text: /*
   * Copyright (C) 2018 Xilinx, Inc.
   * Amazon FreeRTOS V1.4.6
   * Copyright (C) 2018 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://aws.amazon.com/freertos
   * http://www.FreeRTOS.org
   */
  
  
  #include <stdio.h>
  #include <time.h>
  #include <string.h>
  #include <stdlib.h>
  
  /* FreeRTOS includes. */
  #include "FreeRTOS.h"
  #include "task.h"
  #include "timers.h"
  #include "queue.h"
  #include "semphr.h"
  #include "FreeRTOS_IP.h"
  #include "FreeRTOS_Sockets.h"
  #include "FreeRTOS_DHCP.h"
  
  /* Demo includes */
  #include "aws_demo_runner.h"
  
  /* AWS library includes. */
  #include "aws_system_init.h"
  #include "aws_logging_task.h"
  #include "aws_clientcredential.h"
  #include "platform_config.h"
  #include "aws_dev_mode_key_provisioning.h"
  
  /* Logging Task Defines. */
  #define mainLOGGING_MESSAGE_QUEUE_LENGTH    ( 15 )
  #define mainLOGGING_TASK_STACK_SIZE         ( configMINIMAL_STACK_SIZE * 8 )
  
  /* Unit test defines. */
  #define mainTEST_RUNNER_TASK_STACK_SIZE     ( configMINIMAL_STACK_SIZE * 16 )
  
  /* The name of the devices for xApplicationDNSQueryHook. */
  #define mainDEVICE_NICK_NAME				"XilinxDemo"
  
  
  /* Static arrays for FreeRTOS-Plus-TCP stack initialization for Ethernet network
   * connections are declared below. If you are using an Ethernet connection on your MCU
   * device it is recommended to use the FreeRTOS+TCP stack. The default values are
   * defined in FreeRTOSConfig.h. */
  
  /* Default MAC address configuration.  The application creates a virtual network
   * connection that uses this MAC address by accessing the raw Ethernet data
   * to and from a real network connection on the host PC.  See the
   * configNETWORK_INTERFACE_TO_USE definition for information on how to configure
   * the real network connection to use. */
  const uint8_t ucMACAddress[ 6 ] =
  {
      configMAC_ADDR0,
      configMAC_ADDR1,
      configMAC_ADDR2,
      configMAC_ADDR3,
      configMAC_ADDR4,
      configMAC_ADDR5
  };
  
  /* The default IP and MAC address used by the application.  The address configuration
   * defined here will be used if ipconfigUSE_DHCP is 0, or if ipconfigUSE_DHCP is
   * 1 but a DHCP server could not be contacted.  See the online documentation for
   * more information. */
  static const uint8_t ucIPAddress[ 4 ] =
  {
      configIP_ADDR0,
      configIP_ADDR1,
      configIP_ADDR2,
      configIP_ADDR3
  };
  static const uint8_t ucNetMask[ 4 ] =
  {
      configNET_MASK0,
      configNET_MASK1,
      configNET_MASK2,
      configNET_MASK3
  };
  static const uint8_t ucGatewayAddress[ 4 ] =
  {
      configGATEWAY_ADDR0,
      configGATEWAY_ADDR1,
      configGATEWAY_ADDR2,
      configGATEWAY_ADDR3
  };
  static const uint8_t ucDNSServerAddress[ 4 ] =
  {
      configDNS_SERVER_ADDR0,
      configDNS_SERVER_ADDR1,
      configDNS_SERVER_ADDR2,
      configDNS_SERVER_ADDR3
  };
  
  /**
   * @brief Application task startup hook for applications using Wi-Fi. If you are not
   * using Wi-Fi, then start network dependent applications in the vApplicationIPNetorkEventHook
   * function. If you are not using Wi-Fi, this hook can be disabled by setting
   * configUSE_DAEMON_TASK_STARTUP_HOOK to 0.
   */
  void vApplicationDaemonTaskStartupHook( void );
  
  /**
   * @brief Application IP network event hook called by the FreeRTOS+TCP stack for
   * applications using Ethernet. If you are not using Ethernet and the FreeRTOS+TCP stack,
   * start network dependent applications in vApplicationDaemonTaskStartupHook after the
   * network status is up.
   */
  void vApplicationIPNetworkEventHook( eIPCallbackEvent_t eNetworkEvent );
  
