Kann niemand die entsprechenden Zeilen aus dem C-Code übersetzen?
Code:
// -- Start of USART1 initialisation for Spekturm seriell-mode
// USART1 Control and Status Register A, B, C and baud rate register
uint16_t ubrr = (uint16_t) ((uint32_t) SYSCLK/(8 * 115200) - 1);
// disable RX-Interrupt
UCSR1B &= ~(1 << RXCIE1);
// disable TX-Interrupt
UCSR1B &= ~(1 << TXCIE1);
// disable DRE-Interrupt
UCSR1B &= ~(1 << UDRIE1);
// set direction of RXD1 and TXD1 pins
// set RXD1 (PD2) as an input pin
PORTD |= (1 << PORTD2);
DDRD &= ~(1 << DDD2);
// USART0 Baud Rate Register
// set clock divider
UBRR1H = (uint8_t)(ubrr>>8);
UBRR1L = (uint8_t)ubrr;
// enable double speed operation
UCSR1A |= (1 << U2X1);
// enable receiver and transmitter
//UCSR1B = (1<<RXEN1)|(1<<TXEN1);
UCSR1B = (1<<RXEN1);
// set asynchronous mode
UCSR1C &= ~(1 << UMSEL11);
UCSR1C &= ~(1 << UMSEL10);
// no parity
UCSR1C &= ~(1 << UPM11);
UCSR1C &= ~(1 << UPM10);
// 1 stop bit
UCSR1C &= ~(1 << USBS1);
// 8-bit
UCSR1B &= ~(1 << UCSZ12);
UCSR1C |= (1 << UCSZ11);
UCSR1C |= (1 << UCSZ10);
// flush receive buffer explicit
while(UCSR1A & (1<<RXC1)) UDR1;
// enable RX-interrupts at the end
UCSR1B |= (1 << RXCIE1);
// -- End of USART1 initialisation
return;
}
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