private bool WaitAck()
{
for (int loop = 0; loop < 10; loop++)
{
Thread.Sleep(5);
if (I2CDevice.I2CDeviceAck(BusID))
{
return(true);
}
}
return(false);
}
public bool OpenTuner()
{
if (DeviceTypeDisabled)
{
return(false);
}
if (!I2cDevice.I2CDeviceAck(BusID))
{
return(false);
}
byte[] buffer = new byte[32];
if (!I2cDevice.I2CWriteByte(BusID, 211))
{
return(false);
}
if (!I2cDevice.I2CReadBytes(BusID, buffer))
{
return(false);
}
byte[] wordBuffer = new byte[4];
/* read PFD - 4 byte LSB first */
if (!I2cDevice.I2CWriteByte(BusID, 215))
{
return(false);
}
if (!I2cDevice.I2CReadBytes(BusID, wordBuffer))
{
return(false);
}
PFD = (wordBuffer[3] << 24) | (wordBuffer[2] << 16) | (wordBuffer[1] << 8) | wordBuffer[0];
/* read Modulus - 1 byte */
if (!I2cDevice.I2CWriteByte(BusID, 217))
{
return(false);
}
if (!I2cDevice.I2CReadByte(BusID, wordBuffer))
{
return(false);
}
Modulus = wordBuffer[0];
/* enable LNA */
if (!I2cDevice.I2CWriteByte(BusID, 229))
{
return(false);
}
/* disable ATT */
if (!I2cDevice.I2CWriteBytes(BusID, new byte[] { 231, 0 }))
{
return(false);
}
if (PFD == 0)
{
PFD = 20000000;
}
if (Modulus == 0)
{
Modulus = 40;
}
long oldFreq = GetStartupFrequency();
Init();
SetFrequency(oldFreq);
return(true);
}
