Ethernet for Nucleo and Disco board STM32F746 works with gcc and arm. IAC is untested
Dependents: STM32F746_iothub_client_sample_mqtt DISCO-F746NG_Ethernet Nucleo_F746ZG_Ethernet thethingsiO-DISCO_F746NG-mqtt ... more
sys.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 * 00031 */ 00032 #ifndef __LWIP_SYS_H__ 00033 #define __LWIP_SYS_H__ 00034 00035 #include "lwip/opt.h" 00036 00037 #ifdef __cplusplus 00038 extern "C" { 00039 #endif 00040 00041 #if NO_SYS 00042 00043 /* For a totally minimal and standalone system, we provide null 00044 definitions of the sys_ functions. */ 00045 typedef u8_t sys_sem_t; 00046 typedef u8_t sys_mutex_t; 00047 typedef u8_t sys_mbox_t; 00048 00049 #define sys_sem_new(s, c) ERR_OK 00050 #define sys_sem_signal(s) 00051 #define sys_sem_wait(s) 00052 #define sys_arch_sem_wait(s,t) 00053 #define sys_sem_free(s) 00054 #define sys_sem_valid(s) 0 00055 #define sys_sem_set_invalid(s) 00056 #define sys_mutex_new(mu) ERR_OK 00057 #define sys_mutex_lock(mu) 00058 #define sys_mutex_unlock(mu) 00059 #define sys_mutex_free(mu) 00060 #define sys_mutex_valid(mu) 0 00061 #define sys_mutex_set_invalid(mu) 00062 #define sys_mbox_new(m, s) ERR_OK 00063 #define sys_mbox_fetch(m,d) 00064 #define sys_mbox_tryfetch(m,d) 00065 #define sys_mbox_post(m,d) 00066 #define sys_mbox_trypost(m,d) 00067 #define sys_mbox_free(m) 00068 #define sys_mbox_valid(m) 00069 #define sys_mbox_set_invalid(m) 00070 00071 #define sys_thread_new(n,t,a,s,p) 00072 00073 #define sys_msleep(t) 00074 00075 #else /* NO_SYS */ 00076 00077 /** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */ 00078 #define SYS_ARCH_TIMEOUT 0xffffffffUL 00079 00080 /** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate. 00081 * For now we use the same magic value, but we allow this to change in future. 00082 */ 00083 #define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT 00084 00085 #include "lwip/err.h" 00086 #include "arch/sys_arch.h" 00087 00088 /** Function prototype for thread functions */ 00089 typedef void (*lwip_thread_fn)(void *arg); 00090 00091 /* Function prototypes for functions to be implemented by platform ports 00092 (in sys_arch.c) */ 00093 00094 /* Mutex functions: */ 00095 00096 /** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores 00097 should be used instead */ 00098 #if LWIP_COMPAT_MUTEX 00099 /* for old ports that don't have mutexes: define them to binary semaphores */ 00100 #define sys_mutex_t sys_sem_t 00101 #define sys_mutex_new(mutex) sys_sem_new(mutex, 1) 00102 #define sys_mutex_lock(mutex) sys_sem_wait(mutex) 00103 #define sys_mutex_unlock(mutex) sys_sem_signal(mutex) 00104 #define sys_mutex_free(mutex) sys_sem_free(mutex) 00105 #define sys_mutex_valid(mutex) sys_sem_valid(mutex) 00106 #define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex) 00107 00108 #else /* LWIP_COMPAT_MUTEX */ 00109 00110 /** Create a new mutex 00111 * @param mutex pointer to the mutex to create 00112 * @return a new mutex */ 00113 err_t sys_mutex_new(sys_mutex_t *mutex); 00114 /** Lock a mutex 00115 * @param mutex the mutex to lock */ 00116 void sys_mutex_lock(sys_mutex_t *mutex); 00117 /** Unlock a mutex 00118 * @param mutex the mutex to unlock */ 00119 void sys_mutex_unlock(sys_mutex_t *mutex); 00120 /** Delete a semaphore 00121 * @param mutex the mutex to delete */ 00122 void sys_mutex_free(sys_mutex_t *mutex); 00123 #ifndef sys_mutex_valid 00124 /** Check if a mutex is valid/allocated: return 1 for valid, 0 for invalid */ 00125 int sys_mutex_valid(sys_mutex_t *mutex); 00126 #endif 00127 #ifndef sys_mutex_set_invalid 00128 /** Set a mutex invalid so that sys_mutex_valid returns 0 */ 00129 void sys_mutex_set_invalid(sys_mutex_t *mutex); 00130 #endif 00131 #endif /* LWIP_COMPAT_MUTEX */ 00132 00133 /* Semaphore functions: */ 00134 00135 /** Create a new semaphore 00136 * @param sem pointer to the semaphore to create 00137 * @param count initial count of the semaphore 00138 * @return ERR_OK if successful, another err_t otherwise */ 00139 err_t sys_sem_new(sys_sem_t *sem, u8_t count); 00140 /** Signals a semaphore 00141 * @param sem the semaphore to signal */ 00142 void sys_sem_signal(sys_sem_t *sem); 00143 /** Wait for a semaphore for the specified timeout 00144 * @param sem the semaphore to wait for 00145 * @param timeout timeout in milliseconds to wait (0 = wait forever) 00146 * @return time (in milliseconds) waited for the semaphore 00147 * or SYS_ARCH_TIMEOUT on timeout */ 00148 u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout); 00149 /** Delete a semaphore 00150 * @param sem semaphore to delete */ 00151 void sys_sem_free(sys_sem_t *sem); 00152 /** Wait for a semaphore - forever/no timeout */ 00153 #define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0) 00154 #ifndef sys_sem_valid 00155 /** Check if a sempahore is valid/allocated: return 1 for valid, 0 for invalid */ 00156 int sys_sem_valid(sys_sem_t *sem); 00157 #endif 00158 #ifndef sys_sem_set_invalid 00159 /** Set a semaphore invalid so that sys_sem_valid returns 0 */ 00160 void sys_sem_set_invalid(sys_sem_t *sem); 00161 #endif 00162 00163 /* Time functions. */ 00164 #ifndef sys_msleep 00165 void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */ 00166 #endif 00167 00168 /* Mailbox functions. */ 00169 00170 /** Create a new mbox of specified size 00171 * @param mbox pointer to the mbox to create 00172 * @param size (miminum) number of messages in this mbox 00173 * @return ERR_OK if successful, another err_t otherwise */ 00174 err_t sys_mbox_new(sys_mbox_t *mbox, int size); 00175 /** Post a message to an mbox - may not fail 00176 * -> blocks if full, only used from tasks not from ISR 00177 * @param mbox mbox to posts the message 00178 * @param msg message to post (ATTENTION: can be NULL) */ 00179 void sys_mbox_post(sys_mbox_t *mbox, void *msg); 00180 /** Try to post a message to an mbox - may fail if full or ISR 00181 * @param mbox mbox to posts the message 00182 * @param msg message to post (ATTENTION: can be NULL) */ 00183 err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg); 00184 /** Wait for a new message to arrive in the mbox 00185 * @param mbox mbox to get a message from 00186 * @param msg pointer where the message is stored 00187 * @param timeout maximum time (in milliseconds) to wait for a message 00188 * @return time (in milliseconds) waited for a message, may be 0 if not waited 00189 or SYS_ARCH_TIMEOUT on timeout 00190 * The returned time has to be accurate to prevent timer jitter! */ 00191 u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout); 00192 /* Allow port to override with a macro, e.g. special timout for sys_arch_mbox_fetch() */ 00193 #ifndef sys_arch_mbox_tryfetch 00194 /** Wait for a new message to arrive in the mbox 00195 * @param mbox mbox to get a message from 00196 * @param msg pointer where the message is stored 00197 * @param timeout maximum time (in milliseconds) to wait for a message 00198 * @return 0 (milliseconds) if a message has been received 00199 * or SYS_MBOX_EMPTY if the mailbox is empty */ 00200 u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg); 00201 #endif 00202 /** For now, we map straight to sys_arch implementation. */ 00203 #define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg) 00204 /** Delete an mbox 00205 * @param mbox mbox to delete */ 00206 void sys_mbox_free(sys_mbox_t *mbox); 00207 #define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0) 00208 #ifndef sys_mbox_valid 00209 /** Check if an mbox is valid/allocated: return 1 for valid, 0 for invalid */ 00210 int sys_mbox_valid(sys_mbox_t *mbox); 00211 #endif 00212 #ifndef sys_mbox_set_invalid 00213 /** Set an mbox invalid so that sys_mbox_valid returns 0 */ 00214 void sys_mbox_set_invalid(sys_mbox_t *mbox); 00215 #endif 00216 00217 /** The only thread function: 00218 * Creates a new thread 00219 * @param name human-readable name for the thread (used for debugging purposes) 00220 * @param thread thread-function 00221 * @param arg parameter passed to 'thread' 00222 * @param stacksize stack size in bytes for the new thread (may be ignored by ports) 00223 * @param prio priority of the new thread (may be ignored by ports) */ 00224 sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stacksize, int prio); 00225 00226 #endif /* NO_SYS */ 00227 00228 /* sys_init() must