comscope.vhd

pcmcia代码驱动等有用资料

	TRIGGER_8_BIT_1: in std_logic_vector(7 downto 0);
	TRIGGER_8_BIT_SAMPLE_CLK_1: in std_logic;
	TRIGGER_8_BIT_2: in std_logic_vector(7 downto 0);
	TRIGGER_8_BIT_SAMPLE_CLK_2: in std_logic;
	TRIGGER_8_BIT_3: in std_logic_vector(7 downto 0);
	TRIGGER_8_BIT_SAMPLE_CLK_3: in std_logic;
	TRIGGER_8_BIT_4: in std_logic_vector(7 downto 0);
	TRIGGER_8_BIT_SAMPLE_CLK_4: in std_logic;

	-- 16-bit Triggers
	TRIGGER_16_BIT_1: in std_logic_vector(15 downto 0);
	TRIGGER_16_BIT_SAMPLE_CLK_1: in std_logic;
	TRIGGER_16_BIT_2: in std_logic_vector(15 downto 0);
	TRIGGER_16_BIT_SAMPLE_CLK_2: in std_logic;
	TRIGGER_16_BIT_3: in std_logic_vector(15 downto 0);
	TRIGGER_16_BIT_SAMPLE_CLK_3: in std_logic;
	TRIGGER_16_BIT_4: in std_logic_vector(15 downto 0);
	TRIGGER_16_BIT_SAMPLE_CLK_4: in std_logic;
	-- Add triggers as necessary (up to 127 trigger signals total)


	-- Output registers
	REG250: out std_logic_vector(7 downto 0);
	REG251: out std_logic_vector(7 downto 0);


	-- Other input signals
	TRIGGER_REARM_TOGGLE: in std_logic;
	FORCE_TRIGGER_TOGGLE: in std_logic;
	REG250_READ: in std_logic;
	START_CAPTURE_TOGGLE: in std_logic
);
end entity;

architecture behavioral of COMSCOPE is
--------------------------------------------------------
--      COMPONENTS
--------------------------------------------------------

component CAPTURE_1_BIT_WORDS port (
	--GLOBAL CLOCKS
   CLK : in std_logic;				-- Master clock for this FPGA
	ASYNC_RESET: in std_logic;		-- Asynchronous reset active high


	-- Inputs
	DECIMATE_VALUE: in std_logic_vector(4 downto 0);
		-- Decimate value. Can be taken straight from the registers.
		-- The decimation will 2^DECIMATE_VALUE.
	TRIGGER_POSITION: in std_logic_vector(1 downto 0);
		-- 00		0 %
		-- 01		10 %
		-- 10		50 %
		-- 11		90 %
	WORD_1_BIT_IN: in std_logic;
		-- Input signal to be captured
	WORD_CLK_IN: in std_logic;
		-- WORD_1_BIT_IN will be read whenever WORD_CLK_IN = '1'.
	NEXT_WORD_PLEASE: in std_logic;
		-- Increments the READ_POINTER so that the next 8-bit 
		-- word is ready to be read.
	TRIGGER: in std_logic;
		-- Is one when a trigger was forced or if the trigger 
		-- conditions were met. One CLK cycle wide pulse.
	TRIGGER_REARM: in std_logic;
		-- One CLK cycle wide pulse used to rearm the trigger.
	START_CAPTURING: in std_logic;
		-- One CLK cycle wide pulse that makes sure data is
		-- being captured when nothing is going on. Necessary
		-- before a capture with a non-zero trigger offset.


	-- Outputs
	WORD_8_BIT_OUT: out std_logic_vector(7 downto 0);
		-- The signal that was stored in the RAM.
	WORD_CLK_OUT: out std_logic;
		-- WORD_8_BIT_OUT is valid when WORD_CLK_OUT = '1'.
	STATE: out std_logic_vector(1 downto 0)
		-- 01		CAPTURING
		-- 10		CAPTURING_WAITING_FOR_TRIGGER
		-- 11		CAPTURING_TRIGGER_DETECTED
		-- 00		CAPTURE_CEASED
);
end component;


component CAPTURE_2_BIT_WORDS port (
	--GLOBAL CLOCKS
   CLK : in std_logic;				-- Master clock for this FPGA
	ASYNC_RESET: in std_logic;		-- Asynchronous reset active high


