void init(void){
_usart_init();
_timer_init();
DDRB |= (1<<PB0)|(1<<PB1)|(1<<PB2)|(1<<PB3)|(1<<PB4)|(1<<PB5)|(1<<PB6)|(1<<PB7); // Ausgänge für die Relais
sei();
}
struct usart_dev* usart_init(uint8_t usart,
uint32_t baudrate,
uint8_t bits,
uint8_t sbits,
uint8_t parity,
uint8_t flags)
{
uint8_t ucsra = 0x20;
uint8_t ucsrb = 0x00;
uint8_t ucsrc = 0x06;
uint16_t ubrr = 0x0000;
struct usart_dev * dev;
if (usart == USART_0) {
dev = &usart_0;
_usart_init(dev, &UCSR0A, &UCSR0B, &UCSR0C, &UBRR0L, &UBRR0H, &UDR0, flags);
} else {
dev = &usart_1;
_usart_init(dev, &UCSR1A, &UCSR1B, &UCSR1C, &UBRR1L, &UBRR1H, &UDR1, flags);
}
/*Set baud rate */
//ubrr = USART_UBRR_VAL(baudrate) - 3;
ubrr = USART_UBRR_VAL(baudrate);
/*Enable receiver and transmitter */
if (!(flags & USART_NO_RX))
ucsrb |= (1 << RXEN);
if (!(flags & USART_NO_TX))
ucsrb |= (1 << TXEN);
/* character bits */
if (bits == USART_BITS_9)
ucsrb |= (1 << UCSZ2);
ucsrc &= (bits << 1) | 0xF9;
/* transmission mode */
if (flags & USART_SYNC)
ucsrc |= (1 << UMSEL);
/* parity */
ucsrc |= (parity << UPM0);
/* stop bits */
ucsrc |= (sbits << USBS);
#if defined(USART_USE_CTS)
/* cts, rts */
if (flags & USART_CTS) {
if (usart == USART_0) {
DDRE &= ~(1 << DDE3); /* input */
PORTE &= ~(1 << PE3); /* no int pull-up */
dev->cts = &PINE;
dev->cts_pin = PINE3;
} else {
DDRD &= ~(1 << DDD4); /* input */
PORTD &= ~(1 << PD4); /* no int pull-up */
usart_1.cts = &PORTD;
usart_1.cts_pin = PIND4;
}
}
#endif
#if defined(USART_USE_RTS)
if (flags & USART_RTS) {
if (usart == USART_0) {
DDRE |= (1 << DDE2); /* output */
PORTE &= ~(1 << PE2); /* low */
dev->rts = &PORTE;
dev->rts_pin = PORTE2;
} else {
/** ?? **/
}
}
/* interrupts */
#endif
#if defined(USART_USE_ISR)
ucsrb |= (1 << RXCIE0);
#endif
cli();
*(dev->ucsrc) = ucsrc;
*(dev->ucsrb) = ucsrb;
*(dev->ucsra) = ucsra;
*(dev->ubrrh) = (uint8_t)(ubrr >> 8);
sei();
*(dev->ubrrl) = (uint8_t)ubrr;
return dev;
}
