43 lines
749 B
C++
43 lines
749 B
C++
#include "usart.h"
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void USART::init()
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{
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UCSR0B = _BV(RXEN0) | _BV(TXEN0);
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// Einstellen des Datenformats: 8 Datenbits, 1 Stoppbit
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UCSR0C = _BV(UCSZ00) |_BV(UCSZ01);// (1<<URSEL0)|(1<<UCSZ10)|(1<<UCSZ00);
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// setze Baudrate
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UBRR0H = (((F_CPU / (16UL * BAUDRATE))-1) >> 8) & 0xFF;
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UBRR0L = ((F_CPU / (16UL * BAUDRATE))-1) & 0xFF;
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}
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void USART::writeByte(uint8_t b)
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{
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UDR0 = b;
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while(!(UCSR0A & _BV(TXC0)));
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}
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void USART::writeInt(uint16_t v)
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{
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UDR0 = v & 0xFF;
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v >>= 8;
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UDR0 = v & 0xFF;
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while(!(UCSR0A & _BV(TXC0)));
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}
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uint8_t USART::readByte()
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{
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while (!(UCSR0A & (1<<RXC0)));
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return UDR0;
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}
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uint16_t USART::readInt()
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{
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uint16_t v = readByte();
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v |= readByte() << 8;
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return v;
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}
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