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IP over USB Build Status

This repository contains the STM32 embedded firmware demonstration of a virtual network with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface. It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol) and a low-cost IP stack development platform.

There are two possible supported software configurations:

  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.

How to use

  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home

Features

  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application

About

STM32 lwIP networking via USB

Topics

cdc-ncmip-over-usblwipstm32usb

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Readme
Apache-2.0 license
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83 stars

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3 watching

Forks

17 forks
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
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Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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IP over USB Build Status
This repository contains the STM32 embedded firmware demonstration of a virtual network
with a single lwIP server (DNS, DHCP, HTTP) presented on the USB network adapter interface.
It's meant to be a starting point for IP over USB applications (using CDC-NCM protocol)
and a low-cost IP stack development platform.
There are two possible supported software configurations:
  1. A bare-metal implementation using the lwIP native API.
  2. An RTOS implementation using FreeRTOS and the lwIP netconn API.
How to use
  1. Build and flash the image on an STM32F4DISCOVERY or a 32L476GDISCOVERY (easily portable to other STM32 targets)
  2. Connect to PC via USB
  3. Fix any driver issues, see below
  4. Go to http://www.lwip.home
Features
  • Using NCM implementation of USBDevice (double-buffered, efficient, simple API)
  • lwIP 2.1.0 with additional dummy DHCP server for out of the box operation
  • DNS server implementation allows domain name based access
  • Reprogramming via USB supported by DFU interface (DFU standard implementation to reboot to ROM)
  • FreeRTOS variant allows the choice of any lwIP APIs to be used by the application
About
STM32 lwIP networking via USB
Topics
cdc-ncmip-over-usblwipstm32usb
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
83 stars
Watchers
3 watching
Forks
17 forks
Report repository
Releases
Packages
Contributors
Languages