laurens

Hello, i am trying to convert a byte array with 4 bytes in it to a float

Since you can't use system.bitconvert.ToSingle() in netduino i tried to make a similar method but without success
these are the following methods i used:

        public static float ToFloat(byte[] buffer)
        {
            return (float)(buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3]);
        }

        public static double ToFloat1(byte[] value)
        {
            return (
                value[0] << 0 |
                value[1] << 8 |
                value[2] << 16 |
                value[3] << 24);
        }

        public static unsafe float ToFloat2(byte[] buffer)
        {
            float test = 0;
            fixed (byte* pBuffer = buffer)
            {
                test = *((float*)pBuffer);
            }
            return test;
        }

        public static unsafe float ToFloat3(ref byte[] buffer)
        {
            uint value = Utility.ExtractValueFromArray(buffer, 0, 4);
            return *((float*)&value);

        }

        public static unsafe float ToFloat4(byte[] value)
        {
            int i = (int)Utility.ExtractValueFromArray(value, 0,4);
            return *(((float*)&i));
        }

I tried the following values:
byte[] buffer = new Byte[4]:
buffer[0] = 118;
buffer[1] = 36;
buffer[2] = 27;
buffer[3] = 193;
float test = System.BitConverter.ToSingle(buffer, 0);

This gives -9,696402 if i use this in a plain C# console project.
I also tried to parse string to a double but this method isn't implemented yet.
Basically I need to transfer a rational number from an arduino to a netduino using a serial connection.
I already programmed the arduino to send the floats as an array of 4 bytes which i then read into a buffer on the netduino.
I checked the bytes in the buffer and they forming the correct number using System.BitConverter.ToSingle(buffer, 0); in a C# console.

Feel free to to make suggestions or
Thanks in advance