	-- Inputs
	DECIMATE_VALUE: in std_logic_vector(4 downto 0);
		-- Decimate value. Can be taken straight from the registers.
		-- The decimation will 2^DECIMATE_VALUE.
	TRIGGER_POSITION: in std_logic_vector(1 downto 0);
		-- 00		0 %
		-- 01		10 %
		-- 10		50 %
		-- 11		90 %
	WORD_2_BIT_IN: in std_logic_vector(1 downto 0);
		-- Input signal to be captured.
	WORD_CLK_IN: in std_logic;
		-- WORD_2_BIT_IN will be read whenever WORD_CLK_IN = '1'.
	NEXT_WORD_PLEASE: in std_logic;
		-- Increments the READ_POINTER so that the next 8-bit 
		-- word is ready to be read.
	TRIGGER: in std_logic;
		-- Is one when a trigger was forced or if the trigger 
		-- conditions were met. One CLK cycle wide pulse.
	TRIGGER_REARM: in std_logic;
		-- One CLK cycle wide pulse used to rearm the trigger.
	START_CAPTURING: in std_logic;
		-- One CLK cycle wide pulse that makes sure data is
		-- being captured when nothing is going on. Necessary
		-- before a capture with a non-zero trigger offset.


	-- Outputs
	WORD_8_BIT_OUT: out std_logic_vector(7 downto 0);
		-- The signal that was stored in the RAM.
	WORD_CLK_OUT: out std_logic;
		-- WORD_8_BIT_OUT is valid when WORD_CLK_OUT = '1'.
	STATE: out std_logic_vector(1 downto 0)
		-- 01		CAPTURING
		-- 10		CAPTURING_WAITING_FOR_TRIGGER
		-- 11		CAPTURING_TRIGGER_DETECTED
		-- 00		CAPTURE_CEASED
);
end component;


component CAPTURE_4_BIT_WORDS port (
	--GLOBAL CLOCKS
   CLK : in std_logic;				-- Master clock for this FPGA
	ASYNC_RESET: in std_logic;		-- Asynchronous reset active high


	-- Inputs
	DECIMATE_VALUE: in std_logic_vector(4 downto 0);
		-- Decimate value. Can be taken straight from the registers.
		-- The decimation will 2^DECIMATE_VALUE.
	TRIGGER_POSITION: in std_logic_vector(1 downto 0);
		-- 00		0 %
		-- 01		10 %
		-- 10		50 %
		-- 11		90 %
	WORD_4_BIT_IN: in std_logic_vector(3 downto 0);
		-- Input signal to be captured
	WORD_CLK_IN: in std_logic;
		-- WORD_4_BIT_IN will be read whenever WORD_CLK_IN = '1'.
	NEXT_WORD_PLEASE: in std_logic;
		-- Increments the READ_POINTER so that the next 8-bit 
		-- word is ready to be read.
	TRIGGER: in std_logic;
		-- Is one when a trigger was forced or if the trigger 
		-- conditions were met. One CLK cycle wide pulse.
	TRIGGER_REARM: in std_logic;
		-- One CLK cycle wide pulse used to rearm the trigger.
	START_CAPTURING: in std_logic;
		-- One CLK cycle wide pulse that makes sure data is
		-- being captured when nothing is going on. Necessary
		-- before a capture with a non-zero trigger offset.


	-- Outputs
	WORD_8_BIT_OUT: out std_logic_vector(7 downto 0);
		-- The signal that was stored in the RAM.
	WORD_CLK_OUT: out std_logic;
		-- WORD_8_BIT_OUT is valid when WORD_CLK_OUT = '1'.
	STATE: out std_logic_vector(1 downto 0)
		-- 01		CAPTURING
		-- 10		CAPTURING_WAITING_FOR_TRIGGER
		-- 11		CAPTURING_TRIGGER_DETECTED
		-- 00		CAPTURE_CEASED
);
end component;


component CAPTURE_8_BIT_WORDS port (
	--GLOBAL CLOCKS
   CLK : in std_logic;				-- Master clock for this FPGA
	ASYNC_RESET: in std_logic;		-- Asynchronous reset active high


