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/*
ChibiOS - Copyright (C) 2006..2018 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 TIMv1/hal_pwm_lld.h
* @brief STM32 PWM subsystem low level driver header.
*
* @addtogroup PWM
* @{
*/
#ifndef HAL_PWM_LLD_H
#define HAL_PWM_LLD_H
#if HAL_USE_PWM || defined(__DOXYGEN__)
#include "stm32_tim.h"
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Number of PWM channels per PWM driver.
*/
#define PWM_CHANNELS STM32_TIM_MAX_CHANNELS
/**
* @name STM32-specific PWM complementary output mode macros
* @{
*/
/**
* @brief Complementary output modes mask.
* @note This is an STM32-specific setting.
*/
#define PWM_COMPLEMENTARY_OUTPUT_MASK 0xF0
/**
* @brief Complementary output not driven.
* @note This is an STM32-specific setting.
*/
#define PWM_COMPLEMENTARY_OUTPUT_DISABLED 0x00
/**
* @brief Complementary output, active is logic level one.
* @note This is an STM32-specific setting.
* @note This setting is only available if the configuration option
* @p STM32_PWM_USE_ADVANCED is set to TRUE and only for advanced
* timers TIM1 and TIM8.
*/
#define PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH 0x10
/**
* @brief Complementary output, active is logic level zero.
* @note This is an STM32-specific setting.
* @note This setting is only available if the configuration option
* @p STM32_PWM_USE_ADVANCED is set to TRUE and only for advanced
* timers TIM1 and TIM8.
*/
#define PWM_COMPLEMENTARY_OUTPUT_ACTIVE_LOW 0x20
/** @} */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief If advanced timer features switch.
* @details If set to @p TRUE the advanced features for TIM1 and TIM8 are
* enabled.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_ADVANCED) || defined(__DOXYGEN__)
#define STM32_PWM_USE_ADVANCED FALSE
#endif
/**
* @brief PWMD1 driver enable switch.
* @details If set to @p TRUE the support for PWMD1 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM1) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM1 FALSE
#endif
/**
* @brief PWMD2 driver enable switch.
* @details If set to @p TRUE the support for PWMD2 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM2) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM2 FALSE
#endif
/**
* @brief PWMD3 driver enable switch.
* @details If set to @p TRUE the support for PWMD3 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM3) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM3 FALSE
#endif
/**
* @brief PWMD4 driver enable switch.
* @details If set to @p TRUE the support for PWMD4 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM4) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM4 FALSE
#endif
/**
* @brief PWMD5 driver enable switch.
* @details If set to @p TRUE the support for PWMD5 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM5) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM5 FALSE
#endif
/**
* @brief PWMD8 driver enable switch.
* @details If set to @p TRUE the support for PWMD8 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM8) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM8 FALSE
#endif
/**
* @brief PWMD9 driver enable switch.
* @details If set to @p TRUE the support for PWMD9 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM32_PWM_USE_TIM9) || defined(__DOXYGEN__)
#define STM32_PWM_USE_TIM9 FALSE
#endif
/**
* @brief PWMD1 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM1_IRQ_PRIORITY 7
#endif
/**
* @brief PWMD2 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM2_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM2_IRQ_PRIORITY 7
#endif
/**
* @brief PWMD3 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM3_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM3_IRQ_PRIORITY 7
#endif
/**
* @brief PWMD4 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM4_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM4_IRQ_PRIORITY 7
#endif
/**
* @brief PWMD5 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM5_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM5_IRQ_PRIORITY 7
#endif
/**
* @brief PWMD8 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM8_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM8_IRQ_PRIORITY 7
#endif
/** @} */
/**
* @brief PWMD9 interrupt priority level setting.
