Fix date tag h5 and broken html.

author: Sadeep Madurange <sadeep@asciimx.com> 2025-12-31 21:51:40 +0800
committer: Sadeep Madurange <sadeep@asciimx.com> 2025-12-31 21:51:40 +0800
commit: 99a21a1bf35c5af6188abdcb87e894b371bbffa5 (patch)
tree: 294f4e6a90150fb3b478c06576e147c9f24540b4 /_site/log
parent: 94a42f4e48e5371462fccf92a6e94155951d97d4 (diff)
download: www-99a21a1bf35c5af6188abdcb87e894b371bbffa5.tar.gz
12 files changed, 18 insertions, 235 deletions
diff --git a/_site/log/arduino-due/index.html b/_site/log/arduino-due/index.html
index a2135cb..970136d 100644
--- a/_site/log/arduino-due/index.html
+++ b/_site/log/arduino-due/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>ATSAM3X8E bare-metal programming</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,27 +41,17 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">ATSAM3X8E BARE-METAL PROGRAMMING</h2>
-          <h6 class="center">16 SEPTEMBER 2024</h5>
+          <h5 class="center">16 SEPTEMBER 2024</h5>
           <br>
-          <div class="twocol justify"><p>Notes on programming ATSAM3X8E chips (Arduino Due) without bootloader. Tested
-on OpenBSD.</p>
+          <div class="twocol justify"><p>Notes on programming bare-metal ATSAM3X8E chips (Arduino Due) using Serial Wire
+Debug (SwD) protocol.</p>
 
 <h2 id="toolchain">Toolchain</h2>
 
-<p>Need to bypass embedded bootloader—requires hardware programmer that speaks
-Serial Wire Debug (SWD). ST-LINK/V2 works as SWD-USB adapter.</p>
-
-<p>OpenOCD translates commands to binary sequences the chip understands. Runs
-telnet server on startup for issuing commands.</p>
-
-<p>ARM GNU Compiler Toolchain for compiling C programs. Both OpenOCD and ARM
-toolchain available on OpenBSD.</p>
+<p>ST-LINK/V2 programmer, OpenOCD, ARM GNU Compiler Toolchain.</p>
 
 <h2 id="electrical-connections">Electrical connections</h2>
 
-<p>Arduino Due exposes ATSAM3X8E’s SWD interface via DEBUG port. ST-LINK/V2
-connects there.</p>
-
 <table style="border: none; width: 100%;">
   <tr style="border: none;">
     <td style="border: none; width: 50%; vertical-align: top; background-color: transparent;">
@@ -86,8 +70,7 @@ ST-LINK/v2 programmer connects to that to communicate with the chip.</p>
 
 <h2 id="upload-procedure">Upload procedure</h2>
 
-<p>Sample LED blink program with OpenOCD config and linker scripts in tarball
-below.</p>
+<p>Build. Magic is in the script.ld linker script.</p>
 
 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -T script.ld \
     -nostartfiles \
@@ -95,7 +78,7 @@ below.</p>
     -o a.elf main.c
 </code></pre></div></div>
 
-<p>Upload:</p>
+<p>Upload using OpenOCD:</p>
 
 <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ openocd -f openocd-due.cfg
 $ telnet localhost 4444
@@ -124,8 +107,8 @@ GPNVM2=0: flash0 (0x80000) maps to 0x00000. Both cleared: flash1 maps to
 
 <h2 id="linker-script-notes">Linker script notes</h2>
 
-<p>Vector table must be at first flash address–mandatory for ARM chips unless
-using VTOR register for relocation.</p>
+<p>Vector table must be at first flash address–required for ARM chips unless
+relocated using VTOR register.</p>
 
