Linux Serial Console HOWTO

Linux Serial Console HOWTO

Visitor pattern

Visitor pattern

MenuTest5 ( Python )

.csv .h converter

test class HashTable ( Java )

Hash Table

Hash Tables2

The solution for implementing the HashTable class

See also
p143-145, B. Kernighan, D. Ritchie, The C Programming Language Second Edition, Prentice Hall.

Hash Tables

Implement a HashTable class

class Hashtable
Hash collision
Hashing

SSH on DSL ( Linux )

Right click on the desktop -> Choose System ->Daemons -> ssh -> start

on the server

then

Type

% slogin 192.168.*.*

from client.

MenuTest3 ( Python )

Messy code here.
This is my first 'class' in Python.

The output is the same as MenuTest1 + MenuTest2.


%python test3.py ( input_file ) ( output_file )

(example)
%python test3.py test.csv test.h

%cat test3.py

#! /usr/bin/env python

import re
import os, sys

input_file = sys.argv[ 1 ]
output_file = sys.argv[ 2 ]

class MenuConverter:
        def setInputFile( self, fileName ):
                self.readFrom = fileName

        def setOutputFile( self, fileName ):
                self.writeTo = fileName

        def writeStrToFile( self, str ):
                output = sys.stdout
                output = open( self.writeTo, 'w' )
                output.write( str )

        def setMenuId( self ):
                buf = ""
                pre = """enum MenuId {"""
                post = """TOTALIDS \n};\n\n"""

                file = open( self.readFrom )
                text = file.read()

                buf =  re.sub( "[^\w]+", ",\n\tmnu", text )
                buf = pre + buf[ 1: ] + post
                return  buf

        def setExeId( self ):
                pre = """enum MenuExeId\n{\n\tmnux"""
                post = """};\n\n"""
                buf = ""
                result = []

                for line in open( self.readFrom ).readlines():
                        line = line.replace( '"', "" ).split( "," )
                        result = result + line[ -1: ]
                buf = ''.join( result )
                buf = pre + re.sub( "\n(?=.\w)", ",\n\tmnux", buf ) + post
                return buf

x = MenuConverter()
x.setInputFile( input_file )
x.setOutputFile( output_file )
x.writeStrToFile(  x.setMenuId() + x.setExeId() )

MenuTest2 ( Python )

%cat test2.py

#! /usr/bin/env python

import re

pre = """enum MenuExeId\n{\n\tmnux"""
post = """};"""

buf = ""
result = []

for line in open( 'test.csv' ).readlines():
        line = line.replace( '"', "" ).split( "," )
        result = result + line[ -1: ]   
buf = ''.join( result )

buf = pre + re.sub( "\n(?=.\w)", ",\n\tmnux", buf ) + post

print buf

%python test2.py

enum MenuExeId
{
        mnuxStart
        mnuxStop
        mnuxReset
        mnuxCounts
        mnuxStorage
        mnuxSettings
        mnuxGPS
        mnuxAccel
        mnuxFilter
};

I used string -> list -> string this time.

MenuTest1 ( Python )

This topic is for my Embedded Systems course at school.

Synopsis:
Make a test code for getting the menu names from .csv file by using Python and save them for the definitions in .h.

1. Make a list by using spreadsheets such as Excel. In this case, I used NeoOffice.
2. Export the file as .csv.

%cat test.csv

"Greet","Execute","Start"
,,"Stop",
,,"Reset"
,"Status","Counts"
,,"Storage"
,,"Settings"
,,"GPS"
,,"Accel"
,"Setup","Filter"

%cat test.py

#! /usr/bin/env python

import re

file = open('test.csv')
text = file.read()

buf = ""
top = """enum MenuId {\n"""
bottom = """TOTALIDS \n};"""

buf =  re.sub( "[^\w]+", ",\n\tmnu", text ) 
buf = top + buf[ 1: ] + bottom

print buf

%python test.py

enum MenuId {

        mnuGreet,
        mnuExecute,
        mnuStart,
        mnuStop,      
        mnuReset,
        mnuStatus,
        mnuCounts,
        mnuStorage,
        mnuSettings,
        mnuGPS,
        mnuAccel,
        mnuSetup,
        mnuFilter,
        mnuTOTALIDS 
};

User Interface in C/C++

CONIO
Curses
Curses Tutorial

Ubiquitous?

ubiquitous computing
- the current trend of using computer technology in every aspect of our lives

Today we speak of ubiquitous computing, meaning that computer technology is everywhere and affects almost every aspect of our lives.

( p618, J. Satzinger, R. Jackson, S. Burd, SYSTEMS ANALYSIS & DESIGN, Thompson course technology )

『明らかな誤用」認定されている"ubiquitous society"という表現は『デジタル音楽の行方』に登場する

GCC on Damn Small Linux with my old laptop ( Linux )

Damn Small Linux
cfdisk
Install

I am using a pcmcia called "IO DATA ETXPCM", but my DSL does't configure this devise.
So,

1. Check the property of this devise by using cardctl command.

%cardctl ident

Socket 0:
  product info: "IO DATA", "ETXPCM", "3.0", "AX88190"
  manfid: 0x0149, 0xc1ab
  function: 6 (network)

2. Add below in /etc/pcmcia/config

card "IO DATA EXT-PCM"
  version "IO DATA", "ETXPCM", "*", "AX88190"
  #manfid  0x0149, 0xc1ab
  bind "axnet_cs"

3. Commnet out all "manfid 0x0149, 0xc1ab" in /etc/pcmcia/config
　
4. Reboot.

http://vine.ic.sci.yamaguchi-u.ac.jp/8/msg00361.html

5. Install GCC

5.1. right click-Apps-Tools-MyDSL Extension Browser
5.2. click System button
5.3. choose gcc1.dsl.info and click download
5.4. gcc is downloaded and installed automatically

Miller's Number

The rule of 7 +- 2 (also known as Miller's Number) derives from psychology research, which shows that the number of informaiton "chunks" that a person can remember and manipulate at one time varies between five and nine. A larger number of chunks causes information overload. Information chunks can be many things, including names, words in a list, digits, or components of a picture.
( p215, J. Satzinger, R. Jackson, S. Burd, Systems Analysis & Design in a changing world, Thompson )

Douglas Engelbart

コンピュータは人間を進化させるか/アラン・ケイ氏インタビュー

マウスの父、ダグラス・エンゲルバート氏インタビュー

Doug Engelbart 1968 Demo