/* | |
FreeRTOS V8.2.2 - Copyright (C) 2015 Real Time Engineers Ltd. | |
All rights reserved | |
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
This file is part of the FreeRTOS distribution. | |
FreeRTOS is free software; you can redistribute it and/or modify it under | |
the terms of the GNU General Public License (version 2) as published by the | |
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. | |
*************************************************************************** | |
>>! NOTE: The modification to the GPL is included to allow you to !<< | |
>>! distribute a combined work that includes FreeRTOS without being !<< | |
>>! obliged to provide the source code for proprietary components !<< | |
>>! outside of the FreeRTOS kernel. !<< | |
*************************************************************************** | |
FreeRTOS 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. Full license text is available on the following | |
link: http://www.freertos.org/a00114.html | |
*************************************************************************** | |
* * | |
* FreeRTOS provides completely free yet professionally developed, * | |
* robust, strictly quality controlled, supported, and cross * | |
* platform software that is more than just the market leader, it * | |
* is the industry's de facto standard. * | |
* * | |
* Help yourself get started quickly while simultaneously helping * | |
* to support the FreeRTOS project by purchasing a FreeRTOS * | |
* tutorial book, reference manual, or both: * | |
* http://www.FreeRTOS.org/Documentation * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
the FAQ page "My application does not run, what could be wrong?". Have you | |
defined configASSERT()? | |
http://www.FreeRTOS.org/support - In return for receiving this top quality | |
embedded software for free we request you assist our global community by | |
participating in the support forum. | |
http://www.FreeRTOS.org/training - Investing in training allows your team to | |
be as productive as possible as early as possible. Now you can receive | |
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers | |
Ltd, and the world's leading authority on the world's leading RTOS. | |
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. | |
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. | |
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High | |
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS | |
licenses offer ticketed support, indemnification and commercial middleware. | |
http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
engineered and independently SIL3 certified version for use in safety and | |
mission critical applications that require provable dependability. | |
1 tab == 4 spaces! | |
*/ | |
/****************************************************************************** | |
* NOTE 1: This project provides two demo applications. A simple blinky style | |
* project, and a more comprehensive test and demo application. The | |
* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting in main.c is used to select | |
* between the two. See the notes on using mainCREATE_SIMPLE_BLINKY_DEMO_ONLY | |
* in main.c. This file implements the simply blinky style version. | |
* | |
* NOTE 2: This file only contains the source code that is specific to the | |
* basic demo. Generic functions, such FreeRTOS hook functions, and functions | |
* required to configure the hardware are defined in main.c. | |
****************************************************************************** | |
* | |
* 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. It sends the value 100 to the queue every 200 milliseconds. | |
* | |
* The Queue Receive Task: | |
* The queue receive task is implemented by the prvQueueReceiveTask() function | |
* in this file. It blocks on the queue to wait for data to arrive from the | |
* queue send task - toggling the LED each time it receives the value 100. The | |
* queue send task writes to the queue every 200ms, so the LED should toggle | |
* every 200ms. | |
*/ | |
/* Kernel includes. */ | |
#include "FreeRTOS.h" | |
#include "task.h" | |
#include "semphr.h" | |
/* Renesas includes. */ | |
#include "rskrx231def.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 ( pdMS_TO_TICKS( 200UL ) ) | |
/* 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 ) | |
/*-----------------------------------------------------------*/ | |
/* | |
* Called by main when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1 in | |
* main.c. | |
*/ | |
void main_blinky( void ); | |
/* | |
* 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( ;; ); | |
} | |
/*-----------------------------------------------------------*/ | |
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 ) | |
{ | |
LED0 = !LED0; | |
ulReceivedValue = 0U; | |
} | |
} | |
} | |
/*-----------------------------------------------------------*/ | |