基于DWC_ether_qos的以太网驱动开发-RTOS环境移植LWIP与性能测试

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基于DWC_ether_qos的以太网驱动开发-RTOS环境移植LWIP与性能测试 (qq.com)

https://mp.weixin.qq.com/s/E80GdN3RzrG3NeXfdwi4_Q

一.前言

前面我们基于无OS环境移植了LWIP,这一篇我们来基于RTOS移植LWIP,与无OS环境基本一致,只是需要实现一些系统组件的接口,信号量互斥量等。

二.需要移植文件

我们参考lwipcontribportsfreertos下的移植进行修改,如果使用的是freertos的话直接参考即可。如果用的其他RTOS可以复制一份修改。

复制lwipcontribportsfreertos并添加cc.h和lwipopts.h(这两个文件可以从contrib下其他样例代码中复制)

Cc.h

还是和无OS一样实现随机数函数

#ifndef LWIP_ARCH_CC_H
#define LWIP_ARCH_CC_H

#include < stdint.h >

#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion "%s" failed at line %d in %sn", 
                                     x, __LINE__, __FILE__);} while(0)

extern uint32_t lwip_port_rand(void);
#define LWIP_RAND() (lwip_port_rand())

#endif

Sys_arch.h/sys_arch.c

如果使用的freertos直接使用即可，否则按需修改。

相关接口。

/*
 * Copyright (c) 2017 Simon Goldschmidt
 * 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.
 *
 * Author: Simon Goldschmdit < [e-mail] >
 *
 */
#ifndef LWIP_ARCH_SYS_ARCH_H
#define LWIP_ARCH_SYS_ARCH_H

#include "lwip/opt.h"
#include "lwip/arch.h"

/** This is returned by _fromisr() sys functions to tell the outermost function
 * that a higher priority task was woken and the scheduler needs to be invoked.
 */
#define ERR_NEED_SCHED 123

/* This port includes FreeRTOS headers in sys_arch.c only.
 *  FreeRTOS uses pointers as object types. We use wrapper structs instead of
 * void pointers directly to get a tiny bit of type safety.
 */

void sys_arch_msleep(u32_t delay_ms);
#define sys_msleep(ms) sys_arch_msleep(ms)

#if SYS_LIGHTWEIGHT_PROT
typedef u32_t sys_prot_t;
#endif /* SYS_LIGHTWEIGHT_PROT */

#if !LWIP_COMPAT_MUTEX
struct _sys_mut {
  void *mut;
};
typedef struct _sys_mut sys_mutex_t;
#define sys_mutex_valid_val(mutex)   ((mutex).mut != NULL)
#define sys_mutex_valid(mutex)       (((mutex) != NULL) && sys_mutex_valid_val(*(mutex)))
#define sys_mutex_set_invalid(mutex) ((mutex)->mut = NULL)
#endif /* !LWIP_COMPAT_MUTEX */

struct _sys_sem {
  void *sem;
};
typedef struct _sys_sem sys_sem_t;
#define sys_sem_valid_val(sema)   ((sema).sem != NULL)
#define sys_sem_valid(sema)       (((sema) != NULL) && sys_sem_valid_val(*(sema)))
#define sys_sem_set_invalid(sema) ((sema)->sem = NULL)

struct _sys_mbox {
  void *mbx;
};
typedef struct _sys_mbox sys_mbox_t;
#define sys_mbox_valid_val(mbox)   ((mbox).mbx != NULL)
#define sys_mbox_valid(mbox)       (((mbox) != NULL) && sys_mbox_valid_val(*(mbox)))
#define sys_mbox_set_invalid(mbox) ((mbox)->mbx = NULL)

struct _sys_thread {
  void *thread_handle;
};
typedef struct _sys_thread sys_thread_t;

#if LWIP_NETCONN_SEM_PER_THREAD
sys_sem_t* sys_arch_netconn_sem_get(void);
void sys_arch_netconn_sem_alloc(void);
void sys_arch_netconn_sem_free(void);
#define LWIP_NETCONN_THREAD_SEM_GET()   sys_arch_netconn_sem_get()
#define LWIP_NETCONN_THREAD_SEM_ALLOC() sys_arch_netconn_sem_alloc()
#define LWIP_NETCONN_THREAD_SEM_FREE()  sys_arch_netconn_sem_free()
#endif /* LWIP_NETCONN_SEM_PER_THREAD */

#endif /* LWIP_ARCH_SYS_ARCH_H */

/*
 * Copyright (c) 2017 Simon Goldschmidt
 * 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.
 *
 * Author: Simon Goldschmidt < [e-mail] >
 *
 */

/* lwIP includes. */
#include "lwip/debug.h"
#include "lwip/def.h"
#include "lwip/sys.h"
#include "lwip/mem.h"
#include "lwip/stats.h"
#include "lwip/tcpip.h"
#include "FreeRTOS.h"
#include "semphr.h"
#include "task.h"

/** Set this to 1 if you want the stack size passed to sys_thread_new() to be
 * interpreted as number of stack words (FreeRTOS-like).
 * Default is that they are interpreted as byte count (lwIP-like).
 */
#ifndef LWIP_FREERTOS_THREAD_STACKSIZE_IS_STACKWORDS
#define LWIP_FREERTOS_THREAD_STACKSIZE_IS_STACKWORDS  0
#endif

/** Set this to 1 to use a mutex for SYS_ARCH_PROTECT() critical regions.
 * Default is 0 and locks interrupts/scheduler for SYS_ARCH_PROTECT().
 */
#ifndef LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
#define LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX     0
#endif

