398 lines
12 KiB
C
398 lines
12 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/pwm_lld.h
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* @brief STM32 PWM subsystem low level driver header.
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*
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* @addtogroup PWM
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* @{
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*/
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#ifndef _PWM_LLD_H_
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#define _PWM_LLD_H_
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#if HAL_USE_PWM || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @brief Number of PWM channels per PWM driver.
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*/
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#define PWM_CHANNELS 4
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/**
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* @brief Complementary output modes mask.
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* @note This is an STM32-specific setting.
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*/
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#define PWM_COMPLEMENTARY_OUTPUT_MASK 0xF0
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/**
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* @brief Complementary output not driven.
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* @note This is an STM32-specific setting.
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*/
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#define PWM_COMPLEMENTARY_OUTPUT_DISABLED 0x00
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/**
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* @brief Complementary output, active is logic level one.
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* @note This is an STM32-specific setting.
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* @note This setting is only available if the configuration option
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* @p STM32_PWM_USE_ADVANCED is set to TRUE and only for advanced
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* timers TIM1 and TIM8.
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*/
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#define PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH 0x10
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/**
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* @brief Complementary output, active is logic level zero.
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* @note This is an STM32-specific setting.
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* @note This setting is only available if the configuration option
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* @p STM32_PWM_USE_ADVANCED is set to TRUE and only for advanced
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* timers TIM1 and TIM8.
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*/
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#define PWM_COMPLEMENTARY_OUTPUT_ACTIVE_LOW 0x20
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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 If advanced timer features switch.
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* @details If set to @p TRUE the advanced features for TIM1 and TIM8 are
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* enabled.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_ADVANCED) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_ADVANCED TRUE
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#endif
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/**
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* @brief PWMD1 driver enable switch.
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* @details If set to @p TRUE the support for PWMD1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM1) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM1 TRUE
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#endif
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/**
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* @brief PWMD2 driver enable switch.
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* @details If set to @p TRUE the support for PWMD2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM2) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM2 TRUE
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#endif
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/**
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* @brief PWMD3 driver enable switch.
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* @details If set to @p TRUE the support for PWMD3 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM3) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM3 TRUE
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#endif
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/**
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* @brief PWMD4 driver enable switch.
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* @details If set to @p TRUE the support for PWMD4 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM4) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM4 TRUE
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#endif
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/**
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* @brief PWMD5 driver enable switch.
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* @details If set to @p TRUE the support for PWMD5 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM5) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM5 TRUE
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#endif
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/**
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* @brief PWMD8 driver enable switch.
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* @details If set to @p TRUE the support for PWMD8 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_PWM_USE_TIM8) || defined(__DOXYGEN__)
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#define STM32_PWM_USE_TIM8 TRUE
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#endif
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/**
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* @brief PWMD1 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM1_IRQ_PRIORITY 7
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#endif
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/**
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* @brief PWMD2 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM2_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM2_IRQ_PRIORITY 7
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#endif
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/**
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* @brief PWMD3 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM3_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM3_IRQ_PRIORITY 7
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#endif
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/**
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* @brief PWMD4 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM4_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM4_IRQ_PRIORITY 7
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#endif
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/**
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* @brief PWMD5 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM5_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM5_IRQ_PRIORITY 7
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#endif
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/**
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* @brief PWMD8 interrupt priority level setting.
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*/
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#if !defined(STM32_PWM_TIM8_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_PWM_TIM8_IRQ_PRIORITY 7
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#endif
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/*===========================================================================*/
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/* Configuration checks. */
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/*===========================================================================*/
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#if STM32_PWM_USE_TIM1 && !STM32_HAS_TIM1
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#error "TIM1 not present in the selected device"
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#endif
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#if STM32_PWM_USE_TIM2 && !STM32_HAS_TIM2
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#error "TIM2 not present in the selected device"
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#endif
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#if STM32_PWM_USE_TIM3 && !STM32_HAS_TIM3
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#error "TIM3 not present in the selected device"
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#endif
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#if STM32_PWM_USE_TIM4 && !STM32_HAS_TIM4
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#error "TIM4 not present in the selected device"
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#endif
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#if STM32_PWM_USE_TIM5 && !STM32_HAS_TIM5
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#error "TIM5 not present in the selected device"
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#endif
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#if STM32_PWM_USE_TIM8 && !STM32_HAS_TIM8
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#error "TIM8 not present in the selected device"
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#endif
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#if !STM32_PWM_USE_TIM1 && !STM32_PWM_USE_TIM2 && \
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!STM32_PWM_USE_TIM3 && !STM32_PWM_USE_TIM4 && \
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!STM32_PWM_USE_TIM5 && !STM32_PWM_USE_TIM8
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#error "PWM driver activated but no TIM peripheral assigned"
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#endif
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#if STM32_PWM_USE_ADVANCED && !STM32_PWM_USE_TIM1 && !STM32_PWM_USE_TIM8
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#error "advanced mode selected but no advanced timer 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 PWM mode type.
