Function

Calculate the position (byte address and bit mask) from the bit index in a bitmap

Purpose

E.g., to find the position of the given Node in the bitmap of Nodes

Syntax

uns8 addressBitmap(uns8 bitIndex)

Parameters

bitIndex: Numerical order (position) in a bitmap (0 to 255).

                  Typically used for the index of the given Node (1 to 239).

Return value

The same as bitmapBitMask

Output values

•     bitmapByteIndex:    Address of the byte in the bitmap, i.e. (bitIndex / 8)

•     bitmapBitMask:        Bit mask value of the given position in the bitmap,

                  i.e. (1 << (bitIndex % 8))

Preconditions

  –

Remarks

  –

Side effects

  –

See also

  –

Example

addressBitmap(100);

// bitmapByteIndex = 12

// Return value = bitmapBitMask = 10h = 0b0001.0000