/*
 * FreeRTOS Kernel V10.4.1
 * 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!
 */


/*
 * Creates all the demo application tasks, then starts the scheduler.  The WEB
 * documentation provides more details of the standard demo application tasks.
 * In addition to the standard demo tasks, the following tasks and tests are
 * defined and/or created within this file:
 *
 * "OLED" task - the OLED task is a 'gatekeeper' task.  It is the only task that
 * is permitted to access the display directly.  Other tasks wishing to write a
 * message to the OLED send the message on a queue to the OLED task instead of
 * accessing the OLED themselves.  The OLED task just blocks on the queue waiting
 * for messages - waking and displaying the messages as they arrive.
 *
 * "Check" hook -  This only executes every five seconds from the tick hook.
 * Its main function is to check that all the standard demo tasks are still
 * operational.  Should any unexpected behaviour within a demo task be discovered
 * the tick hook will write an error to the OLED (via the OLED task).  If all the
 * demo tasks are executing with their expected behaviour then the check task
 * writes PASS to the OLED (again via the OLED task), as described above.
 *
 * Use the following command to start running the application in QEMU, pausing
 * to wait for a debugger connection:
 * "qemu-system-arm -machine lm3s6965evb -s -S -kernel [pat_to]\RTOSDemo.elf"
 *
 * To enable FreeRTOS+Trace:
 * 	1) Add #include "trcRecorder.h" to the bottom of FreeRTOSConfig.h.
 * 	2) Call vTraceEnable( TRC_START ); at the top of main.
 * 	3) Ensure the "FreeRTOS+Trace Recorder" folder in the Project Explorer
 * 	   window is not excluded from the build.
 *
 * To retrieve the trace files:
 *	1) Use the Memory windows in the Debug perspective to dump RAM from the
 *	   RecorderData variable.
 */

/*************************************************************************
 * Please ensure to read http://www.freertos.org/portlm3sx965.html
 * which provides information on configuring and running this demo for the
 * various Luminary Micro EKs.
 *************************************************************************/

/* Standard includes. */
#include <stdio.h>
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"

/* Hardware library includes. */
#include "hw_memmap.h"
#include "hw_types.h"
#include "hw_sysctl.h"
#include "hw_uart.h"
#include "sysctl.h"
#include "gpio.h"
#include "grlib.h"
#include "osram128x64x4.h"
#include "uart.h"

/* Demo app includes. */
#include "death.h"
#include "blocktim.h"
#include "semtest.h"
#include "bitmap.h"
#include "QPeek.h"
#include "recmutex.h"
#include "QueueSet.h"
#include "EventGroupsDemo.h"
#include "MessageBufferDemo.h"
#include "StreamBufferDemo.h"

/*-----------------------------------------------------------*/

/* The time between cycles of the 'check' functionality (defined within the
tick hook. */
#define mainCHECK_DELAY						( ( TickType_t ) 5000 / portTICK_PERIOD_MS )

/* Task stack sizes. */
#define mainOLED_TASK_STACK_SIZE			( configMINIMAL_STACK_SIZE + 40 )
#define mainMESSAGE_BUFFER_TASKS_STACK_SIZE	( 100 )

/* Task priorities. */
#define mainCHECK_TASK_PRIORITY				( tskIDLE_PRIORITY + 3 )
#define mainSEM_TEST_PRIORITY				( tskIDLE_PRIORITY + 1 )
#define mainCREATOR_TASK_PRIORITY           ( tskIDLE_PRIORITY + 3 )
#define mainGEN_QUEUE_TASK_PRIORITY			( tskIDLE_PRIORITY )

/* The maximum number of message that can be waiting for display at any one
time. */
#define mainOLED_QUEUE_SIZE					( 3 )

/* Dimensions the buffer into which the jitter time is written. */
#define mainMAX_MSG_LEN						25

/* The period of the system clock in nano seconds.  This is used to calculate
the jitter time in nano seconds. */
#define mainNS_PER_CLOCK					( ( uint32_t ) ( ( 1.0 / ( double ) configCPU_CLOCK_HZ ) * 1000000000.0 ) )

/* Constants used when writing strings to the display. */
#define mainCHARACTER_HEIGHT				( 9 )
#define mainMAX_ROWS_128					( mainCHARACTER_HEIGHT * 14 )
#define mainMAX_ROWS_96						( mainCHARACTER_HEIGHT * 10 )
#define mainMAX_ROWS_64						( mainCHARACTER_HEIGHT * 7 )
#define mainFULL_SCALE						( 15 )
#define ulSSI_FREQUENCY						( 3500000UL )

/*-----------------------------------------------------------*/

/*
 * The display is written two by more than one task so is controlled by a
 * 'gatekeeper' task.  This is the only task that is actually permitted to
 * access the display directly.  Other tasks wanting to display a message send
 * the message to the gatekeeper.
 */
static void prvOLEDTask( void *pvParameters );

