8f23a2db01
Option CONFIG_SENSORS_QENCODER might be configured even if SAMv7 qencoder over timer counter is not used (for example encoder over GPIO is selected with CONFIG_SAMV7_GPIO_ENC). This can cause compile warnings, also build of sam_qencoder.c file is unnecessary in that case. New hidden option CONFIG_SAMV7_QENCODER is added and automatically selected if at least one timer counter is enabled for qencoder. Build is triggered on this option. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/****************************************************************************
|
|
* arch/arm/src/samv7/sam_qencoder.h
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __ARCH_ARM_SRC_SAMV7_SAM_QENCODER_H
|
|
#define __ARCH_ARM_SRC_SAMV7_SAM_QENCODER_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include "chip.h"
|
|
|
|
#if defined(CONFIG_SENSORS_QENCODER) && defined(CONFIG_SAMV7_QENCODER)
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
/* Timer devices may be used for different purposes. One special purpose is
|
|
* as a quadrature encoder input device. CONFIG_SAMV7_TCn is defined
|
|
* then the CONFIG_SAMV7_TCn_QE must also be defined to indicate that timer
|
|
* "n" is intended to be used for as a quadrature encoder.
|
|
*/
|
|
|
|
#ifndef CONFIG_SAMV7_TC0
|
|
# undef CONFIG_SAMV7_TC0_QE
|
|
#endif
|
|
#ifndef CONFIG_SAMV7_TC1
|
|
# undef CONFIG_SAMV7_TC1_QE
|
|
#endif
|
|
#ifndef CONFIG_SAMV7_TC2
|
|
# undef CONFIG_SAMV7_TC2_QE
|
|
#endif
|
|
#ifndef CONFIG_SAMV7_TC3
|
|
# undef CONFIG_SAMV7_TC3_QE
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sam_qeinitialize
|
|
*
|
|
* Description:
|
|
* Initialize a quadrature encoder interface. This function must be called
|
|
* from board-specific logic..
|
|
*
|
|
* Input Parameters:
|
|
* devpath - The full path to the driver to register. E.g., "/dev/qe0"
|
|
* tc - The timer counter number to used. 'tc' must be an element of
|
|
* {0,1,2,3}
|
|
*
|
|
* Returned Value:
|
|
* Zero on success; A negated errno value is returned on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int sam_qeinitialize(const char *devpath, int tc);
|
|
|
|
#endif /* CONFIG_SENSORS_QENCODER && CONFIG_SAMV7_QENCODER */
|
|
#endif /* __ARCH_ARM_SRC_SAMV7_SAM_QENCODER_H */
|