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What is V-USB?

V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers. For more information please visit http://www.obdev.at/vusb/.

What is in this Repository?

This repository contains the source code of the driver (in the usbdrv subdirectory), examples (in the examples) subdirectory and other things you might need when you design a device using V-USB.

When you check out this repository, the resulting directory is not equivalent to the source code package which can be downloaded at http://www.obdev.at/vusb/. Some files in the source code package are generated by scripts when the package is created. On the other hand, the scripts which generate source files and the package are not contained in the package itself.

If you want to know more about the files and directories, see the file Readme.txt in the top level directory.

How do I Add the Driver to My Project?

In a Makefile

Simply copy the entire usbdrv subdirectory into your project's firmware source code directory. Then edit the firmware's Makefile and add the following object files to your binary:

usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to object files. See the Makefiles in the examples subdirectory for an inspiration.

With PlatformIO

The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder to the src directory of the project:

project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as usual.

In platformio.ini you must make sure that .S files are preprocessed by the "C" preprocessor and then passed to the assembler. .inc and .asmfiles should not be touched, they are included as needed.

Here is a minimal example platformio.ini for a bare metal ATTiny85:

[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

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A Firmware-Only USB implementation for Atmel's AVR Microcontrollers

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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" + '

Skip to content
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
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Custom properties
Stars
1.3k stars
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109 watching
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262 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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
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Custom properties
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1.3k stars
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109 watching
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262 forks
Report repository
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, '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
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
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1.3k stars
Watchers
109 watching
Forks
262 forks
Report repository
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Used by
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
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
Activity
Custom properties
Stars
1.3k stars
Watchers
109 watching
Forks
262 forks
Report repository
Releases
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Used by
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
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
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Custom properties
Stars
1.3k stars
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109 watching
Forks
262 forks
Report repository
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Used by
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, '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
BranchesTags
Repository files navigation
What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

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, '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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What is V-USB?
V-USB is a firmware-only USB driver for Atmel's AVR microcontrollers.
For more information please visit http://www.obdev.at/vusb/.
What is in this Repository?
This repository contains the source code of the driver (in the usbdrv
subdirectory), examples (in the examples) subdirectory and other things
you might need when you design a device using V-USB.
When you check out this repository, the resulting directory is not equivalent
to the source code package which can be downloaded at
http://www.obdev.at/vusb/. Some files in the source code package are generated
by scripts when the package is created. On the other hand, the scripts which
generate source files and the package are not contained in the package itself.
If you want to know more about the files and directories, see the file
Readme.txt in the top level directory.
How do I Add the Driver to My Project?
In a Makefile
Simply copy the entire usbdrv subdirectory into your project's firmware
source code directory. Then edit the firmware's Makefile and add the following
object files to your binary:
usbdrv/usbdrv.o
usbdrv/usbdrvasm.o
usbdrv/oddebug.o

Then make sure that your Makefile contains rules to convert *.S and *.c to
object files. See the Makefiles in the examples subdirectory for an
inspiration.
With PlatformIO
The easiest way to use V-USB in PlatformIO is to just copy the usbdrv folder
to the src directory of the project:
project/
├── platformio.ini
└── src/
├── main.c
├── usbconfig.h
└── usbdrv/
├── usbdrv.c
├── usbdrv.h
├── usbdrvasm.S
├── usbdrvasm*.inc
├── oddebug.c
└── oddebug.h

The usbconfig.h is part of your project. Derive it from the template as
usual.
In platformio.ini you must make sure that .S files are preprocessed by
the "C" preprocessor and then passed to the assembler. .inc and .asmfiles
should not be touched, they are included as needed.
Here is a minimal example platformio.ini for a bare metal ATTiny85:
[env:attiny85]
platform = atmelavr
board = attiny85
board_build.f_cpu = 16500000L ; also reaches usbdrvasm.S as -DF_CPU=...
build_flags =
-Isrc ; explicit, so usbdrv/*.c find usbconfig.h
-Wall
; keep the IAR-syntax assembly file out of the build
build_src_filter =
+<*>
-<usbdrv/usbdrvasm.asm>

About
A Firmware-Only USB implementation for Atmel's AVR Microcontrollers
Resources
Readme
Activity
Custom properties
Stars
1.3k stars
Watchers
109 watching
Forks
262 forks
Report repository
Releases
Packages
Used by
Contributors
Languages