/** Set this to 1 to include a sanity check that SYS_ARCH_PROTECT() and
 * SYS_ARCH_UNPROTECT() are called matching.
 */
#ifndef LWIP_FREERTOS_SYS_ARCH_PROTECT_SANITY_CHECK
#define LWIP_FREERTOS_SYS_ARCH_PROTECT_SANITY_CHECK   0
#endif

/** Set this to 1 to let sys_mbox_free check that queues are empty when freed */
#ifndef LWIP_FREERTOS_CHECK_QUEUE_EMPTY_ON_FREE
#define LWIP_FREERTOS_CHECK_QUEUE_EMPTY_ON_FREE       0
#endif

/** Set this to 1 to enable core locking check functions in this port.
 * For this to work, you'll have to define LWIP_ASSERT_CORE_LOCKED()
 * and LWIP_MARK_TCPIP_THREAD() correctly in your lwipopts.h! */
#ifndef LWIP_FREERTOS_CHECK_CORE_LOCKING
#define LWIP_FREERTOS_CHECK_CORE_LOCKING              1
#endif

/** Set this to 0 to implement sys_now() yourself, e.g. using a hw timer.
 * Default is 1, where FreeRTOS ticks are used to calculate back to ms.
 */
#ifndef LWIP_FREERTOS_SYS_NOW_FROM_FREERTOS
#define LWIP_FREERTOS_SYS_NOW_FROM_FREERTOS           1
#endif

#if !configSUPPORT_DYNAMIC_ALLOCATION
# error "lwIP FreeRTOS port requires configSUPPORT_DYNAMIC_ALLOCATION"
#endif
#if !INCLUDE_vTaskDelay
# error "lwIP FreeRTOS port requires INCLUDE_vTaskDelay"
#endif
#if !INCLUDE_vTaskSuspend
# error "lwIP FreeRTOS port requires INCLUDE_vTaskSuspend"
#endif
#if LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX || !LWIP_COMPAT_MUTEX
#if !configUSE_MUTEXES
# error "lwIP FreeRTOS port requires configUSE_MUTEXES"
#endif
#endif

#if SYS_LIGHTWEIGHT_PROT && LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
static SemaphoreHandle_t sys_arch_protect_mutex;
#endif
#if SYS_LIGHTWEIGHT_PROT && LWIP_FREERTOS_SYS_ARCH_PROTECT_SANITY_CHECK
static sys_prot_t sys_arch_protect_nesting;
#endif

/* Initialize this module (see description in sys.h) */
void
sys_init(void)
{
#if SYS_LIGHTWEIGHT_PROT && LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
  /* initialize sys_arch_protect global mutex */
  sys_arch_protect_mutex = xSemaphoreCreateRecursiveMutex();
  LWIP_ASSERT("failed to create sys_arch_protect mutex",
    sys_arch_protect_mutex != NULL);
#endif /* SYS_LIGHTWEIGHT_PROT && LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX */
}

#if configUSE_16_BIT_TICKS == 1
#error This port requires 32 bit ticks or timer overflow will fail
#endif

#if LWIP_FREERTOS_SYS_NOW_FROM_FREERTOS
u32_t
sys_now(void)
{
  return xTaskGetTickCount() * portTICK_PERIOD_MS;
}
#endif

u32_t
sys_jiffies(void)
{
  return xTaskGetTickCount();
}

#if SYS_LIGHTWEIGHT_PROT

sys_prot_t
sys_arch_protect(void)
{
#if LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
  BaseType_t ret;
  LWIP_ASSERT("sys_arch_protect_mutex != NULL", sys_arch_protect_mutex != NULL);

  ret = xSemaphoreTakeRecursive(sys_arch_protect_mutex, portMAX_DELAY);
  LWIP_ASSERT("sys_arch_protect failed to take the mutex", ret == pdTRUE);
#else /* LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX */
  taskENTER_CRITICAL();
#endif /* LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX */
#if LWIP_FREERTOS_SYS_ARCH_PROTECT_SANITY_CHECK
  {
    /* every nested call to sys_arch_protect() returns an increased number */
    sys_prot_t ret = sys_arch_protect_nesting;
    sys_arch_protect_nesting++;
    LWIP_ASSERT("sys_arch_protect overflow", sys_arch_protect_nesting > ret);
    return ret;
  }
#else
  return 1;
#endif
}

void
sys_arch_unprotect(sys_prot_t pval)
{
#if LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
  BaseType_t ret;
#endif
#if LWIP_FREERTOS_SYS_ARCH_PROTECT_SANITY_CHECK
  LWIP_ASSERT("unexpected sys_arch_protect_nesting", sys_arch_protect_nesting > 0);
  sys_arch_protect_nesting--;
  LWIP_ASSERT("unexpected sys_arch_protect_nesting", sys_arch_protect_nesting == pval);
#endif

#if LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX
  LWIP_ASSERT("sys_arch_protect_mutex != NULL", sys_arch_protect_mutex != NULL);

  ret = xSemaphoreGiveRecursive(sys_arch_protect_mutex);
  LWIP_ASSERT("sys_arch_unprotect failed to give the mutex", ret == pdTRUE);
#else /* LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX */
  taskEXIT_CRITICAL();
#endif /* LWIP_FREERTOS_SYS_ARCH_PROTECT_USES_MUTEX */
  LWIP_UNUSED_ARG(pval);
}

#endif /* SYS_LIGHTWEIGHT_PROT */

void
sys_arch_msleep(u32_t delay_ms)
{
  TickType_t delay_ticks = delay_ms / portTICK_RATE_MS;
  vTaskDelay(delay_ticks);
}

