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STM32 bare-metal skill for CMSIS-only MCU projects. An agent skill from mohitmishra786/low-level-dev-skills.
Install Stm32 Baremetal
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetal --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .claude/skills/stm32-baremetal && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .claude/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetalType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetal --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .agents/skills/stm32-baremetal && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .agents/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetal --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .cursor/skills/stm32-baremetal && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .cursor/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mohitmishra786/low-level-dev-skills.git --path skills/baremetal/stm32-baremetal--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetal --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .gemini/skills/stm32-baremetal && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .gemini/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetalInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .github/skills/stm32-baremetal && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .github/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills stm32-baremetal --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/baremetal/stm32-baremetal .opencode/skills/stm32-baremetal && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "stm32-baremetal" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/baremetal/stm32-baremetal into .opencode/skills/stm32-baremetal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stm32-baremetal", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
stm32-baremetal- GitHub stars
- 252
- Token cost
- ~1.1k tokens
- SKILL.md length
- 302 words
- Files
- 1
- Skills in repo
- 138
- Repo updated
- First seen
- Licence
- MIT
At a glance
STM32 bare-metal skill for CMSIS-only MCU projects. An agent skill from mohitmishra786/low-level-dev-skills.
- Works in 7 steps: Minimal project layout → Clock configuration (RCC) → Enable peripheral clock before MMIO → …
- