1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// vim:set et sw=2 ts=2 tw=120:
#include <stdint.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/sleep.h>
#include "inc/int/dcf77.h"
#define CTC_MATCH_OVERFLOW ((F_CPU / 1000) / 8)
// set bit
static inline void BIT_SET(volatile uint8_t* target, uint8_t bit) __attribute__((always_inline));
static inline void BIT_SET(volatile uint8_t* target, uint8_t bit) { *target |= (1 << bit); };
// set clear
static inline void BIT_CLEAR(volatile uint8_t* target, uint8_t bit) __attribute__((always_inline));
static inline void BIT_CLEAR(volatile uint8_t* target, uint8_t bit) { *target &= ~(1 << bit); };
/*
*
* PB2 : connected to ShiftClock on Port 11
* PB3 : connected to MemoryClock on Port 12 (shows content of memory)
* PB4 (PIN3) : connected to SERIAL_IN on pin 14
*
*/
void print_data(uint16_t data)
{
BIT_CLEAR(&PORTB, PB3);
for (char i = 0; i < 16; i++)
{
data & 0x1 << i
? BIT_SET(&PORTB, PB4)
: BIT_CLEAR(&PORTB, PB4);
// pulse sck...
BIT_SET(&PORTB, PB2);
BIT_CLEAR(&PORTB, PB2);
}
BIT_SET(&PORTB, PB3);
}
int main(void)
{
BIT_CLEAR(&PORTB, PB5);
_delay_ms(20);
BIT_SET(&PORTB, PB5);
BIT_CLEAR(&PORTB, PB5);
_delay_ms(20);
BIT_SET(&PORTB, PB5);
// make all pins output pins...
// DDRB = 0xFF;
DDRB = 0b11111110;
PORTB |= 1<<PB0; // activate pullup
PORTB |= 1<<PB1; // activate receiver
PORTB &= ~(1<<PB1);
// DDRB &= ~(1 << PB0); // makes PB0 an input pin (INT0)
// PORTB |= (1 << PB0); // activate input resistor
// activate dcf77-receiver...
// PORTB &= (1 << PB1); // sets PB1 to low
// _delay_ms(20);
// PORTB &= ~(1 << PB1); // sets PB1 to low
cli();
GIMSK |= (1<<INT0); // External Interrupt Request 0 Enable
GIMSK |= (1<<PCIE); // Pin Change Interrupt Enable
// MCU Control Register (controls CPU-behaviours like interrupts & sleepmode)
// MCUCR |= ~(1<<ISC01) | (1<<ISC00); // any logical change generates interrupt
// set sleep mode to power-down...
// MCUCR &= ~(1<<SM0);
// MCUCR |= (1<<SM1);
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
PCMSK |= (1<<PCINT0);
// INT0_CONTROL = INT0_RISING_EDGE; // going to toggle int0-behaviour
TCCR0A |= (1 << WGM01); // CTC mode
// TCCR0B |= (1 << CS00);
TCCR0B |= (1 << CS01); // Prescaler 8
// TCCR0B |= (1 << CS02); // Prescaler 256
// OCR0A |= (1 << WGM01); // CTC mode
// OCR0A = 149;
OCR0A = 125;
// OCR0A = CTC_MATCH_OVERFLOW;
TIMSK |= (1 << OCIE0A); // if you want interrupt
sleep_enable();
sleep_bod_disable();
sei();
for(uint8_t i=0; i<16; i++)
{
print_data(3<<i);
_delay_ms(5);
}
t_current.m = 0xffff;
t_current.h = 0xffff;
while (1)
{
//print_data(lastinterval<<1 | (PINB & PB0));
/*
if(t_current.s & 0x1) // uneven number?
{
print_data((uint16_t) 31<<6);
_delay_us(50);
}
*/
print_data(
(uint16_t) 0
| ((uint16_t) (PINB & 0x0001) ? 0x3<<7 : 0<<7)
| ((t_current.h & 0x1F)<<10)
| ((t_current.m & 0x3F)<<0)
);
sleep_cpu();
// print_data(interval | ((PINB & PB0) == 1 ? 2 : 0));
//print_data(PINB);
}
return 0;
}
/*
for(uint16_t hour=0; hour<24; hour++)
for(uint16_t minute=0; minute<60; minute++)
for (uint16_t second = 1; second < 60; second++)
{
// clear register (reset)
// print_data(hour<< 12 | minute << 6 | second);
// print_data((int64_t) dcf77);
// dcf77[dcf77_bit].bit == 1
// ? print_data(0xFFFF)
// : print_data(0x0000);
}A
*/
|
