757 lines
15 KiB
C
757 lines
15 KiB
C
/*
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Copyright (C) 2014..2016 Marco Veeneman
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file TIVA/gpt_lld.c
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* @brief TM4C123x/TM4C129x GPT subsystem low level driver source.
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*
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* @addtogroup GPT
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* @{
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*/
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#include "hal.h"
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#if HAL_USE_GPT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief GPTD1 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT0 || defined(__DOXYGEN__)
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GPTDriver GPTD1;
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#endif
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/**
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* @brief GPTD2 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT1 || defined(__DOXYGEN__)
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GPTDriver GPTD2;
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#endif
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/**
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* @brief GPTD3 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT2 || defined(__DOXYGEN__)
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GPTDriver GPTD3;
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#endif
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/**
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* @brief GPTD4 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT3 || defined(__DOXYGEN__)
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GPTDriver GPTD4;
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#endif
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/**
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* @brief GPTD5 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT4 || defined(__DOXYGEN__)
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GPTDriver GPTD5;
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#endif
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/**
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* @brief GPTD6 driver identifier.
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*/
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#if TIVA_GPT_USE_GPT5 || defined(__DOXYGEN__)
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GPTDriver GPTD6;
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#endif
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/**
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* @brief GPTD7 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT0 || defined(__DOXYGEN__)
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GPTDriver GPTD7;
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#endif
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/**
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* @brief GPTD8 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT1 || defined(__DOXYGEN__)
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GPTDriver GPTD8;
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#endif
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/**
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* @brief GPTD9 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT2 || defined(__DOXYGEN__)
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GPTDriver GPTD9;
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#endif
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/**
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* @brief GPTD10 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT3 || defined(__DOXYGEN__)
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GPTDriver GPTD10;
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#endif
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/**
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* @brief GPTD11 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT4 || defined(__DOXYGEN__)
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GPTDriver GPTD11;
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#endif
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/**
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* @brief GPTD12 driver identifier.
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*/
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#if TIVA_GPT_USE_WGPT5 || defined(__DOXYGEN__)
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GPTDriver GPTD12;
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#endif
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief Shared IRQ handler.
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*
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* @param[in] gptp pointer to @p GPTDriver object
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*/
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static void gpt_lld_serve_interrupt(GPTDriver *gptp)
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{
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gptp->gpt->ICR = 0xffffffff;
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if (gptp->state == GPT_ONESHOT) {
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gptp->state = GPT_READY;
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gpt_lld_stop_timer(gptp);
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}
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gptp->config->callback(gptp);
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if TIVA_GPT_USE_GPT0
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#if !defined(TIVA_GPT0A_HANDLER)
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#error "TIVA_GPT0A_HANDLER not defined"
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#endif
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/**
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* @brief GPT0 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT0A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD1);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_GPT1
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#if !defined(TIVA_GPT1A_HANDLER)
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#error "TIVA_GPT1A_HANDLER not defined"
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#endif
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/**
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* @brief GPT1 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT1A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD2);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_GPT2
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#if !defined(TIVA_GPT2A_HANDLER)
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#error "TIVA_GPT2A_HANDLER not defined"
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#endif
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/**
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* @brief GPT2 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT2A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD3);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_GPT3
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#if !defined(TIVA_GPT3A_HANDLER)
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#error "TIVA_GPT3A_HANDLER not defined"
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#endif
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/**
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* @brief GPT3 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT3A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD4);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_GPT4
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#if !defined(TIVA_GPT4A_HANDLER)
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#error "TIVA_GPT4A_HANDLER not defined"
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#endif
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/**
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* @brief GPT4 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT4A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD5);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_GPT5
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#if !defined(TIVA_GPT5A_HANDLER)
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#error "TIVA_GPT5A_HANDLER not defined"
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#endif
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/**
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* @brief GPT5 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_GPT5A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD6);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT0
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#if !defined(TIVA_WGPT0A_HANDLER)
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#error "TIVA_WGPT0A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT0 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT0A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD7);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT1
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#if !defined(TIVA_WGPT1A_HANDLER)
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#error "TIVA_WGPT1A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT1 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT1A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD8);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT2
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#if !defined(TIVA_WGPT2A_HANDLER)
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#error "TIVA_WGPT2A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT2 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT2A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD9);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT3
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#if !defined(TIVA_WGPT3A_HANDLER)
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#error "TIVA_WGPT3A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT3 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT3A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD10);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT4
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#if !defined(TIVA_WGPT4A_HANDLER)
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#error "TIVA_WGPT4A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT4 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT4A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD11);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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#if TIVA_GPT_USE_WGPT5
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#if !defined(TIVA_WGPT5A_HANDLER)
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#error "TIVA_WGPT5A_HANDLER not defined"
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#endif
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/**
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* @brief WGPT5 interrupt handler.
