2015 年 4月随笔档案 - mengdie

VHDL_LIB之DFF

摘要：1 D-Flip-Flop with async reset or set 1 library IEEE; 2 use ieee.std_logic_1164.all; 3 4 entity FFD is 5 generic 6 ( 7 ResetVal :... 阅读全文

posted @ 2015-04-30 15:53 mengdie 阅读(539) 评论(0) 推荐(0)

VCS之Git

摘要：Git-- open source distributed version control system-- A stream of snapshots(if no change,just link)-- Three stateshttp://git-scm.com/http://git-scm.c... 阅读全文

posted @ 2015-04-28 17:39 mengdie 阅读(172) 评论(0) 推荐(0)

英语之idiom

摘要：1 quick and dirty = Done or constructed in ahasty,approximate,temporarilyadequatemanner, but notexact,fullyformed, orreliablefor a long period of ti... 阅读全文

posted @ 2015-04-27 19:29 mengdie 阅读(234) 评论(0) 推荐(0)

VHDL之conversion function

摘要：VHDL Type Cast and Conversion Functions **In ASIC design, do NEVER use integer or natural for signals, use conversion functions instead** The pictur... 阅读全文

posted @ 2015-04-24 22:20 mengdie 阅读(440) 评论(0) 推荐(0)

QS之warning message

摘要：Multiple message categories are specified as a comma separated list. 阅读全文

posted @ 2015-04-18 15:23 mengdie 阅读(125) 评论(0) 推荐(0)

Verilog之openMSP430(1)

摘要：openMSP430_IO interruptVerilog file: omsp_gpio.v 1 //============================================================================ 2 // 4) INTERRUPT GE... 阅读全文

posted @ 2015-04-17 19:49 mengdie 阅读(583) 评论(0) 推荐(0)

QS之vcom

摘要：-2008 | -2002 | -93 | -87 choose VHDL 2008, 2002, 1993, or 1987-explicit resolve ambiguous overloads-work specify work library-check_synthesis ... 阅读全文

posted @ 2015-04-17 17:23 mengdie 阅读(118) 评论(0) 推荐(0)

HDL之Bitwise operation

摘要：1 Verilog1.1 Bitwise operator Bitwise operators perform a bit wise operation on two operands. They take each bit in one operand and perform the op... 阅读全文

posted @ 2015-04-17 17:17 mengdie 阅读(619) 评论(0) 推荐(0)

Embedded之memory type

摘要：1 Types of memory 2 Characteristics 阅读全文

posted @ 2015-04-17 15:43 mengdie 阅读(179) 评论(0) 推荐(0)

RFID之UID

摘要：1 Unique identifier (UID) The VICCs are uniquely identified by a 64 bits unique identifier (UID). This is used for addressing eachVICC uniquely and ... 阅读全文

posted @ 2015-04-16 23:43 mengdie 阅读(1608) 评论(0) 推荐(0)

VHDL之package

摘要：Pacakge Frequently used pieces of VHDL code are usually written in theform of COMPONENTS, FUNCTIONS, or PROCEDURES. Such codes are thenplaced insid... 阅读全文

posted @ 2015-04-16 20:07 mengdie 阅读(1816) 评论(0) 推荐(0)

QS之vsim

摘要：vsim -The vsim command invokes the VSIM simulator-L … (optional) Specifies the library to search for design units instantiated from Verilog and for ... 阅读全文

posted @ 2015-04-16 16:57 mengdie 阅读(360) 评论(0) 推荐(0)

Embedded之memory test

摘要：1 main.c 1 #include "led.h" 2 3 #define BASE_ADDRESS (volatile datum *) 0x10000000 4 #define NUM_BYTES 0x10000 5 6 /*******************... 阅读全文

posted @ 2015-04-15 21:55 mengdie 阅读(424) 评论(0) 推荐(0)

Embedded之Introduction

摘要：1 Embedded system An embedded system is a combination of computer hardware and software, and perhaps additional mechanical or other parts, designed ... 阅读全文

posted @ 2015-04-15 21:10 mengdie 阅读(183) 评论(0) 推荐(0)

Linux_搜文件

摘要：Linux 下搜文件,通常先用 whereis 或 locate ，如果找不到，才以 find 搜寻！因为 whereis 与 locate 是利用数据库来搜寻数据，省时间！>1 whereis (寻找特定文件)whereis [-bmsu] 文件或目录名-b : 只找 binary 格式的文... 阅读全文

posted @ 2015-04-14 14:55 mengdie 阅读(188) 评论(0) 推荐(0)

宋词_苏轼

摘要：江城子·密州出猎 (1075年)老夫聊发少年狂，左牵黄，右擎苍，锦帽貂裘，千骑卷平冈。为报倾城随太守，亲射虎，看孙郎。酒酣胸胆尚开张，鬓微霜，又何妨？持节云中，何日遣冯唐？会挽雕弓如满月，西北望，射天狼。江城子·乙卯正月二十日夜记梦(1075年)十年生死两茫茫，不思量，自难忘。千里孤... 阅读全文

posted @ 2015-04-11 19:19 mengdie 阅读(148) 评论(0) 推荐(0)