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The line 'Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.'
used to have two spaces between the first and second sentences.
This would cause the header check to fail due to the copyright regex located
ab999f9624/.github/scripts/core_checker.py (L396)
96 lines
3.8 KiB
C
96 lines
3.8 KiB
C
/*
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* FreeRTOS V202212.00
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/*
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* This file defines the button push task and ISR as described at the top of
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* main.c. The ISR is called from a wrapper function defined in ButtonISR.s26.
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*/
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/* Kernel includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "semphr.h"
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/* The LED output used by the button push task. */
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#define butLED1 P7_bit.no7
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/* A short delay used for button debouncing. */
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#define butDEBOUNCE_DELAY ( 200 / portTICK_PERIOD_MS )
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/* The semaphore used to synchronise the button push task with the interrupt. */
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static SemaphoreHandle_t xButtonSemaphore;
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/*
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* The definition of the button task itself. See the comments at the top of
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* main.c.
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*/
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void vButtonTask( void *pvParameters )
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{
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/* Ensure the semaphore is created before it gets used. */
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vSemaphoreCreateBinary( xButtonSemaphore );
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for( ;; )
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{
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/* Block on the semaphore to wait for an interrupt event. The semaphore
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is 'given' from vButtonISRHandler() below. Using portMAX_DELAY as the
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block time will cause the task to block indefinitely provided
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INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h. */
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xSemaphoreTake( xButtonSemaphore, portMAX_DELAY );
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/* The button must have been pushed for this line to be executed.
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Simply toggle the LED. */
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butLED1 = !butLED1;
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/* Wait a short time then clear any pending button pushes as a crude
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method of debouncing the switch. xSemaphoreTake() uses a block time of
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zero this time so it returns immediately rather than waiting for the
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interrupt to occur. */
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vTaskDelay( butDEBOUNCE_DELAY );
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xSemaphoreTake( xButtonSemaphore, 0 );
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}
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}
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/*-----------------------------------------------------------*/
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/*
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* The C portion of the interrupt handler. Interrupts are triggered by pushing
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* the button on the target board. This interrupt can cause a context switch
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* so has an assembly file wrapper defined within ButtonISR.s26.
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*/
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void vButtonISRHandler( void )
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{
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short sHigherPriorityTaskWoken = pdFALSE;
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/* 'Give' the semaphore to unblock the button task. */
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xSemaphoreGiveFromISR( xButtonSemaphore, &sHigherPriorityTaskWoken );
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/* If giving the semaphore unblocked a task, and the unblocked task has a
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priority that is higher than the currently running task, then
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sHigherPriorityTaskWoken will have been set to pdTRUE. Passing a pdTRUE
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value to portYIELD_FROM_ISR() will cause this interrupt to return directly
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to the higher priority unblocked task. */
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portYIELD_FROM_ISR( sHigherPriorityTaskWoken );
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}
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/*-----------------------------------------------------------*/
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