public void SetInputFile(string fileName, Channel channel = Channel.Left, int repeat = 1)
{
switch (channel)
{
case Channel.Left:
{
if (decoderLeft == null)
{
decoderLeft = new PCMDecoder(16, 16000, 1, false, this);
}
for (var i = 0; i < repeat; i++)
{
decoderLeft.LoadFile(fileName);
}
inputFileLeft = fileName;
}
break;
case Channel.Right:
{
if (decoderRight == null)
{
decoderRight = new PCMDecoder(16, 16000, 1, false, this);
}
for (var i = 0; i < repeat; i++)
{
decoderRight.LoadFile(fileName);
}
inputFileRight = fileName;
}
break;
}
}
private void Start()
{
if (enableTx.Value)
{
if (OutputFile == "")
{
this.Log(LogLevel.Error, "Starting transmission without an output file!");
return;
}
encoder = new PCMEncoder(sampleWidth, sampleFrequency, numberOfChannels, false);
encoder.SetBufferingBySamplesCount(maxSamplesCount.Value);
encoder.Output = OutputFile;
}
if (enableRx.Value)
{
if (InputFile == "")
{
this.Log(LogLevel.Error, "Starting reception without an input file!");
return;
}
decoder = new PCMDecoder(sampleWidth, sampleFrequency, numberOfChannels, false, this);
decoder.LoadFile(InputFile);
}
StartRxTxThread();
}
private void StartRx()
{
// All three flags must be set to start the acquisition, as they are stored in 3 separate registers this function will be called two times before we are ready to start
if (rxEnabled.Value == false || slaveEnabled.Value == false || slaveClockEnabled.Value == false)
{
this.Log(LogLevel.Debug,
@"Reception has not been started - it needs I2S_RX_CFG.ENABLE, I2S_SLV_SETUP.SLAVE_EN and I2S_CLKCFG_SETUP.SLAVE_CLK_EN to be set.
Current state: I2S_RX_CFG.ENABLE = {0},
I2S_SLV_SETUP.SLAVE_EN = {1},
I2S_CLKCFG_SETUP.SLAVE_CLK_EN = {2}",
rxEnabled.Value, slaveEnabled.Value, slaveClockEnabled.Value);
return;
}
if (InputFile == "")
{
this.Log(LogLevel.Error, "Starting reception without an input file! Aborting");
return;
}
decoder = new PCMDecoder(rxSampleWidth, RxSampleFrequency, rxChannels, false, this);
decoder.LoadFile(InputFile);
this.Log(LogLevel.Debug, "Starting reception");
if (rxContinuous.Value)
{
if (RxSampleFrequency == 0)
{
this.Log(LogLevel.Error, "Sampling frequency not set. Aborting continuous reception");
return;
}
rxThread = machine.ObtainManagedThread(InputFrames, (int)RxSampleFrequency);
rxThread.Start();
}
else
{
InputFrames();
}
}
public LiteX_I2S_Slave(Machine machine, DataFormat format, uint sampleWidthBits, uint samplingRateHz, uint numberOfChannels) : base(machine, format, sampleWidthBits, samplingRateHz)
{
decoder = new PCMDecoder(sampleWidthBits, samplingRateHz, numberOfChannels, false, this);
SamplesPushFrequency = 100;
}
