Steve Karg
fdd49f1791
* Added pretty-apps and pretty-ports make targets * pretty-fied apps folder C files * Pretty-fied ports folder C and H files Co-authored-by: Steve Karg <skarg@users.sourceforge.net>
44 lines
913 B
C
44 lines
913 B
C
/**
|
|
* @file
|
|
* @author Miguel Fernandes <miguelandre.fernandes@gmail.com>
|
|
* @date 6 de Jun de 2013
|
|
* @brief For redirecting stdout, stdin and stderr
|
|
* see http://www.appelsiini.net/2011/simple-usart-with-avr-libc
|
|
*/
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <avr/io.h>
|
|
#include <util/setbaud.h>
|
|
#include "hardware.h"
|
|
#include "uart.h"
|
|
|
|
void uart_init(void)
|
|
{
|
|
UBRR0H = UBRRH_VALUE;
|
|
UBRR0L = UBRRL_VALUE;
|
|
|
|
#if USE_2X
|
|
UCSR0A |= _BV(U2X0);
|
|
#else
|
|
UCSR0A &= ~(_BV(U2X0));
|
|
#endif
|
|
|
|
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); /* 8-bit data */
|
|
UCSR0B = _BV(RXEN0) | _BV(TXEN0); /* Enable RX and TX */
|
|
}
|
|
|
|
void uart_putchar(char c, FILE *stream)
|
|
{
|
|
if (c == '\n') {
|
|
uart_putchar('\r', stream);
|
|
}
|
|
loop_until_bit_is_set(UCSR0A, UDRE0);
|
|
UDR0 = c;
|
|
}
|
|
|
|
char uart_getchar(FILE *stream)
|
|
{
|
|
loop_until_bit_is_set(UCSR0A, RXC0); /* Wait until data exists. */
|
|
return UDR0;
|
|
}
|