: void serial_send(void)
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| 94 |
94: {
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| 95 |
95: int i;
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| 96 |
96: char tosend[3];
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| 97 |
97: char data;
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| 98 |
98: sprintf(tosend,"%s", "at\r");
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| 99 |
99: for(i = 0; i < 3; i++)
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| 100 |
100: {
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| 101 |
101: data = tosend[i];
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| 102 |
102: TXREG = data;
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| 103 |
103: while(TRMT==0)
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| 104 |
104: DelayMs(1000);
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| 105 |
105: }
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| 106 |
106: }
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| 107 |
107:
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| 108 |
108: void serial_recieved(void)
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| 109 |
109: {
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| 110 |
110: char data, saved_data[LCD_LENGTH];
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| 111 |
111:
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| 112 |
112: data = RCREG;
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| 113 |
113:
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| 114 |
114: global_serial_recieve_buffer[global_serial_byte_counter] = data;
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| 115 |
115: if(data == '\r')
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| 116 |
116: {
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| 117 |
117: global_recieve_done = 1;
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| 118 |
118: global_serial_byte_counter = 0;
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| 119 |
119: }
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| 120 |
120: else
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| 121 |
121: {
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| 122 |
122: global_serial_byte_counter++;
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| 123 |
123: }
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| 124 |
124:
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| 125 |
125: }
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| 126 |
126:
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| 127 |
127: void main()
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| 128 |
128: {
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| 129 |
129: /////////////////////////////////////////////
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| 130 |
130: // Running Init's
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| 131 |
131:
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| 132 |
132: // Running init for various components.
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| 133 |
133: //AD_init();
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| 134 |
134: ad_init();
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| 135 |
135: rs232_init();
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| 136 |
136: pic18_io_init();
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| 137 |
137: lcd_init(0);
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| 138 |
138: interrupt_init();
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| 139 |
139:
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| 140 |
140: /////////////////////////////////////////////
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| 141 |
141: // Main loop
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| 142 |
142:
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| 143 |
143: while(1)
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| 144 |
144: {
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| 145 |
145: DelayMs(3000);
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| 146 |
146: serial_send();
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| 147 |
147: // Checking if A/D convertion is done, and save the data in global_Pot_??
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| 148 |
148: if(GODONE==0)
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| 149 |
149: {
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| 150 |
150: global_Pot_Hi = ADRESH;
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| 151 |
151: global_Pot_Lo = ADRESL;
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| 152 |
152: GODONE = 1;
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| 153 |
153: }
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| 154 |
154:
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| 155 |
155: if( global_recieve_done == 1 )
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| 156 |
156: {
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| 157 |
157: lcd_clear();
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| 158 |
158: lcd_goto(0x00);
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| 159 |
159: lcd_puts(global_serial_recieve_buffer);
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| 160 |
160: }
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| 161 |
161: //update_lcd();
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| 162 |
162: }
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| 163 |
163: }
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