摘要: 代码 阅读全文
posted @ 2011-01-25 22:54 IAmAProgrammer 阅读(407) 评论(0) 推荐(0) 编辑
摘要: library IEEE;use IEEE.STD_LOGIC_1164.ALL;-- Uncomment the following library declaration if using-- arithmetic functions with Signed or Unsigned valuesuse IEEE.NUMERIC_STD.ALL; subtype slv is std_logic_vector;signal dpll_counter :std_logic_vector( 4 downto 0 ); dpll_counter = dpll_counter + "00001"; 阅读全文
posted @ 2011-01-25 17:55 IAmAProgrammer 阅读(573) 评论(0) 推荐(0) 编辑
摘要: Source FilesXapp134 is taken off from Xilinx public website. But the design is still in the Xilinx example designs.C:\Xilinx\11.1\ISE\ISEexamplesClock设计使用两个DCM,其中一个DCM做external feedback,一个DCM做internal feedback,充分利用DCM的deskew功能,使得:内部反馈那个DCM的时钟输出与FPGA时钟输入PIN相位对齐;外部反馈到后端设备的时钟与FPGA时钟输入PIN相位对齐。这样,有四个点的时钟 阅读全文
posted @ 2011-01-25 13:11 IAmAProgrammer 阅读(514) 评论(0) 推荐(0) 编辑
摘要: 现在就开始精彩的博客之旅! 阅读全文
posted @ 2011-01-25 12:33 IAmAProgrammer 阅读(175) 评论(0) 推荐(0) 编辑