Thomas Rankin

public class Program
    {
        static OutputPort owPort = new OutputPort(Pins.GPIO_PIN_D0, false);
        static OneWire DS1821 = new OneWire(owPort);

        public static void Main()
        {

            lcdDisplay.Clear();
         
            while (true)
            {
                string tmp = GetTemperature().ToString("F2");
                lcdDisplay.SetCursorPosition(0, 0);
                lcdDisplay.Write(tmp);
                Thread.Sleep(100);
            }

        }

        public static float GetTemperature()
        {
            ushort temp_read = 0;
            ushort count_remain = 0;
            ushort count_per_c = 0;
            ushort configuration_register = 0;
            ushort whileCount = 0;

            // One -Shot Convert Temp
            DS1821.TouchReset();
            DS1821.WriteByte(0xEE);

            // Loop and sleep a bit until it is done converting the Temperature data.
            do
            {
                Thread.Sleep(10);

                configuration_register = 0;
                DS1821.TouchReset();
                DS1821.WriteByte(0xAC);

                // Read the configuration Register from the DS1821
                configuration_register = ReadBytes(1);
                whileCount++;

            } while (((configuration_register & (1 << 7)) == 0) && whileCount < 100); // If Bit #8 is 1 then we are finished converting the temp

            if (whileCount >= 100) return -1;
            // Get Temp
            DS1821.TouchReset();
            DS1821.WriteByte(0xAA);
            temp_read = ReadBytes(1); ;

            // Get Count Remaining
            DS1821.TouchReset();
            DS1821.WriteByte(0xA0);
            count_remain = ReadBytes(2);

            // Load The Counter to populate the slope accumulator
            DS1821.TouchReset();
            DS1821.WriteByte(0x41);

            // Read Count Per Deg
            DS1821.TouchReset();
            DS1821.WriteByte(0xA0);
            count_per_c = ReadBytes(2);

            // If we are reading above the 200 mark then we are below 0 and need to compensate the calculation
            if (temp_read >= 200) temp_read -= 256;

            var highResTemp = (float)temp_read - .5 + (((float)count_per_c - (float)count_remain) / (float)count_per_c);

            return (float)((1.80 * highResTemp) + 32.00);

        }

        static ushort ReadBytes(ushort count)
        {
            ushort val = 0;
            for (ushort i = 0; i < count; i++)
            {
                val |= (ushort)(DS1821.ReadByte() << i * 8);
            }
            return val;
        }


    }