stm32-ucos移植lwip-1（raw）

之前在裸机环境下移植了lwip，功能还是很强大的，但是就我看来，这和uip其实差别也不大，其实lwip更强大的功能需要在操作系统之下才能发挥出来，今天就来做这个

首先我们需要移植操作系统，系统选择ucos2.91，移植过程网上都有，我就写点不同的

配置文件修改如下

/* ---------------------- MISCELLANEOUS ----------------------- */
#define OS_APP_HOOKS_EN           0u   /* Application-defined hooks are called from the uC/OS-II hooks */
#define OS_ARG_CHK_EN             0u   /* Enable (1) or Disable (0) argument checking                  */
#define OS_CPU_HOOKS_EN           1u   /* uC/OS-II hooks are found in the processor port files         */

#define OS_DEBUG_EN               0u   /* Enable(1) debug variables                                    */

#define OS_EVENT_MULTI_EN         0u   /* Include code for OSEventPendMulti()                          */
#define OS_EVENT_NAME_EN          0u   /* Enable names for Sem, Mutex, Mbox and Q                      */

#define OS_LOWEST_PRIO           63u   /* Defines the lowest priority that can be assigned ...         */
                                       /* ... MUST NEVER be higher than 254!                           */

#define OS_MAX_EVENTS            10u   /* Max. number of event control blocks in your application      */
#define OS_MAX_FLAGS              5u   /* Max. number of Event Flag Groups    in your application      */
#define OS_MAX_MEM_PART           0u   /* Max. number of memory partitions                             */
#define OS_MAX_QS                 5u   /* Max. number of queue control blocks in your application      */
#define OS_MAX_TASKS             10u   /* Max. number of tasks in your application, MUST be >= 2       */

#define OS_SCHED_LOCK_EN          1u   /* Include code for OSSchedLock() and OSSchedUnlock()           */

#define OS_TICK_STEP_EN           1u   /* Enable tick stepping feature for uC/OS-View                  */
#define OS_TICKS_PER_SEC           200u   /* Set the number of ticks in one second 1000/200 = 5 5ms中断一次 */

                                       /* --------------------- TASK STACK SIZE ---------------------- */
#define OS_TASK_TMR_STK_SIZE    128u   /* Timer      task stack size (# of OS_STK wide entries)        */
#define OS_TASK_STAT_STK_SIZE   128u   /* Statistics task stack size (# of OS_STK wide entries)        */
#define OS_TASK_IDLE_STK_SIZE   128u   /* Idle       task stack size (# of OS_STK wide entries)        */

                                       /* --------------------- TASK MANAGEMENT ---------------------- */
#define OS_TASK_CHANGE_PRIO_EN    1u   /*     Include code for OSTaskChangePrio()                      */
#define OS_TASK_CREATE_EN         1u   /*     Include code for OSTaskCreate()                          */
#define OS_TASK_CREATE_EXT_EN     1u   /*     Include code for OSTaskCreateExt()                       */
#define OS_TASK_DEL_EN            1u   /*     Include code for OSTaskDel()                             */
#define OS_TASK_NAME_EN           1u   /*     Enable task names                                        */
#define OS_TASK_PROFILE_EN        1u   /*     Include variables in OS_TCB for profiling                */
#define OS_TASK_QUERY_EN          1u   /*     Include code for OSTaskQuery()                           */
#define OS_TASK_REG_TBL_SIZE      1u   /*     Size of task variables array (#of INT32U entries)        */
#define OS_TASK_STAT_EN           1u   /*     Enable (1) or Disable(0) the statistics task             */
#define OS_TASK_STAT_STK_CHK_EN   1u   /*     Check task stacks from statistic task                    */
#define OS_TASK_SUSPEND_EN        1u   /*     Include code for OSTaskSuspend() and OSTaskResume()      */
#define OS_TASK_SW_HOOK_EN        1u   /*     Include code for OSTaskSwHook()                          */

                                       /* ----------------------- EVENT FLAGS ------------------------ */
#define OS_FLAG_EN                1u   /* Enable (1) or Disable (0) code generation for EVENT FLAGS    */
#define OS_FLAG_ACCEPT_EN         1u   /*     Include code for OSFlagAccept()                          */
#define OS_FLAG_DEL_EN            1u   /*     Include code for OSFlagDel()                             */
#define OS_FLAG_NAME_EN           1u   /*     Enable names for event flag group                        */
#define OS_FLAG_QUERY_EN          1u   /*     Include code for OSFlagQuery()                           */
#define OS_FLAG_WAIT_CLR_EN       1u   /* Include code for Wait on Clear EVENT FLAGS                   */
#define OS_FLAGS_NBITS           16u   /* Size in #bits of OS_FLAGS data type (8, 16 or 32)            */

