nuttx-apps/examples/qencoder/qe.h
Pressl, Štěpán 1a7da54a9b examples/qencoder: obtain samples using the QEIOC_GETINDEX ioctl call
Normally, the qencoder position is obtained using the QEIOC_POSITION
ioctl call. Adding the -i argument uses the QEIOC_GETINDEX to
obtain the qe_index_s struct containing the position alongisde
other fields.

Signed-off-by: Stepan Pressl <pressste@fel.cvut.cz>
2024-07-29 22:28:56 +08:00

54 lines
2.2 KiB
C

/****************************************************************************
* apps/examples/qencoder/qe.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 __APPS_EXAMPLES_QENCODER_QE_H
#define __APPS_EXAMPLES_QENCODER_QE_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
struct qe_example_s
{
FAR char *devpath; /* Path to the QE device */
bool reset; /* True: set the count back to zero */
bool use_qeindex; /* True: use the QEIOC_GETINDEX call to get samples */
unsigned int nloops; /* Collect this number of samples */
unsigned int delay; /* Delay this number of seconds between samples */
};
/****************************************************************************
* Public Data
****************************************************************************/
extern struct qe_example_s g_qeexample;
#endif /* __APPS_EXAMPLES_QENCODER_QE_H */