#if !LWIP_COMPAT_MUTEX

/* Create a new mutex*/
err_t
sys_mutex_new(sys_mutex_t *mutex)
{
  LWIP_ASSERT("mutex != NULL", mutex != NULL);

  mutex->mut = xSemaphoreCreateRecursiveMutex();
  if(mutex->mut == NULL) {
    SYS_STATS_INC(mutex.err);
    return ERR_MEM;
  }
  SYS_STATS_INC_USED(mutex);
  return ERR_OK;
}

void
sys_mutex_lock(sys_mutex_t *mutex)
{
  BaseType_t ret;
  LWIP_ASSERT("mutex != NULL", mutex != NULL);
  LWIP_ASSERT("mutex->mut != NULL", mutex->mut != NULL);

  ret = xSemaphoreTakeRecursive(mutex->mut, portMAX_DELAY);
  LWIP_ASSERT("failed to take the mutex", ret == pdTRUE);
}

void
sys_mutex_unlock(sys_mutex_t *mutex)
{
  BaseType_t ret;
  LWIP_ASSERT("mutex != NULL", mutex != NULL);
  LWIP_ASSERT("mutex->mut != NULL", mutex->mut != NULL);

  ret = xSemaphoreGiveRecursive(mutex->mut);
  LWIP_ASSERT("failed to give the mutex", ret == pdTRUE);
}

void
sys_mutex_free(sys_mutex_t *mutex)
{
  LWIP_ASSERT("mutex != NULL", mutex != NULL);
  LWIP_ASSERT("mutex->mut != NULL", mutex->mut != NULL);

  SYS_STATS_DEC(mutex.used);
  vSemaphoreDelete(mutex->mut);
  mutex->mut = NULL;
}

#endif /* !LWIP_COMPAT_MUTEX */

err_t
sys_sem_new(sys_sem_t *sem, u8_t initial_count)
{
  LWIP_ASSERT("sem != NULL", sem != NULL);
  LWIP_ASSERT("initial_count invalid (not 0 or 1)",
    (initial_count == 0) || (initial_count == 1));

  sem->sem = xSemaphoreCreateBinary();
  if(sem->sem == NULL) {
    SYS_STATS_INC(sem.err);
    return ERR_MEM;
  }
  SYS_STATS_INC_USED(sem);

  if(initial_count == 1) {
    BaseType_t ret = xSemaphoreGive(sem->sem);
    LWIP_ASSERT("sys_sem_new: initial give failed", ret == pdTRUE);
  }
  return ERR_OK;
}

void
sys_sem_signal(sys_sem_t *sem)
{
  BaseType_t ret;
  LWIP_ASSERT("sem != NULL", sem != NULL);
  LWIP_ASSERT("sem->sem != NULL", sem->sem != NULL);

  ret = xSemaphoreGive(sem->sem);
  /* queue full is OK, this is a signal only... */
  LWIP_ASSERT("sys_sem_signal: sane return value",
    (ret == pdTRUE) || (ret == errQUEUE_FULL));
}

u32_t
sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout_ms)
{
  BaseType_t ret;
  LWIP_ASSERT("sem != NULL", sem != NULL);
  LWIP_ASSERT("sem->sem != NULL", sem->sem != NULL);

  if(!timeout_ms) {
    /* wait infinite */
    ret = xSemaphoreTake(sem->sem, portMAX_DELAY);
    LWIP_ASSERT("taking semaphore failed", ret == pdTRUE);
  } else {
    TickType_t timeout_ticks = timeout_ms / portTICK_RATE_MS;
    ret = xSemaphoreTake(sem->sem, timeout_ticks);
    if (ret == errQUEUE_EMPTY) {
      /* timed out */
      return SYS_ARCH_TIMEOUT;
    }
    LWIP_ASSERT("taking semaphore failed", ret == pdTRUE);
  }

  /* Old versions of lwIP required us to return the time waited.
     This is not the case any more. Just returning != SYS_ARCH_TIMEOUT
     here is enough. */
  return 1;
}

void
sys_sem_free(sys_sem_t *sem)
{
  LWIP_ASSERT("sem != NULL", sem != NULL);
  LWIP_ASSERT("sem->sem != NULL", sem->sem != NULL);

  SYS_STATS_DEC(sem.used);
  vSemaphoreDelete(sem->sem);
  sem->sem = NULL;
}

err_t
sys_mbox_new(sys_mbox_t *mbox, int size)
{
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("size > 0", size > 0);

  mbox->mbx = xQueueCreate((UBaseType_t)size, sizeof(void *));
  if(mbox->mbx == NULL) {
    SYS_STATS_INC(mbox.err);
    return ERR_MEM;
  }
  SYS_STATS_INC_USED(mbox);
  return ERR_OK;
}

void
sys_mbox_post(sys_mbox_t *mbox, void *msg)
{
  BaseType_t ret;
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

  ret = xQueueSendToBack(mbox->mbx, &msg, portMAX_DELAY);
  LWIP_ASSERT("mbox post failed", ret == pdTRUE);
}

err_t
sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
{
  BaseType_t ret;
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

  ret = xQueueSendToBack(mbox->mbx, &msg, 0);
  if (ret == pdTRUE) {
    return ERR_OK;
  } else {
    LWIP_ASSERT("mbox trypost failed", ret == errQUEUE_FULL);
    SYS_STATS_INC(mbox.err);
    return ERR_MEM;
  }
}

err_t
sys_mbox_trypost_fromisr(sys_mbox_t *mbox, void *msg)
{
  BaseType_t ret;
  BaseType_t xHigherPriorityTaskWoken = pdFALSE;
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

