* 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
****************************************************************************/
* 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
#endif