基于FPGA的I2C总线控制核设计》P23 I2C控制核的VHDL源码如下： .附录：VHDL源代码 1. i2c_top 模块逻辑代码 entity i2c_top is port( eclk: in std_logic; nReset: in std_logic; --asram interface signal of EMIF nAoe: in std_logic; nAwe: in std_logic; nAre: in std_logic; -- Ardy: out std_logi
oracl 和db2 常用语法比较： 1、取前N条记录 Oracle：Select * from TableName where rownum <= N; DB2：Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle：Select sysdate from dual; DB2：Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle：Select
