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Stim_proc : process begin - hold reset state for 100 ns. Clock period definitions constant CLK_period : time := 10 ns īEGIN - FPGA projects, VHDL projects, Verilog projects - Instantiate the Unit Under Test (UUT) Outputs signal Q_OUT : std_logic_vector( 4 downto 0) In this tutorial, we will: Write a VHDL program to build a 4-bit binary to gray, and gray to the binary code converter. Q_OUT : OUT std_logic_vector( 4 downto 0) In the previous tutorial, VHDL Tutorial 19, we designed a 4-bit binary counter using VHDL. FPGA projects, VHDL projects, Verilog projects - VHDL project: VHDL code for ring counter - VHDL Testbench code for ring counter ENTITY tb_counter IS END tb_counter ĪRCHITECTURE behavior OF tb_counter IS - Component Declaration for the Unit Under Test (UUT) COMPONENT Structural_Ring_Counter GENERIC N_BIT_Ring_counter : for i in 0 to N - 1 generate beginį0 : if ( i = 0 ) generate - First DFF begin U1 : entity work.DFF port mapį1 : if ( i /= 0 ) generate - The rest of DFFs begin U2 : entity work.DFF port map Signal D,Q : std_logic_vector(N - 1 downto 0) :=( others => '0') īegin - FPGA projects, VHDL projects, Verilog projects

Else, if both the branch and zero signals are. Q_OUT : out std_logic_vector(N - 1 downto 0) - outputĪrchitecture structural of Structural_Ring_Counter is - FPGA projects, VHDL projects, Verilog projects signal not_QN : std_logic If the jump control signal is high, the value of the program counter will be incremented by (instruction25:0. N bit switch tail ring counter - STructurally entity Structural_Ring_Counter is generic ( N : integer := 4 ) FPGA projects, VHDL projects, Verilog projects - VHDL project: VHDL code for ring counter library IEEE