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diff --git a/examples/imx7_colibri_m4/demo_apps/sema4_demo/main.c b/examples/imx7_colibri_m4/demo_apps/sema4_demo/main.c
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+/*
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * o Redistributions of source code must retain the above copyright notice, this list
+ *   of conditions and the following disclaimer.
+ *
+ * o 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.
+ *
+ * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ */
+
+///////////////////////////////////////////////////////////////////////////////
+//  Includes
+///////////////////////////////////////////////////////////////////////////////
+#include "FreeRTOS.h"
+#include "task.h"
+#include "board.h"
+#include "debug_console_imx.h"
+#include "sema4_mutex.h"
+
+#define SEMA4_DEMO_GATE        (3)
+
+////////////////////////////////////////////////////////////////////////////////
+// Code
+////////////////////////////////////////////////////////////////////////////////
+static void Sema4Test()
+{
+    SEMA4_Mutex_Lock(SEMA4_DEMO_GATE);
+    PRINTF("\n\r...SEMA4 mutex lock successfully!\n\r");
+    SEMA4_Mutex_Unlock(SEMA4_DEMO_GATE);
+}
+
+/*!
+ * @brief A basic user-defined task
+ */
+void Sema4Task(void *pvParameters)
+{
+    uint8_t receiveBuff;
+
+    // Print the initial banner
+    PRINTF("================== SEMA4 demo ==================\n\r");
+
+    while(1)
+    {
+        // Main routine that triggers a SEMA4 lock
+        PRINTF("Enter command:\n\r");
+        PRINTF("----- 'm' to manually trigger a SEMA4 lock\n\r");
+        PRINTF("----- 'a' to automatically trigger SEMA4 lock every 5 seconds\n\r");
+
+        // First, get character
+        receiveBuff = GETCHAR();
+        // Now echo the received character
+        PUTCHAR(receiveBuff);
+
+        if (receiveBuff == 'm')
+        {
+            Sema4Test();
+        }
+        else if (receiveBuff == 'a')
+        {
+            while (true)
+            {
+                Sema4Test();
+                PRINTF("Wait for 5 seconds......\n\r");
+                vTaskDelay(5 * configTICK_RATE_HZ);
+            }
+        }
+    }
+}
+
+/*!
+ * @brief Main function
+ */
+int main(void)
+{
+    // Initialize demo application pins setting and clock setting.
+    hardware_init();
+
+    // Initialize SEMA4 mutex gate and reset
+    SEMA4_Mutex_Init(SEMA4_DEMO_GATE, true);
+
+    // Create a demo task which will print Hello world and echo user's input.
+    xTaskCreate(Sema4Task, "SEMA4 Task", configMINIMAL_STACK_SIZE,
+                NULL, tskIDLE_PRIORITY+1, NULL);
+
+    // Start FreeRTOS scheduler.
+    vTaskStartScheduler();
+
+    // Should never reach this point.
+    while (true);
+}
+
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/