evm5509_aic23_outgain.c

来自「dsp 5509a MMC 卡 ID号读取 12Mhzx16=192M」· C语言 代码 · 共 27 行

/*
 *  Copyright 2004 by Spectrum Digital Incorporated.
 *  All rights reserved. Property of Spectrum Digital Incorporated.
 */

/*
 *  ======== evm5509_aic23_setfreq.c ========
 *  EVM5509_AIC23_setFreq() implementation
 */
 
#include <evm5509.h>
#include <evm5509_aic23.h>

/*
 *  ======== EVM5509_AIC23_outGain ========
 *  Set the output gain on the codec
 */
void EVM5509_AIC23_outGain(EVM5509_AIC23_CodecHandle hCodec, Uint16 outGain)
{
    /* Write to codec registers (left and right) */
    EVM5509_AIC23_rset(hCodec, EVM5509_AIC23_LEFTHPVOL, 
        (EVM5509_AIC23_rget(hCodec, EVM5509_AIC23_LEFTHPVOL) & 0xff80) | (outGain & 0x7f));
    EVM5509_AIC23_rset(hCodec, EVM5509_AIC23_RIGHTHPVOL, 
        (EVM5509_AIC23_rget(hCodec, EVM5509_AIC23_RIGHTHPVOL) & 0xff80) | (outGain & 0x7f));
}