 <p>First vector table entry: stack pointer. Initialize to highest memory location
 (ATSAM3X8E has descending stack).</p>
diff --git a/_site/log/arduino-uno/index.html b/_site/log/arduino-uno/index.html
index 66fff37..33ca118 100644
--- a/_site/log/arduino-uno/index.html
+++ b/_site/log/arduino-uno/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>ATmega328P at 3.3V and 5V</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">ATMEGA328P AT 3.3V AND 5V</h2>
-          <h6 class="center">10 JUNE 2025</h5>
+          <h5 class="center">10 JUNE 2025</h5>
           <br>
           <div class="twocol justify"><p>Quick reference for wiring ATmega328P ICs at 5V and 3.3V. 5V uses 16MHz
 crystal, 3.3V uses 8MHz.</p>
diff --git a/_site/log/bumblebee/index.html b/_site/log/bumblebee/index.html
index b4c9c25..9d12851 100644
--- a/_site/log/bumblebee/index.html
+++ b/_site/log/bumblebee/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Bumblebee: browser automation</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">BUMBLEBEE: BROWSER AUTOMATION</h2>
-          <h6 class="center">02 APRIL 2025</h5>
+          <h5 class="center">02 APRIL 2025</h5>
           <br>
           <div class="twocol justify"><p>Built with Andy Zhang for an employer. Tool to automate web scraping script
 generation.</p>
diff --git a/_site/log/e-reader/index.html b/_site/log/e-reader/index.html
index 44ae1e6..2d76f26 100644
--- a/_site/log/e-reader/index.html
+++ b/_site/log/e-reader/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>ESP32 e-reader prototype</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">ESP32 E-READER PROTOTYPE</h2>
-          <h6 class="center">24 OCTOBER 2023</h5>
+          <h5 class="center">24 OCTOBER 2023</h5>
           <br>
           <div class="twocol justify"><p>First project with e-paper displays and ESP32.</p>
 
diff --git a/_site/log/etlas/index.html b/_site/log/etlas/index.html
index 8149618..97f0ff8 100644
--- a/_site/log/etlas/index.html
+++ b/_site/log/etlas/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Etlas: e-paper dashboard</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">ETLAS: E-PAPER DASHBOARD</h2>
-          <h6 class="center">05 SEPTEMBER 2024</h5>
+          <h5 class="center">05 SEPTEMBER 2024</h5>
           <br>
           <div class="twocol justify"><p>Repurposed <a href="../e-reader/">e-reader prototype</a> into something for regular use.
 News, stocks, weather dashboard.  ESP32 NodeMCU D1 + 7.5” Waveshare e-paper +
diff --git a/_site/log/fpm-door-lock-lp/index.html b/_site/log/fpm-door-lock-lp/index.html
index a5d237c..8d1c721 100644
--- a/_site/log/fpm-door-lock-lp/index.html
+++ b/_site/log/fpm-door-lock-lp/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Fingerprint door lock (LP)</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">FINGERPRINT DOOR LOCK (LP)</h2>
-          <h6 class="center">18 AUGUST 2025</h5>
+          <h5 class="center">18 AUGUST 2025</h5>
           <br>
           <div class="twocol justify"><p>Second iteration of the <a href="../fpm-door-lock-rf">RF door lock</a>. Old version worked
 but drew too much quiescent current. Sensor and servo pulled 13.8mA and 4.6mA
diff --git a/_site/log/fpm-door-lock-rf/index.html b/_site/log/fpm-door-lock-rf/index.html
index 04c84de..342fa44 100644
--- a/_site/log/fpm-door-lock-rf/index.html
+++ b/_site/log/fpm-door-lock-rf/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Fingerprint door lock (RF)</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">FINGERPRINT DOOR LOCK (RF)</h2>
-          <h6 class="center">05 JUNE 2025</h5>
+          <h5 class="center">05 JUNE 2025</h5>
           <br>
           <div class="twocol justify"><p>Wanted to unlock door with fingerprint, wirelessly to avoid drilling.</p>
 
diff --git a/_site/log/index.html b/_site/log/index.html
index defcfed..955f645 100644
--- a/_site/log/index.html
+++ b/_site/log/index.html
@@ -51,19 +51,6 @@
   