  /*
   * Just seeds the simple pseudo random number generator.
   */
  static void prvSRand( UBaseType_t ulSeed );
  
  /**
   * @brief Initializes the board.
   */
  static void prvMiscInitialization( void );
  
  /* Use by the pseudo random number generator. */
  static UBaseType_t ulNextRand;
  
  /*-----------------------------------------------------------*/
  
  /**
   * @brief Application runtime entry point.
   */
  int main( void )
  {
      /* Perform any hardware initialization that does not require the RTOS to be
       * running.  */
      prvMiscInitialization();
  
      /* Create tasks that are not dependent on the Wi-Fi being initialized. */
      xLoggingTaskInitialize( mainLOGGING_TASK_STACK_SIZE,
                              tskIDLE_PRIORITY,
                              mainLOGGING_MESSAGE_QUEUE_LENGTH );
  
      /* FreeRTOS TCP IP initialization function */
      FreeRTOS_IPInit( ucIPAddress,
                       ucNetMask,
                       ucGatewayAddress,
                       ucDNSServerAddress,
                       ucMACAddress );
      /* Start the scheduler.  Initialization that requires the OS to be running,
       * including the Wi-Fi initialization, is performed in the RTOS daemon task
       * startup hook. */
      vTaskStartScheduler();
      configPRINTF( ("vTaskStartScheduler complete - should not reach here \n\r") );
  
      return 0;
  }
  /*-----------------------------------------------------------*/
  
  UBaseType_t uxRand( void )
  {
  
  const uint32_t ulMultiplier = 0x015a4e35UL, ulIncrement = 1UL;
  
  	/* Utility function to generate a pseudo random number. */
  
  	ulNextRand = ( ulMultiplier * ulNextRand ) + ulIncrement;
  	return( ( int ) ( ulNextRand >> 16UL ) & 0x7fffUL );
  }
  
  /*-----------------------------------------------------------*/
  
  static void prvSRand( UBaseType_t ulSeed )
  {
  	/* Utility function to seed the pseudo random number generator. */
  	ulNextRand = ulSeed;
  }
  
  extern int platform_init_fs();
  static void prvMiscInitialization( void )
  {
  	time_t xTimeNow;
  	/* Perform any hardware initializations, that don't require the RTOS to be
  	 * running, here.
  	 */
  
  	/* Seed the random number generator. */
  	time( &xTimeNow );
  	xil_printf("Seed for randomiser: %lu \n\r", xTimeNow);
  	prvSRand( ( uint32_t ) xTimeNow );
  	xil_printf("Random numbers: %08X %08X %08X %08X\n\r", ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32());
  	vPortInstallFreeRTOSVectorTable();
  	platform_init_fs();
  }
  /*-----------------------------------------------------------*/
  
  void vApplicationDaemonTaskStartupHook( void )
  {
      /* Perform any hardware initialization, that require the RTOS to be
       * running, here. NOTHING to be done here for now */
  }
  /*-----------------------------------------------------------*/
  
  void vApplicationIPNetworkEventHook( eIPCallbackEvent_t eNetworkEvent )
  {
      static BaseType_t xTasksAlreadyCreated = pdFALSE;
  
      /* If the network has just come up...*/
      if( eNetworkEvent == eNetworkUp )
      {
      	configPRINTF( ("Network connection successful.\n\r") );
          if( ( xTasksAlreadyCreated == pdFALSE ) && ( SYSTEM_Init() == pdPASS ) )
          {
          	vDevModeKeyProvisioning();
              DEMO_RUNNER_RunDemos();
              xTasksAlreadyCreated = pdTRUE;
          }
      }
  }
  
  /*-----------------------------------------------------------*/
  
  /**
   * @brief This is to provide memory that is used by the Idle task.
   *
   * If configUSE_STATIC_ALLOCATION is set to 1, then the application must provide an
   * implementation of vApplicationGetIdleTaskMemory() in order to provide memory to
   * the Idle task.
   */
  void vApplicationGetIdleTaskMemory( StaticTask_t ** ppxIdleTaskTCBBuffer,
                                      StackType_t ** ppxIdleTaskStackBuffer,
                                      uint32_t * pulIdleTaskStackSize )
  {
      /* If the buffers to be provided to the Idle task are declared inside this
       * function then they must be declared static - otherwise they will be allocated on
       * the stack and so not exists after this function exits. */
      static StaticTask_t xIdleTaskTCB;
      static StackType_t uxIdleTaskStack[ configMINIMAL_STACK_SIZE ];
  