                                       /* -------------------- MESSAGE MAILBOXES --------------------- */
#define OS_MBOX_EN                1u   /* Enable (1) or Disable (0) code generation for MAILBOXES      */
#define OS_MBOX_ACCEPT_EN         1u   /*     Include code for OSMboxAccept()                          */
#define OS_MBOX_DEL_EN            1u   /*     Include code for OSMboxDel()                             */
#define OS_MBOX_PEND_ABORT_EN     1u   /*     Include code for OSMboxPendAbort()                       */
#define OS_MBOX_POST_EN           1u   /*     Include code for OSMboxPost()                            */
#define OS_MBOX_POST_OPT_EN       1u   /*     Include code for OSMboxPostOpt()                         */
#define OS_MBOX_QUERY_EN          1u   /*     Include code for OSMboxQuery()                           */

                                       /* --------------------- MEMORY MANAGEMENT -------------------- */
#define OS_MEM_EN                 1u   /* Enable (1) or Disable (0) code generation for MEMORY MANAGER */
#define OS_MEM_NAME_EN            1u   /*     Enable memory partition names                            */
#define OS_MEM_QUERY_EN           1u   /*     Include code for OSMemQuery()                            */

                                       /* ---------------- MUTUAL EXCLUSION SEMAPHORES --------------- */
#define OS_MUTEX_EN               1u   /* Enable (1) or Disable (0) code generation for MUTEX          */
#define OS_MUTEX_ACCEPT_EN        1u   /*     Include code for OSMutexAccept()                         */
#define OS_MUTEX_DEL_EN           1u   /*     Include code for OSMutexDel()                            */
#define OS_MUTEX_QUERY_EN         1u   /*     Include code for OSMutexQuery()                          */

                                       /* ---------------------- MESSAGE QUEUES ---------------------- */
#define OS_Q_EN                   1u   /* Enable (1) or Disable (0) code generation for QUEUES         */
#define OS_Q_ACCEPT_EN            1u   /*     Include code for OSQAccept()                             */
#define OS_Q_DEL_EN               1u   /*     Include code for OSQDel()                                */
#define OS_Q_FLUSH_EN             1u   /*     Include code for OSQFlush()                              */
#define OS_Q_PEND_ABORT_EN        1u   /*     Include code for OSQPendAbort()                          */
#define OS_Q_POST_EN              1u   /*     Include code for OSQPost()                               */
#define OS_Q_POST_FRONT_EN        1u   /*     Include code for OSQPostFront()                          */
#define OS_Q_POST_OPT_EN          1u   /*     Include code for OSQPostOpt()                            */
#define OS_Q_QUERY_EN             1u   /*     Include code for OSQQuery()                              */

                                       /* ------------------------ SEMAPHORES ------------------------ */
#define OS_SEM_EN                 1u   /* Enable (1) or Disable (0) code generation for SEMAPHORES     */
#define OS_SEM_ACCEPT_EN          1u   /*    Include code for OSSemAccept()                            */
#define OS_SEM_DEL_EN             1u   /*    Include code for OSSemDel()                               */
#define OS_SEM_PEND_ABORT_EN      1u   /*    Include code for OSSemPendAbort()                         */
#define OS_SEM_QUERY_EN           1u   /*    Include code for OSSemQuery()                             */
#define OS_SEM_SET_EN             1u   /*    Include code for OSSemSet()                               */

                                       /* --------------------- TIME MANAGEMENT ---------------------- */
#define OS_TIME_DLY_HMSM_EN       1u   /*     Include code for OSTimeDlyHMSM()                         */
#define OS_TIME_DLY_RESUME_EN     1u   /*     Include code for OSTimeDlyResume()                       */
#define OS_TIME_GET_SET_EN        1u   /*     Include code for OSTimeGet() and OSTimeSet()             */
#define OS_TIME_TICK_HOOK_EN      1u   /*     Include code for OSTimeTickHook()                        */