/*
 * Configure the hardware for the demo.
 */
static void prvSetupHardware( void );

/*
 * Configures the high frequency timers - those used to measure the timing
 * jitter while the real time kernel is executing.
 */
extern void vSetupHighFrequencyTimer( void );

/*
 * Hook functions that can get called by the kernel.
 */
void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
void vApplicationTickHook( void );

/*
 * Basic polling UART write function.
 */
static void prvPrintString( const char * pcString );

/*-----------------------------------------------------------*/

/* The queue used to send messages to the OLED task. */
static QueueHandle_t xOLEDQueue;

/* The welcome text. */
const char * const pcWelcomeMessage = "   www.FreeRTOS.org";

/*-----------------------------------------------------------*/

/*************************************************************************
 * Please ensure to read http://www.freertos.org/portlm3sx965.html
 * which provides information on configuring and running this demo for the
 * various Luminary Micro EKs.
 *************************************************************************/
int main( void )
{
	/* Initialise the trace recorder.  Use of the trace recorder is optional.
	See http://www.FreeRTOS.org/trace for more information and the comments at
	the top of this file regarding enabling trace in this demo.
	vTraceEnable( TRC_START ); */

	prvSetupHardware();

	/* Create the queue used by the OLED task.  Messages for display on the OLED
	are received via this queue. */
	xOLEDQueue = xQueueCreate( mainOLED_QUEUE_SIZE, sizeof( char * ) );

	/* Start the standard demo tasks. */
	vStartRecursiveMutexTasks();
	vCreateBlockTimeTasks();
	vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
	vStartQueuePeekTasks();
	vStartQueueSetTasks();
	vStartEventGroupTasks();
	vStartMessageBufferTasks( mainMESSAGE_BUFFER_TASKS_STACK_SIZE );
	vStartStreamBufferTasks();

	/* Start the tasks defined within this file/specific to this demo. */
	xTaskCreate( prvOLEDTask, "OLED", mainOLED_TASK_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );

	/* The suicide tasks must be created last as they need to know how many
	tasks were running prior to their creation in order to ascertain whether
	or not the correct/expected number of tasks are running at any given time. */
	vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY );

	/* Uncomment the following line to configure the high frequency interrupt
	used to measure the interrupt jitter time.
	vSetupHighFrequencyTimer(); */

	/* Start the scheduler. */
	vTaskStartScheduler();

	/* Will only get here if there was insufficient memory to create the idle
	task. */
	for( ;; );
}
/*-----------------------------------------------------------*/

void prvSetupHardware( void )
{
    /* If running on Rev A2 silicon, turn the LDO voltage up to 2.75V.  This is
    a workaround to allow the PLL to operate reliably. */
    if( DEVICE_IS_REVA2 )
    {
        SysCtlLDOSet( SYSCTL_LDO_2_75V );
    }

	/* Set the clocking to run from the PLL at 50 MHz */
	SysCtlClockSet( SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_8MHZ );

	/* Initialise the UART - QEMU usage does not seem to require this
	initialisation. */
	SysCtlPeripheralEnable( SYSCTL_PERIPH_UART0 );
	UARTEnable( UART0_BASE );
}
/*-----------------------------------------------------------*/

void vApplicationTickHook( void )
{
static const char * pcMessage = "PASS";
static uint32_t ulTicksSinceLastDisplay = 0;
BaseType_t xHigherPriorityTaskWoken = pdFALSE;

	/* Called from every tick interrupt.  Have enough ticks passed to make it
	time to perform our health status check again? */
	ulTicksSinceLastDisplay++;
	if( ulTicksSinceLastDisplay >= mainCHECK_DELAY )
	{
		ulTicksSinceLastDisplay = 0;

		/* Has an error been found in any task? */
		if( xAreStreamBufferTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN STRM";
		}
		else if( xAreMessageBufferTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN MSG";
		}
	    else if( xIsCreateTaskStillRunning() != pdTRUE )
	    {
	        pcMessage = "ERROR IN CREATE";
	    }
		else if( xAreBlockTimeTestTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN BLOCK TIME";
		}
		else if( xAreSemaphoreTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN SEMAPHORE";
		}
		else if( xAreQueuePeekTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN PEEK Q";
		}
		else if( xAreRecursiveMutexTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN REC MUTEX";
		}
		else if( xAreQueueSetTasksStillRunning() != pdPASS )
		{
			pcMessage = "ERROR IN Q SET";
		}
		else if( xAreEventGroupTasksStillRunning() != pdTRUE )
		{
			pcMessage = "ERROR IN EVNT GRP";
		}

		/* Send the message to the OLED gatekeeper for display. */
		xHigherPriorityTaskWoken = pdFALSE;
		xQueueSendFromISR( xOLEDQueue, &pcMessage, &xHigherPriorityTaskWoken );
	}

