FreeRTOS/Demo/CORTEX_STM32F103_Primer_GCC/ParTest/ParTest.c

/*
 * FreeRTOS Kernel V10.3.0
 * 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!
 */

/*-----------------------------------------------------------
 * Simple parallel port IO routines.
 *-----------------------------------------------------------*/

/* FreeRTOS.org includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "partest.h"

#define partstMAX_OUTPUT_LED	( 2 )
#define partstFIRST_LED			GPIO_Pin_8

static unsigned short usOutputValue = 0;

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

void vParTestInitialise( void )
{
GPIO_InitTypeDef GPIO_InitStructure;

	/* Enable LED GPIO clock. */
	RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );

	/* Configure LED pins as output push-pull. */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 ;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

	GPIO_Init( GPIOB, &GPIO_InitStructure );
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned short usBit;

	vTaskSuspendAll();
	{
		if( uxLED < partstMAX_OUTPUT_LED )
		{
			usBit = partstFIRST_LED << uxLED;

			if( xValue == pdFALSE )
			{
				usBit ^= ( unsigned short ) 0xffff;
				usOutputValue &= usBit;
			}
			else
			{
				usOutputValue |= usBit;
			}

			GPIO_Write( GPIOB, usOutputValue );
		}	
	}
	xTaskResumeAll();
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned short usBit;

	vTaskSuspendAll();
	{
		if( uxLED < partstMAX_OUTPUT_LED )
		{
			usBit = partstFIRST_LED << uxLED;

			if( usOutputValue & usBit )
			{
				usOutputValue &= ~usBit;
			}
			else
			{
				usOutputValue |= usBit;
			}

			GPIO_Write( GPIOB, usOutputValue );
		}
	}
	xTaskResumeAll();
}
/*-----------------------------------------------------------*/