+++ /dev/null
-/* vim:ts=4 sts=4 et tw=80
- *
- * fnordlicht firmware
- *
- * for additional information please
- * see http://lochraster.org/fnordlichtmini
- *
- * (c) by Alexander Neumann <alexander@bumpern.de>
- * Lars Noschinski <lars@public.noschinski.de>
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 3 as published by
- * the Free Software Foundation.
- *
- * 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 "globals.h"
-
-#if CONFIG_SERIAL
-
-#include "../common/io.h"
-#include <avr/interrupt.h>
-
-#include "globals.h"
-#include "../common/common.h"
-#include "fifo.h"
-#include "uart.h"
-
-/* define uart mode (8N1) */
-#if defined(__AVR_ATmega8__)
-/* in atmega8, we need a special switching bit
- * for addressing UCSRC */
-#define UART_UCSRC _BV(URSEL) | _BV(UCSZ0) | _BV(UCSZ1)
-
-#elif defined(__AVR_ATmega88__) || defined(__AVR_ATmega168__)
-/* in atmega88, this isn't needed any more */
-#define UART_UCSRC _BV(_UCSZ0_UART0) | _BV(_UCSZ1_UART0)
-#endif
-
-/* global variables */
-volatile struct global_uart_t global_uart;
-
-/** output one character */
-void uart_putc(uint8_t data)
-{
- /* store data */
- fifo_enqueue((fifo_t *)&global_uart.tx, data);
-
- /* enable interrupt */
- _UCSRB_UART0 |= _BV(_UDRIE_UART0);
-}
-
-/** init the hardware uart */
-void uart_init(void)
-{
- #define BAUD CONFIG_SERIAL_BAUDRATE
- #include <util/setbaud.h>
-
- /* set baud rate */
- _UBRRH_UART0 = UBRRH_VALUE;
- _UBRRL_UART0 = UBRRL_VALUE;
-
- #if USE_2X
- _UCSRA_UART0 |= (1 << _U2X_UART0);
- #endif
-
- /* set mode */
- _UCSRC_UART0 = UART_UCSRC;
-
- /* enable transmitter, receiver and receiver complete interrupt */
- _UCSRB_UART0 = _BV(_TXEN_UART0) | _BV(_RXEN_UART0) | _BV(_RXCIE_UART0);
-
- /* init fifos */
- fifo_init((fifo_t *)&global_uart.rx);
- fifo_init((fifo_t *)&global_uart.tx);
-}
-
-
-/** interrupts*/
-
-/** uart receive interrupt */
-ISR(_SIG_UART_RECV_UART0)
-{
-
- /* store received data */
- fifo_enqueue((fifo_t *)&global_uart.rx, _UDR_UART0);
-
-}
-
-/** uart data register empty interrupt */
-ISR(_SIG_UART_DATA_UART0)
-{
-
- /* load next byte to transfer */
- _UDR_UART0 = fifo_dequeue((fifo_t *)&global_uart.tx);
-
- /* check if this interrupt is still needed */
- if ( fifo_fill((fifo_t *)&global_uart.tx) == 0) {
- /* disable this interrupt */
- _UCSRB_UART0 &= ~_BV(_UDRIE_UART0);
- }
-
-}
-
-
-#endif