/** * Copyright (c) 2006-2008 iWESUN (ShenZhen) Inf. * All rights reserved.  *  * Redistribution and use in source and binary forms, with or without modification,  * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, *    this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, *    this list of conditions and the following disclaimer in the documentation *    and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products *    derived from this software without specific prior written permission.  * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY  * OF SUCH DAMAGE. * * This file is part of the AvrcX MTOS *  * Author: Winter Hu  <winter.hu@gmail.com> * Create: Dec 25, 2006 */#ifndef __UART_H__#define __UART_H__#include "avrcx.h"#define UART_TXBUF_SIZE 16#define UART_RXBUF_SIZE 16#define UART_RECVDATA 1#define UART_RX_FULLY 2  // Buffer is fully#define UART_TX_EMPTY 4  // Buffer is empty#ifndef __ASSEMBLER__/* These only work in C program *//** * Uart will callback this method when uart status had changed * * @param unsigned char, The status of transfer */typedef void (*uart_hook)(unsigned char);typedef struct UartControlBlock {  __volatile__ unsigned char status;  uart_hook hook;  ByteFifo* txbuf;  ByteFifo* rxbuf;} UARTCB;/** * Initialize UART for Rx and Tx * You should invoke this method to initializ UART * Currently, this method just supported 8bit data, 1bit stop and none check * */INTERFACE void init_uart(void);/** * Register user's hook to UART driver * * @param uart_tx_hook, The hook to handle transfer event * @param uart_rx_hook, The hook to handle receive event */INTERFACE void uart_set_hook(uart_hook);/** * Put a char to UART Tx queue * * @param char, the char need put to UART * @return 0 is successful, other values are failed */INTERFACE int uart_putchar(char b);/** * Get a char from UART Rx queue * * @return the char, if equas to -1, there are some errors occur. */INTERFACE int uart_getchar(void);#endif /* ! __ASSEMBLER__ */#endif /* __UART_H__ */