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*
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* @isr
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*/
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OSAL_IRQ_HANDLER(TIVA_WGPT5A_HANDLER)
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{
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OSAL_IRQ_PROLOGUE();
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gpt_lld_serve_interrupt(&GPTD12);
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OSAL_IRQ_EPILOGUE();
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}
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#endif
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level GPT driver initialization.
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*
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* @notapi
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*/
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void gpt_lld_init(void)
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{
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/* Driver initialization.*/
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#if TIVA_GPT_USE_GPT0
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GPTD1.gpt = GPT0;
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gptObjectInit(&GPTD1);
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#endif
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#if TIVA_GPT_USE_GPT1
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GPTD2.gpt = GPT1;
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gptObjectInit(&GPTD2);
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#endif
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#if TIVA_GPT_USE_GPT2
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GPTD3.gpt = GPT2;
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gptObjectInit(&GPTD3);
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#endif
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#if TIVA_GPT_USE_GPT3
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GPTD4.gpt = GPT3;
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gptObjectInit(&GPTD4);
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#endif
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#if TIVA_GPT_USE_GPT4
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GPTD5.gpt = GPT4;
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gptObjectInit(&GPTD5);
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#endif
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#if TIVA_GPT_USE_GPT5
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GPTD6.gpt = GPT5;
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gptObjectInit(&GPTD6);
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#endif
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#if TIVA_GPT_USE_WGPT0
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GPTD7.gpt = WGPT0;
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gptObjectInit(&GPTD7);
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#endif
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#if TIVA_GPT_USE_WGPT1
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GPTD8.gpt = WGPT1;
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gptObjectInit(&GPTD8);
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#endif
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#if TIVA_GPT_USE_WGPT2
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GPTD9.gpt = WGPT2;
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gptObjectInit(&GPTD9);
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#endif
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#if TIVA_GPT_USE_WGPT3
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GPTD10.gpt = WGPT3;
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gptObjectInit(&GPTD10);
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#endif
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#if TIVA_GPT_USE_WGPT4
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GPTD11.gpt = WGPT4;
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gptObjectInit(&GPTD11);
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#endif
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#if TIVA_GPT_USE_WGPT5
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GPTD12.gpt = WGPT5;
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gptObjectInit(&GPTD12);
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#endif
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}
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/**
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* @brief Configures and activates the GPT peripheral.
