static void myAppCreateHighRateDAL(void)
{
cliPrintf("high rate dal.\n\r");
if(PreviousDAL)
dalUninstallCallback(myDalCallBack);
//Let's build our audio configuration with "dal", We want to allow all rates above 96KHz
dalCreateInterface(eDAL_INTERFACE_1, eDAL_RATE_MODE_HIGH, MY_INPUT_DEVICES_HIGH, MY_OUTPUT_DEVICES_HIGH);
//default we will run at internal rate 48KHz, the computer will change that when attached
dalSetClockSource (eDAL_INTERFACE_1, eDAL_CLK_SRC_AVS_SYT1, eDAL_NOMINAL_RATE_192);
//we need to setup our routing
//let the 4 AES channels take data from the first Isoc receiver
dalSetRoute(eDAL_INTERFACE_1, TX_AES_CH0_3, RX_AVS1_CH0_3);
//let the first 8 Isoc 1 transmitter channels take data from the 8 AES channels
dalSetRoute(eDAL_INTERFACE_1, TX_AVS1_CH0_3, RX_AES_CH0_3);
//the call back function defined above needs to be installed into "dal"
dalInstallCallback(&myDalSubscribedEvents, 200, myDalCallBack, 0);
//configure device for MIDI based on a function in targetBoard. For the EVAL
//board this is determined by DIP SW 1
myAvcDriverTxConfigLow[0].midiChannels = 1;
myAvcDriverRxConfigLow[0].midiChannels = 1;
avcDriverConfigure (myAvcDriverTxConfigLow, MY_NB_TX_ISOC_STREAMS_HIGH,
myAvcDriverRxConfigLow, MY_NB_RX_ISOC_STREAMS_HIGH,
myAvcDriverCallBack);
myAppInitializeI2S();
myAppSetI2SHigh();
// now we are ready to start the whole thing, it actually wont start until we return from
// this function as threads are not enabled yet. If we want to have some code running after
// this we need to create a thread. We don't need that here, our call backs will do things
// for us.
dalStartInterface(eDAL_INTERFACE_1);
}
// This function handles the rate change request from the driver.
// If the rate mode has changed it will create a new DAL.
static HRESULT myAppChangeSR(DICE_DRIVER_CB_DATA * pData)
{
HRESULT hResult = NO_ERROR;
uint32 notify = 0;
DAL_RATE_MODE_ENUM driverRateMode;
driverRateMode = dalRateByID(pData->rate)->rateMode;
if (driverRateMode != lastDriverRatemode)
{
//Driver asked for a change of rate mode
lastDriverRatemode = driverRateMode;
myAppCreateDAL(driverRateMode);
// Send the RX and TX Configuration Notification as this might
// have resulted in a change of the Rx and Tx streams going
// to the computer. This will for example happen if the device
// has ADAT, when going from 48k to 96k ADAT will be reduced
// to 4 channels (SMUXII)
notify |= DD_NOTIFY_RX_CFG_CHG_BIT | DD_NOTIFY_TX_CFG_CHG_BIT;
}
//Change the Clock as instructed by driver, this could be a change
//in clock source, nominal rate or both.
dalSetClockSource (eDAL_INTERFACE_1, pData->source, pData->rate);
//Send the Clock Setting Accept Notification, this should always be send
notify |= DD_NOTIFY_CLOCK_ACP;
diceDriverNotifyHost(notify);
return hResult;
}
void StandAloneInitialize (void)
{
//we need to figure out what dal to create
EAP_STND_ALONE_CFG const * pStdaCfg;
DAL_RATE_MODE_ENUM rate_mode = eDAL_RATE_MODE_LOW_MID;
DAL_NOMINAL_RATE_ENUM rate = eDAL_NOMINAL_RATE_ANY;
DAL_CLOCK_SOURCE_ENUM clksrc;
pStdaCfg = eapGetStandaloneCfg();
clksrc = CLOCK_SOURCE[pStdaCfg->clkSrc];
if (clksrc == eDAL_CLK_SRC_AESRX0)
{
rate_mode = eDAL_RATE_MODE_ALL; //auto lock to 32k-192k
}
else
{
//illegal, do something
rate = eDAL_NOMINAL_RATE_48;
}
dalCreateInterface(eDAL_INTERFACE_1, rate_mode, STDA_INPUT_DEVICES,STDA_OUTPUT_DEVICES);
dalSetClockSource (eDAL_INTERFACE_1, clksrc, rate);
dalStartInterface(eDAL_INTERFACE_1);
//update the routing now according to the currently locked rate mode, in auto modes this might change
//so in that case this function must be called.
