www.pudn.com > 8202S.rar > auddac.c

// 
// FILE 
// auddac.c 
// 
// DESCRIPTION 
// generic auddac control 
// 
#include "user_init.h" 
 
#if defined(PCM1742) 
 
#include "config.h" 
#include "regmap.h" 
#include "global.h" 
#include "func.h" 
#include "gpio.h" 
#include "audclk.h" 
#include "auddrv.h" //2004AUDDRV oliver 20041004 for using audio driver purpose 
//#include "audif.h" 
#include "gpio.h" 
 
 
#ifdef PCM1742 
#include "pcm1742.h" 
#endif 
 
// 
// DVD board version related gpio change 
// 
#define   GPN_MCDL_MC    3 
#define   GPN_MCDL_MD    4 
#define   GPN_MCDL_ML_1  2 
// 
/* 
#define GPN_MCDL_MC     3 
#define GPN_MCDL_MD     4 
#define GPN_MCDL_ML_1   2 
*/ 
 
/* 
#define GPN_MCDL_MC     3 
#define GPN_MCDL_MD     2 
#define GPN_MCDL_ML_1   4 
*/ 
 
 
#define MCDL_MC_SET(d)  GPIO_O_SET(GPN_MCDL_MC,d) 
#define MCDL_MD_SET(d)  GPIO_O_SET(GPN_MCDL_MD,d) 
#define MCDL_ML1_SET(d) GPIO_O_SET(GPN_MCDL_ML_1,d) 
 
#define MCDL_MC_OUT()   GPIO_E_SET(GPN_MCDL_MC,1) 
#define MCDL_MD_OUT()   GPIO_E_SET(GPN_MCDL_MD,1) 
#define MCDL_ML1_OUT()  GPIO_E_SET(GPN_MCDL_ML_1,1) 
 
 
#define delay_mcdl(i)   delay_1us(i) 
 
void    write_mcdl(unsigned data) 
{ 
    int i; 
 
    MCDL_MC_SET(1); 
    MCDL_MD_SET(1); 
    MCDL_ML1_SET(0); 
   
    MCDL_MC_OUT(); 
    MCDL_MD_OUT(); 
    MCDL_ML1_OUT(); 
 
    for (i=15;i>=0;i--) 
    { 
        MCDL_MC_SET(0);             delay_mcdl(2); 
        MCDL_MD_SET((data>>i)&1);   delay_mcdl(2); 
        MCDL_MC_SET(1);             delay_mcdl(2); 
    } 
    MCDL_ML1_SET(1); 
 
    for (i=1;i>=0;i--) 
    { 
        MCDL_MC_SET(0);     delay_mcdl(2); 
        MCDL_MC_SET(1);     delay_mcdl(2); 
    } 
} 
 
 
//  
// FUNTCION 
// dac_set_vol() 
// 
// vol=0: mute 
// vol=255: 0-dB attenuation 
// 
void 
dac_set_vol(unsigned vol) 
{ 
    unsigned v; 
 
#if defined(PCM1742) 
    v = vol; 
    write_mcdl(v | (0x10<<8));        // load and set L volume 
    write_mcdl(v | (0x11<<8));        // load and set R volume 
#endif 
} 
 
 
// 
// FUNCTION 
// dac_turn_on() 
// DESCRIPTION 
// turn on dac 
// 
void    dac_turn_on() 
{ 
#ifdef PCM1742 
    int i; 
    for (i=0; i<2; i++) { 
        delay_1ms(10); 
        //Register-18 
        write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_OFF | (0x12<<8)); 
        delay_1ms(10); 
        //Register-19 
        write_mcdl(PCM1742_R19_SF_48 | (0x13<<8)); 
        delay_1ms(10); 
        //Register-20 
        write_mcdl( 
                PCM1742_R20_FMT_24RJ | 
                //PCM1742_R20_FMT_I2S | 
                (0x14<<8)); 
    } 
#endif 
 
    dac_set_vol(0xff); 
} 
 
 
 
//Set DAC Sampling frequency 
//fs:44.1K/48k 
//xck:384fs/256fs 
 
void dac_set_fs(BYTE fs) 
{ 
#ifdef PCM1742 
    switch(fs) 
    { 
        case FS_48K: 
            write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_OFF | (0x12<<8)); 
            write_mcdl(PCM1742_R19_SF_48 | (0x13<<8)); 
            break; 
        case FS_96K: 
            write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_ON | (0x12<<8)); 
            write_mcdl(PCM1742_R19_SF_48 | (0x13<<8)); 
            break; 
        case FS_44K: 
        case FS_88K: 
            write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_OFF | (0x12<<8)); 
            write_mcdl(PCM1742_R19_SF_44 | (0x13<<8)); 
            break; 
        case FS_32K: 
            write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_OFF | (0x12<<8)); 
            write_mcdl(PCM1742_R19_SF_32 | (0x13<<8)); 
            break; 
        default: 
            write_mcdl(PCM1742_R18_MUTE_OFF | PCM1742_R18_OVER_SAMPLE_OFF | (0x12<<8)); 
            write_mcdl(PCM1742_R19_SF_44 | (0x13<<8)); 
            break; 
    } 
#endif     
} 
 
 
#endif //#if defined(PCM1742)