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/*
* Copyright 2014 Ettus Research LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <octoclock.h>
#include <usart.h>
#include <util/delay.h>
#include <avr/io.h>
void usart_init(void){
UCSR1B = (1 << TXEN) | (1 << RXEN) | (1 << RXCIE); //Turn on TX/RX circuitry, enable RX interrupts
UCSR1C = (3 << UCSZ0); //Use 8-bit character sizes, 1 stop bit, no parity
UBRR1H = (uint8_t)(BAUD_PRESCALE >> 8);
UBRR1L = (uint8_t)BAUD_PRESCALE;
}
char usart_getc(void){
while((UCSR1A & (1 << RXC)) == 0);
return UDR1;
}
char usart_getc_noblock(void){
return ((UCSR1A & (1 << RXC))) ? UDR1 : -1;
}
void usart_putc(char ch){
while((UCSR1A & (1 << UDRE1)) == 0);
UDR1 = ch;
}
void usart_putc_nowait(char ch){
if((UCSR1A & (1 << UDRE1)) != 0) UDR1 = ch;
}
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