IOBUF   hdmi_iic_scl_iobuf(
                        .I              (hdmi_iic_scl_o                 ),
                        .IO             (hdmi_iic_scl_io                ),
                        .O              (hdmi_iic_scl_i                 ),
                        .T              (hdmi_iic_scl_t                 )
                        );
                      
IOBUF   hdmi_iic_sda_iobuf(
                        .I              (hdmi_iic_sda_o                 ),
                        .IO             (hdmi_iic_sda_io                ),
                        .O              (hdmi_iic_sda_i                 ),
                        .T              (hdmi_iic_sda_t                 )
                         );

inout                                   hdmi_iic_scl_io;
inout                                   hdmi_iic_sda_io;

这样就可以了， 我们的案子中有这样的应用， 是用axi-iic模块，例化的时候这样例化 ；

希望对你有帮助， 同时也希望你看看我做的板子

http://lolo84.spaces.eepw.com.cn/articles/article/item/123715