  ret = xQueueSendToBackFromISR(mbox->mbx, &msg, &xHigherPriorityTaskWoken);
  if (ret == pdTRUE) {
    if (xHigherPriorityTaskWoken == pdTRUE) {
      return ERR_NEED_SCHED;
    }
    return ERR_OK;
  } else {
    LWIP_ASSERT("mbox trypost failed", ret == errQUEUE_FULL);
    SYS_STATS_INC(mbox.err);
    return ERR_MEM;
  }
}

u32_t
sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout_ms)
{
  BaseType_t ret;
  void *msg_dummy;
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

  if (!msg) {
    msg = &msg_dummy;
  }

  if (!timeout_ms) {
    /* wait infinite */
    ret = xQueueReceive(mbox->mbx, &(*msg), portMAX_DELAY);
    LWIP_ASSERT("mbox fetch failed", ret == pdTRUE);
  } else {
    TickType_t timeout_ticks = timeout_ms / portTICK_RATE_MS;
    ret = xQueueReceive(mbox->mbx, &(*msg), timeout_ticks);
    if (ret == errQUEUE_EMPTY) {
      /* timed out */
      *msg = NULL;
      return SYS_ARCH_TIMEOUT;
    }
    LWIP_ASSERT("mbox fetch failed", ret == pdTRUE);
  }

  /* Old versions of lwIP required us to return the time waited.
     This is not the case any more. Just returning != SYS_ARCH_TIMEOUT
     here is enough. */
  return 1;
}

u32_t
sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg)
{
  BaseType_t ret;
  void *msg_dummy;
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

  if (!msg) {
    msg = &msg_dummy;
  }

  ret = xQueueReceive(mbox->mbx, &(*msg), 0);
  if (ret == errQUEUE_EMPTY) {
    *msg = NULL;
    return SYS_MBOX_EMPTY;
  }
  LWIP_ASSERT("mbox fetch failed", ret == pdTRUE);

  return 0;
}

void
sys_mbox_free(sys_mbox_t *mbox)
{
  LWIP_ASSERT("mbox != NULL", mbox != NULL);
  LWIP_ASSERT("mbox->mbx != NULL", mbox->mbx != NULL);

#if LWIP_FREERTOS_CHECK_QUEUE_EMPTY_ON_FREE
  {
    UBaseType_t msgs_waiting = uxQueueMessagesWaiting(mbox->mbx);
    LWIP_ASSERT("mbox quence not empty", msgs_waiting == 0);

    if (msgs_waiting != 0) {
      SYS_STATS_INC(mbox.err);
    }
  }
#endif

  vQueueDelete(mbox->mbx);

  SYS_STATS_DEC(mbox.used);
}

sys_thread_t
sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stacksize, int prio)
{
  TaskHandle_t rtos_task;
  BaseType_t ret;
  sys_thread_t lwip_thread;
  size_t rtos_stacksize;

  LWIP_ASSERT("invalid stacksize", stacksize > 0);
#if LWIP_FREERTOS_THREAD_STACKSIZE_IS_STACKWORDS
  rtos_stacksize = (size_t)stacksize;
#else
  rtos_stacksize = (size_t)stacksize / sizeof(StackType_t);
#endif

  /* lwIP's lwip_thread_fn matches FreeRTOS' TaskFunction_t, so we can pass the
     thread function without adaption here. */
  ret = xTaskCreate(thread, name, (configSTACK_DEPTH_TYPE)rtos_stacksize, arg, prio, &rtos_task);
  LWIP_ASSERT("task creation failed", ret == pdTRUE);

  lwip_thread.thread_handle = rtos_task;
  return lwip_thread;
}

#if LWIP_NETCONN_SEM_PER_THREAD
#if configNUM_THREAD_LOCAL_STORAGE_POINTERS > 0

sys_sem_t *
sys_arch_netconn_sem_get(void)
{
  void* ret;
  TaskHandle_t task = xTaskGetCurrentTaskHandle();
  LWIP_ASSERT("task != NULL", task != NULL);

  ret = pvTaskGetThreadLocalStoragePointer(task, 0);
  return ret;
}

void
sys_arch_netconn_sem_alloc(void)
{
  void *ret;
  TaskHandle_t task = xTaskGetCurrentTaskHandle();
  LWIP_ASSERT("task != NULL", task != NULL);

  ret = pvTaskGetThreadLocalStoragePointer(task, 0);
  if(ret == NULL) {
    sys_sem_t *sem;
    err_t err;
    /* need to allocate the memory for this semaphore */
    sem = mem_malloc(sizeof(sys_sem_t));
    LWIP_ASSERT("sem != NULL", sem != NULL);
    err = sys_sem_new(sem, 0);
    LWIP_ASSERT("err == ERR_OK", err == ERR_OK);
    LWIP_ASSERT("sem invalid", sys_sem_valid(sem));
    vTaskSetThreadLocalStoragePointer(task, 0, sem);
  }
}

void sys_arch_netconn_sem_free(void)
{
  void* ret;
  TaskHandle_t task = xTaskGetCurrentTaskHandle();
  LWIP_ASSERT("task != NULL", task != NULL);

  ret = pvTaskGetThreadLocalStoragePointer(task, 0);
  if(ret != NULL) {
    sys_sem_t *sem = ret;
    sys_sem_free(sem);
    mem_free(sem);
    vTaskSetThreadLocalStoragePointer(task, 0, NULL);
  }
}

