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diff --git a/FreeRTOS/Demo/AVR_ATMega4809_IAR/main_blinky.c b/FreeRTOS/Demo/AVR_ATMega4809_IAR/main_blinky.c
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+++ b/FreeRTOS/Demo/AVR_ATMega4809_IAR/main_blinky.c
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+/*
+ * FreeRTOS Kernel V10.3.1
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/******************************************************************************
+ *
+ * main_blinky() creates one queue, and two tasks.  It then starts the
+ * scheduler.
+ *
+ * The Queue Send Task:
+ * The queue send task is implemented by the prvQueueSendTask() function in
+ * this file.  prvQueueSendTask() sits in a loop that causes it to repeatedly
+ * block for 200 milliseconds, before sending the value 100 to the queue that
+ * was created within main_blinky().  Once the value is sent, the task loops
+ * back around to block for another 200 milliseconds...and so on.
+ *
+ * The Queue Receive Task:
+ * The queue receive task is implemented by the prvQueueReceiveTask() function
+ * in this file.  prvQueueReceiveTask() sits in a loop where it repeatedly
+ * blocks on attempts to read data from the queue that was created within
+ * main_blinky().  When data is received, the task checks the value of the
+ * data, and if the value equals the expected 100, toggles an LED.  The 'block
+ * time' parameter passed to the queue receive function specifies that the
+ * task should be held in the Blocked state indefinitely to wait for data to
+ * be available on the queue.  The queue receive task will only leave the
+ * Blocked state when the queue send task writes to the queue.  As the queue
+ * send task writes to the queue every 200 milliseconds, the queue receive
+ * task leaves the Blocked state every 200 milliseconds, and therefore toggles
+ * the LED every 200 milliseconds.
+ */
+
+#include <ioavr.h>
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "semphr.h"
+
+/* Priorities at which the tasks are created. */
+#define mainQUEUE_RECEIVE_TASK_PRIORITY     ( tskIDLE_PRIORITY + 2 )
+#define mainQUEUE_SEND_TASK_PRIORITY        ( tskIDLE_PRIORITY + 1 )
+
+/* The rate at which data is sent to the queue.  The 200ms value is converted
+to ticks using the portTICK_PERIOD_MS constant. */
+#define mainQUEUE_SEND_FREQUENCY_MS         ( 200 / portTICK_PERIOD_MS )
+
+/* The number of items the queue can hold.  This is 1 as the receive task
+will remove items as they are added, meaning the send task should always find
+the queue empty. */
+#define mainQUEUE_LENGTH                    ( 1 )
+
+/*-----------------------------------------------------------*/
+
+/*
+ * The tasks as described in the comments at the top of this file.
+ */
+static void prvQueueReceiveTask( void *pvParameters );
+static void prvQueueSendTask( void *pvParameters );
+
+/*-----------------------------------------------------------*/
+
+/* The queue used by both tasks. */
+static QueueHandle_t xQueue = NULL;
+
+void main_blinky( void )
+{
+    /* Create the queue. */
+     xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( uint32_t ) );
+ 
+    if( xQueue != NULL )
+    {
+        /* Start the two tasks as described in the comments at the top of this
+        file. */
+        xTaskCreate( prvQueueReceiveTask,               /* The function that implements the task. */
+                    "Rx",                               /* The text name assigned to the task - for debug only as it is not used by the kernel. */
+                    configMINIMAL_STACK_SIZE,           /* The size of the stack to allocate to the task. */
+                    NULL,                               /* The parameter passed to the task - not used in this case. */
+                    mainQUEUE_RECEIVE_TASK_PRIORITY,    /* The priority assigned to the task. */
+                    NULL );                             /* The task handle is not required, so NULL is passed. */
+
+        xTaskCreate( prvQueueSendTask, "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );
+
+        /* Start the tasks and timer running. */
+        vTaskStartScheduler();
+    }
+
+    /* If all is well, the scheduler will now be running, and the following
+    line will never be reached.  If the following line does execute, then
+    there was either insufficient FreeRTOS heap memory available for the idle
+    and/or timer tasks to be created, or vTaskStartScheduler() was called from
+    User mode.  See the memory management section on the FreeRTOS web site for
+    more details on the FreeRTOS heap http://www.freertos.org/a00111.html.  The
+    mode from which main() is called is set in the C start up code and must be
+    a privileged mode (not user mode). */
+    for( ;; );  
+}
+
+void init_blinky( void )
+{
+    /* Set PF5 as output. */
+    PORTF.DIRSET = PIN5_bm;
+}
+
+static void prvQueueSendTask( void *pvParameters )
+{
+TickType_t xNextWakeTime;
+const unsigned long ulValueToSend = 100UL;
+
+    /* Remove compiler warning about unused parameter. */
+    ( void ) pvParameters;
+
+    /* Initialise xNextWakeTime - this only needs to be done once. */
+    xNextWakeTime = xTaskGetTickCount();
+
+    for( ;; )
+    {
+        /* Place this task in the blocked state until it is time to run again. */
+        vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS );
+
+        /* Send to the queue - causing the queue receive task to unblock and
+        toggle the LED.  0 is used as the block time so the sending operation
+        will not block - it shouldn't need to block as the queue should always
+        be empty at this point in the code. */
+        xQueueSend( xQueue, &ulValueToSend, 0U );
+    }
+}
+/*-----------------------------------------------------------*/
+
+static void prvQueueReceiveTask( void *pvParameters )
+{
+unsigned long ulReceivedValue;
+const unsigned long ulExpectedValue = 100UL;
+
+    /* Remove compiler warning about unused parameter. */
+    ( void ) pvParameters;
+
+    for( ;; )
+    {
+        /* Wait until something arrives in the queue - this task will block
+        indefinitely provided INCLUDE_vTaskSuspend is set to 1 in
+        FreeRTOSConfig.h. */
+        xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY );
+
+        /*  To get here something must have been received from the queue, but
+        is it the expected value?  If it is, toggle the LED. */
+        if( ulReceivedValue == ulExpectedValue )
+        {
+            /* Toggle LED on pin PF5. */
+            PORTF.OUTTGL |= PIN5_bm;
+            ulReceivedValue = 0U;
+        }
+    }
+}
+