https://blog.youkuaiyun.com/wangjun403zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/wangjun403/article/details/40106985https://blog.youkuaiyun.com/wangjun403/article/details/40106985wangjun403Wed, 15 Oct 2014 10:00:17 +0800https://blog.youkuaiyun.com/wangjun403/article/details/19242517https://blog.youkuaiyun.com/wangjun403/article/details/19242517wangjun403Sat, 15 Feb 2014 15:38:57 +0800https://blog.youkuaiyun.com/wangjun403/article/details/7340795https://blog.youkuaiyun.com/wangjun403/article/details/7340795wangjun403Sat, 10 Mar 2012 21:51:07 +0800https://blog.youkuaiyun.com/wangjun403/article/details/7340676https://blog.youkuaiyun.com/wangjun403/article/details/7340676wangjun403Sat, 10 Mar 2012 21:43:12 +0800> b=[0,1]]]>https://blog.youkuaiyun.com/wangjun403/article/details/7235151https://blog.youkuaiyun.com/wangjun403/article/details/7235151wangjun403Sun, 05 Feb 2012 18:50:04 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6709713https://blog.youkuaiyun.com/wangjun403/article/details/6709713wangjun403Mon, 22 Aug 2011 20:28:23 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6462143https://blog.youkuaiyun.com/wangjun403/article/details/6462143wangjun403Thu, 02 Jun 2011 19:33:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6443303https://blog.youkuaiyun.com/wangjun403/article/details/6443303wangjun403Tue, 24 May 2011 20:19:00 +0800和C语言基本相似
 
文件功能，对任意输入的x求相应的y值
 
function y=exm060101(x) n=length(x); for k=1:n if x(k)<-1 y(k)=x(k); elseif x(k)>=1 y(k)=exp(1-x(k)); else y(k)=x(k)^3; end end
结果
>> x=]]>https://blog.youkuaiyun.com/wangjun403/article/details/6318840https://blog.youkuaiyun.com/wangjun403/article/details/6318840wangjun403Tue, 12 Apr 2011 20:08:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6269258https://blog.youkuaiyun.com/wangjun403/article/details/6269258wangjun403Tue, 22 Mar 2011 21:36:00 +0800数字秒表，因为仿真的问题，现在只有毫秒和秒。如果分和小时都弄上，仿真要出效果得走半天，所以就删掉了
现在只能按下复位键后计时，以后慢慢添加更多功能，包括保存，多次计时等
 
 
--毫秒功能 library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity time_ms is port( clk ,reset :in std_]]>https://blog.youkuaiyun.com/wangjun403/article/details/6257574https://blog.youkuaiyun.com/wangjun403/article/details/6257574wangjun403Thu, 17 Mar 2011 23:21:00 +0800功能：存入数据按顺序排放，存储器全满时给出信号并拒绝继续存入，全空时也给出信号并拒绝读出；读出时按先进先出原则；存储数据一旦读出就从存储器中消失
 
library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use ieee.std_logic_signed.all; entity fifo is port( datain :in std_logic_ve]]>https://blog.youkuaiyun.com/wangjun403/article/details/6246830https://blog.youkuaiyun.com/wangjun403/article/details/6246830wangjun403Sun, 13 Mar 2011 20:46:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6214101https://blog.youkuaiyun.com/wangjun403/article/details/6214101wangjun403Mon, 28 Feb 2011 21:02:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6118682https://blog.youkuaiyun.com/wangjun403/article/details/6118682wangjun403Wed, 05 Jan 2011 19:34:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6108270https://blog.youkuaiyun.com/wangjun403/article/details/6108270wangjun403Thu, 30 Dec 2010 22:20:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6098917https://blog.youkuaiyun.com/wangjun403/article/details/6098917wangjun403Sun, 26 Dec 2010 13:01:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/6095132https://blog.youkuaiyun.com/wangjun403/article/details/6095132wangjun403Thu, 23 Dec 2010 21:07:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/5764997https://blog.youkuaiyun.com/wangjun403/article/details/5764997wangjun403Sun, 25 Jul 2010 21:08:00 +0800 
原 来一直对于可执行程序的内存分布很迷惑，最近查了好多资料以及请教了诸多高手，方有一些领悟，现将自己领悟的写下来，以供大家批评指正。
 
在操作系统中，一个进程就是处于执行期的程序（当然包括系统资源），实际上正在执行的程序代码的活标本。 那么进程的逻辑地址空间是如何划分的呢？
    图1 做 了简单的说明(Linux系统下的) ：
             

图1
左边的是UNIX/LINUX系统]]>https://blog.youkuaiyun.com/wangjun403/article/details/5205018https://blog.youkuaiyun.com/wangjun403/article/details/5205018wangjun403Sun, 17 Jan 2010 23:05:00 +0800https://blog.youkuaiyun.com/wangjun403/article/details/4724767https://blog.youkuaiyun.com/wangjun403/article/details/4724767wangjun403Sun, 25 Oct 2009 01:09:00 +0800C语言程序结构（存储时）
1、代码区（text segment）。存放CPU执行的机器指令（machine instructions）。
通常代码区是可共享的（即另外的可执行程序可以调用它），因为对于频繁被执行的程序，只需要在内存中有一份代码即可。代码去通常只是可读的，另外，代码区还规划了局部变量的相关信息
2、全局初始化数据区/静态数据区（initialized data segment/data segment）。该区包含了在程序中明确被初始化的全局]]>