be called before anthing else. */ 00229 void sys_init(void); 00230 00231 #ifndef sys_jiffies 00232 /** Ticks/jiffies since power up. */ 00233 u32_t sys_jiffies(void); 00234 #endif 00235 00236 /** Returns the current time in milliseconds, 00237 * may be the same as sys_jiffies or at least based on it. */ 00238 u32_t sys_now(void); 00239 00240 /* Critical Region Protection */ 00241 /* These functions must be implemented in the sys_arch.c file. 00242 In some implementations they can provide a more light-weight protection 00243 mechanism than using semaphores. Otherwise semaphores can be used for 00244 implementation */ 00245 #ifndef SYS_ARCH_PROTECT 00246 /** SYS_LIGHTWEIGHT_PROT 00247 * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection 00248 * for certain critical regions during buffer allocation, deallocation and memory 00249 * allocation and deallocation. 00250 */ 00251 #if SYS_LIGHTWEIGHT_PROT 00252 00253 /** SYS_ARCH_DECL_PROTECT 00254 * declare a protection variable. This macro will default to defining a variable of 00255 * type sys_prot_t. If a particular port needs a different implementation, then 00256 * this macro may be defined in sys_arch.h. 00257 */ 00258 #define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev 00259 /** SYS_ARCH_PROTECT 00260 * Perform a "fast" protect. This could be implemented by 00261 * disabling interrupts for an embedded system or by using a semaphore or 00262 * mutex. The implementation should allow calling SYS_ARCH_PROTECT when 00263 * already protected. The old protection level is returned in the variable 00264 * "lev". This macro will default to calling the sys_arch_protect() function 00265 * which should be implemented in sys_arch.c. If a particular port needs a 00266 * different implementation, then this macro may be defined in sys_arch.h 00267 */ 00268 #define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect() 00269 /** SYS_ARCH_UNPROTECT 00270 * Perform a "fast" set of the protection level to "lev". This could be 00271 * implemented by setting the interrupt level to "lev" within the MACRO or by 00272 * using a semaphore or mutex. This macro will default to calling the 00273 * sys_arch_unprotect() function which should be implemented in 00274 * sys_arch.c. If a particular port needs a different implementation, then 00275 * this macro may be defined in sys_arch.h 00276 */ 00277 #define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev) 00278 sys_prot_t sys_arch_protect(void); 00279 void sys_arch_unprotect(sys_prot_t pval); 00280 00281 #else 00282 00283 #define SYS_ARCH_DECL_PROTECT(lev) 00284 #define SYS_ARCH_PROTECT(lev) 00285 #define SYS_ARCH_UNPROTECT(lev) 00286 00287 #endif /* SYS_LIGHTWEIGHT_PROT */ 00288 00289 #endif /* SYS_ARCH_PROTECT */ 00290 00291 /* 00292 * Macros to set/get and increase/decrease variables in a thread-safe way. 00293 * Use these for accessing variable that are used from more than one thread. 00294 */ 00295 00296 #ifndef SYS_ARCH_INC 00297 #define SYS_ARCH_INC(var, val) do { \ 00298 SYS_ARCH_DECL_PROTECT(old_level); \ 00299 SYS_ARCH_PROTECT(old_level); \ 00300 var += val; \ 00301 SYS_ARCH_UNPROTECT(old_level); \ 00302 } while(0) 00303 #endif /* SYS_ARCH_INC */ 00304 00305 #ifndef SYS_ARCH_DEC 00306 #define SYS_ARCH_DEC(var, val) do { \ 00307 SYS_ARCH_DECL_PROTECT(old_level); \ 00308 SYS_ARCH_PROTECT(old_level); \ 00309 var -= val; \ 00310 SYS_ARCH_UNPROTECT(old_level); \ 00311 } while(0) 00312 #endif /* SYS_ARCH_DEC */ 00313 00314 #ifndef SYS_ARCH_GET 00315 #define SYS_ARCH_GET(var, ret) do { \ 00316 SYS_ARCH_DECL_PROTECT(old_level); \ 00317 SYS_ARCH_PROTECT(old_level); \ 00318 ret = var; \ 00319 SYS_ARCH_UNPROTECT(old_level); \ 00320 } while(0) 00321 #endif /* SYS_ARCH_GET */ 00322 00323 #ifndef SYS_ARCH_SET 00324 #define SYS_ARCH_SET(var, val) do { \ 00325 SYS_ARCH_DECL_PROTECT(old_level); \ 00326 SYS_ARCH_PROTECT(old_level); \ 00327 var = val; \ 00328 SYS_ARCH_UNPROTECT(old_level); \ 00329 } while(0) 00330 #endif /* SYS_ARCH_SET */ 00331 00332 00333 #ifdef __cplusplus 00334 } 00335 #endif 00336 00337 #endif /* __LWIP_SYS_H__ */
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