109 lines
4.5 KiB
C
109 lines
4.5 KiB
C
/************************************************************************************//**
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* \file Demo/ARMCM0_S32K14_S32K118EVB_GCC/Boot/led.c
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* \brief LED driver source file.
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* \ingroup Boot_ARMCM0_S32K14_S32K118EVB_GCC
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2020 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You have received a copy of the GNU General Public License along with OpenBLT. It
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* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
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*
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* \endinternal
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "boot.h" /* bootloader generic header */
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#include "led.h" /* module header */
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#include "device_registers.h" /* device registers */
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/****************************************************************************************
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* Local data declarations
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****************************************************************************************/
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/** \brief Holds the desired LED blink interval time. */
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static blt_int16u ledBlinkIntervalMs;
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/************************************************************************************//**
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** \brief Initializes the LED blink driver.
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** \param interval_ms Specifies the desired LED blink interval time in milliseconds.
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** \return none.
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**
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****************************************************************************************/
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void LedBlinkInit(blt_int16u interval_ms)
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{
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/* LED GPIO pin configuration. PE8 = GPIO, MUX = ALT1. */
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PORTE->PCR[8] = PORT_PCR_MUX(1);
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/* Configure Port E pin 8 GPIO as digital output. */
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PTE->PDDR |= GPIO_PDDR_PDD(1 << 8U);
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/* Turn the LED off on Port E pin 8. */
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PTE->PCOR |= GPIO_PSOR_PTSO(1 << 8U);
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/* store the interval time between LED toggles */
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ledBlinkIntervalMs = interval_ms;
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} /*** end of LedBlinkInit ***/
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/************************************************************************************//**
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** \brief Task function for blinking the LED as a fixed timer interval.
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** \return none.
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**
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****************************************************************************************/
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void LedBlinkTask(void)
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{
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static blt_bool ledOn = BLT_FALSE;
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static blt_int32u nextBlinkEvent = 0;
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/* check for blink event */
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if (TimerGet() >= nextBlinkEvent)
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{
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/* toggle the LED state */
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if (ledOn == BLT_FALSE)
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{
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ledOn = BLT_TRUE;
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/* Turn the LED on. */
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PTE->PSOR |= GPIO_PSOR_PTSO(1 << 8U);
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}
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else
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{
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ledOn = BLT_FALSE;
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/* Turn the LED off. */
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PTE->PCOR |= GPIO_PSOR_PTSO(1 << 8U);
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}
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/* schedule the next blink event */
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nextBlinkEvent = TimerGet() + ledBlinkIntervalMs;
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}
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} /*** end of LedBlinkTask ***/
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/************************************************************************************//**
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** \brief Cleans up the LED blink driver. This is intended to be used upon program
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** exit.
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** \return none.
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**
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****************************************************************************************/
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void LedBlinkExit(void)
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{
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/* Turn the LED off. */
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PTE->PCOR |= GPIO_PSOR_PTSO(1 << 8U);
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} /*** end of LedBlinkExit ***/
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/*********************************** end of led.c **************************************/
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