root / trunk / toolbox / uart.h @ 139
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* This file is part of Tooltron.
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*
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* Tooltron is free software: you can redistribute it and/or modify
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* it under the terms of the Lesser GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tooltron is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* Lesser GNU General Public License for more details.
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* You should have received a copy of the Lesser GNU General Public License
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* along with Tooltron. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2009 Kevin Woo <kwoo@2ndt.com>
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*
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********/
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/** @file uart.h
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*
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* @brief Initializes UART functions using the UART hardware module
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*
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* @author Kevin Woo (kwoo)
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*/
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#ifndef UART_H
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#define UART_H
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#include <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <stdint.h> |
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/** **/
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#define UART_TX_OFF 0 |
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#define UART_TX_ON 1 |
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/** @brief RX Pin for the UART **/
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#define RX _BV(PORTD0)
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#define TX _BV(PORTD1)
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#define TX_EN _BV(PORTD5)
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/** @brief The most recently received byte **/
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extern uint8_t received_byte;
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/** @brief If the value in received_byte has been read or not **/
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extern uint8_t byte_ready;
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/** @brief Initializes the UART registers and sets it to the buad rate
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* which msut be the value that is defined in the datasheet
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* for any particular speed (ie: 51 -> 9600bps)
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**/
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void init_uart(uint16_t baud);
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/** @brief Gets latest byte and returns it in output_byte. If the byte
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* was already read, returns -1 otherwise it returns 0
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**/
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int8_t uart_get_byte(uint8_t *output_byte); |
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/** @brief Sends a character array of size size. If we are currently
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* transmitting it will block until the the current transmit
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* is done.
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**/
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void uart_send_byte(uint8_t data);
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void uart_toggle_transmit(uint8_t state);
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#endif
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