                                       /* --------------------- TIMER MANAGEMENT --------------------- */
#define OS_TMR_EN                 0u   /* Enable (1) or Disable (0) code generation for TIMERS         */
#define OS_TMR_CFG_MAX           16u   /*     Maximum number of timers                                 */
#define OS_TMR_CFG_NAME_EN        1u   /*     Determine timer names                                    */
#define OS_TMR_CFG_WHEEL_SIZE     8u   /*     Size of timer wheel (#Spokes)                            */
#define OS_TMR_CFG_TICKS_PER_SEC 10u   /*     Rate at which timer management task runs (Hz)            */

因为之前我们有一个lwip_timer的变量，代表了网络系统的时钟心跳，使用的是定时器6，这时候定时器6被操作系统占用了，我们就设置一个新的定时器7作为网络心跳定时器，如下

//定时器6中断服务程序
void TIM6_IRQHandler(void)
{
    OSIntEnter();        //进入中断
    if (TIM_GetITStatus(TIM6, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
    {
        TIM_ClearITPendingBit(TIM6, TIM_IT_Update  );  //清除TIMx的中断待处理位:TIM 中断源
        OSTimeTick();       //调用ucos的时钟服务程序               

    }
    OSIntExit();        //触发任务切换软中断
}

//基本定时器6中断初始化
//这里时钟选择为APB1的2倍，而APB1为36M
//arr：自动重装值。
//psc：时钟预分频数
//这里使用的是定时器3!
void TIM6_Int_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE); //时钟使能

    TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值     计数到5000为500ms
    TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  10Khz的计数频率
    TIM_TimeBaseStructure.TIM_ClockDivision = ; //设置时钟分割:TDTS = Tck_tim
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
    TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig( TIM6,TIM_IT_Update|TIM_IT_Trigger,ENABLE);//使能定时器6更新触发中断

    TIM_Cmd(TIM6, ENABLE);  //使能TIMx外设

      NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;  //TIM3中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ;  //先占优先级0级
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = ;  //从优先级3级
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
    NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
}

//基本定时器7中断初始化
//这里时钟选择为APB1的2倍，而APB1为36M
//arr：自动重装值。
//psc：时钟预分频数
//这里使用的是定时器7!
void TIM7_Int_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE); //时钟使能

    TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值     计数到5000为500ms
    TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  10Khz的计数频率
    TIM_TimeBaseStructure.TIM_ClockDivision = ; //设置时钟分割:TDTS = Tck_tim
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
    TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig( TIM7,TIM_IT_Update|TIM_IT_Trigger,ENABLE);//使能定时器6更新触发中断

    TIM_Cmd(TIM7, ENABLE);  //使能TIMx外设

      NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;  //TIM3中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ;  //先占优先级0级
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = ;  //从优先级3级
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
    NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
}

u32 lwip_timer=;//lwip 计时器，每10ms增加1.

//定时器7中断服务程序
void TIM7_IRQHandler(void)
{
    OSIntEnter();        //进入中断
    if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
    {
        TIM_ClearITPendingBit(TIM7, TIM_IT_Update  );  //清除TIMx的中断待处理位:TIM 中断源
        lwip_timer++;//lwip计时器增加1
    }
    OSIntExit();        //触发任务切换软中断
}

到这里基本上就可以跑系统了（系统具体移植参见之前的文章）

接下来就是创建任务

void start_task(void *pdata)
{
    OS_CPU_SR cpu_sr=;
    pdata = pdata;
    OSStatInit();                    //初始化统计任务.这里会延时1秒钟左右
     OS_ENTER_CRITICAL();            //进入临界区(无法被中断打断)
     OSTaskCreate(led1_task,(void *),(OS_STK*)&LED1_TASK_STK[LED1_STK_SIZE-],LED1_TASK_PRIO);
     OSTaskCreate(led2_task,(void *),(OS_STK*)&LED2_TASK_STK[LED2_STK_SIZE-],LED2_TASK_PRIO);
    OSTaskCreate(lwip_task,(void *),(OS_STK*)&LWIP_TASK_STK[LWIP_STK_SIZE-],LWIP_TASK_PRIO);
    OSTaskSuspend(START_TASK_PRIO);    //挂起起始任务.
    OS_EXIT_CRITICAL();                //退出临界区(可以被中断打断)
}

我们将lwip创建成为了一个单独的任务，该任务的运行代码如下

//创建任务堆栈空间
OS_STK LWIP_TASK_STK[LWIP_STK_SIZE];

