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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file STM32/pwm_lld.h
* @brief STM32 PWM subsystem low level driver header.
* @addtogroup STM32_PWM
* @{
*/
#ifndef _PWM_LLD_H_
#define _PWM_LLD_H_
#if CH_HAL_USE_PWM || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Number of PWM channels per PWM driver.
*/
#define PWM_CHANNELS 4
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief PWM1 driver enable switch.
* @details If set to @p TRUE the support for PWM1 is included.
* @note The default is @p TRUE.
*/
#if !defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
#define USE_STM32_PWM1 TRUE
#endif
/**
* @brief PWM1 interrupt priority level setting.
* @note @p BASEPRI_KERNEL >= @p STM32_PWM1_IRQ_PRIORITY > @p PRIORITY_PENDSV.
*/
#if !defined(STM32_PWM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM1_IRQ_PRIORITY 0x80
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief PWM channel type.
*/
typedef uint8_t pwmchannel_t;
/**
* @brief PWM counter type.
*/
typedef uint16_t pwmcnt_t;
/**
* @brief PWM driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
} PWMConfig;
/**
* @brief PWM driver channel configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
/**
* @brief Channel idle logic level.
*/
pwmmode_t pcc_mode;
/**
* @brief Channel callback edges.
*/
pwmedge_t pcc_edge;
/**
* @brief Channel callback pointer.
*/
pwmcallback_t pcc_callback;
/* End of the mandatory fields.*/
} PWMChannelConfig;
/**
* @brief Structure representing a PWM driver.
*/
typedef struct {
/**
* @brief Driver state.
*/
pwmstate_t pd_state;
/**
* @brief Current driver configuration data.
*/
const PWMConfig *pd_config;
/**
* @brief Current channel configurations.
*/
const PWMChannelConfig *pd_channel_configs[PWM_CHANNELS];
/* End of the mandatory fields.*/
/**
* @brief Bit mask of the enabled channels.
*/
uint32_t pd_enabled_channels;
} PWMDriver;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/** @cond never*/
#if defined(USE_STM32_PWM1)
extern PWMDriver PWMD1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void pwm_lld_init(void);
void pwm_lld_start(PWMDriver *pwmp);
void pwm_lld_stop(PWMDriver *pwmp);
bool_t pwm_lld_is_enabled(PWMDriver *pwmp, pwmchannel_t channel);
void pwm_lld_setup_channel(PWMDriver *pwmp, pwmchannel_t channel);
void pwm_lld_enable_channel(PWMDriver *pwmp,
pwmchannel_t channel,
pwmcnt_t width);
void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel);
#ifdef __cplusplus
}
#endif
/** @endcond*/
#endif /* CH_HAL_USE_PWM */
#endif /* _PWM_LLD_H_ */
/** @} */
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