103 lines
4.5 KiB
C
103 lines
4.5 KiB
C
/****************************************************************************
|
|
* drivers/audio/cs4344.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 __DRIVERS_AUDIO_CS4344_H
|
|
#define __DRIVERS_AUDIO_CS4344_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/compiler.h>
|
|
|
|
#include <pthread.h>
|
|
#include <mqueue.h>
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <nuttx/wqueue.h>
|
|
#include <nuttx/mutex.h>
|
|
#include <nuttx/fs/ioctl.h>
|
|
|
|
#ifdef CONFIG_AUDIO
|
|
|
|
/****************************************************************************
|
|
* Pre-Processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define CS4344_DEFAULT_SAMPRATE 11025 /* Initial sample rate */
|
|
#define CS4344_DEFAULT_NCHANNELS 1 /* Initial number of channels */
|
|
#define CS4344_DEFAULT_BPSAMP 16 /* Initial bits per sample */
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
struct cs4344_dev_s
|
|
{
|
|
/* We are an audio lower half driver (We are also the upper "half" of
|
|
* the CS4344 driver with respect to the board lower half driver).
|
|
*
|
|
* Terminology:
|
|
* Our "lower" half audio instances will be called dev for the publicly
|
|
* visible version and "priv" for the version that only this driver
|
|
* knows. From the point of view of this driver, it is the board lower
|
|
* "half" that is referred to as "lower".
|
|
*/
|
|
|
|
struct audio_lowerhalf_s dev; /* CS4344 audio lower half (this device) */
|
|
|
|
/* Our specific driver data goes here */
|
|
|
|
FAR struct i2s_dev_s *i2s; /* I2S driver to use */
|
|
struct dq_queue_s pendq; /* Queue of pending buffers to be sent */
|
|
struct dq_queue_s doneq; /* Queue of sent buffers to be returned */
|
|
struct file mq; /* Message queue for receiving messages */
|
|
char mqname[16]; /* Our message queue name */
|
|
pthread_t threadid; /* ID of our thread */
|
|
uint32_t bitrate; /* Actual programmed bit rate */
|
|
mutex_t pendlock; /* Protect pendq */
|
|
uint16_t samprate; /* Configured samprate (samples/sec) */
|
|
uint8_t nchannels; /* Number of channels (1 or 2) */
|
|
uint8_t bpsamp; /* Bits per sample (8 or 16) */
|
|
uint32_t mclk_freq; /* Master clock frequency */
|
|
volatile uint8_t inflight; /* Number of audio buffers in-flight */
|
|
bool running; /* True: Worker thread is running */
|
|
bool paused; /* True: Playing is paused */
|
|
bool mute; /* True: Output is muted */
|
|
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
|
|
bool terminating; /* True: Stop requested */
|
|
#endif
|
|
bool reserved; /* True: Device is reserved */
|
|
volatile int result; /* The result of the last transfer */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#endif /* CONFIG_AUDIO */
|
|
#endif /* __DRIVERS_AUDIO_CS4344_H */
|