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