HRESULT akm4384_msgFunc (CODEC_MSG msg, uint32 data0, uint32 data1)
{
switch (msg)
{
case MM_LOST_LOCK:
targetWriteCodecSPIWord(0x608c); //pwr down, set for I2C
break;
case MM_GOT_LOCK:
targetWriteCodecSPIWord(0x608f); //pwr up, set for I2C
break;
case MM_SET_OUTGAIN:
targetWriteCodecSPIWord(0x6300 | (data0&0xff)); //left gain
targetWriteCodecSPIWord(0x6400 | (data0&0xff)); //right gain
break;
}
return NO_ERROR;
}
static HRESULT cliSpi(uint32 dev, uint32 w)
{
if (dev==0)
targetWriteCodecSPIWord (w);
else if (dev==1)
targetWriteLEDSPIWord(w);
else if (dev==2)
targetWriteDisplaySPIWord(w);
else if (dev==3)
targetWriteDspSPIWord(w);
return NO_ERROR;
}
//This function is called when lock is obtained, lost or when the
//rate mode has changed.
//This particular codec is programmed to use I2S and to use the
//following MCLK frequency:
//@32k-48k use MCLK=256fs (~12MHz range)
//@88.2k-96k use MCLK=245fs (~24MHz range)
//@176.4-192k use MCLK=128gs (~24MHz range)
HRESULT akm4620_msgFunc (CODEC_MSG msg, uint32 data0, uint32 data1)
{
switch (msg)
{
case MM_LOST_LOCK:
targetWriteCodecSPIWord (0xa100); //reset AKM codec, this will also mute
break;
case MM_GOT_LOCK:
//some codec's might need the I2S setup to change when the mode changes
//that is not the case with our AKM4620 as we always run 512 base rate.
targetWriteCodecSPIWord (0xa100); //reset
switch (data0)
{
default:
case eDAL_RATE_MODE_LOW:
targetWriteCodecSPIWord (0xa264);
break;
case eDAL_RATE_MODE_MID:
targetWriteCodecSPIWord (0xa265);
break;
case eDAL_RATE_MODE_HIGH:
targetWriteCodecSPIWord (0xa266);
break;
}
targetWriteCodecSPIWord (0xa103); //un-reset
break;
}
return NO_ERROR;
}
static void uiFSMdo (void)
{
int delta;
uint8 chg=0;
if (displayClicked ())
{
//toggle mute
evmCfg.mute = !evmCfg.mute;
chg=1;
}
delta = displayEncoderDelta ();
if (delta)
{
//if muted, exit mute
if (evmCfg.mute)
{
evmCfg.mute = 0;
chg=1;
}
delta += evmCfg.hpgain;
if (delta < 0) delta=0;
if (delta > 38) delta=38;
if (delta != evmCfg.hpgain)
{
evmCfg.hpgain = delta;
chg=1;
}
}
if (chg)
{
updateUI();
//tell CODEC
targetWriteCodecSPIWord (0xa600 | DAC_GAIN);
targetWriteCodecSPIWord (0xa700 | DAC_GAIN);
spsChanged(); //schedule update of flash
}
}
// updateCodec is called whenever DAL tells us that things have changed.
// The function checks if any important stuff changed such as the rateMode
// or the locked state.
// We also handle some appliction specific LED stuff here.
static void updateCodec(DAL_STATUS * pStatus)
{
uint16 w;
if (((pStatus->state == eDAL_STATE_LOCKED) && !isLocked) || ((pStatus->state == eDAL_STATE_LOCKED) && (pStatus->lockedRateMode != lastLockedMode)))
{
//So either we became locked, or we slid into a new rate mode, in all cases
//the codec/ADC/DAC should be told.
if (firstInit)
{
//we got clocks, bring the device out of RESET
amCtrlSetBit(LED_CODEC_NRST);
TCTaskWait(10); //needs a little time??
firstInit=FALSE;
}
//Call the codec function for the selected mode
targetWriteCodecSPIWord (0xa100); //reset
switch (pStatus->lockedRateMode)
{
default:
case eDAL_RATE_MODE_LOW:
w=0xa264;
break;
case eDAL_RATE_MODE_MID:
w=0xa265;
break;
case eDAL_RATE_MODE_HIGH:
w=0xa266;
break;
}
targetWriteCodecSPIWord (w);
targetWriteCodecSPIWord (0xa600 | DAC_GAIN);
targetWriteCodecSPIWord (0xa700 | DAC_GAIN);
targetWriteCodecSPIWord (0xa103); //un-reset
isLocked = true;
lastLockedMode = pStatus->lockedRateMode;
}
else if ((pStatus->state != eDAL_STATE_LOCKED) && isLocked)
{
//we just lost lock
//Call the codec function for the selected mode
targetWriteCodecSPIWord (0xa100); //reset AKM codec, this will also mute
isLocked = false;
}
}