	/* Write to a queue that is in use as part of the queue set demo to
	demonstrate using queue sets from an ISR. */
	vQueueSetAccessQueueSetFromISR();

	/* Call the event group ISR tests. */
	vPeriodicEventGroupsProcessing();

	/* Exercise stream buffers from interrupts. */
	vPeriodicStreamBufferProcessing();
}
/*-----------------------------------------------------------*/

static void prvPrintString( const char * pcString )
{
	while( *pcString != 0x00 )
	{
		UARTCharPut( UART0_BASE, *pcString );
		pcString++;
	}
}
/*-----------------------------------------------------------*/

void prvOLEDTask( void *pvParameters )
{
const char *pcMessage;
uint32_t ulY, ulMaxY;
static char cMessage[ mainMAX_MSG_LEN ];
const unsigned char *pucImage;

/* Functions to access the OLED.  The one used depends on the dev kit
being used. */
void ( *vOLEDInit )( uint32_t ) = NULL;
void ( *vOLEDStringDraw )( const char *, uint32_t, uint32_t, unsigned char ) = NULL;
void ( *vOLEDImageDraw )( const unsigned char *, uint32_t, uint32_t, uint32_t, uint32_t ) = NULL;
void ( *vOLEDClear )( void ) = NULL;

	/* Prevent warnings about unused parameters. */
	( void ) pvParameters;

	/* Map the OLED access functions to the driver functions that are appropriate
	for the evaluation kit being used. */
	configASSERT( ( HWREG( SYSCTL_DID1 ) & SYSCTL_DID1_PRTNO_MASK ) == SYSCTL_DID1_PRTNO_6965 );
	vOLEDInit = OSRAM128x64x4Init;
	vOLEDStringDraw = OSRAM128x64x4StringDraw;
	vOLEDImageDraw = OSRAM128x64x4ImageDraw;
	vOLEDClear = OSRAM128x64x4Clear;
	ulMaxY = mainMAX_ROWS_64;
	pucImage = pucBasicBitmap;
	ulY = ulMaxY;

	/* Initialise the OLED and display a startup message. */
	vOLEDInit( ulSSI_FREQUENCY );
	vOLEDStringDraw( "POWERED BY FreeRTOS", 0, 0, mainFULL_SCALE );
	vOLEDImageDraw( pucImage, 0, mainCHARACTER_HEIGHT + 1, bmpBITMAP_WIDTH, bmpBITMAP_HEIGHT );

	for( ;; )
	{
		/* Wait for a message to arrive that requires displaying. */
		xQueueReceive( xOLEDQueue, &pcMessage, portMAX_DELAY );

		/* Write the message on the next available row. */
		ulY += mainCHARACTER_HEIGHT;
		if( ulY >= ulMaxY )
		{
			ulY = mainCHARACTER_HEIGHT;
			vOLEDClear();
			vOLEDStringDraw( pcWelcomeMessage, 0, 0, mainFULL_SCALE );
		}

		/* Display the message along with the maximum jitter time from the
		high priority time test. */
		sprintf( cMessage, "%s %u", pcMessage, ( unsigned int ) xTaskGetTickCount() );
		vOLEDStringDraw( cMessage, 0, ulY, mainFULL_SCALE );
		prvPrintString( cMessage );
		prvPrintString( "\r\n" );
	}
}
/*-----------------------------------------------------------*/

volatile char *pcOverflowedTask = NULL; /* Prevent task name being optimised away. */
void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
{
	( void ) pxTask;
	pcOverflowedTask = pcTaskName;
	vAssertCalled( __FILE__, __LINE__ );
	for( ;; );
}
/*-----------------------------------------------------------*/

void vAssertCalled( const char *pcFile, uint32_t ulLine )
{
volatile uint32_t ulSetTo1InDebuggerToExit = 0;

	taskENTER_CRITICAL();
	{
		while( ulSetTo1InDebuggerToExit == 0 )
		{
			/* Nothing to do here.  Set the loop variable to a non zero value in
			the debugger to step out of this function to the point that caused
			the assertion. */
			( void ) pcFile;
			( void ) ulLine;
		}
	}
	taskEXIT_CRITICAL();
}

/* configUSE_STATIC_ALLOCATION is set to 1, so the application must provide an
implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
used by 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;
}
/*-----------------------------------------------------------*/

/* configUSE_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
application must provide an implementation of vApplicationGetTimerTaskMemory()
to provide the memory that is used by the Timer service 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 Timer
	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;
}
/*-----------------------------------------------------------*/

char * _sbrk_r (struct _reent *r, int incr)
{
	/* Just to keep the linker quiet. */
	( void ) r;
	( void ) incr;

	/* Check this function is never called by forcing an assert() if it is. */
	configASSERT( incr == -1 );

	return NULL;
}