*/
#if !defined(STM32_PWM_TIM9_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM_TIM9_IRQ_PRIORITY 7
#endif
/** @} */
/*===========================================================================*/
/* Configuration checks. */
/*===========================================================================*/
#if STM32_PWM_USE_TIM1 && !STM32_HAS_TIM1
#error "TIM1 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM2 && !STM32_HAS_TIM2
#error "TIM2 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM3 && !STM32_HAS_TIM3
#error "TIM3 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM4 && !STM32_HAS_TIM4
#error "TIM4 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM5 && !STM32_HAS_TIM5
#error "TIM5 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM8 && !STM32_HAS_TIM8
#error "TIM8 not present in the selected device"
#endif
#if STM32_PWM_USE_TIM9 && !STM32_HAS_TIM9
#error "TIM9 not present in the selected device"
#endif
#if !STM32_PWM_USE_TIM1 && !STM32_PWM_USE_TIM2 && \
!STM32_PWM_USE_TIM3 && !STM32_PWM_USE_TIM4 && \
!STM32_PWM_USE_TIM5 && !STM32_PWM_USE_TIM8 && \
!STM32_PWM_USE_TIM9
#error "PWM driver activated but no TIM peripheral assigned"
#endif
#if STM32_PWM_USE_ADVANCED && !STM32_PWM_USE_TIM1 && !STM32_PWM_USE_TIM8
#error "advanced mode selected but no advanced timer assigned"
#endif
/* Checks on allocation of TIMx units.*/
#if STM32_PWM_USE_TIM1
#if defined(STM32_TIM1_IS_USED)
#error "PWMD1 requires TIM1 but the timer is already used"
#else
#define STM32_TIM1_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM2
#if defined(STM32_TIM2_IS_USED)
#error "PWMD2 requires TIM2 but the timer is already used"
#else
#define STM32_TIM2_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM3
#if defined(STM32_TIM3_IS_USED)
#error "PWMD3 requires TIM3 but the timer is already used"
#else
#define STM32_TIM3_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM4
#if defined(STM32_TIM4_IS_USED)
#error "PWMD4 requires TIM4 but the timer is already used"
#else
#define STM32_TIM4_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM5
#if defined(STM32_TIM5_IS_USED)
#error "PWMD5 requires TIM5 but the timer is already used"
#else
#define STM32_TIM5_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM8
#if defined(STM32_TIM8_IS_USED)
#error "PWMD8 requires TIM8 but the timer is already used"
#else
#define STM32_TIM8_IS_USED
#endif
#endif
#if STM32_PWM_USE_TIM9
#if defined(STM32_TIM9_IS_USED)
#error "PWMD9 requires TIM9 but the timer is already used"
#else
#define STM32_TIM9_IS_USED
#endif
#endif
/* IRQ priority checks.*/
#if STM32_PWM_USE_TIM1 && !defined(STM32_TIM1_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM1_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM1"
#endif
#if STM32_PWM_USE_TIM2 && !defined(STM32_TIM2_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM2_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM2"
#endif
#if STM32_PWM_USE_TIM3 && !defined(STM32_TIM3_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM3_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM3"
#endif
#if STM32_PWM_USE_TIM4 && !defined(STM32_TIM4_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM4_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM4"
#endif
#if STM32_PWM_USE_TIM5 && !defined(STM32_TIM5_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM5_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM5"
#endif
#if STM32_PWM_USE_TIM8 && !defined(STM32_TIM8_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM8_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM8"
#endif
#if STM32_PWM_USE_TIM9 && !defined(STM32_TIM9_SUPPRESS_ISR) && \
!OSAL_IRQ_IS_VALID_PRIORITY(STM32_PWM_TIM9_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to TIM9"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Type of a PWM mode.
*/
typedef uint32_t pwmmode_t;
/**
* @brief Type of a PWM channel.
*/
typedef uint8_t pwmchannel_t;
/**
* @brief Type of a channels mask.
*/
typedef uint32_t pwmchnmsk_t;
/**
* @brief Type of a PWM counter.
*/
typedef uint32_t pwmcnt_t;
/**
* @brief Type of a PWM driver channel configuration structure.
*/
typedef struct {
/**
* @brief Channel active logic level.
*/
pwmmode_t mode;
/**
* @brief Channel callback pointer.
* @note This callback is invoked on the channel compare event. If set to
* @p NULL then the callback is disabled.
*/
pwmcallback_t callback;
/* End of the mandatory fields.*/
} PWMChannelConfig;
/**
* @brief Type of a PWM driver configuration structure.
*/
typedef struct {
/**
* @brief Timer clock in Hz.
* @note The low level can use assertions in order to catch invalid
* frequency specifications.
*/
uint32_t frequency;
/**
* @brief PWM period in ticks.