       <tr>
         <td class="posts-td posts-td-link">
-          <a href="/log/search-with-cgi/" class="link-decor-none">Site search using Perl + CGI</a>
-        </td>
-        <td class="posts-td posts-td-time">
-          <span class="post-meta">
-            <time datetime="2025-12-29 00:00:00 +0800">2025-12-29</time>
-          </span>
-        </td>
-      </tr>
-  
-    
-  
-      <tr>
-        <td class="posts-td posts-td-link">
           <a href="/log/matrix-digital-rain/" class="link-decor-none">Matrix Rain: 2025 refactor</a>
         </td>
         <td class="posts-td posts-td-time">
diff --git a/_site/log/matrix-digital-rain/index.html b/_site/log/matrix-digital-rain/index.html
index a570230..86d918d 100644
--- a/_site/log/matrix-digital-rain/index.html
+++ b/_site/log/matrix-digital-rain/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Matrix Rain: 2025 refactor</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">MATRIX RAIN: 2025 REFACTOR</h2>
-          <h6 class="center">21 DECEMBER 2025</h5>
+          <h5 class="center">21 DECEMBER 2025</h5>
           <br>
           <div class="twocol justify"><p>The 2022 version worked but had some loose ends. Unicode support was
 inflexible–couldn’t mix ASCII with Katakana; Phosphor decay was stored in a
diff --git a/_site/log/mosfet-switches/index.html b/_site/log/mosfet-switches/index.html
index 37d6707..e3a6868 100644
--- a/_site/log/mosfet-switches/index.html
+++ b/_site/log/mosfet-switches/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>High-side MOSFET switching</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,7 +41,7 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">HIGH-SIDE MOSFET SWITCHING</h2>
-          <h6 class="center">22 JUNE 2025</h5>
+          <h5 class="center">22 JUNE 2025</h5>
           <br>
           <div class="twocol justify"><p>Needed low-power switching for the <a href="../fpm-door-lock-lp/">fingerprint door
 lock</a>. Servo and FPM draw high quiescent current–had to
diff --git a/_site/log/neo4j-a-star-search/index.html b/_site/log/neo4j-a-star-search/index.html
index 013cd95..4154255 100644
--- a/_site/log/neo4j-a-star-search/index.html
+++ b/_site/log/neo4j-a-star-search/index.html
@@ -1,9 +1,5 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <meta charset="utf-8">
-    <title>Neo4j shortest path optimization</title>
-
     <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -13,8 +9,6 @@
 </head>
 
 
-
-  </head>
   <body>
 
     <div id="nav-container" class="container">
@@ -47,9 +41,9 @@
       <div class="container">
         <div class="container-2">
           <h2 class="center" id="title">NEO4J SHORTEST PATH OPTIMIZATION</h2>
-          <h6 class="center">06 MARCH 2018</h5>
+          <h5 class="center">06 MARCH 2018</h5>
           <br>
-          <div class="twocol justify"><p>Replaced Dijkstra’s for vessel route tracking in Neo4J.</p>
+          <div class="twocol justify"><p>Replaced Dijkstra’s search for vessel route tracking in Neo4J.</p>
 
