VHDL和Verilog的混合编程VIP免费

VHDL 调用Verilog 模块的时候，要在实例化模块前，加上“verilogmodelGM： ” VHDL 调用verlog verilog module： module m(a,b,c); input a,b; output c; ... endmodule 调用如下： compoent m port( a: in std_logic; b: in std_logic; c: out std_logic ); end compoent begin verilogmodelGE: m port map (... ) ... end 在VHDL 里调用Verilog 的话：例化+映射 在Verilog 里调用VHDL 的话：只要映射 看的别人的。。。 被骗了,所以发点实在的,VHDL与verilog调用 这里用VHDL调用VERILOG写好的模块. 先按VHDL的语法声明实体（也就是你用Verilog写的模块），然后按VHDL的语法例化实体就行了 . 这样就不用转换了,或者可以少用转换了. 例子. library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; use work.dt16_pkg.all; entity clk_alm is port ( reset : in std_logic; fck32m : in std_logic; --来自背板的32M帧头 clk32m : in std_logic; --来自背板的32M时钟 refclk2m : in std_logic; --2M参考时钟 clklos : out std_logic --时钟告警输出 ); end clk_alm; architecture arch_clk_alm of clk_alm is component clk_dog port( reset : in std_logic; clock : in std_logic;--work clock refclk : in std_logic;--reference clock alm : out std_logic ); end component; component ALM --声明 port( XMCLK : in std_logic; RST : in std_logic; M_CLK : in std_logic; LOST_ALM : out std_logic ); end component; signal alm_clk: std_logic; signal alm_fck: std_logic; signal refclk2m_div: std_logic; signal count: std_logic_vector(2 downto 0); signal delay_los: std_logic; begin clk_dog0: clk_dog port map ( reset => reset , clock=>clk32m , refclk =>refclk2m , alm =>alm_clk ); fck_dog0: ALM --例化 PORT MAP( XMCLK => fck32m , RST => reset , M_CLK => refclk2m_div , LOST_ALM => alm_fck ); process(reset,refclk2m) begin if reset='1' then count<=(others=>'0'); elsif refclk2m'event and refclk2m='1' then count<=count+1; end if; end process; refclk2m_div<=count(2); clklos<=not(alm_clk and alm_fck); end arch_clk_alm; -----------------以下是 verilog写的 module----------------- module ALM (XMCLK, RST, M_CLK, LOST_ALM); input XMCLK ; input RST ; input M_CLK ; output LOST_ALM ; reg LOST_ALM; reg [2:0]ALM_STATE; reg [2:0]COUNTA; reg [2:0]COUNTB; reg [2:0]COUNTC; always @(negedge RST or posedge XMCLK) begin if (!RST) COUNTA <= 0; else if (COUNTA == 7) COUNTA <= 0; else COUNTA <= COUNTA + 1; end always @(posedge M_CLK) begin if (!RST) begin COUNTB <= 0; COUNTC <= 0; end else begin COUNTC <= COUNTB; COUNTB <= COUNTA; end end always @(negedge M_CLK) begin if (!RST) ALM_STATE <= 0; else if (ALM_STATE == 7) ALM_STATE <= 0; else if (COUNTC == COUNTB) ALM_STATE <= ALM_STATE + 1; else ALM_STATE <= 0; end always @(posedge M_CLK) begin if (!RST) LOST_ALM <= 1; else if (ALM_STATE == 7) LOST_ALM <= 0; else LOST_ALM <= 1; end endmodule