d91b5c43d1
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4425 42af7a65-404d-4744-a932-0658087f49c3
143 lines
4.8 KiB
C
143 lines
4.8 KiB
C
/************************************************************************************
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* arch/arm/src/stm32/stm32_qencoder.h
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*
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* Copyright (C) 2012 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_QENCODER_H
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#define __ARCH_ARM_SRC_STM32_STM32_QENCODER_H
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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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#ifdef CONFIG_QENCODER
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/************************************************************************************
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* Included Files
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************************************************************************************/
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/* Timer devices may be used for different purposes. One special purpose is as
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* a quadrature encoder input device. If CONFIG_STM32_TIMn is defined then the
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* CONFIG_STM32_TIMn_QE must also be defined to indicate that timer "n" is intended
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* to be used for as a quadrature encoder.
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*/
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#ifndef CONFIG_STM32_TIM1
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# undef CONFIG_STM32_TIM1_QE
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#endif
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#ifndef CONFIG_STM32_TIM2
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# undef CONFIG_STM32_TIM2_QE
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#endif
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#ifndef CONFIG_STM32_TIM3
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# undef CONFIG_STM32_TIM3_QE
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#endif
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#ifndef CONFIG_STM32_TIM4
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# undef CONFIG_STM32_TIM4_QE
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#endif
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#ifndef CONFIG_STM32_TIM5
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# undef CONFIG_STM32_TIM5_QE
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#endif
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#ifndef CONFIG_STM32_TIM8
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# undef CONFIG_STM32_TIM8_QE
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#endif
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/* Only timers 2-5, and 1 & 8 can be used as a quadrature encoder (at least for the
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* STM32 F4)
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*/
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#undef CONFIG_STM32_TIM6_QE
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#undef CONFIG_STM32_TIM7_QE
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#undef CONFIG_STM32_TIM9_QE
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#undef CONFIG_STM32_TIM10_QE
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#undef CONFIG_STM32_TIM11_QE
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#undef CONFIG_STM32_TIM12_QE
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#undef CONFIG_STM32_TIM13_QE
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#undef CONFIG_STM32_TIM14_QE
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/* Clock out frequency. This value is used to calculation the timer CLKIN in
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* prescaler value.
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*/
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#ifndef CONFIG_STM32_TIM1_QECLKOUT
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# define CONFIG_STM32_TIM1_QECLKOUT 28000000
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#endif
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#ifndef CONFIG_STM32_TIM2_QECLKOUT
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# define CONFIG_STM32_TIM2_QECLKOUT 28000000
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#endif
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#ifndef CONFIG_STM32_TIM3_QECLKOUT
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# define CONFIG_STM32_TIM3_QECLKOUT 28000000
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#endif
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#ifndef CONFIG_STM32_TIM4_QECLKOUT
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# define CONFIG_STM32_TIM4_QECLKOUT 28000000
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#endif
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#ifndef CONFIG_STM32_TIM5_QECLKOUT
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# define CONFIG_STM32_TIM5_QECLKOUT 28000000
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#endif
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#ifndef CONFIG_STM32_TIM8_QECLKOUT
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# define CONFIG_STM32_TIM8_QECLKOUT 28000000
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#endif
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/************************************************************************************
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* Included Files
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_qeinitialize
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*
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* Description:
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* Initialize a quadrature encoder interface. This function must be called from
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* board-specific logic..
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*
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* Input Parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/qe0"
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* tim - The timer number to used. 'tim' must be an element of {1,2,3,4,5,8}
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*
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* Returned Values:
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* Zero on success; A negated errno value is returned on failure.
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*
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************************************************************************************/
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int stm32_qeinitialize(FAR const char *devpath, int tim);
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#endif /* CONFIG_QENCODER */
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#endif /* __ARCH_ARM_SRC_STM32_STM32_QENCODER_H */
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