| 1,5 → 1,5 |
|---|
| //---------------------------------------------------------------------------------- |
| // Prevodnik RS232 <--> RS485 s prodlevou pri prevodu smerem do RS485 |
| // Prevodnik RS232 <--> RS485 |
| // pri startbitu na RS232 zapne okamzite vysilac pokud nejsou detekovana data z RS485. |
| //---------------------------------------------------------------------------------- |
| |
| 10,20 → 10,10 |
|---|
| #include <avr/eeprom.h> |
| #include <avr/pgmspace.h> |
| |
| #define POVOLOVAK_LOW PORTB &= ~(1<<PB3) |
| #define POVOLOVAK_HIGH PORTB |= (1<<PB3) |
| #define DATA (PIND & (1<<PD1)) |
| |
| #define F_CPU 3686400UL |
| #include <util/delay.h> |
| |
| void delay_ms(unsigned int ms) |
| { |
| while(ms) |
| { |
| _delay_ms(0.96); |
| ms--; |
| } |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // Main |
| // ------------------------------------------------------------------ |
| 34,24 → 24,23 |
|---|
| int last; |
| |
| DDRD |= (1<<DDD5); |
| // DDRB |= (1<<DDB3); |
| DDRB |= (1<<DDB3); |
| |
| TCCR1B |= (1 << CS10); // Set up timer |
| |
| // PORTB |= (1<<PB3); |
| |
| while(1) |
| { |
| if(!(PIND & (1<<PD1))) // kdyz je 0 na datech |
| if(!DATA) // kdyz je 0 na datech |
| { |
| PORTD &= ~(1<<PD5); // zapni vysilani |
| for (spozdeni=0;spozdeni<=8;spozdeni ++) |
| POVOLOVAK_HIGH; // zapni vysilani |
| |
| for (spozdeni=8;spozdeni>=0;spozdeni --) // odpocitej dobu 8mi bitu |
| { |
| last = (PIND & (1<<PD1)); |
| last = DATA; |
| TCNT1 = 0; // zacni znova merit cas |
| while (TCNT1 <= delay) |
| while (TCNT1 <= delay) // bit poznas tak, ze je to nejmensi nalezena delka trvaleho stavu |
| { |
| if((PIND & (1<<PD1)) != last) |
| if(DATA != last) |
| { |
| if (TCNT1 < delay) delay = TCNT1; |
| break; |
| 58,9 → 47,16 |
|---|
| } |
| } |
| } |
| while (!(PIND & (1<<PD1))); |
| while (!DATA); // cekani na stop bit |
| |
| for (spozdeni=2;spozdeni >= 0;spozdeni --) |
| { |
| TCNT1 = 0; // zacni znova merit cas zacatku stopbitu |
| while (TCNT1 <= delay) if(!DATA) break; |
| } |
| } |
| else PORTD |= (1<<PD5); // kdyz je 1 prepni na prijem |
| else POVOLOVAK_LOW; // kdyz je 1 prepni na prijem |
| delay = 60000; |
| } |
| return(0); |
| } |