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*
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* @param[in] gptp pointer to the @p GPTDriver object
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*
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* @notapi
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*/
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void gpt_lld_start(GPTDriver *gptp)
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{
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if (gptp->state == GPT_STOP) {
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/* Clock activation.*/
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#if TIVA_GPT_USE_GPT0
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if (&GPTD1 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 0);
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while (!(SYSCTL->PRTIMER & (1 << 0)))
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;
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nvicEnableVector(TIVA_GPT0A_NUMBER, TIVA_GPT_GPT0A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_GPT1
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if (&GPTD2 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 1);
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while (!(SYSCTL->PRTIMER & (1 << 1)))
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;
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nvicEnableVector(TIVA_GPT1A_NUMBER, TIVA_GPT_GPT1A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_GPT2
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if (&GPTD3 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 2);
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while (!(SYSCTL->PRTIMER & (1 << 2)))
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;
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nvicEnableVector(TIVA_GPT2A_NUMBER, TIVA_GPT_GPT2A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_GPT3
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if (&GPTD4 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 3);
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while (!(SYSCTL->PRTIMER & (1 << 3)))
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;
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nvicEnableVector(TIVA_GPT3A_NUMBER, TIVA_GPT_GPT3A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_GPT4
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if (&GPTD5 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 4);
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while (!(SYSCTL->PRTIMER & (1 << 4)))
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;
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nvicEnableVector(TIVA_GPT4A_NUMBER, TIVA_GPT_GPT4A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_GPT5
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if (&GPTD6 == gptp) {
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SYSCTL->RCGCTIMER |= (1 << 5);
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while (!(SYSCTL->PRTIMER & (1 << 5)))
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;
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nvicEnableVector(TIVA_GPT5A_NUMBER, TIVA_GPT_GPT5A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_WGPT0
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if (&GPTD7 == gptp) {
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SYSCTL->RCGCWTIMER |= (1 << 0);
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while (!(SYSCTL->PRWTIMER & (1 << 0)))
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;
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nvicEnableVector(TIVA_WGPT0A_NUMBER, TIVA_GPT_WGPT0A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_WGPT1
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if (&GPTD8 == gptp) {
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SYSCTL->RCGCWTIMER |= (1 << 1);
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while (!(SYSCTL->PRWTIMER & (1 << 1)))
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;
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nvicEnableVector(TIVA_WGPT1A_NUMBER, TIVA_GPT_WGPT1A_IRQ_PRIORITY);
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}
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#endif
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#if TIVA_GPT_USE_WGPT2
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if (&GPTD9 == gptp) {
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SYSCTL->RCGCWTIMER |= (1 << 2);
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while (!(SYSCTL->PRWTIMER & (1 << 2)))
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;
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nvicEnableVector(TIVA_WGPT2A_NUMBER, TIVA_GPT_WGPT2A_IRQ_PRIORITY);
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}
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#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT3
|
|
if (&GPTD10 == gptp) {
|
|
SYSCTL->RCGCWTIMER |= (1 << 3);
|
|
|
|
while (!(SYSCTL->PRWTIMER & (1 << 3)))
|
|
;
|
|
|
|
nvicEnableVector(TIVA_WGPT3A_NUMBER, TIVA_GPT_WGPT3A_IRQ_PRIORITY);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT4
|
|
if (&GPTD11 == gptp) {
|
|
SYSCTL->RCGCWTIMER |= (1 << 4);
|
|
|
|
while (!(SYSCTL->PRWTIMER & (1 << 4)))
|
|
;
|
|
|
|
nvicEnableVector(TIVA_WGPT4A_NUMBER, TIVA_GPT_WGPT4A_IRQ_PRIORITY);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT5
|
|
if (&GPTD12 == gptp) {
|
|
SYSCTL->RCGCWTIMER |= (1 << 5);
|
|
|
|
while (!(SYSCTL->PRWTIMER & (1 << 5)))
|
|
;
|
|
|
|
nvicEnableVector(TIVA_WGPT5A_NUMBER, TIVA_GPT_WGPT5A_IRQ_PRIORITY);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Timer configuration.*/
|
|
gptp->gpt->CTL = 0;
|
|
gptp->gpt->CFG = GPTM_CFG_CFG_SPLIT;
|
|
gptp->gpt->TAPR = ((TIVA_SYSCLK / gptp->config->frequency) - 1);
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the GPT peripheral.
