209 lines
6.2 KiB
C
209 lines
6.2 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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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 LPC13xx/gpt_lld.h
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* @brief LPC13xx GPT subsystem low level driver header.
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*
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* @addtogroup GPT
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* @{
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*/
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#ifndef _GPT_LLD_H_
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#define _GPT_LLD_H_
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#if HAL_USE_GPT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief GPT1 driver enable switch.
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* @details If set to @p TRUE the support for GPT1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC13xx_GPT_USE_CT16B0) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_USE_CT16B0 TRUE
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#endif
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/**
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* @brief GPT2 driver enable switch.
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* @details If set to @p TRUE the support for GPT2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC13xx_GPT_USE_CT16B1) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_USE_CT16B1 TRUE
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#endif
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/**
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* @brief GPT3 driver enable switch.
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* @details If set to @p TRUE the support for GPT3 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC13xx_GPT_USE_CT32B0) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_USE_CT32B0 TRUE
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#endif
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/**
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* @brief GPT4 driver enable switch.
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* @details If set to @p TRUE the support for GPT4 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(LPC13xx_GPT_USE_CT32B1) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_USE_CT32B1 TRUE
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#endif
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/**
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* @brief GPT1 interrupt priority level setting.
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*/
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#if !defined(LPC13xx_GPT_CT16B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_CT16B0_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT2 interrupt priority level setting.
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*/
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#if !defined(LPC13xx_GPT_CT16B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_CT16B1_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT3 interrupt priority level setting.
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*/
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#if !defined(LPC13xx_GPT_CT32B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_CT32B0_IRQ_PRIORITY 2
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#endif
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/**
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* @brief GPT4 interrupt priority level setting.
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*/
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#if !defined(LPC13xx_GPT_CT32B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define LPC13xx_GPT_CT32B1_IRQ_PRIORITY 2
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if !LPC13xx_GPT_USE_CT16B0 && !LPC13xx_GPT_USE_CT16B1 && \
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!LPC13xx_GPT_USE_CT32B0 && !LPC13xx_GPT_USE_CT32B1
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#error "GPT driver activated but no CT peripheral assigned"
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief GPT frequency type.
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*/
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typedef uint32_t gptfreq_t;
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/**
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* @brief GPT counter type.
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*/
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typedef uint32_t gptcnt_t;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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/**
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* @brief Timer clock in Hz.
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* @note The low level can use assertions in order to catch invalid
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* frequency specifications.
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*/
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gptfreq_t frequency;
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/**
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* @brief Timer callback pointer.
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* @note This callback is invoked on GPT counter events.
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*/
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gptcallback_t callback;
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/* End of the mandatory fields.*/
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} GPTConfig;
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/**
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* @brief Structure representing a GPT driver.
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*/
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struct GPTDriver {
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/**
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* @brief Driver state.
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*/
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gptstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const GPTConfig *config;
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/* End of the mandatory fields.*/
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/**
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* @brief Timer base clock.
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*/
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uint32_t clock;
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/**
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* @brief Pointer to the CTxxBy registers block.
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*/
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LPC_TMR_TypeDef *tmr;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if LPC13xx_GPT_USE_CT16B0 && !defined(__DOXYGEN__)
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extern GPTDriver GPTD1;
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#endif
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#if LPC13xx_GPT_USE_CT16B1 && !defined(__DOXYGEN__)
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extern GPTDriver GPTD2;
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#endif
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#if LPC13xx_GPT_USE_CT32B0 && !defined(__DOXYGEN__)
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extern GPTDriver GPTD3;
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#endif
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#if LPC13xx_GPT_USE_CT32B1 && !defined(__DOXYGEN__)
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extern GPTDriver GPTD4;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void gpt_lld_init(void);
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void gpt_lld_start(GPTDriver *gptp);
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void gpt_lld_stop(GPTDriver *gptp);
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void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t period);
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void gpt_lld_stop_timer(GPTDriver *gptp);
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void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_GPT */
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#endif /* _GPT_LLD_H_ */
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/** @} */
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