Entity: cordicAtan

• File: cordicAtan.vhd

Diagram

Generics

Generic name	Type	Value	Description
NB_ITER	natural	25
DATA_IN_SIZE	natural	32
DATA_OUT_SIZE	natural	28
PI_VALUE	natural	52707179	M_PI * 2**(NB_ITER-1)

Ports

Port name	Direction	Type	Description
data_en_i	in	std_logic	input data
data_i_i	in	std_logic_vector(DATA_IN_SIZE-1 downto 0)
data_q_i	in	std_logic_vector(DATA_IN_SIZE-1 downto 0)
data_clk_i	in	std_logic
data_rst_i	in	std_logic
atan_o	out	std_logic_vector(DATA_OUT_SIZE-1 downto 0)	output
atan_en_o	out	std_logic
atan_clk_o	out	std_logic
atan_rst_o	out	std_logic

Signals

Name	Type	Description
data_i_in_s	std_logic_vector(RESIZE_DATA_SIZE-1 downto 0)
data_q_in_s	std_logic_vector(RESIZE_DATA_SIZE-1 downto 0)
data_en_in_s	std_logic
data_i_s	data_tab(NB_ITER downto 0)
data_q_s	data_tab(NB_ITER downto 0)
data_en_s	std_logic_vector(NB_ITER downto 0)
atan_s	atan_tab(NB_ITER downto 0)
sign_s	sign_tab(NB_ITER downto 0)
sign_tmp_s	std_logic_vector(3 downto 0)
atan_corr_s	std_logic_vector(ALPHA_SIZE-1 downto 0)
atan_fin_s	std_logic_vector(ALPHA_SIZE-1 downto 0)
data_en_fin_s	std_logic

Constants

Name	Type	Value	Description
ATAN_SIZE	natural	NB_ITER-1
SHIFT_FACTOR	natural	NB_ITER-1
RESIZE_DATA_SIZE	natural	2+DATA_IN_SIZE+SHIFT_FACTOR
ALPHA_SIZE	natural	ATAN_SIZE+4
pi_resize_s	std_logic_vector(ALPHA_SIZE -1 downto 0)	std_logic_vector(to_signed(PI_VALUE, ALPHA_SIZE))

Types

Name	Type	Description
atan_tab	array (natural range <>) of std_logic_vector(ALPHA_SIZE-1 downto 0)
data_tab	array (natural range <>) of std_logic_vector(RESIZE_DATA_SIZE-1 downto 0)
sign_tab	array (natural range <>) of std_logic_vector(3 downto 0)

Processes

• unnamed: ( data_clk_i )

• unnamed: ( sign_tmp_s, atan_s )

• unnamed: ( data_clk_i )