* @note The low level can use assertions in order to catch invalid
* period specifications.
*/
pwmcnt_t period;
/**
* @brief Periodic callback pointer.
* @note This callback is invoked on PWM counter reset. If set to
* @p NULL then the callback is disabled.
*/
pwmcallback_t callback;
/**
* @brief Channels configurations.
*/
PWMChannelConfig channels[PWM_CHANNELS];
/* End of the mandatory fields.*/
/**
* @brief TIM CR2 register initialization data.
* @note The value of this field should normally be equal to zero.
*/
uint32_t cr2;
#if STM32_PWM_USE_ADVANCED || defined(__DOXYGEN__)
/**
* @brief TIM BDTR (break & dead-time) register initialization data.
* @note The value of this field should normally be equal to zero.
*/ \
uint32_t bdtr;
#endif
/**
* @brief TIM DIER register initialization data.
* @note The value of this field should normally be equal to zero.
* @note Only the DMA-related bits can be specified in this field.
*/
uint32_t dier;
} PWMConfig;
/**
* @brief Structure representing a PWM driver.
*/
struct PWMDriver {
/**
* @brief Driver state.
*/
pwmstate_t state;
/**
* @brief Current driver configuration data.
*/
const PWMConfig *config;
/**
* @brief Current PWM period in ticks.
*/
pwmcnt_t period;
/**
* @brief Mask of the enabled channels.
*/
pwmchnmsk_t enabled;
/**
* @brief Number of channels in this instance.
*/
pwmchannel_t channels;
#if defined(PWM_DRIVER_EXT_FIELDS)
PWM_DRIVER_EXT_FIELDS
#endif
/* End of the mandatory fields.*/
/**
* @brief Timer base clock.
*/
uint32_t clock;
/**
* @brief Pointer to the TIMx registers block.
*/
stm32_tim_t *tim;
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Changes the period the PWM peripheral.
* @details This function changes the period of a PWM unit that has already
* been activated using @p pwmStart().
* @pre The PWM unit must have been activated using @p pwmStart().
* @post The PWM unit period is changed to the new value.
* @note The function has effect at the next cycle start.
* @note If a period is specified that is shorter than the pulse width
* programmed in one of the channels then the behavior is not
* guaranteed.
*
* @param[in] pwmp pointer to a @p PWMDriver object
* @param[in] period new cycle time in ticks
*
* @notapi
*/
#define pwm_lld_change_period(pwmp, period) \
((pwmp)->tim->ARR = ((period) - 1))
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if STM32_PWM_USE_TIM1 && !defined(__DOXYGEN__)
extern PWMDriver PWMD1;
#endif
#if STM32_PWM_USE_TIM2 && !defined(__DOXYGEN__)
extern PWMDriver PWMD2;
#endif
#if STM32_PWM_USE_TIM3 && !defined(__DOXYGEN__)
extern PWMDriver PWMD3;
#endif
#if STM32_PWM_USE_TIM4 && !defined(__DOXYGEN__)
extern PWMDriver PWMD4;
#endif
#if STM32_PWM_USE_TIM5 && !defined(__DOXYGEN__)
extern PWMDriver PWMD5;
#endif
#if STM32_PWM_USE_TIM8 && !defined(__DOXYGEN__)
extern PWMDriver PWMD8;
#endif
#if STM32_PWM_USE_TIM9 && !defined(__DOXYGEN__)
extern PWMDriver PWMD9;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void pwm_lld_init(void);
void pwm_lld_start(PWMDriver *pwmp);
void pwm_lld_stop(PWMDriver *pwmp);
void pwm_lld_enable_channel(PWMDriver *pwmp,
pwmchannel_t channel,
pwmcnt_t width);
void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel);
void pwm_lld_enable_periodic_notification(PWMDriver *pwmp);
void pwm_lld_disable_periodic_notification(PWMDriver *pwmp);
void pwm_lld_enable_channel_notification(PWMDriver *pwmp,
pwmchannel_t channel);
void pwm_lld_disable_channel_notification(PWMDriver *pwmp,
pwmchannel_t channel);
void pwm_lld_serve_interrupt(PWMDriver *pwmp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PWM */
#endif /* HAL_PWM_LLD_H */
/** @} */
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