public bool SetFilter(int index)
{
if (index < 0 || index > 98)
{
return(false);
}
byte[] cmd = new byte[2];
byte[] buf = new byte[9];
cmd[0] = (byte)(0x65 + index);
cmd[1] = 1;
lock (Lock)
{
if (!I2CDevice.I2CWriteBytes(BusID, cmd))
{
return(false);
}
/* make sure the atmel is done */
WaitMs(SetFilterDelay);
if (!I2CDevice.I2CReadBytes(BusID, buf))
{
return(false);
}
}
this.FilterClock = buf[5] + buf[6] * 0x100 + buf[7] * 0x10000 + buf[8] * 0x1000000;
this.FilterWidth = buf[1] + buf[2] * 0x100 + buf[3] * 0x10000 + buf[4] * 0x1000000;
return(true);
}
public bool AutodetectAddressing()
{
byte[] buffer = new byte[3];
byte[] backup8 = new byte[2];
byte[] backup16 = new byte[1];
/* first backup data at 0x00 and 0x01 */
/* transmit read address */
if (!I2CDevice.I2CWriteBytes(BusID, new byte[] { (byte)0 }))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to read header in 8 bit mode.");
return(false);
}
Thread.Sleep(10);
/* read data */
if (!I2CDevice.I2CReadBytes(BusID, backup8))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to receive header in 8 bit mode.");
return(false);
}
/* first backup data at 0x00 for 16 bit eeproms */
/* transmit read address */
if (!I2CDevice.I2CWriteBytes(BusID, new byte[] { (byte)0, (byte)0 }))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to read header in 16 bit mode.");
return(false);
}
Thread.Sleep(10);
/* read data */
if (!I2CDevice.I2CReadBytes(BusID, backup16))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to receive header in 16 bit mode.");
return(false);
}
/* write the test word */
buffer[0] = (byte)0;
buffer[1] = (byte)0;
buffer[2] = (byte)0xAA;
if (!I2CDevice.I2CWriteBytes(BusID, buffer))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to write test header in 16 bit mode.");
return(false);
}
Thread.Sleep(10);
/* read back what was placed in EEPROM */
if (!I2CDevice.I2CWriteBytes(BusID, new byte[] { (byte)0 }))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to read test header in 8 bit mode.");
return(false);
}
Thread.Sleep(10);
if (!I2CDevice.I2CReadBytes(BusID, buffer))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to receive test header in 8 bit mode.");
return(false);
}
/* the second 0x00 upon address write got interpreted as data - its a 8 bit eeprom */
if (buffer[0] == 0x00 && buffer[1] == 0xAA)
{
Use16Bit = false;
/* addressig is determined now, write back backed up data. may be crap if the eeprom is 16 bit wide. */
WriteBytes(0, backup8);
return(true);
}
/* read back what was placed in EEPROM, but use 16 bit addressing */
if (!I2CDevice.I2CWriteBytes(BusID, new byte[] { (byte)0, (byte)0 }))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to read test header in 16 bit mode.");
return(false);
}
Thread.Sleep(10);
if (!I2CDevice.I2CReadBytes(BusID, buffer))
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Failed to receive test header in 16 bit mode.");
return(false);
}
if (buffer[0] == 0xAA)
{
Use16Bit = true;
/* addressig is determined now, write back backed up data. */
WriteBytes(0, backup16);
}
else
{
Log.AddMessage("EEPROM:AutodetectAddressing(): Inexpected result when reading in 16 bit mode: 0x" + buffer[0].ToString("X2"));
return(false);
}
return(true);
}
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);
}
