first commit for chrg

2025-08-16 22:58:22 +08:00
commit 52a3ed5862
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+ /*
+  * FreeModbus Libary: RT-Thread Port
+  * Copyright (C) 2013 Armink <armink.ztl@gmail.com>
+  *
+  * This library is free software; you can redistribute it and/or
+  * modify it under the terms of the GNU Lesser General Public
+  * License as published by the Free Software Foundation; either
+  * version 2.1 of the License, or (at your option) any later version.
+  *
+  * This library is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  * Lesser General Public License for more details.
+  *
+  * You should have received a copy of the GNU Lesser General Public
+  * License along with this library; if not, write to the Free Software
+  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+  *
+  * File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
+  */
+
+/* ----------------------- System includes --------------------------------*/
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "port.h"
+/* ----------------------- Variables ----------------------------------------*/
+static struct rt_semaphore lock;
+static int is_inited = 0;
+/* ----------------------- Start implementation -----------------------------*/
+void EnterCriticalSection(void)
+{
+    rt_err_t err;
+    if(!is_inited)
+    {
+        err = rt_sem_init(&lock, "fmb_lock", 1, RT_IPC_FLAG_PRIO);
+        if(err != RT_EOK)
+        {
+            rt_kprintf("Freemodbus Critical init failed!\n");
+        }
+        is_inited = 1;
+    }
+    rt_sem_take(&lock, RT_WAITING_FOREVER);
+}
+
+void ExitCriticalSection(void)
+{
+    rt_sem_release(&lock);
+}
+