      /* Pass out a pointer to the StaticTask_t structure in which the Idle
       * task's state will be stored. */
      *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
  
      /* Pass out the array that will be used as the Idle task's stack. */
      *ppxIdleTaskStackBuffer = uxIdleTaskStack;
  
      /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
       * Note that, as the array is necessarily of type StackType_t,
       * configMINIMAL_STACK_SIZE is specified in words, not bytes. */
      *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
  }
  /*-----------------------------------------------------------*/
  
  /**
   * @brief This is to provide the memory that is used by the RTOS daemon/time task.
   *
   * If configUSE_STATIC_ALLOCATION is set to 1, then application must provide an
   * implementation of vApplicationGetTimerTaskMemory() in order to provide memory
   * to the RTOS daemon/time task.
   */
  void vApplicationGetTimerTaskMemory( StaticTask_t ** ppxTimerTaskTCBBuffer,
                                       StackType_t ** ppxTimerTaskStackBuffer,
                                       uint32_t * pulTimerTaskStackSize )
  {
      /* If the buffers to be provided to the Timer task are declared inside this
       * function then they must be declared static - otherwise they will be allocated on
       * the stack and so not exists after this function exits. */
      static StaticTask_t xTimerTaskTCB;
      static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];
  
      /* Pass out a pointer to the StaticTask_t structure in which the Idle
       * task's state will be stored. */
      *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
  
      /* Pass out the array that will be used as the Timer task's stack. */
      *ppxTimerTaskStackBuffer = uxTimerTaskStack;
  
      /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
       * Note that, as the array is necessarily of type StackType_t,
       * configMINIMAL_STACK_SIZE is specified in words, not bytes. */
      *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
  }
  /*-----------------------------------------------------------*/
  
  /**
   * @brief Warn user if pvPortMalloc fails.
   *
   * Called if a call to pvPortMalloc() fails because there is insufficient
   * free memory available in the FreeRTOS heap.  pvPortMalloc() is called
   * internally by FreeRTOS API functions that create tasks, queues, software
   * timers, and semaphores.  The size of the FreeRTOS heap is set by the
   * configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h.
   *
   */
  void vApplicationMallocFailedHook()
  {
      taskDISABLE_INTERRUPTS();
  	configPRINTF( ("In vApplicationMallocFailedHook \n\r") );
      for( ;; );
  }
  /*-----------------------------------------------------------*/
  
  /**
   * @brief Loop forever if stack overflow is detected.
   *
   * If configCHECK_FOR_STACK_OVERFLOW is set to 1,
   * this hook provides a location for applications to
   * define a response to a stack overflow.
   *
   * Use this hook to help identify that a stack overflow
   * has occurred.
   *
   */
  void vApplicationStackOverflowHook( TaskHandle_t xTask,
                                      char * pcTaskName )
  {
      portDISABLE_INTERRUPTS();
  
      /* Loop forever */
      for( ; ; )
      {
      }
  }
  /*-----------------------------------------------------------*/
  
  /**
   * @brief User defined Idle task function.
   *
   * @note Do not make any blocking operations in this function.
   */
  void vApplicationIdleHook( void )
  {
  
      static TickType_t xLastPrint = 0;
      TickType_t xTimeNow;
      const TickType_t xPrintFrequency = pdMS_TO_TICKS( 5000 );
  
      xTimeNow = xTaskGetTickCount();
  
      if( ( xTimeNow - xLastPrint ) > xPrintFrequency )
      {
          configPRINT( "." );
          xLastPrint = xTimeNow;
      }
  }
  
  struct tm *gmtime_r( const time_t *pxTime, struct tm *tmStruct )
  {
  	/* Dummy time functions to keep the file system happy in the absence of
  	target support. */
  	memcpy( tmStruct, gmtime( pxTime ), sizeof( * tmStruct ) );
  	return tmStruct;
  }
  /*-----------------------------------------------------------*/
  
  time_t FreeRTOS_time( time_t *pxTime )
  {
  time_t xReturn;
  
  	xReturn = time( &xReturn );
  
  	if( pxTime != NULL )
  	{
  		*pxTime = xReturn;
  	}
  
  	return xReturn;
  }
  
  /*-----------------------------------------------------------*/
  
  /**
  * @brief User defined application hook to process names returned by the DNS server.
  */
  #if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 )
      BaseType_t xApplicationDNSQueryHook( const char * pcName )
      {
  
      	configPRINTF( ("xApplicationDNSQueryHook \n\r") );
          BaseType_t xReturn;
  
