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Embedded C project:18/12/2014
Dependencies: DS1307 TextLCD mbed
Diff: NetServices/lwip/include/lwip/sio.h
- Revision:
- 0:8d87bc453349
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NetServices/lwip/include/lwip/sio.h Thu Dec 18 09:35:49 2014 +0000 @@ -0,0 +1,141 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * 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 lwIP TCP/IP stack. + */ + +/* + * This is the interface to the platform specific serial IO module + * It needs to be implemented by those platforms which need SLIP or PPP + */ + +#ifndef __SIO_H__ +#define __SIO_H__ + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* If you want to define sio_fd_t elsewhere or differently, + define this in your cc.h file. */ +#ifndef __sio_fd_t_defined +typedef void * sio_fd_t; +#endif + +/* The following functions can be defined to something else in your cc.h file + or be implemented in your custom sio.c file. */ + +#ifndef sio_open +/** + * Opens a serial device for communication. + * + * @param devnum device number + * @return handle to serial device if successful, NULL otherwise + */ +sio_fd_t sio_open(u8_t devnum); +#endif + +#ifndef sio_send +/** + * Sends a single character to the serial device. + * + * @param c character to send + * @param fd serial device handle + * + * @note This function will block until the character can be sent. + */ +void sio_send(u8_t c, sio_fd_t fd); +#endif + +#ifndef sio_recv +/** + * Receives a single character from the serial device. + * + * @param fd serial device handle + * + * @note This function will block until a character is received. + */ +u8_t sio_recv(sio_fd_t fd); +#endif + +#ifndef sio_read +/** + * Reads from the serial device. + * + * @param fd serial device handle + * @param data pointer to data buffer for receiving + * @param len maximum length (in bytes) of data to receive + * @return number of bytes actually received - may be 0 if aborted by sio_read_abort + * + * @note This function will block until data can be received. The blocking + * can be cancelled by calling sio_read_abort(). + */ +u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len); +#endif + +#ifndef sio_tryread +/** + * Tries to read from the serial device. Same as sio_read but returns + * immediately if no data is available and never blocks. + * + * @param fd serial device handle + * @param data pointer to data buffer for receiving + * @param len maximum length (in bytes) of data to receive + * @return number of bytes actually received + */ +u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len); +#endif + +#ifndef sio_write +/** + * Writes to the serial device. + * + * @param fd serial device handle + * @param data pointer to data to send + * @param len length (in bytes) of data to send + * @return number of bytes actually sent + * + * @note This function will block until all data can be sent. + */ +u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len); +#endif + +#ifndef sio_read_abort +/** + * Aborts a blocking sio_read() call. + * + * @param fd serial device handle + */ +void sio_read_abort(sio_fd_t fd); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* __SIO_H__ */