|
|
*
|
|
* @param[in] gptp pointer to the @p GPTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void gpt_lld_stop(GPTDriver *gptp)
|
|
{
|
|
if (gptp->state == GPT_READY) {
|
|
gptp->gpt->IMR = 0;
|
|
gptp->gpt->TAILR = 0;
|
|
gptp->gpt->CTL = 0;
|
|
|
|
#if TIVA_GPT_USE_GPT0
|
|
if (&GPTD1 == gptp) {
|
|
nvicDisableVector(TIVA_GPT0A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 0);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_GPT1
|
|
if (&GPTD2 == gptp) {
|
|
nvicDisableVector(TIVA_GPT1A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 1);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_GPT2
|
|
if (&GPTD3 == gptp) {
|
|
nvicDisableVector(TIVA_GPT2A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 2);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_GPT3
|
|
if (&GPTD4 == gptp) {
|
|
nvicDisableVector(TIVA_GPT3A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 3);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_GPT4
|
|
if (&GPTD5 == gptp) {
|
|
nvicDisableVector(TIVA_GPT4A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 4);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_GPT5
|
|
if (&GPTD6 == gptp) {
|
|
nvicDisableVector(TIVA_GPT5A_NUMBER);
|
|
SYSCTL->RCGCTIMER &= ~(1 << 5);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT0
|
|
if (&GPTD7 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT0A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 0);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT1
|
|
if (&GPTD8 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT1A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 1);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT2
|
|
if (&GPTD9 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT2A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 2);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT3
|
|
if (&GPTD10 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT3A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 3);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT4
|
|
if (&GPTD11 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT4A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 4);
|
|
}
|
|
#endif
|
|
|
|
#if TIVA_GPT_USE_WGPT5
|
|
if (&GPTD12 == gptp) {
|
|
nvicDisableVector(TIVA_WGPT5A_NUMBER);
|
|
SYSCTL->RCGCWTIMER &= ~(1 << 5);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Starts the timer in continuous mode.
|
|
*
|
|
* @param[in] gptp pointer to the @p GPTDriver object
|
|
* @param[in] interval period in ticks
|
|
*
|
|
* @notapi
|
|
*/
|
|
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval)
|
|
{
|
|
gptp->gpt->TAILR = interval - 1;
|
|
gptp->gpt->ICR = 0xfffffff;
|
|
gptp->gpt->IMR = GPTM_IMR_TATOIM;
|
|
gptp->gpt->TAMR = GPTM_TAMR_TAMR_PERIODIC | GPTM_TAMR_TAILD | GPTM_TAMR_TASNAPS;
|
|
gptp->gpt->CTL = GPTM_CTL_TAEN | GPTM_CTL_TASTALL;
|
|
}
|
|
|
|
/**
|
|
* @brief Stops the timer.
|
|
*
|
|
* @param[in] gptp pointer to the @p GPTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void gpt_lld_stop_timer(GPTDriver *gptp)
|
|
{
|
|
gptp->gpt->IMR = 0;
|
|
gptp->gpt->TAILR = 0;
|
|
gptp->gpt->CTL &= ~GPTM_CTL_TAEN;
|
|
}
|
|
|
|
/**
|
|
* @brief Starts the timer in one shot mode and waits for completion.
|
|
* @details This function specifically polls the timer waiting for completion
|
|
* in order to not have extra delays caused by interrupt servicing,
|
|
* this function is only recommended for short delays.
|
|
*
|
|
* @param[in] gptp pointer to the @p GPTDriver object
|
|
* @param[in] interval time interval in ticks
|
|
*
|
|
* @notapi
|
|
*/
|
|
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval)
|
|
{
|
|
gptp->gpt->TAMR = GPTM_TAMR_TAMR_ONESHOT | GPTM_TAMR_TAILD | GPTM_TAMR_TASNAPS;
|
|
gptp->gpt->TAILR = interval - 1;
|
|
gptp->gpt->ICR = 0xffffffff;
|
|
gptp->gpt->CTL = GPTM_CTL_TAEN | GPTM_CTL_TASTALL;
|
|
while (!(gptp->gpt->RIS & GPTM_IMR_TATOIM))
|
|
;
|
|
gptp->gpt->ICR = 0xffffffff;
|
|
}
|
|
|
|
#endif /* HAL_USE_GPT */
|
|
|
|
/** @} */
|