Example Documentation

PACKAGE math_pack IS

This package provides basic mathematic functions utilised all through the design

FUNCTION log2 RETURNS integer

This function calculates the base 2 logarithm of a number.

Parameters

Parameter	Type	Mode	Description
a	unsigned	in	The number of which to calculate the logarithm

ENTITY counter IS

This is a simple counter entity that counts the amount of passed input clock cycles up to max_value.

Generics

Generic	Type	Default	Description
max_value	integer	16	Determines how many clock cycles must pass before the buffer overflowing.

Ports

Port	Type	Mode	Description
IN_EN	std_logic	in	The input clock
OUT_EN	std_logic_vector(log2(max_value) - 1 downto 0)	out	The output signal

Constants

Constant	Type	Value	Description
CNT_WIDTH	natural	8	Width of counter
DATA_WIDTH	natural	8	Width of data stream