evmdm642_aic23_outgain.c

DM642串口调试模块

/*
 *  Copyright 2003 by Spectrum Digital Incorporated.
 *  All rights reserved. Property of Spectrum Digital Incorporated.
 */

/*
 *  ======== evmdm642_aic23_setfreq.c ========
 *  EVMDM642_AIC23_setFreq() implementation
 */
 
#include <evmdm642.h>
#include <evmdm642_aic23.h>

/*
 *  ======== EVMDM642_AIC23_outGain ========
 *  Set the output gain on the codec
 */
void EVMDM642_AIC23_outGain(EVMDM642_AIC23_CodecHandle hCodec, Uint16 outGain)
{
    /* Write to codec registers (left and right) */
    EVMDM642_AIC23_rset(hCodec, EVMDM642_AIC23_LEFTHPVOL, 
        (EVMDM642_AIC23_rget(hCodec, EVMDM642_AIC23_LEFTHPVOL) & 0xff80) | (outGain & 0x7f));
    EVMDM642_AIC23_rset(hCodec, EVMDM642_AIC23_RIGHTHPVOL, 
        (EVMDM642_AIC23_rget(hCodec, EVMDM642_AIC23_RIGHTHPVOL) & 0xff80) | (outGain & 0x7f));
}