Open AldanisVigo opened 9 years ago
/* http://www.cs.mun.ca/~rod/Winter2007/4723/notes/serial/serial.html / int uart_putchar(char c, FILE stream); // <=======//// RIGHT HERE int uart_getchar(FILE *stream); // <=======//// AND HERE
// ////REQUIRED BY ======v===================v FILE uart_output = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE); FILE uart_input = FDEV_SETUP_STREAM(NULL,uart_getchar, _FDEV_SETUP_READ);
void uart_init(void) { UBRR0H = UBRRH_VALUE; UBRR0L = UBRRL_VALUE;
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); /* 8-bit data */ UCSR0B = _BV(RXEN0) | _BV(TXEN0); /* Enable RX and TX */
}
int uart_putchar(char c, FILE *stream) { if (c == '\n') { uart_putchar('\r', stream); } loop_until_bit_is_set(UCSR0A, UDRE0); UDR0 = c; return 0; }
int uart_getchar(FILE *stream) { loop_until_bit_is_set(UCSR0A, RXC0); return UDR0; }
Thank you for this, very awesome reference.
include <avr/io.h>
include
ifndef BAUD
define BAUD 9600
endif
include <util/setbaud.h>
/* http://www.cs.mun.ca/~rod/Winter2007/4723/notes/serial/serial.html / int uart_putchar(char c, FILE stream); // <=======//// RIGHT HERE int uart_getchar(FILE *stream); // <=======//// AND HERE
// ////REQUIRED BY ======v===================v FILE uart_output = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE); FILE uart_input = FDEV_SETUP_STREAM(NULL,uart_getchar, _FDEV_SETUP_READ);
void uart_init(void) { UBRR0H = UBRRH_VALUE; UBRR0L = UBRRL_VALUE;
}
int uart_putchar(char c, FILE *stream) { if (c == '\n') { uart_putchar('\r', stream); } loop_until_bit_is_set(UCSR0A, UDRE0); UDR0 = c; return 0; }
int uart_getchar(FILE *stream) { loop_until_bit_is_set(UCSR0A, RXC0); return UDR0; }