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====== Code für CPLD1 ======

===== Erläuterungen =====

^ Varable  ^  Constante  ^^
| s(t) = "1ms-Takte"\\ t = Trafoindex Laufvariabel\\ r = Reihe/Spalte d. Anzeige Laufvariabel\\ m = Laufvariable Stelle im Bitstring stroke\\ \\ **trafosignals[5..0]** Bitstring[5..0] (<color green>RRR</color><color red>T</color><color green>P</color>) (<color #DDDD55>K</color>)\\ **Stroke[4..0]** = Bitstring[4..0] Eingangsvariable 1ms-Takt\\ **Mode[2..0]** = Bitstring Mode[1..0] Eingangsvariable ^ c_num_trafos | = Trafoanzahl = 8  |
| ::: ^ c_stroke_wl | = Länge Bitstring[4..0] = 5 |
| ::: ^  |   | 
| ::: ^ c_mode_wl | = Länge Bitstring Mode[1..0] = 3  |
| ::: ^  |   |
| ::: ^ c_measurement_range_wl  | = Länge Bitstring der Balkenanzeige = 6 (5xRb + P) |
| ::: ^ c_num_measurement_ranges  | = Anzahl Messbereich als Integerzahl = 3  |
| ::: ^ c_knob_select_wl  | = Länge Dekoder Bitstring[1..0] = 2  |
| ::: ^ c_cpld1_period_wl  | = Länge Perioden Bitstring[5..0] = 50  |(
| p_drive_led_rows: Prozess LED-Treiber  |||

===== Code Orginal =====

<code vhdl>
--------------------------------------------------------------------------------
-- Copyright 2023
-- GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
-- Planckstr. 1, 64291 Darmstadt
-- Author: Rene Geissler, r.geissler@gsi.de
--------------------------------------------------------------------------------
--
-- functional description
--     TODO
--
--------------------------------------------------------------------------------
-- VHDL standard: VHDL-2002
--------------------------------------------------------------------------------

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

use work.constant_package.all;
use work.type_package.all;

entity cpld_1 is
	port(
		--clk_0p001      : in  std_logic;
		--clk_10         : in  std_logic;
		--clk_10_n       : in  std_logic;
		trafo_signals  : in  t_trafo_signals;
		stroke         : in  std_logic_vector(c_stroke_wl - 1 downto 0);
		period_counter : in  std_logic_vector(c_cpld1_period_wl - 1 downto 0);
		knob_select    : in  std_logic_vector(c_knob_select_wl - 1 downto 0);
		display_mode   : in  std_logic_vector(c_mode_wl - 1 downto 0);
		decode_signal  : in  std_logic;
		led_rows_red   : out std_logic_vector(c_num_trafos - 1 downto 0);
		led_rows_green : out std_logic_vector(c_num_trafos - 1 downto 0)
	);
end cpld_1;

architecture behavioral of cpld_1 is

	signal mode : unsigned(c_mode_wl - 1 downto 0);

begin

	mode <= unsigned(display_mode);

	-- only modes 0 and 1 are implemented yet
	p_drive_led_rows : process(stroke, trafo_signals, mode)
		variable s : integer;
		variable r : integer;
	begin
		led_rows_red   <= (others => '0');
		led_rows_green <= (others => '0');
		s              := to_integer(unsigned(stroke)); -- 1ms stroke index in 20 ms UNILAC cycle (range 0 to 19)
		for t in 0 to c_num_trafos - 1 loop
			-- common to modes 0 and 1
			if mode <= to_unsigned(1, c_mode_wl) then
                                -- Acht waagrechte Balken mehr oder weniger ausgesteuert!
				r := to_integer(unsigned(trafo_signals(t)(c_measurement_range_wl - 1 downto 0))); -- measurement range (range 1 to 5)
				for m in 0 to c_num_measurement_ranges - 1 loop
					if s = m or s = 6 + m then
						-- mode 0
						if mode = to_unsigned(0, c_mode_wl) then
							if r >= m + 1 then
								led_rows_green(t) <= '1'; -- display measurement ranges in cycles 0 .. 4 and 6 .. 10
							end if;
						-- mode 1
						else
							if m < c_num_measurement_ranges - 1 then -- falsch: c_measurement_range_wl
								led_rows_green(t) <= trafo_signals(t)(m); -- display binary measurement ranges in cycles 0 .. 2 and 6 .. 8
							end if;
						end if;
					end if;
				end loop;
				if s = 5 or s = 6 + 5 then
					led_rows_green(t) <= trafo_signals(t)(4); -- display trafo present signal in cycles 5 and 11
                                      --led_rows_red(t) <= trafo_signals(t)(3); (Testfunktion)
				end if;
			end if;
		end loop;
	end process;

end behavioral;

</code>

----
☚ [[projects:maps21:s:dcont:code:code|CPLD1]] ★