I have a lattice MachXO3L starter kit and I'm having some trouble with inputs, I think. I'm tried reducing the code only to read 4 switches (MachXO3 Starter Kit User’s Guide page 26) and light 4 LEDs according to the state of the switch. The problem is the LEDs seem to be half off. I tried adding 'reveal' and it appears that I'm not getting any change from the switches when I expect change. I set the spreadsheet I set it the same as in the example. I'm still learning VHDL, this is the first time I'm actually trying to connect something to it and the example is on Verilog, so I can't really check what I'm doing wrong. I'm probably missing something basic, but I don't know what.
Top File:
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity TOP is
GENERIC(
DATAWIDTH : natural := 4
);
PORT(
-- Input Buffer --
ADCInputBuffer : IN STD_LOGIC_VECTOR (DATAWIDTH-1 downto 0);
OUTPUT : OUT STD_LOGIC_VECTOR (DATAWIDTH-1 downto 0);
ADC_SRT : OUT STD_LOGIC
);
end TOP;
architecture ADReader of TOP is
SIGNAL INTERNAL_CLOCK : STD_LOGIC;
SIGNAL CLOCK : STD_LOGIC;
SIGNAL CLOCK_65 : STD_LOGIC;
-- BUFFER --
signal adcInPut : std_logic_vector(DATAWIDTH-1 downto 0);
---------------------------------------------------
-- Internal Clock. Mach0X3 --
---------------------------------------------------
COMPONENT OSCH is
GENERIC(NOM_FREQ: string := "133.00"); --133.00MHz, or can select other supported frequencies
PORT(
STDBY : IN STD_LOGIC; --'0' OSC output is active, '1' OSC output off
OSC : OUT STD_LOGIC; --the oscillator output
SEDSTDBY : OUT STD_LOGIC --required only for simulation when using standby
);
END COMPONENT;
---------------------------------------------------
-- Internal Clock multiplier. Mach0X3 --
---------------------------------------------------
COMPONENT MASTERCLOCK is
PORT(
CLKI : IN STD_LOGIC; --'0' OSC output is active, '1' OSC output off
CLKOP : OUT STD_LOGIC; --the oscillator output 260MHz
CLKOS : OUT STD_LOGIC --the oscillator output for adc 65Mhz
);
END COMPONENT;
---------------------------------------------------
-- Read data In --
---------------------------------------------------
COMPONENT InputBuffer is
GENERIC(n: natural :=DATAWIDTH );
PORT(
clk : in STD_LOGIC;
CLK65 : IN STD_LOGIC;
En : in STD_LOGIC;
STRT : OUT STD_LOGIC;
Ipin : in STD_LOGIC_VECTOR (n-1 downto 0);
Output : out STD_LOGIC_VECTOR (n-1 downto 0)
);
END COMPONENT;
begin
-- System Clock
OSC: OSCH
GENERIC MAP (NOM_FREQ => "133.0")
PORT MAP (STDBY => '0', OSC => INTERNAL_CLOCK, SEDSTDBY => OPEN);
-- System Clock Multiplied
OSCmain: MASTERCLOCK
PORT MAP (CLKI => INTERNAL_CLOCK, CLKOP => CLOCK, CLKOS => CLOCK_65);
-- Gets data from ONE ADC
ADCIn: InputBuffer
GENERIC MAP (n => DATAWIDTH)
PORT MAP( clk => CLOCK, CLK65 =>CLOCK_65, EN =>'0', Ipin => adcInPut, Output => OUTPUT, STRT => ADC_SRT );
adcInPut <= ADCInputBuffer;
end ADReader;
InputBuffer:
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity InputBuffer is
generic(n: natural :=4 );
Port (
clk : in STD_LOGIC;
CLK65 : IN STD_LOGIC;
En : in STD_LOGIC;
STRT : OUT STD_LOGIC;
Ipin : in STD_LOGIC_VECTOR (n-1 downto 0);
Output : out STD_LOGIC_VECTOR (n-1 downto 0)
);
end InputBuffer;
architecture Behavioral of InputBuffer is
signal temp : STD_LOGIC_VECTOR(n-1 downto 0);
SIGNAL CLK2 : STD_LOGIC;
begin
-- invert the signal from the push button switch and route it to the LED
process(clk, En)
begin
if( En = '1') then
temp <= B"0000";
elsif rising_edge(clk) then
temp <= Ipin;
end if;
end process;
Output <= temp;
STRT <= CLK65;
end Behavioral;
this is the setting for MASTERCLOCK generated by lattice diamond: this is how the pins are setup: and here is the netlist generated by lattice-diamond:
here I'm just trying to have a static output:
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity TOP is
GENERIC(
DATAWIDTH : natural := 4
);
PORT(
OUTPUT : OUT STD_LOGIC_VECTOR (DATAWIDTH-1 downto 0)
);
end TOP;
architecture ADReader of TOP is
begin
OUTPUT <= B"1010";
end ADReader;
Page 15 of the user guide (The link you provided) mentions different LED pins: H11,J13,J11,L12 which you have as ADC input. I think you might have swapped some pins around...