def build_twiddle_factors_128_dot_vhdl():

	with open("twiddle_factors_128.vhd", "w") as text_file:

		text_file.write("library IEEE;\n")
		text_file.write("use IEEE.numeric_std.all;\n")
		text_file.write("use IEEE.std_logic_1164.all;\n\n")

		text_file.write("package twiddle_factors_128 is\n\n")

		text_file.write("constant Coef_SZ    :   integer := 16;\n")
		text_file.write("constant NB_Coeffs  :   integer := 128;\n\n")

		text_file.write("--============================================================\n")
		text_file.write("--      create each initial values for each coefs ============\n")
		text_file.write("--!!!!!!!!!!It should be interfaced with a software !!!!!!!!!!\n")
		text_file.write("--============================================================\n\n")

		for i in range(128):
			text_file.write("constant c_{}    : std_logic_vector(Coef_SZ-1 downto 0) := std_logic_vector(TO_SIGNED(121,Coef_SZ));\n".format(i))
	
		text_file.write("\n--************************************************--\n\n")
		
		for i in range(128):
			text_file.write("constant cps_{}  : std_logic_vector(Coef_SZ-1 downto 0) := std_logic_vector(TO_SIGNED(160,Coef_SZ));\n".format(i))
	
		text_file.write("\n--************************************************--\n\n")
	
		for i in range(128):
			text_file.write("constant cms_{}  : std_logic_vector(Coef_SZ-1 downto 0) := std_logic_vector(TO_SIGNED(82,Coef_SZ));\n".format(i))

		text_file.write("\n--************************************************--\n\n")

		range_j = 16
		range_i = 8

		text_file.write("constant twiddleFactors_c  :   std_logic_vector( (NB_Coeffs * Coef_SZ)-1 downto 0) :=\n")
		text_file.write("(")
		for j in range(16):
			text_file.write("\n")
			for i in range(8):
				if (i+j*range_i) == (range_j*range_i-1):
					text_file.write("c_{} );\n\n".format(i+j*range_i))
				else:
					text_file.write("c_{}  & ".format(i+j*range_i))

		text_file.write("constant twiddleFactors_cps  :   std_logic_vector( (NB_Coeffs * Coef_SZ)-1 downto 0) :=\n")
		text_file.write("(")
		for j in range(16):
			text_file.write("\n")
			for i in range(8):
				if (i+j*range_i) == (range_j*range_i-1):
					text_file.write("cps_{} );\n\n".format(i+j*range_i))
				else:
					text_file.write("cps_{}  & ".format(i+j*range_i))

		text_file.write("constant twiddleFactors_cms  :   std_logic_vector( (NB_Coeffs * Coef_SZ)-1 downto 0) :=\n")
		text_file.write("(")
		for j in range(16):
			text_file.write("\n")
			for i in range(8):
				if (i+j*range_i) == (range_j*range_i-1):
					text_file.write("cms_{} );\n".format(i+j*range_i))
				else:
					text_file.write("cms_{}  & ".format(i+j*range_i))

		text_file.write("end;\n\n")

if __name__ == '__main__':
	build_twiddle_factors_128_dot_vhdl()
	print'file built'