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// vim:set et sw=2 ts=2 tw=120:
#define __AVR_ATtiny85__
#include <avr/interrupt.h>
#include <avr/io.h> // (1)
#ifndef F_CPU
#warning "F_CPU war noch nicht definiert, wird nun mit 3686400 definiert"
#define F_CPU 1000000UL
#endif
#include <stdint.h>
#include <util/delay.h>
// 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); };
void pulse_sck()
{
PORTB |= (1 << PB2);
_delay_ms(10); // Eine Sekunde +/-1/10000 Sekunde warten...
PORTB ^= (1 << PB2);
}
void print_data(uint16_t data)
{
BIT_CLEAR(&PORTB, PB4);
_delay_ms(50);
BIT_SET(&PORTB, PB4);
for (uint16_t i = 0; i < 16; i++)
{
data & 0x1 << i ? BIT_SET(&PORTB, PB4) : BIT_CLEAR(&PORTB, PB4);
pulse_sck();
}
BIT_CLEAR(&PORTB, PB3);
_delay_ms(50);
BIT_SET(&PORTB, PB3);
}
int main(void)
{
DDRB = 0xFF;
BIT_CLEAR(&PORTB, PB5);
_delay_ms(200);
BIT_SET(&PORTB, PB5);
BIT_CLEAR(&PORTB, PB5);
_delay_ms(200);
BIT_SET(&PORTB, PB5);
while (1)
{ // Endlosschleife
uint16_t data = 1;
for (; data < UINT16_MAX; data++)
{
// clear register (reset)
print_data(data | data << 6);
}
_delay_ms(1000); // Eine Sekunde +/-1/10000 Sekunde warten...
}
return 0;
}
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