38 lines
592 B
C
38 lines
592 B
C
#include <stdio.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <tabby/avr/uart.h>
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#define BAUD TABBY_AVR_UART_BAUD
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#include <util/setbaud.h>
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void uart_init() {
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UBRR0H = UBRRH_VALUE;
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UBRR0L = UBRRL_VALUE;
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#if USE_2X
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UCSR0A |= _BV(U2X0);
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#else
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UCSR0A &= ~(_BV(U2X0));
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#endif
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UCSR0B = _BV(RXEN0) | _BV(TXEN0);
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UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
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}
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int uart_putchar(char c, FILE *fh) {
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loop_until_bit_is_set(UCSR0A, UDRE0);
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UDR0 = c;
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return 0;
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}
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int uart_getchar(FILE *fh) {
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loop_until_bit_is_set(UCSR0A, RXC0);
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return UDR0;
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}
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