Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.
timers.h
00001 /* 00002 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright notice, 00011 * this list of conditions and the following disclaimer in the documentation 00012 * and/or other materials provided with the distribution. 00013 * 3. The name of the author may not be used to endorse or promote products 00014 * derived from this software without specific prior written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00017 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00019 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00020 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00022 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00023 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00024 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00025 * OF SUCH DAMAGE. 00026 * 00027 * This file is part of the lwIP TCP/IP stack. 00028 * 00029 * Author: Adam Dunkels <adam@sics.se> 00030 * Simon Goldschmidt 00031 * 00032 */ 00033 #ifndef __LWIP_TIMERS_H__ 00034 #define __LWIP_TIMERS_H__ 00035 00036 #include "lwip/opt.h" 00037 00038 #include "lwip/err.h" 00039 #include "lwip/sys.h" 00040 00041 #ifdef __cplusplus 00042 extern "C" { 00043 #endif 00044 00045 #ifndef LWIP_DEBUG_TIMERNAMES 00046 #ifdef LWIP_DEBUG 00047 #define LWIP_DEBUG_TIMERNAMES SYS_DEBUG 00048 #else /* LWIP_DEBUG */ 00049 #define LWIP_DEBUG_TIMERNAMES 0 00050 #endif /* LWIP_DEBUG*/ 00051 #endif 00052 00053 /** Function prototype for a timeout callback function. Register such a function 00054 * using sys_timeout(). 00055 * 00056 * @param arg Additional argument to pass to the function - set up by sys_timeout() 00057 */ 00058 typedef void (* sys_timeout_handler)(void *arg); 00059 00060 struct sys_timeo { 00061 struct sys_timeo *next; 00062 u32_t time; 00063 sys_timeout_handler h; 00064 void *arg; 00065 #if LWIP_DEBUG_TIMERNAMES 00066 const char* handler_name; 00067 #endif /* LWIP_DEBUG_TIMERNAMES */ 00068 }; 00069 00070 void sys_timeouts_init(void); 00071 00072 #if LWIP_DEBUG_TIMERNAMES 00073 void sys_timeout_debug(u32_t msecs, sys_timeout_handler h, void *arg, const char* handler_name); 00074 #define sys_timeout(msecs, handler, arg) sys_timeout_debug(msecs, handler, arg, #handler) 00075 #else /* LWIP_DEBUG_TIMERNAMES */ 00076 void sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg); 00077 #endif /* LWIP_DEBUG_TIMERNAMES */ 00078 00079 void sys_untimeout(sys_timeout_handler h, void *arg); 00080 #if NO_SYS 00081 void sys_check_timeouts(void); 00082 void sys_restart_timeouts(void); 00083 #else /* NO_SYS */ 00084 void sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg); 00085 #endif /* NO_SYS */ 00086 00087 00088 #ifdef __cplusplus 00089 } 00090 #endif 00091 00092 #endif /* __LWIP_TIMERS_H__ */
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