#else /* configNUM_THREAD_LOCAL_STORAGE_POINTERS > 0 */
#error LWIP_NETCONN_SEM_PER_THREAD needs configNUM_THREAD_LOCAL_STORAGE_POINTERS
#endif /* configNUM_THREAD_LOCAL_STORAGE_POINTERS > 0 */

#endif /* LWIP_NETCONN_SEM_PER_THREAD */

#if LWIP_FREERTOS_CHECK_CORE_LOCKING
#if LWIP_TCPIP_CORE_LOCKING

/** Flag the core lock held. A counter for recursive locks. */
static u8_t lwip_core_lock_count;
static TaskHandle_t lwip_core_lock_holder_thread;

void
sys_lock_tcpip_core(void)
{
   sys_mutex_lock(&lock_tcpip_core);
   if (lwip_core_lock_count == 0) {
     lwip_core_lock_holder_thread = xTaskGetCurrentTaskHandle();
   }
   lwip_core_lock_count++;
}

void
sys_unlock_tcpip_core(void)
{
   lwip_core_lock_count--;
   if (lwip_core_lock_count == 0) {
       lwip_core_lock_holder_thread = 0;
   }
   sys_mutex_unlock(&lock_tcpip_core);
}

#endif /* LWIP_TCPIP_CORE_LOCKING */

#if !NO_SYS
static TaskHandle_t lwip_tcpip_thread;
#endif

void
sys_mark_tcpip_thread(void)
{
#if !NO_SYS
  lwip_tcpip_thread = xTaskGetCurrentTaskHandle();
#endif
}

void
sys_check_core_locking(void)
{
  /* Embedded systems should check we are NOT in an interrupt context here */
  /* E.g. core Cortex-M3/M4 ports:
         configASSERT( ( portNVIC_INT_CTRL_REG & portVECTACTIVE_MASK ) == 0 );

     Instead, we use more generic FreeRTOS functions here, which should fail from ISR: */
  taskENTER_CRITICAL();
  taskEXIT_CRITICAL();

#if !NO_SYS
  if (lwip_tcpip_thread != 0) {
    TaskHandle_t current_thread = xTaskGetCurrentTaskHandle();

#if LWIP_TCPIP_CORE_LOCKING
    LWIP_ASSERT("Function called without core lock",
                current_thread == lwip_core_lock_holder_thread && lwip_core_lock_count > 0);
#else /* LWIP_TCPIP_CORE_LOCKING */
    LWIP_ASSERT("Function called from wrong thread", current_thread == lwip_tcpip_thread);
#endif /* LWIP_TCPIP_CORE_LOCKING */
  }
#endif /* !NO_SYS */
}

#endif /* LWIP_FREERTOS_CHECK_CORE_LOCKING*/

Lwipopts.h

配置

/**
 * @file
 *
 * lwIP Options Configuration
 */

/*
 * 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.
 *
 * Author: Adam Dunkels < [e-mail] >
 *
 */
#ifndef LWIP_LWIPOPTS_H
#define LWIP_LWIPOPTS_H

/*
 * Include user defined options first. Anything not defined in these files
 * will be set to standard values. Override anything you don't like!
 */
#include "lwipopts.h"
#include "lwip/debug.h"
#include "os_mem.h"

#define LWIP_PROVIDE_ERRNO 1
#define LWIP_COMPAT_MUTEX 0
#define LWIP_DEBUG 1

#define DEFAULT_THREAD_PRIO 7
#define DEFAULT_THREAD_STACKSIZE 1024
#define TCPIP_THREAD_STACKSIZE 1024
#define TCPIP_THREAD_PRIO 7
#define SNMP_STACK_SIZE  1024
#define SNMP_THREAD_PRIO 7
#define SLIPIF_THREAD_STACKSIZE 1024
#define SLIPIF_THREAD_PRIO 7

#define MEMP_MEM_MALLOC 1
#define MEM_LIBC_MALLOC 1
#define mem_clib_malloc(size) os_mem_malloc(0,size)
#define mem_clib_free os_mem_free
#define mem_clib_calloc(cnt,size) os_mem_calloc(0,(cnt)*(size))

#define DEFAULT_RAW_RECVMBOX_SIZE 10
#define DEFAULT_UDP_RECVMBOX_SIZE 10
#define DEFAULT_TCP_RECVMBOX_SIZE 10
#define TCPIP_MBOX_SIZE  10
#define DEFAULT_ACCEPTMBOX_SIZE 10

#define TCP_MSS (1500 - 40)

#define TCP_SND_BUF (11*TCP_MSS)
#define TCP_WND (11*TCP_MSS)
/*
   -----------------------------------------------
   ---------- Platform specific locking ----------
   -----------------------------------------------
*/

/**
 * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
 * critical regions during buffer allocation, deallocation and memory
 * allocation and deallocation.
 */
#define SYS_LIGHTWEIGHT_PROT            0

/**
 * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
 * use lwIP facilities.
 */
#define NO_SYS                          0

/*
   ------------------------------------
   ---------- Memory options ----------
   ------------------------------------
*/

/**
 * MEM_ALIGNMENT: should be set to the alignment of the CPU
 *    4 byte alignment -> #define MEM_ALIGNMENT 4
 *    2 byte alignment -> #define MEM_ALIGNMENT 2
 */
#define MEM_ALIGNMENT                   4U

/**
 * MEM_SIZE: the size of the heap memory. If the application will send
 * a lot of data that needs to be copied, this should be set high.
 */
#define MEM_SIZE                        1600

/*
   ------------------------------------------------
   ---------- Internal Memory Pool Sizes ----------
   ------------------------------------------------
*/
/**
 * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
 * If the application sends a lot of data out of ROM (or other static memory),
 * this should be set high.
 */
#define MEMP_NUM_PBUF                   160