updateStdaRouting();
}
static HRESULT myAppChangeSR(AVC_DRIVER_CB_DATA * pData)
{
HRESULT hResult = NO_ERROR;
uint32 notify = 0;
cliPrintf("Change SR: old=%x, new=%x\n\r", OldRate, pData->rate);
switch(pData->rate)
{
case eDAL_NOMINAL_RATE_32:
case eDAL_NOMINAL_RATE_44_1:
case eDAL_NOMINAL_RATE_48:
if(OldRate > eDAL_NOMINAL_RATE_48)
{
cliPrintf(" low rate\n\r");
myAppCreateLowRateDAL();
//Send the RX and TX Configuration Notification
notify |= DD_NOTIFY_RX_CFG_CHG_BIT | DD_NOTIFY_TX_CFG_CHG_BIT;
}
break;
case eDAL_NOMINAL_RATE_88_2:
case eDAL_NOMINAL_RATE_96:
if((OldRate < eDAL_NOMINAL_RATE_88_2) || (OldRate > eDAL_NOMINAL_RATE_96))
{
myAppCreateMidRateDAL();
//Send the RX and TX Configuration Notification
notify |= DD_NOTIFY_RX_CFG_CHG_BIT | DD_NOTIFY_TX_CFG_CHG_BIT;
}
break;
case eDAL_NOMINAL_RATE_176_4:
case eDAL_NOMINAL_RATE_192:
if(OldRate < eDAL_NOMINAL_RATE_176_4)
{
myAppCreateHighRateDAL();
//Send the RX and TX Configuration Notification
notify |= DD_NOTIFY_RX_CFG_CHG_BIT | DD_NOTIFY_TX_CFG_CHG_BIT;
}
break;
default:
cliPrintf("No change.\n\r");
break;
}
OldRate = pData->rate;
if(hResult == NO_ERROR)
{
//Change the Clock Now
dalSetClockSource (eDAL_INTERFACE_1, pData->source, pData->rate);
//Send the Clock Setting Accept Notification
notify |= DD_NOTIFY_CLOCK_ACP;
OldRate = pData->rate;
}
return hResult;
}
HRESULT myAvcDriverCallBack (AVC_DRIVER_MSG_ENUM msg, AVC_DRIVER_CB_DATA * pData)
{
uint32 notify;
// why did the driver call us?
switch (msg)
{
case eAVCDR_MSG_CLOCK_CHG:
// The computer has requested a change of clock and source. We
// should honour that by issuing a call to "dal"
//Check if DAL needs to be changed
notify = myAppChangeSR(pData);
//Change the Clock Now
dalSetClockSource (eDAL_INTERFACE_1, pData->source, pData->rate);
break;
case eAVCDR_MSG_ATTACH:
// The computer attached itself to this device
// this typically happens after the computer boots, but also after
// bus resets or the first time the driver is installed
// In this application we don't care
LED_ON(DRIVER_ATCH_LED_ID);
break;
case eAVCDR_MSG_DETACH:
// The computer detached itself from this device
// this typically happens when the computer shuts down
// or at a bus reset.
// In this application we don't care
LED_OFF(DRIVER_ATCH_LED_ID);
break;
case eAVCDR_MSG_ENABLE:
// The computer has enabled streaming
LED_ON(DRIVER_EN_LED_ID);
break;
case eAVCDR_MSG_DISABLE:
// The computer has disabled streaming
LED_OFF(DRIVER_EN_LED_ID);
break;
}
return NO_ERROR;
}
static HRESULT myAppChangeSR(DICE_DRIVER_CB_DATA * pData)
{
HRESULT hResult = NO_ERROR;
uint32 notify = 0;
if (dalRateByID (pData->rate)->rateMode != lastDriverRateMode)
{
lastDriverRateMode = dalRateByID (pData->rate)->rateMode;
dalCreateInterface(eDAL_INTERFACE_1, lastDriverRateMode, INPUT_DEVICES,OUTPUT_DEVICES);
eapDriverChangeRateMode (lastDriverRateMode);
dalStartInterface(eDAL_INTERFACE_1);
//Send the RX and TX Configuration Notification
notify |= DD_NOTIFY_RX_CFG_CHG_BIT | DD_NOTIFY_TX_CFG_CHG_BIT;
}
//Change the Clock Now
dalSetClockSource (eDAL_INTERFACE_1, pData->source, pData->rate);
//Send the Clock Setting Accept Notification
notify |= DD_NOTIFY_CLOCK_ACP;
diceDriverNotifyHost(notify);
return hResult;
}