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*/
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typedef uint32_t pwmmode_t;
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/**
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* @brief PWM channel type.
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*/
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typedef uint8_t pwmchannel_t;
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/**
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* @brief PWM counter type.
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*/
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typedef uint16_t pwmcnt_t;
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/**
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* @brief PWM driver channel configuration structure.
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*/
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typedef struct {
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/**
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* @brief Channel active logic level.
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*/
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pwmmode_t mode;
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/**
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* @brief Channel callback pointer.
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* @note This callback is invoked on the channel compare event. If set to
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* @p NULL then the callback is disabled.
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*/
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pwmcallback_t callback;
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/* End of the mandatory fields.*/
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} PWMChannelConfig;
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/**
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* @brief PWM driver configuration structure.
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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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uint32_t frequency;
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/**
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* @brief PWM period in ticks.
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* @note The low level can use assertions in order to catch invalid
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* period specifications.
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*/
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pwmcnt_t period;
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/**
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* @brief Periodic callback pointer.
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* @note This callback is invoked on PWM counter reset. If set to
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* @p NULL then the callback is disabled.
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*/
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pwmcallback_t callback;
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/**
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* @brief Channels configurations.
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*/
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PWMChannelConfig channels[PWM_CHANNELS];
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/* End of the mandatory fields.*/
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/**
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* @brief TIM CR2 register initialization data.
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* @note The value of this field should normally be equal to zero.
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*/
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uint16_t cr2;
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#if STM32_PWM_USE_ADVANCED || defined(__DOXYGEN__)
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/**
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* @brief TIM BDTR (break & dead-time) register initialization data.
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* @note The value of this field should normally be equal to zero.
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*/ \
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uint16_t bdtr;
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#endif
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} PWMConfig;
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/**
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* @brief Structure representing a PWM driver.
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*/
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struct PWMDriver {
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/**
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* @brief Driver state.
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*/
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pwmstate_t state;
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/**
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* @brief Current driver configuration data.
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*/
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const PWMConfig *config;
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/**
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* @brief Current PWM period in ticks.
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*/
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pwmcnt_t period;
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#if defined(PWM_DRIVER_EXT_FIELDS)
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PWM_DRIVER_EXT_FIELDS
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#endif
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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 TIMx registers block.
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*/
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TIM_TypeDef *tim;
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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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* @brief Changes the period the PWM peripheral.
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* @details This function changes the period of a PWM unit that has already
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* been activated using @p pwmStart().
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* @pre The PWM unit must have been activated using @p pwmStart().
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* @post The PWM unit period is changed to the new value.
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* @note The function has effect at the next cycle start.
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* @note If a period is specified that is shorter than the pulse width
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* programmed in one of the channels then the behavior is not
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* guaranteed.
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*
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* @param[in] pwmp pointer to a @p PWMDriver object
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* @param[in] period new cycle time in ticks
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*
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* @notapi
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*/
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#define pwm_lld_change_period(pwmp, period) \
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((pwmp)->tim->ARR = (uint16_t)((period) - 1))
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if STM32_PWM_USE_TIM1 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD1;
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#endif
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#if STM32_PWM_USE_TIM2 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD2;
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#endif
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#if STM32_PWM_USE_TIM3 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD3;
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#endif
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#if STM32_PWM_USE_TIM4 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD4;
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#endif
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#if STM32_PWM_USE_TIM5 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD5;
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#endif
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#if STM32_PWM_USE_TIM8 && !defined(__DOXYGEN__)
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extern PWMDriver PWMD8;
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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 pwm_lld_init(void);
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void pwm_lld_start(PWMDriver *pwmp);
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void pwm_lld_stop(PWMDriver *pwmp);
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void pwm_lld_enable_channel(PWMDriver *pwmp,
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pwmchannel_t channel,
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pwmcnt_t width);
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void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_PWM */
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#endif /* _PWM_LLD_H_ */
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/** @} */
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