#define CLOCKTICKS_PER_MS 10    //定义时钟节拍

static ip_addr_t ipaddr, netmask, gw;     //定义IP地址
struct netif enc28j60_netif;              //定义网络接口
u32_t input_time;
u32_t last_arp_time;
u32_t last_tcp_time;
u32_t last_ipreass_time;

u32_t last_dhcp_fine_time;
u32_t last_dhcp_coarse_time;
u32 dhcp_ip=;

//LWIP查询
void LWIP_Polling(void)
{
    if(timer_expired(&input_time,)) //接收包，周期处理函数
    {
        ethernetif_input(&enc28j60_netif);
    }
    if(timer_expired(&last_tcp_time,TCP_TMR_INTERVAL/CLOCKTICKS_PER_MS))//TCP处理定时器处理函数
    {
        tcp_tmr();
    }
    if(timer_expired(&last_arp_time,ARP_TMR_INTERVAL/CLOCKTICKS_PER_MS))//ARP处理定时器
    {
        etharp_tmr();
    }
    if(timer_expired(&last_ipreass_time,IP_TMR_INTERVAL/CLOCKTICKS_PER_MS))//IP重新组装定时器
    {
        ip_reass_tmr();
    }
}

void lwip_task(void *pdata)
{
    u8 t_client_cnt = ;
    IP4_ADDR(&ipaddr, , , , );          //设置本地ip地址
    IP4_ADDR(&gw, , , , );            //网关
    IP4_ADDR(&netmask, , , , );        //子网掩码
    //初始化LWIP定时器
    init_lwip_timer();
    //初始化LWIP协议栈,执行检查用户所有可配置的值，初始化所有的模块
    lwip_init();
    //添加网络接口
    while((netif_add(&enc28j60_netif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &ethernet_input)==NULL))
    {
        LCD_ShowString(,,,,(u8*)"ENC28J60 Init Failed             ",LCD_BLACK);
        OSTimeDly();
        LCD_ShowString(,,,,(u8*)"                                 ",LCD_BLACK);
        OSTimeDly();
    }
    LCD_ShowString(,,,,(u8*)"ENC28J60 Init OK                     ",LCD_BLACK);
    //注册默认的网络接口
    netif_set_default(&enc28j60_netif);
    //建立网络接口用于处理通信
    netif_set_up(&enc28j60_netif); 

    Tcp_Client_Init();//初始化tcp客户端

    LCD_ShowString(,,,,(u8*)"TCP CLIENT INIT                      ",LCD_BLACK);
    LCD_ShowString(,,,,(u8*)"TCP CLIENT Disconnect                ",LCD_BLACK);
    LCD_ShowString(,,,,(u8*)"RX:                                  ",LCD_BLACK);
    LCD_ShowString(,,,,(u8*)"TX:                                  ",LCD_BLACK);

    while()
    {
        OSTimeDly();//注意这个延时,和定时器7初始化的时间必须一致,CLOCKTICKS_PER_MS一致
        LWIP_Polling();
        if((lwip_tcp_client_flag&LWIP_CONNECTED)==LWIP_CONNECTED)
        {
            LCD_ShowString(,,,,(u8*)"TCP CLIENT Connect                     ",LCD_BLACK);
            if(keyValue == KEY_RIGHT)
            {
                t_client_cnt++;
                sprintf((char*)lwip_client_buf,"tcp_client send %d\r\n",t_client_cnt);
                LCD_ShowString(,,,,(u8*)lwip_client_buf,LCD_BLACK);//显示当前发送数据
                lwip_tcp_client_flag |= LWIP_SEND_DATA;            //标记有数据需要发送
                keyValue = ;
            }
        }
        else
        {
//            Tcp_Client_Connect_Remotehost();//没有连接上，此时处于TCP客户端模式，则尝试重新连接
        }

        if((lwip_tcp_client_flag&LWIP_NEW_DATA)==LWIP_NEW_DATA)
        {
            LCD_ShowString(,,,,(u8*)lwip_client_buf,LCD_BLACK);
            lwip_tcp_client_flag &=~LWIP_NEW_DATA;        //清除接受数据的标志
        }
    }
}

和之前的raw模式不带系统差不多，这一章只是一个引导，不想这么玩的可以看下一章直接使用netconn，好了到此为止

哦对了，代码链接在下面

http://download.csdn.net/detail/dengrengong/8599061