pcm.h

sharp s Lh75401 PWM audio的例子

/*********************************************************************** 
 * $Workfile:   pcm.h  $ 
 * $Revision:   1.0  $ 
 * $Author:   AnvikE  $ 
 * $Date:   Jul 03 2003 17:32:18  $ 
 * 
 * Project:     
 * 
 * Description: 
 * 
 * Revision History: 
 * $Log:
 *********************************************************************** 
 * 
 *  Copyright (c) 2002 Sharp Microelectronics of the Americas 
 * 
 *  All rights reserved 
 * 
 *  SHARP MICROELECTRONICS OF THE AMERICAS MAKES NO REPRESENTATION 
 *  OR WARRANTIES WITH RESPECT TO THE PERFORMANCE OF THIS SOFTWARE, 
 *  AND SPECIFICALLY DISCLAIMS ANY RESPONSIBILITY FOR ANY DAMAGES, 
 *  SPECIAL OR CONSEQUENTIAL, CONNECTED WITH THE USE OF THIS SOFTWARE. 
 * 
 *  SHARP MICROELECTRONICS OF THE AMERICAS PROVIDES THIS SOFTWARE SOLELY 
 *  FOR THE PURPOSE OF SOFTWARE DEVELOPMENT INCORPORATING THE USE OF A 
 *  SHARP MICROCONTROLLER OR SYSTEM-ON-CHIP PRODUCT. USE OF THIS SOURCE 
 *  FILE IMPLIES ACCEPTANCE OF THESE CONDITIONS. 
 * 
 **********************************************************************/ 

#ifndef PCM_H
#define PCM_H

/* 
 * lh754xx chip related macros and defines  
 * location - [sharpmcu/software/csps/lh754xx/include]
 */
#include "lh754xx_chip.h"

/* sound structure */
typedef struct PCM_SOUND_CLIP_S 
{
    /* name of the sound clip */
    CHAR*  name;
    /* title of the sound clip */
    CHAR*  title;
    /* number of samples in the clip */
    UNS_32 size;
    /* maximum counts per sample */
    INT_32 cnts_per_pulse;
    /* rate at which the clip was sampled */
    INT_32 sample_rate;
    /* full scale pcm value */
    UNS_32 full_scale_value;
    /* sample size 1 - 8bits 2 - 16bits */
    UNS_32 sample_size;
    /* sample mask */
    UNS_16 sample_mask;
} PCM_SOUND_CLIP_T, *PPCM_SOUND_CLIP_T; 

/* driver structure */
typedef struct PCM_DRIVER_S
{
    /* reference to sound clips */
    PCM_SOUND_CLIP_T* sound;
    /* number of clips */
    UNS_32            nclips;
    /* callback method used to signal when clip is done */
    PFV               cb;
    /* mode of operation - single ended or diffential */
    UNS_32            mode;
} PCM_DRIVER_T, *PPCM_DRIVER_T; 

/* driver modes */
typedef enum
{
    /* use to driver in differential mode */
    PCM_DIFFERENTIAL = 0,
    /* use to driver in single ended mode */
    PCM_SINGLE_ENDED
} PCM_MODE_T;

#if defined(__cplusplus)
extern "C"
{
#endif

EXTERN void pcm_start_codec (INT_32, INT_32, INT_32);
EXTERN void pcm_stop_codec (void);
EXTERN void pcm_to_pwm_sample (void);
EXTERN CHAR* pcm_get_clip_name (INT_32);
EXTERN void pcm_init_codec (void*, UNS_32);
EXTERN UNS_32 pcm_get_sample_rate (INT_32);
EXTERN UNS_32 pcm_get_max_clips (void);
EXTERN UNS_32 pcm_get_name (INT_32);

#if defined(__cplusplus)
}
#endif

#endif /* PCM_H */