          /* Determine if a name lookup is for this node.  Two names are given
           * to this node: that returned by pcApplicationHostnameHook() and that set
           * by mainDEVICE_NICK_NAME. */
          if( strcmp( pcName, pcApplicationHostnameHook() ) == 0 )
          {
              xReturn = pdPASS;
          }
          else if( strcmp( pcName, mainDEVICE_NICK_NAME ) == 0 )
          {
              xReturn = pdPASS;
          }
          else
          {
              xReturn = pdFAIL;
          }
  
          return xReturn;
      }
  
  #endif /* if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) */
  /*-----------------------------------------------------------*/
  struct timezone;
  struct timeval;
  int _gettimeofday_r(struct _reent * x, struct timeval *y , struct timezone * ptimezone )
  {
  	( void ) x;
  	( void ) y;
  	( void ) ptimezone;
  
  	return 0;
  }
  /*-----------------------------------------------------------*/
  
  /* Called automatically when a reply to an outgoing ping is received. */
  void vApplicationPingReplyHook( ePingReplyStatus_t eStatus, uint16_t usIdentifier )
  {
  static const char *pcSuccess = "Ping reply received - ";
  static const char *pcInvalidChecksum = "Ping reply received with invalid checksum - ";
  static const char *pcInvalidData = "Ping reply received with invalid data - ";
  
  	configPRINTF( ("vApplicationPingReplyHook \n\r") );
  	switch( eStatus )
  	{
  		case eSuccess	:
  			FreeRTOS_printf( ( pcSuccess ) );
  			break;
  
  		case eInvalidChecksum :
  			FreeRTOS_printf( ( pcInvalidChecksum ) );
  			break;
  
  		case eInvalidData :
  			FreeRTOS_printf( ( pcInvalidData ) );
  			break;
  
  		default :
  			/* It is not possible to get here as all enums have their own
  			case. */
  			break;
  	}
  
  	FreeRTOS_debug_printf( ( "identifier %d\r\n", ( int ) usIdentifier ) );
  
  	/* Prevent compiler warnings in case FreeRTOS_debug_printf() is not defined. */
  	( void ) usIdentifier;
  }
  
  /**
   * @brief User defined assertion call. This function is plugged into configASSERT.
   * See FreeRTOSConfig.h to define configASSERT to something different.
   */
  void vAssertCalled(const char * pcFile,
  	uint32_t ulLine)
  {
  
  	const uint32_t ulLongSleep = 1000UL;
  	volatile uint32_t ulBlockVariable = 0UL;
  	volatile char * pcFileName = (volatile char *)pcFile;
  	volatile uint32_t ulLineNumber = ulLine;
  
  	(void)pcFileName;
  	(void)ulLineNumber;
  
  	configPRINTF( ("vAssertCalled %s, %ld\n", pcFile, (long)ulLine) );
  	fflush(stdout);
  
  	/* Setting ulBlockVariable to a non-zero value in the debugger will allow
  	* this function to be exited. */
  	taskDISABLE_INTERRUPTS();
  	{
  		while (ulBlockVariable == 0UL)
  		{
  			vTaskDelay( pdMS_TO_TICKS( ulLongSleep ) );
  		}
  	}
  	taskENABLE_INTERRUPTS();
  }
  /*-----------------------------------------------------------*/
  
  /**
   * @brief User defined application hook need by the FreeRTOS-Plus-TCP library.
   */
  #if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) || ( ipconfigDHCP_REGISTER_HOSTNAME == 1 )
      const char * pcApplicationHostnameHook(void)
      {
  
          /* This function will be called during the DHCP: the machine will be registered
           * with an IP address plus this name. */
          return clientcredentialIOT_THING_NAME;
      }
  
  #endif
  
  