/**
 * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
 * (requires the LWIP_RAW option)
 */
#define MEMP_NUM_RAW_PCB                4

/**
 * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
 * per active UDP "connection".
 * (requires the LWIP_UDP option)
 */
#define MEMP_NUM_UDP_PCB                4

/**
 * MEMP_NUM_TCP_PCB: the number of simulatenously active TCP connections.
 * (requires the LWIP_TCP option)
 */
#define MEMP_NUM_TCP_PCB                4

/**
 * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
 * (requires the LWIP_TCP option)
 */
#define MEMP_NUM_TCP_PCB_LISTEN         4

/**
 * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
 * (requires the LWIP_TCP option)
 */
#define MEMP_NUM_TCP_SEG                160

/**
 * MEMP_NUM_REASSDATA: the number of simultaneously IP packets queued for
 * reassembly (whole packets, not fragments!)
 */
#define MEMP_NUM_REASSDATA              1

/**
 * MEMP_NUM_ARP_QUEUE: the number of simulateously queued outgoing
 * packets (pbufs) that are waiting for an ARP request (to resolve
 * their destination address) to finish.
 * (requires the ARP_QUEUEING option)
 */
#define MEMP_NUM_ARP_QUEUE              2

/**
 * MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts.
 * (requires NO_SYS==0)
 */
#define MEMP_NUM_SYS_TIMEOUT            8

/**
 * MEMP_NUM_NETBUF: the number of struct netbufs.
 * (only needed if you use the sequential API, like api_lib.c)
 */
#define MEMP_NUM_NETBUF                 2

/**
 * MEMP_NUM_NETCONN: the number of struct netconns.
 * (only needed if you use the sequential API, like api_lib.c)
 */
#define MEMP_NUM_NETCONN               32

/**
 * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used
 * for callback/timeout API communication.
 * (only needed if you use tcpip.c)
 */
#define MEMP_NUM_TCPIP_MSG_API          8

/**
 * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used
 * for incoming packets.
 * (only needed if you use tcpip.c)
 */
#define MEMP_NUM_TCPIP_MSG_INPKT        8

/**
 * PBUF_POOL_SIZE: the number of buffers in the pbuf pool.
 */
#define PBUF_POOL_SIZE                  64

/*
   ---------------------------------
   ---------- ARP options ----------
   ---------------------------------
*/
/**
 * LWIP_ARP==1: Enable ARP functionality.
 */
#define LWIP_ARP                        1

/*
   --------------------------------
   ---------- IP options ----------
   --------------------------------
*/
/**
 * IP_FORWARD==1: Enables the ability to forward IP packets across network
 * interfaces. If you are going to run lwIP on a device with only one network
 * interface, define this to 0.
 */
#define IP_FORWARD                      0

/**
 * IP_OPTIONS: Defines the behavior for IP options.
 *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
 *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
 */
#define IP_OPTIONS_ALLOWED              1

/**
 * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
 * this option does not affect outgoing packet sizes, which can be controlled
 * via IP_FRAG.
 */
#define IP_REASSEMBLY                   1

/**
 * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
 * that this option does not affect incoming packet sizes, which can be
 * controlled via IP_REASSEMBLY.
 */
#define IP_FRAG                         1

/**
 * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
 * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
 * in this time, the whole packet is discarded.
 */
#define IP_REASS_MAXAGE                 3

/**
 * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
 * Since the received pbufs are enqueued, be sure to configure
 * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
 * packets even if the maximum amount of fragments is enqueued for reassembly!
 */
#define IP_REASS_MAX_PBUFS              4

/**
 * IP_FRAG_USES_STATIC_BUF==1: Use a static MTU-sized buffer for IP
 * fragmentation. Otherwise pbufs are allocated and reference the original
    * packet data to be fragmented.
*/
#define IP_FRAG_USES_STATIC_BUF         0

/**
 * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers.
 */
#define IP_DEFAULT_TTL                  255

/*
   ----------------------------------
   ---------- ICMP options ----------
   ----------------------------------
*/
/**
 * LWIP_ICMP==1: Enable ICMP module inside the IP stack.
 * Be careful, disable that make your product non-compliant to RFC1122
 */
#define LWIP_ICMP                       1

/*
   ---------------------------------
   ---------- RAW options ----------
   ---------------------------------
*/
/**
 * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
 */
#define LWIP_RAW                        1

/*
   ----------------------------------
   ---------- DHCP options ----------
   ----------------------------------
*/
/**
 * LWIP_DHCP==1: Enable DHCP module.
 */
#define LWIP_DHCP                       0


/*
   ------------------------------------
   ---------- AUTOIP options ----------
   ------------------------------------
*/
/**
 * LWIP_AUTOIP==1: Enable AUTOIP module.
 */
#define LWIP_AUTOIP                     0

/*
   ----------------------------------
   ---------- SNMP options ----------
   ----------------------------------
*/
/**
 * LWIP_SNMP==1: Turn on SNMP module. UDP must be available for SNMP
 * transport.
 */
#define LWIP_SNMP                       0

/*
   ----------------------------------
   ---------- IGMP options ----------
   ----------------------------------
*/
/**
 * LWIP_IGMP==1: Turn on IGMP module.
 */
#define LWIP_IGMP                       0

/*
   ----------------------------------
   ---------- DNS options -----------
   ----------------------------------
*/
/**
 * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS
 * transport.
 */
#define LWIP_DNS                        0

