diff --git a/net/lwip/port/src/sys_arch.c b/net/lwip/port/src/sys_arch.c
index 31b65df7..42f9a2c3 100644
--- a/net/lwip/port/src/sys_arch.c
+++ b/net/lwip/port/src/sys_arch.c
@@ -122,36 +122,36 @@ void sys_sem_set_invalid(sys_sem_t *sem)
 }
 
 /*
-   Èç¹ûtimeout²ÎÊý²»ÎªÁ㣬Ôò·µ»ØֵΪ
-   µÈ´ýÐźÅÁ¿Ëù»¨·ÑµÄºÁÃëÊý¡£Èç¹û
-   ÐźÅÁ¿Î´ÔÚÖ¸¶¨Ê±¼äÄÚ·¢³öÐźţ¬·µ»ØֵΪ
-   SYS_ARCH_TIMEOUT¡£Èç¹ûÏ̲߳»±ØµÈ´ýÐźÅÁ¿
-   ¸Ãº¯Êý·µ»ØÁã¡£ */
+   ���timeout������Ϊ�㣬�򷵻�ֵΪ
+   �ȴ��ź��������ѵĺ����������
+   �ź���δ��ָ��ʱ���ڷ����źţ�����ֵΪ
+   SYS_ARCH_TIMEOUT������̲߳��صȴ��ź���
+   �ú��������㡣 */
 u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout)
 {
     k_tick_t wait_tick = 0;
     k_tick_t start_tick = 0;
 
-    //¿´¿´ÐźÅÁ¿ÊÇ·ñÓÐЧ
+    //�����ź����Ƿ���Ч
     if (sem == SYS_SEM_NULL) {
         return SYS_ARCH_TIMEOUT;
     }
 
-    //Ê×ÏÈ»ñÈ¡¿ªÊ¼µÈ´ýÐźÅÁ¿µÄʱÖÓ½ÚÅÄ
+    //���Ȼ�ȡ��ʼ�ȴ��ź�����ʱ�ӽ���
     start_tick = sys_now();
 
-    //timeout != 0£¬ÐèÒª½«ms»»³ÉϵͳµÄʱÖÓ½ÚÅÄ
+    //timeout != 0����Ҫ��ms����ϵͳ��ʱ�ӽ���
     if (timeout != 0) {
-        //½«msת»»³ÉʱÖÓ½ÚÅÄ
+        //��msת����ʱ�ӽ���
         wait_tick = timeout / (1000 / TOS_CFG_CPU_TICK_PER_SECOND);
         if (wait_tick == 0) {
             wait_tick = 1;
         }
     } else {
-        wait_tick = TOS_TIME_FOREVER;  //Ò»Ö±×èÈû
+        wait_tick = TOS_TIME_FOREVER;  //һֱ����
     }
 
-    //µÈ´ý³É¹¦£¬¼ÆËãµÈ´ýµÄʱ¼ä£¬·ñÔò¾Í±íʾµÈ´ý³¬Ê±
+    //�ȴ��ɹ�������ȴ���ʱ�䣬����ͱ�ʾ�ȴ���ʱ
     if (tos_sem_pend(sem, wait_tick) == K_ERR_NONE) {
         return ((sys_now() - start_tick) * (1000 / TOS_CFG_CPU_TICK_PER_SECOND));
     }
@@ -224,17 +224,20 @@ sys_thread_t sys_thread_new(const char *name, lwip_thread_fn function, void *arg
         return NULL;
     }
 
-    task_stack = tos_mmheap_alloc(stacksize);
+    task_stack = (k_stack_t *)tos_mmheap_alloc(stacksize);
     if (!task_stack) {
         printf("[sys_arch]:memalloc task stack fail!\n");
+        tos_mmheap_free(task);
         return NULL;
     }
 
-    /* ´´½¨MidPriority_TaskÈÎÎñ */
+    /* ����MidPriority_Task���� */
     rc = tos_task_create(task, (char*)name, function, arg,
                             prio, task_stack, stacksize, 20);
     if (rc != K_ERR_NONE) {
         printf("[sys_arch]:create task fail! code: %d \r\n", rc);
+        tos_mmheap_free(task);
+        tos_mmheap_free(task_stack);
         return NULL;
     }
 
@@ -310,25 +313,25 @@ u32_t sys_arch_mbox_fetch(sys_mbox_t *q, void **msg, u32_t timeout)
     k_tick_t wait_tick = 0;
     k_tick_t start_tick = 0;
 
-    if (!msg) { // ¿´¿´´æ´¢ÏûÏ¢µÄµØ·½ÊÇ·ñÓÐЧ
+    if (!msg) { // �����洢��Ϣ�ĵط��Ƿ���Ч
         msg = &dummyptr;
     }
 
-    // Ê×ÏÈ»ñÈ¡¿ªÊ¼µÈ´ýÐźÅÁ¿µÄʱÖÓ½ÚÅÄ
+    // ���Ȼ�ȡ��ʼ�ȴ��ź�����ʱ�ӽ���
     start_tick = sys_now();
 
-    // timeout != 0£¬ÐèÒª½«ms»»³ÉϵͳµÄʱÖÓ½ÚÅÄ
+    // timeout != 0����Ҫ��ms����ϵͳ��ʱ�ӽ���
     if (timeout != 0) {
-        //½«msת»»³ÉʱÖÓ½ÚÅÄ
+        //��msת����ʱ�ӽ���
         wait_tick = timeout / (1000 / TOS_CFG_CPU_TICK_PER_SECOND);
         if (wait_tick == 0) {
             wait_tick = 1;
         }
-    } else { // Ò»Ö±×èÈû
+    } else { // һֱ����
         wait_tick = TOS_TIME_FOREVER;
     }
 
-    // µÈ´ý³É¹¦£¬¼ÆËãµÈ´ýµÄʱ¼ä£¬·ñÔò¾Í±íʾµÈ´ý³¬Ê±
+    // �ȴ��ɹ�������ȴ���ʱ�䣬����ͱ�ʾ�ȴ���ʱ
     if (tos_msg_q_pend(q,&(*msg), wait_tick) == K_ERR_NONE) {
         return ((sys_now() - start_tick) * (1000 / TOS_CFG_CPU_TICK_PER_SECOND));
     }