209 lines
6.0 KiB
C
209 lines
6.0 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file LPC43xx/gpt_lld.h
|
|
* @brief LPC43xx GPT subsystem low level driver header.
|
|
*
|
|
* @addtogroup GPT
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _GPT_LLD_H_
|
|
#define _GPT_LLD_H_
|
|
|
|
#if HAL_USE_GPT || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief GPT1 driver enable switch.
|
|
* @details If set to @p TRUE the support for GPT1 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC_GPT_USE_TIM0) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_USE_TIM0 TRUE
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT2 driver enable switch.
|
|
* @details If set to @p TRUE the support for GPT2 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC_GPT_USE_TIM1) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_USE_TIM1 TRUE
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT3 driver enable switch.
|
|
* @details If set to @p TRUE the support for GPT3 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC_GPT_USE_TIM2) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_USE_TIM2 TRUE
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT4 driver enable switch.
|
|
* @details If set to @p TRUE the support for GPT4 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC_GPT_USE_TIM3) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_USE_TIM3 TRUE
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT1 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC_GPT_TIM0_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_TIM0_IRQ_PRIORITY 2
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT2 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC_GPT_TIM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_TIM1_IRQ_PRIORITY 2
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT3 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC_GPT_TIM2_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_TIM2_IRQ_PRIORITY 2
|
|
#endif
|
|
|
|
/**
|
|
* @brief GPT4 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC_GPT_TIM3_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC_GPT_TIM3_IRQ_PRIORITY 2
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
#if !LPC_GPT_USE_TIM0 && !LPC_GPT_USE_TIM1 && \
|
|
!LPC_GPT_USE_TIM2 && !LPC_GPT_USE_TIM3
|
|
#error "GPT driver activated but no CT peripheral assigned"
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief GPT frequency type.
|
|
*/
|
|
typedef uint32_t gptfreq_t;
|
|
|
|
/**
|
|
* @brief GPT counter type.
|
|
*/
|
|
typedef uint32_t gptcnt_t;
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Timer clock in Hz.
|
|
* @note The low level can use assertions in order to catch invalid
|
|
* frequency specifications.
|
|
*/
|
|
gptfreq_t frequency;
|
|
/**
|
|
* @brief Timer callback pointer.
|
|
* @note This callback is invoked on GPT counter events.
|
|
*/
|
|
gptcallback_t callback;
|
|
/* End of the mandatory fields.*/
|
|
} GPTConfig;
|
|
|
|
/**
|
|
* @brief Structure representing a GPT driver.
|
|
*/
|
|
struct GPTDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
gptstate_t state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const GPTConfig *config;
|
|
/* End of the mandatory fields.*/
|
|
/**
|
|
* @brief Timer base clock.
|
|
*/
|
|
uint32_t clock;
|
|
/**
|
|
* @brief Pointer to the LPC_TIMERx registers block.
|
|
*/
|
|
LPC_TIMERn_Type *tmr;
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if LPC_GPT_USE_TIM0 && !defined(__DOXYGEN__)
|
|
extern GPTDriver GPTD1;
|
|
#endif
|
|
|
|
#if LPC_GPT_USE_TIM1 && !defined(__DOXYGEN__)
|
|
extern GPTDriver GPTD2;
|
|
#endif
|
|
|
|
#if LPC_GPT_USE_TIM2 && !defined(__DOXYGEN__)
|
|
extern GPTDriver GPTD3;
|
|
#endif
|
|
|
|
#if LPC_GPT_USE_TIM3 && !defined(__DOXYGEN__)
|
|
extern GPTDriver GPTD4;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void gpt_lld_init(void);
|
|
void gpt_lld_start(GPTDriver *gptp);
|
|
void gpt_lld_stop(GPTDriver *gptp);
|
|
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t period);
|
|
void gpt_lld_stop_timer(GPTDriver *gptp);
|
|
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_GPT */
|
|
|
|
#endif /* _GPT_LLD_H_ */
|
|
|
|
/** @} */
|