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/*
* FreeRTOS V202107.00
* Copyright (C) 2021 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!
*/
/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
/* BSP includes. */
#include "board.h"
/* Demo interface include. */
#include "led_demo.h"
/**
* Represents which LEDs are on or off. pdTRUE is on.
*/
typedef struct LedState
{
BaseType_t xRed;
BaseType_t xGreen;
BaseType_t xBlue;
} LedState_t;
/* The following needs to be placed in the shared memory as it is accessed in
* the button pressed IRQ handler which is unprivileged. */
static LedState_t xLedState __attribute__( ( section( "user_irq_shared_memory" ) ) );
/*-----------------------------------------------------------*/
/**
* @brief Turn on RGB Led according to the xLedState.
*/
static void prvTurnOnRgbLed( void );
/**
* @brief Turn off RGB Led.
*/
static void prvTurnOffRgbLed( void );
/*-----------------------------------------------------------*/
static void prvTurnOnRgbLed( void )
{
/* Setting the GPIO pin activates the color in RGB LED. */
if( xLedState.xRed == pdTRUE )
{
GPIO_PortClear( GPIO, BOARD_LED_RED_GPIO_PORT, 1u << BOARD_LED_RED_GPIO_PIN );
}
if( xLedState.xGreen == pdTRUE )
{
GPIO_PortClear( GPIO, BOARD_LED_GREEN_GPIO_PORT, 1u << BOARD_LED_GREEN_GPIO_PIN );
}
if( xLedState.xBlue == pdTRUE )
{
GPIO_PortClear( GPIO, BOARD_LED_BLUE_GPIO_PORT, 1u << BOARD_LED_BLUE_GPIO_PIN );
}
}
/*-----------------------------------------------------------*/
static void prvTurnOffRgbLed( void )
{
/* Setting the pins high turns off the LED. */
GPIO_PortSet( GPIO, BOARD_LED_RED_GPIO_PORT, 1u << BOARD_LED_RED_GPIO_PIN );
GPIO_PortSet( GPIO, BOARD_LED_GREEN_GPIO_PORT, 1u << BOARD_LED_GREEN_GPIO_PIN );
GPIO_PortSet( GPIO, BOARD_LED_BLUE_GPIO_PORT, 1u << BOARD_LED_BLUE_GPIO_PIN );
}
/*-----------------------------------------------------------*/
void vLedDemoTask( void * pvParams )
{
/* Set the initial LED state. */
xLedState.xRed = pdTRUE;
xLedState.xGreen = pdTRUE;
xLedState.xBlue = pdFALSE;
/* Silence compiler warnings about unused variables. */
( void ) pvParams;
for( ;; )
{
prvTurnOnRgbLed();
vTaskDelay( pdMS_TO_TICKS( 1000 ) );
prvTurnOffRgbLed();
vTaskDelay( pdMS_TO_TICKS( 1000 ) );
}
}
/*-----------------------------------------------------------*/
void vButtonPressedIRQHandler( uint32_t ulData )
{
BaseType_t xPreviousRed;
/* Data is not used. */
( void ) ulData;
/* Shift to the next color. */
xPreviousRed = xLedState.xRed;
xLedState.xRed = xLedState.xGreen;
xLedState.xGreen = xLedState.xBlue;
xLedState.xBlue = xPreviousRed;
}
/*-----------------------------------------------------------*/
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