ena_sda_out.vhd

vhdl的i2c程序

LIBRARY IEEE ;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY ENA_SDA_OUT IS
   PORT (       ENA_SDA_OUT      :IN  STD_LOGIC;
                SDA_OUT          :IN  STD_LOGIC;            
                SDA              :OUT STD_LOGIC                        
         );
                
 END ENA_SDA_OUT;

ARCHITECTURE RTL OF ENA_SDA_OUT IS
BEGIN
SDA<=SDA_OUT WHEN ENA_SDA_OUT='1' ELSE
       'Z';
    
END RTL;