/*
   ---------------------------------
   ---------- UDP options ----------
   ---------------------------------
*/
/**
 * LWIP_UDP==1: Turn on UDP.
 */
#define LWIP_UDP                        1

/*
   ---------------------------------
   ---------- TCP options ----------
   ---------------------------------
*/
/**
 * LWIP_TCP==1: Turn on TCP.
 */
#define LWIP_TCP                        1

#define LWIP_LISTEN_BACKLOG             0

/*
   ----------------------------------
   ---------- Pbuf options ----------
   ----------------------------------
*/
/**
 * PBUF_LINK_HLEN: the number of bytes that should be allocated for a
 * link level header. The default is 14, the standard value for
 * Ethernet.
 */
#define PBUF_LINK_HLEN                  16

/**
 * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
 * designed to accommodate single full size TCP frame in one pbuf, including
 * TCP_MSS, IP header, and link header.
*
 */
#define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_HLEN)

/*
   ------------------------------------
   ---------- LOOPIF options ----------
   ------------------------------------
*/
/**
 * LWIP_HAVE_LOOPIF==1: Support loop interface (127.0.0.1) and loopif.c
 */
#define LWIP_HAVE_LOOPIF                0

/*
   ----------------------------------------------
   ---------- Sequential layer options ----------
   ----------------------------------------------
*/

/**
 * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
 */
#define LWIP_NETCONN                    1

/*
   ------------------------------------
   ---------- Socket options ----------
   ------------------------------------
*/
/**
 * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
 */
#define LWIP_SOCKET                     1

/**
 * SO_REUSE==1: Enable SO_REUSEADDR
 */
#define SO_REUSE                        1

/*
   ----------------------------------------
   ---------- Statistics options ----------
   ----------------------------------------
*/
/**
 * LWIP_STATS==1: Enable statistics collection in lwip_stats.
 */
#define LWIP_STATS                      0
/*
   ---------------------------------
   ---------- PPP options ----------
   ---------------------------------
*/
/**
 * PPP_SUPPORT==1: Enable PPP.
 */
#define PPP_SUPPORT                     0



/*
   ---------------------------------------
   ---------- Threading options ----------
   ---------------------------------------
*/

#define LWIP_TCPIP_CORE_LOCKING    0

#if !NO_SYS
void sys_check_core_locking(void);
#define LWIP_ASSERT_CORE_LOCKED()  sys_check_core_locking()
#endif

#endif /* LWIP_LWIPOPTS_H */

Perf.c/h

#ifndef LWIP_ARCH_PERF_H
#define LWIP_ARCH_PERF_H

#include < stdint.h >

struct tms {
  uint32_t    tms_utime;    /* user time */
  uint32_t  tms_stime;    /* system time */
  uint32_t  tms_cutime;    /* user time, children */
  uint32_t  tms_cstime;    /* system time, children */
};

void perf_times(struct tms *t);
void perf_print_times(struct tms *start, struct tms *end, char *key);

//#define PERF 1

#ifdef PERF
#define PERF_START   struct tms __perf_start;
                     struct tms __perf_end; 
                     perf_times(&__perf_start)
#define PERF_STOP(x) perf_times(&__perf_end); 
                     perf_print_times(&__perf_start, &__perf_end, x);
#else /* PERF */
#define PERF_START    /* null definition */
#define PERF_STOP(x)  /* null definition */
#endif /* PERF */

#endif /* LWIP_ARCH_PERF_H */

#include < stdio.h >

#include "arch/perf.h"

extern uint32_t sys_now(void);
void perf_times(struct tms *t)
{
  t->tms_stime = sys_now();
}

void perf_print_times(struct tms *start, struct tms *end, char *key)
{
  printf("%s: %lumSn", key, end->tms_stime - start->tms_stime);
}

Portethif.c/f

#ifndef LWIP_ARCH_PERF_H
#define LWIP_ARCH_PERF_H

#include < stdint.h >

struct tms {
  uint32_t    tms_utime;    /* user time */
  uint32_t  tms_stime;    /* system time */
  uint32_t  tms_cutime;    /* user time, children */
  uint32_t  tms_cstime;    /* system time, children */
};

void perf_times(struct tms *t);
void perf_print_times(struct tms *start, struct tms *end, char *key);

//#define PERF 1

#ifdef PERF
#define PERF_START   struct tms __perf_start;
                     struct tms __perf_end; 
                     perf_times(&__perf_start)
#define PERF_STOP(x) perf_times(&__perf_end); 
                     perf_print_times(&__perf_start, &__perf_end, x);
#else /* PERF */
#define PERF_START    /* null definition */
#define PERF_STOP(x)  /* null definition */
#endif /* PERF */

#endif /* LWIP_ARCH_PERF_H */

#include < stdio.h >

#include "arch/perf.h"

extern uint32_t sys_now(void);
void perf_times(struct tms *t)
{
  t->tms_stime = sys_now();
}

void perf_print_times(struct tms *start, struct tms *end, char *key)
{
  printf("%s: %lumSn", key, end->tms_stime - start->tms_stime);
}

