1 | #include <stdlib.h>
|
2 | #include <avr/io.h>
|
3 | #include <avr/interrupt.h>
|
4 | #include "Diagnose-Terminal.h"
|
5 | #include "lcd_lib.h"
|
6 | #include "uart.h"
|
7 | #include <util/delay.h>
|
8 |
|
9 | #define UART_BAUD_RATE 57400
|
10 | #define NOP(); asm volatile("nop"::);
|
11 | volatile KEY_PRESSED = 0;
|
12 |
|
13 | ISR( TIMER0_OVF_vect )
|
14 | {
|
15 | int col =0;
|
16 | col = key_scan();
|
17 | if(col>0);
|
18 | {
|
19 | PORTB = 0b00000111; // PB0-2 "high"
|
20 | DDRB &= ~ ((1<<DDB0) | (1<<DDB1) | (1<<DDB2)); // PB0-2 Eingang
|
21 |
|
22 | PORTC = 0b00000000; // PC0-7 "low"
|
23 | DDRC |= ((1<<DDC0) | (1<<DDC1) | (1<<DDC2) | (1<<DDC3) | (1<<DDC4) | (1<<DDC5) | (1<<DDC6) | (1<<DDC7)); // PC0-7 Ausgang
|
24 |
|
25 | NOP();
|
26 | }
|
27 |
|
28 | if(col>0)
|
29 | {
|
30 | _delay_ms(50); //debouncing der Keys
|
31 | KEY_PRESSED = col;
|
32 | }
|
33 | }
|
34 |
|
35 | int key_scan(void)
|
36 | {
|
37 | int col=0,row=0;
|
38 |
|
39 | TCNT0 = (uint8_t)(int16_t)-(F_CPU / 1024 * 10e-3 + 0.5); // 10ms Preloading
|
40 |
|
41 | NOP();
|
42 | if(!(PINB & (1<< PINB0)))
|
43 | col = 3;
|
44 | if(!(PINB & (1<< PINB1)))
|
45 | col = 2;
|
46 | if(!(PINB & (1<< PINB2)))
|
47 | col = 1;
|
48 |
|
49 | if(col)
|
50 | {
|
51 | PORTB = 0b00000000; // PB0-2 "low"
|
52 | DDRB |= (1<<DDB0) | (1<<DDB1) | (1<<DDB2); // PB0-2 Ausgang
|
53 |
|
54 | PORTC = 0b11111111; // PC0-7 "high"
|
55 | DDRC &= ~ ((1<<DDC0) | (1<<DDC1) | (1<<DDC2) | (1<<DDC3) | (1<<DDC4) | (1<<DDC5) | (1<<DDC6) | (1<<DDC7)); // PC0-7 Eingang!
|
56 |
|
57 | NOP();
|
58 | _delay_ms(50); // nochmal ein Debounce
|
59 |
|
60 | if(!(PINC & (1<<PINC0)))
|
61 | row = 4;
|
62 | if(!(PINC & (1<<PINC1)))
|
63 | row = 7;
|
64 | if(!(PINC & (1<<PINC2)))
|
65 | row = 10;
|
66 | if(!(PINC & (1<<PINC3)))
|
67 | row = 22;
|
68 | if(!(PINC & (1<<PINC4)))
|
69 | row = 22;
|
70 | if(!(PINC & (1<<PINC5)))
|
71 | row = 19;
|
72 | if(!(PINC & (1<<PINC6)))
|
73 | row = 16;
|
74 | if(!(PINC & (1<<PINC7)))
|
75 | row = 13;
|
76 | }
|
77 | return (row-col);
|
78 | }
|
79 |
|
80 | int main(void)
|
81 | {
|
82 | PORTB = 0b00000111; // PB0-2 high
|
83 | DDRB &= ~ (1<<DDB0) | (1<<DDB1) | (1<<DDB2); // PB0-2 Eingang
|
84 |
|
85 | PORTC = 0b00000000; // PC0-7 low
|
86 | DDRC = 0xff; // PC0-7 Ausgang
|
87 |
|
88 |
|
89 | TCCR0 = (1<<CS02) | (1<<CS00); // Teilen durch 1024 / ~10ms
|
90 | TIMSK |= 1<<TOIE0; // Timer aktivieren
|
91 |
|
92 | lcd_init(LCD_DISP_ON); // LCD Init
|
93 | lcd_clrscr(); // LCD Leeren
|
94 | initialize(); // Init 2 ( Nicht wichtig für euch)
|
95 | uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) ); // UART An
|
96 |
|
97 | sei();
|
98 |
|
99 | while(1)
|
100 | {
|
101 | if(KEY_PRESSED) // Zum Test paar Abfragen der Tasten
|
102 | {
|
103 | if(KEY_PRESSED == KEY_ARROW_DOWN)
|
104 | lcd_puts("down pressed");
|
105 | else if(KEY_PRESSED == KEY_ENTER)
|
106 | lcd_puts("enter pressed");
|
107 | else if(KEY_PRESSED == KEY_ARROW_LEFT)
|
108 | lcd_puts("left pressed");
|
109 | else if(KEY_PRESSED == KEY_ARROW_UP)
|
110 | lcd_puts("up pressed");
|
111 | else if(KEY_PRESSED == KEY_0)
|
112 | lcd_puts("0 pressed");
|
113 |
|
114 | KEY_PRESSED = 0;
|
115 | lcd_home();
|
116 | }
|
117 |
|
118 | }
|
119 | }
|
