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- /****************************************************************************
- * include/nuttx/audio/vs1053.h
- *
- * Copyright (C) 2013 Ken Pettit. All rights reserved.
- * Author: Ken Pettit <pettitkd@gmail.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- #ifndef __INCLUDE_NUTTX_AUDIO_VS1053_H
- #define __INCLUDE_NUTTX_AUDIO_VS1053_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <stdint.h>
- #include <stdbool.h>
- #include <nuttx/irq.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* VS1053 Configuration Settings:
- *
- * CONFIG_AUDIO_VS1053 - Enabled VS1053 support
- * CONFIG_VS1053_SPIMODE - Controls the SPI mode
- */
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /* The VS1053 provides Data Request (DREQ) interrupts to the MCU via a GPIO
- * pin and also has a chip reset GPIO. The following structure provides an
- * MCU-independent mechanism for controlling the VS1053 GPIOs.
- */
- struct vs1053_lower_s
- {
- int (*attach)(FAR const struct vs1053_lower_s *lower, xcpt_t handler,
- FAR void *arg);
- void (*enable)(FAR const struct vs1053_lower_s *lower);
- void (*disable)(FAR const struct vs1053_lower_s *lower);
- void (*reset)(FAR const struct vs1053_lower_s *lower, bool state);
- int (*read_dreq)(FAR const struct vs1053_lower_s *lower);
- int irq;
- };
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- #ifdef __cplusplus
- #define EXTERN extern "C"
- extern "C"
- {
- #else
- #define EXTERN extern
- #endif
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- /****************************************************************************
- * Name: vs1053_initialize
- *
- * Description:
- * Initialize the VS1053 driver. This will perform a chip reset of the
- * device as part of initialization.
- *
- * Input Parameters:
- * spi - A reference to the platform's SPI driver for the VS1053
- * lower - The MCU-specific interrupt used to control low-level MCU
- * functions (i.e., VS1053 GPIO interrupts).
- * devno - If more than one VS1053 is supported, then this is the
- * zero based number that identifies the VS1053;
- *
- * Returned Value:
- * OK on success; Negated errno on failure.
- *
- * Assumptions:
- *
- ****************************************************************************/
- struct spi_dev_s; /* See nuttx/spi/spi.h */
- struct audio_lowerhalf_s; /* See nuttx/audio/audio.h */
- FAR struct audio_lowerhalf_s *vs1053_initialize(FAR struct spi_dev_s *spi,
- FAR const struct vs1053_lower_s *lower,
- unsigned int devno);
- #undef EXTERN
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCLUDE_NUTTX_AUDIO_VS1053_H */
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