系统接口

Lwipopts.h中

有OS则NO_SYS配置为0

#define NO_SYS 0

此时Sys_arch.h/sys_arch.c需要实现以下接口

sys_init

sys_now 获取ms值

sys_jiffies获取滴答值

sys_arch_msleep

sys_sem_new

sys_sem_signal

sys_arch_sem_wait

sys_sem_free

LWIP_COMPAT_MUTEX为0时实现以下互斥量接口，否则自动使用信号量实现

sys_mutex_new

sys_mutex_lock

sys_mutex_unlock

sys_mutex_free

sys_mbox_new

sys_mbox_post

sys_mbox_trypost

sys_mbox_trypost_fromisr

sys_arch_mbox_fetch

sys_arch_mbox_tryfetch

sys_mbox_free

需要设置消息邮箱的大小

#define DEFAULT_RAW_RECVMBOX_SIZE 10

#define DEFAULT_UDP_RECVMBOX_SIZE 10

#define DEFAULT_TCP_RECVMBOX_SIZE 10

#define TCPIP_MBOX_SIZE  10

sys_thread_new

配置默认线程栈大小和优先级

#define DEFAULT_THREAD_PRIO 7

#define DEFAULT_THREAD_STACKSIZE 1024

#define TCPIP_THREAD_STACKSIZE 1024

#define TCPIP_THREAD_PRIO 7

#define SNMP_STACK_SIZE  1024

#define SNMP_THREAD_PRIO 7

#define SLIPIF_THREAD_STACKSIZE 1024

#define SLIPIF_THREAD_PRIO 7

如果使能LWIP_NETCONN_SEM_PER_THREAD

sys_arch_netconn_sem_get

sys_arch_netconn_sem_alloc

sys_arch_netconn_sem_free

如果使能LWIP_FREERTOS_CHECK_CORE_LOCKING和

LWIP_TCPIP_CORE_LOCKING

sys_lock_tcpip_core

sys_unlock_tcpip_core

sys_mark_tcpip_thread

sys_check_core_locking

SYS_LIGHTWEIGHT_PROT使能时

sys_arch_protect

sys_arch_unprotect

错误码处理

Lwipopts.h中

#define LWIP_PROVIDE_ERRNO 1

则使用LWIP自己实现的errno.h相关错误码和接口。

互斥量使用

如果有互斥量则

Lwipopts.h中

#define LWIP_COMPAT_MUTEX 0

如果定义为1则使用信号量替代互斥量

Sys.h中

#define sys_mutex_t                   sys_sem_t

#define sys_mutex_new(mutex)          sys_sem_new(mutex, 1)

#define sys_mutex_lock(mutex)         sys_sem_wait(mutex)

#define sys_mutex_unlock(mutex)       sys_sem_signal(mutex)

#define sys_mutex_free(mutex)         sys_sem_free(mutex)

#define sys_mutex_valid(mutex)        sys_sem_valid(mutex)

#define sys_mutex_set_invalid(mutex)  sys_sem_set_invalid(mutex)

LOCK Check

Sys_arch.c中

#define LWIP_FREERTOS_CHECK_CORE_LOCKING 1

Lwipopts.h中

#define LWIP_TCPIP_CORE_LOCKING 1

堆配置

有OS了我们可以直接使用OS提供的堆管理，LWIP的堆和内存池参见前两篇文章分析。

Lwipopts.h中

配置内存池memp.c使用堆实现mem_malloc,mem_free

#define MEMP_MEM_MALLOC 1

配置使用系统的堆管理

#define MEM_LIBC_MALLOC 1

此时MEM_USE_POOLS必须为0

实现以下几个接口

mem_clib_free

mem_clib_malloc

mem_clib_calloc

另外就是配置使用内存池的各个组建的内存池大小

MEMP_NUM_xxx

时间

在系统接口中实现

sys_now

sys_jiffies

断言

不定义LWIP_ASSERT

debug.h中

#ifndef LWIP_NOASSERT

#define LWIP_ASSERT(message, assertion) do { if (!(assertion)) { 

LWIP_PLATFORM_ASSERT(message); }} while(0)

#else  /* LWIP_NOASSERT */

#define LWIP_ASSERT(message, assertion)

#endif /* LWIP_NOASSERT */

未定义LWIP_PLATFORM_ASSERT则

#ifndef LWIP_PLATFORM_ASSERT

#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion "%s" failed at line %d in %sn", 

                                   x, __LINE__, __FILE__); fflush(NULL); abort();} while(0)

#include < stdio.h >

#include < stdlib.h >

#endif

如果有printf可以cc.h中定义为

#define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion "%s" failed at line %d in %sn", 

                                   x, __LINE__, __FILE__);} while(0)

调试

使能配置LWIP_DEBUG

实现LWIP_PLATFORM_DIAG行

arch.h中默认是

#ifndef LWIP_PLATFORM_DIAG

#define LWIP_PLATFORM_DIAG(x) do {printf x;} while(0)

#include < stdio.h >

#include < stdlib.h >

#endif

LWIP_DBG_ON

LWIP_DBG_TYPES_ON

LWIP_DBG_MASK_LEVEL

三.tcp测试

复制contribappstcpecho下的tcpeco.c/h到自己工程中

调用

tcpecho_init

初始化

关键初始化过程

tcpip_init(0,0);

netif_add(&netif, (const ip_addr_t *)&ipaddr, (const ip_addr_t *)&netmask, (const ip_addr_t *)&gw, NULL, &lwip_port_eth_init, ðernet_input);

netif_set_default(&netif);

if (netif_is_link_up(&netif))

{

netif_set_up(&netif);

}

else

{

netif_set_down(&netif);

}

tcpecho_init(); //port 7

PC作为客户端

四.tcp性能测试

添加以下代码到自己的工程

srcappslwiperflwiperf.c

srcincludelwipappslwiperf.h

contribexampleslwiperflwiperf_example.c/h

端口为lwiperf.h中定义

#define LWIPERF_TCP_PORT_DEFAULT 5001

调用

lwiperf_example_init();

初始化

使用Jperf

PC为client模式

审核编辑 黄宇