The attribute must be declared as : attribute clock_buffer : boolean; For example library IEEE; use IEEE.STD_LOGIC_1164.all; entity prep7 is generic (width : natural := 15); port (CLK, RST,LD,CE : in std_logic; D : in std_logic_vector (width downto 0); Q : buffer std_logic...
1libraryieee;2useieee.std_logic_1164.all;34entitysafe_stateis56port(7clk :instd_logic;8data_in :instd_logic;9reset :instd_logic;10data_out :outstd_logic_vector(1downto0)11);1213endentity;1415architecturertlofsafe_stateis1617-- Build an enumeratedtypeforthe state machine18typestate_typei...
PORT(clk,reset:INSTD_LOGIC; state_inputs:INSTD_LOGIC_VECTOR(0TO1); comb_outputs:OUTINTEGERRANGE0TO15); ENDs_machine; ARCHITECTUREbehvOFs_machineIS TYPEFSM_STIS(s0,s1,s2,s3); SIGNALcurrent_state,next_state:FSM_ST; BEGIN REG:PROCESS(reset,clk) ...
第二部分状态机VHDL设计 状态机（STATEMACHINE）可以说是一个广义时序电路，触发器,计数器,移位寄存器都算是它的特殊功能的一种.在电子设计自动化应用当中,状态机经常是担任CPU的功能,从某种意义上讲状态机的应用让系统具有了智能化的功能,业界为状态机和CPU的功能一直争论不休,不过事实是更多人倾向于状态机,认为状态...
1.Found clock-sensitive change during active clock edge at time on register "<name>"原因：vector source file中时钟敏感信号（如：数据，允许端，清零，同步加载等）在 时钟的边缘同时变化。而时钟敏感信号是 不能在时钟边沿变化的。其后果为导致结果不正确。措施：编辑vector source file 2.Verilog HDL a ...
---没有编写testbench文件,或者没有编辑输入变量的值 testbench里是元件申明和映射 14 Error: VHDL Binding Indication error at freqdetect_top.vhd(19): port class in design entity does not have std_logic_vector type that is specified for the same generic in the associated component ---在相关的...
In_Level : out std_logic_vector(log2ceil(Depth_g + 1) - 1 downto 0); -- Output Data Out_Data : out std_logic_vector(Width_g - 1 downto 0); Out_Valid : out std_logic; Out_Ready : in std_logic := '1'; Out_Level : out std_logic_vector(log2ceil(Depth_g + 1) - 1...
process(reset_n,clk) variable detect : std_ulogic_vector (1 downto 0); begin if reset_n ='0' then detect := "00"; elsif rising_edge(clk) then detect(1) := detect(0); -- record last value of sync in detect(1) detect(0) := sync ; --record current sync ...
14 Error: VHDL Binding Indication error at freqdetect_top.vhd(19): port "class" in design entity does not have std_logic_vector type that is specified for the same generic in the associated component ---在相关的元件里没有当前文件所定义的类型 15 Error: VHDL error at tongbu.vhd(16): can...
没有编写 testbench 文件,或者没有编辑输入变量的值 testbench 里是元件申明和 映射14 Error: VHDLBinding Indication error at freqdetect_top.vhd(19): port class in design entity does not have std_logic_vector type that is 25、 specified for the same generic in the associated ponent- 在相关的...