 <p>Tracking 13,000 marine vessel route points. Needed shortest paths between ports
 for arrival prediction. Neo4j’s Dijkstra’s algorithm slows after 4,000 route
diff --git a/_site/log/search-with-cgi/index.html b/_site/log/search-with-cgi/index.html
deleted file mode 100644
index 71b9f23..0000000
--- a/_site/log/search-with-cgi/index.html
+++ /dev/null
@@ -1,133 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset="utf-8">
-    <title>Site search using Perl + CGI</title>
-
-    <head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Site search using Perl + CGI</title>
-  <link rel="stylesheet" href="/assets/css/main.css">
-  <link rel="stylesheet" href="/assets/css/skeleton.css">
-</head>
-
-
-
-  </head>
-  <body>
-
-    <div id="nav-container" class="container">
-  <ul id="navlist" class="left">
-    
-    <li >
-      <a href="/" class="link-decor-none">hme</a>
-    </li>
-    <li class="active">
-      <a href="/log/" class="link-decor-none">log</a>
-    </li>
-    <li >
-      <a href="/projects/" class="link-decor-none">poc</a>
-    </li>
-    <li >
-      <a href="/about/" class="link-decor-none">abt</a>
-    </li>
-    <li>
-      <a href="/cgi-bin/find.cgi" class="link-decor-none">sws</a>
-    </li>
-    <li>
-      <a href="/feed.xml" class="link-decor-none">rss</a>
-    </li>
-  </ul>
-</div>
-
-
-
-    <main>
-      <div class="container">
-        <div class="container-2">
-          <h2 class="center" id="title">SITE SEARCH USING PERL + CGI</h2>
-          <h6 class="center">29 DECEMBER 2025</h5>
-          <br>
-          <div class="twocol justify"><p>Number of articles on the site are growing. Need a way to search site.</p>
-
-<p>Searching the RSS feed client-side using JavaScript is not an option. That
-would make the feed much heavier and break the site for text-based web browsers
-like Lynx.</p>
-
-<p>Not gonna use an inverted index–More than an evening’s effort, especially if I
-want partial matching. I want partial matching.</p>
-
-<p>Few lines of Perl could do a regex search and send the result back via CGI.
-OpenBSD httpd speaks CGI. Perl and slowcgi are in the base system. No
-dependencies.</p>
-
-<p>Perl: traverse directory with File::Find. If search text is found grab the file
-name, title and up to 50 chars from the first paragraph to include in the
-search result.</p>
-
-<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>find({
-    wanted =&gt; sub {
-        return unless -f $_ &amp;&amp; $_ eq 'index.html';
-        # ... file reading ...
-        if ($content =~ /\Q$search_text\E/i) {
-            # Extract title, snippet
-            push @results, { 
-                path    =&gt; $File::Find::name,
-                title   =&gt; $title, 
-                snippet =&gt; $snippet 
-            };
-        }
-    },
-    follow =&gt; 0,
-}, $dir);
-</code></pre></div></div>
-
-<p>httpd sets the search text in QUERY_STRING env. Don’t need Perl’s CGI module.</p>
-
-<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>my %params;
-if ($ENV{QUERY_STRING}) {
-    foreach my $pair (split /&amp;/, $ENV{QUERY_STRING}) {
-        my ($key, $value) = split /=/, $pair;
-        $value =~ tr/+/ /;
-        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
-        $params{$key} = $value;
-    }
-}
-</code></pre></div></div>
-
-<p>Security.</p>
-
-<p>ReDOS, XSS, command injection, symlink attacks. Did I miss anything? Probably.</p>
-
-<p>ReDOS: sanitized user input, length-limit search text, quote metacharacters
-with <code class="language-plaintext highlighter-rouge">\Q$search_text\E</code>.</p>
-
-<p>XSS: sanitized user input. Escaped HTML.</p>
-
-<p>Command injection: no exec()/system() calls. Non-privileged user (www).</p>
-
-<p>Symlink attacks: File::Find don’t follow symlinks (follow =&gt; 0). chroot.</p>
-
-<p>Access controls: files (444), directories and CGI script: 554.</p>
-
-<p>Verdict: O(n) speed. Works on every conceivable browser. Good enough.</p>
-
-<p>Commit: <a href="https://git.asciimx.com/www/commit/?h=term&amp;id=9fec793abe0a73e5cd502a1d1e935e2413b85079">9fec793</a></p>
-</div>
-          <p class="post-author right">by W. D. Sadeep Madurange</p>
-        </div>
-      </div>
-    </main>
-
-    <div class="footer">
-  <div class="container">
-    <div class="twelve columns right container-2">
-      <p id="footer-text">&copy; ASCIIMX - 2025</p>
-    </div>
-  </div>
-</div>
-
-
-  </body>
-</html>
author	Sadeep Madurange <sadeep@asciimx.com>	2025-12-31 21:51:40 +0800
committer	Sadeep Madurange <sadeep@asciimx.com>	2025-12-31 21:51:40 +0800
commit	99a21a1bf35c5af6188abdcb87e894b371bbffa5 (patch)
tree	294f4e6a90150fb3b478c06576e147c9f24540b4 /_site/log
parent	94a42f4e48e5371462fccf92a6e94155951d97d4 (diff)
download	www-99a21a1bf35c5af6188abdcb87e894b371bbffa5.tar.gz