155 lines
5.4 KiB
C
155 lines
5.4 KiB
C
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/************************************************************************************
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* arch/arm/src/stm32/stm32_pwm.h
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_STM32_STM32_TIM_H
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#define __ARCH_ARM_SRC_STM32_STM32_TIM_H
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/* The STM32 does not have dedicated PWM hardware. Rather, pulsed output control
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* is a capabilitiy of the STM32 timers. The logic in this file implements the
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* lower half of the standard, NuttX PWM interface using the STM32 timers. That
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* interface is described in include/nuttx/pwm.h.
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*/
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include "chip.h"
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#include "chip/stm32_tim.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Configuration ********************************************************************/
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/* Timer devices may be used for different purposes. One special purpose is
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* to generate modulated outputs for such things as motor control. If CONFIG_STM32_TIMn
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* is defined then the CONFIG_STM32_TIMn_PWM must also be defined to indicate that
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* timer "n" is intended to be used for pulsed output signal generation.
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*/
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#ifndef CONFIG_STM32_TIM1
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# undef CONFIG_STM32_TIM1_PWM
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#endif
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#ifndef CONFIG_STM32_TIM2
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# undef CONFIG_STM32_TIM2_PWM
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#endif
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#ifndef CONFIG_STM32_TIM3
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# undef CONFIG_STM32_TIM3_PWM
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#endif
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#ifndef CONFIG_STM32_TIM4
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# undef CONFIG_STM32_TIM4_PWM
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#endif
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#ifndef CONFIG_STM32_TIM5
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# undef CONFIG_STM32_TIM5_PWM
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#endif
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#ifndef CONFIG_STM32_TIM6
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# undef CONFIG_STM32_TIM6_PWM
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#endif
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#ifndef CONFIG_STM32_TIM7
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# undef CONFIG_STM32_TIM7_PWM
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#endif
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#ifndef CONFIG_STM32_TIM8
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# undef CONFIG_STM32_TIM8_PWM
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#endif
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#ifndef CONFIG_STM32_TIM9
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# undef CONFIG_STM32_TIM9_PWM
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#endif
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#ifndef CONFIG_STM32_TIM10
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# undef CONFIG_STM32_TIM10_PWM
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#endif
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#ifndef CONFIG_STM32_TIM11
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# undef CONFIG_STM32_TIM11_PWM
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#endif
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#ifndef CONFIG_STM32_TIM12
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# undef CONFIG_STM32_TIM12_PWM
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#endif
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#ifndef CONFIG_STM32_TIM13
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# undef CONFIG_STM32_TIM13_PWM
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#endif
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#ifndef CONFIG_STM32_TIM14
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# undef CONFIG_STM32_TIM14_PWM
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#endif
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_pwminitialize
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*
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* Description:
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* Initialize one timer for use with the upper_level PWM driver.
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*
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* Input Parameters:
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* timer - A number identifying the timer use. The number of valid timer
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* IDs varies with the STM32 MCU and MCU family but is somewhere in
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* the range of {1,..,14}.
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*
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* Returned Value:
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* On success, a pointer to the STM32 lower half PWM driver is returned.
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* NULL is returned on any failure.
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*
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************************************************************************************/
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EXTERN FAR struct pwm_lowerhalf_s *stm32_pwminitialize(int timer);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_STM32_STM32_TIM_H */
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