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// 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 "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
// 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
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 = 124;
// OCR0A = CTC_MATCH_OVERFLOW;
TIMSK |= (1 << OCIE0A); // if you want interrupt
sei();
while (1)
{
// uint16_t t = 1;
// for (uint16_t i=0; i<16; i++)
// {
// print_data(t_current.s);
// uint16_t p = 0;
// for(int i=0; i<sizeof(t_current.s)*__CHAR_BIT__; i++)
// p |= t_current.s & (1<<i);
print_data(t_current.s);
// print_data(t_current.s<<10 | interval | ((PINB & PB0) == 1 ? 2 : 0));
// t = t<<1;
// }
// print_data(t_current.s);
/*
print_data(0xFFFF);
_delay_ms(1000);
print_data(0x0000);
_delay_ms(1000);
*/
}
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
*/
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