	-- Inputs
	DECIMATE_VALUE: in std_logic_vector(4 downto 0);
		-- Decimate value. Can be taken straight from the registers.
		-- The decimation will 2^DECIMATE_VALUE.
	TRIGGER_POSITION: in std_logic_vector(1 downto 0);
		-- 00		0 %
		-- 01		10 %
		-- 10		50 %
		-- 11		90 %
	WORD_8_BIT_IN: in std_logic_vector(7 downto 0);
		-- Input signal to be captured
	WORD_CLK_IN: in std_logic;
		-- WORD_4_BIT_IN will be read whenever WORD_CLK_IN = '1'.
	NEXT_WORD_PLEASE: in std_logic;
		-- Increments the READ_POINTER so that the next 8-bit 
		-- word is ready to be read.
	TRIGGER: in std_logic;
		-- Is one when a trigger was forced or if the trigger 
		-- conditions were met. One CLK cycle wide pulse.
	TRIGGER_REARM: in std_logic;
		-- One CLK cycle wide pulse used to rearm the trigger.
	START_CAPTURING: in std_logic;
		-- One CLK cycle wide pulse that makes sure data is
		-- being captured when nothing is going on. Necessary
		-- before a capture with a non-zero trigger offset.


	-- Outputs
	WORD_8_BIT_OUT: out std_logic_vector(7 downto 0);
		-- The signal that was stored in the RAM.
	WORD_CLK_OUT: out std_logic;
		-- WORD_8_BIT_OUT is valid when WORD_CLK_OUT = '1'.
	STATE: out std_logic_vector(1 downto 0)
		-- 01		CAPTURING
		-- 10		CAPTURING_WAITING_FOR_TRIGGER
		-- 11		CAPTURING_TRIGGER_DETECTED
		-- 00		CAPTURE_CEASED
);
end component;


component CAPTURE_16_BIT_WORDS port (
	--GLOBAL CLOCKS
   CLK : in std_logic;				-- Master clock for this FPGA
	ASYNC_RESET: in std_logic;		-- Asynchronous reset active high


	-- Inputs
	DECIMATE_VALUE: in std_logic_vector(4 downto 0);
		-- Decimate value. Can be taken straight from the registers.
		-- The decimation will 2^DECIMATE_VALUE.
	TRIGGER_POSITION: in std_logic_vector(1 downto 0);
		-- 00		0 %
		-- 01		10 %
		-- 10		50 %
		-- 11		90 %
	WORD_16_BIT_IN: in std_logic_vector(15 downto 0);
		-- Input signal to be captured
	WORD_CLK_IN: in std_logic;
		-- WORD_4_BIT_IN will be read whenever WORD_CLK_IN = '1'.
	NEXT_WORD_PLEASE: in std_logic;
		-- Increments the READ_POINTER so that the next 8-bit 
		-- word is ready to be read.
	TRIGGER: in std_logic;
		-- Is one when a trigger was forced or if the trigger 
		-- conditions were met. One CLK cycle wide pulse.
	TRIGGER_REARM: in std_logic;
		-- One CLK cycle wide pulse used to rearm the trigger.
	START_CAPTURING: in std_logic;
		-- One CLK cycle wide pulse that makes sure data is
		-- being captured when nothing is going on. Necessary
		-- before a capture with a non-zero trigger offset.


	-- Outputs
	WORD_8_BIT_OUT: out std_logic_vector(7 downto 0);
		-- The signal that was stored in the RAM.
	WORD_CLK_OUT: out std_logic;
		-- WORD_8_BIT_OUT is valid when WORD_CLK_OUT = '1'.
	STATE: out std_logic_vector(1 downto 0)
		-- 01		CAPTURING
		-- 10		CAPTURING_WAITING_FOR_TRIGGER
		-- 11		CAPTURING_TRIGGER_DETECTED
		-- 00		CAPTURE_CEASED
);
end component;

--------------------------------------------------------
--     SIGNALS
--------------------------------------------------------


--// Constants
signal ZERO: std_logic;
signal ONE: std_logic;
signal ZERO8: std_logic_vector(7 downto 0);


signal NEXT_WORD_PLEASE: std_logic;
signal TRIGGER: std_logic;
signal TRIGGER_REARM_TOGGLE_D: std_logic:= '0';
signal TRIGGER_REARM_TOGGLE_D2: std_logic:= '0';
signal TRIGGER_REARM: std_logic;