/// <summary>
/// Scan for devices on the I2C bus and populate the internal list. By default,
/// the standard speed (100KHz) and shared bus mode is used
/// </summary>
/// <param name="startAddr">The I2C address to start scanning</param>
/// <param name="endAddr">The I2C address to end scanning</param>
/// <returns>Total devices found on the bus</returns>
public int ScanDevicesOnBus(int startAddr, int endAddr)
{
if (startAddr < 0 || startAddr > 127 || startAddr > endAddr || endAddr > 127)
{
throw new ArgumentException("Invalid I2C address range");
}
byte[] tempBuffer = new byte[8]; //why 8??
I2cDevice device = null;
I2cTransferStatus xferStatus = I2cTransferStatus.FullTransfer;
for (int addr = startAddr; addr <= endAddr; addr++)
{
device = I2cDevice.FromId(_deviceSelector, new I2cConnectionSettings(addr)
{
BusSpeed = I2cBusSpeed.StandardMode, SharingMode = I2cSharingMode.Shared
});
xferStatus = device.ReadPartial(tempBuffer).Status;
if (xferStatus == I2cTransferStatus.FullTransfer || xferStatus == I2cTransferStatus.PartialTransfer)
{
//we have a device...
_i2CDevices.Add(addr, device);
}
}
return(_i2CDevices.Count);
}
private static string DisplayStatus(I2cTransferStatus resStatus)
{
string str = "";
switch (resStatus)
{
case I2cTransferStatus.FullTransfer:
str = "FullTransfert";
break;
case I2cTransferStatus.PartialTransfer:
str = "PartialTransfer";
break;
case I2cTransferStatus.SlaveAddressNotAcknowledged:
str = "Slave NACK";
break;
}
return(str);
}
public I2CTransferException(string message, I2cTransferStatus transferStatus, Exception inner)
: base(message, inner)
{
}
public I2CTransferException(string message, I2cTransferStatus transferStatus)
: base(message)
{
}
public I2CTransferException(I2cTransferStatus transferStatus)
{
}
internal I2cTransferResult(I2cTransferStatus status, int bytesWritten, int bytesRead)
{
this.Status = status;
this.BytesWritten = bytesWritten;
this.BytesRead = bytesRead;
}
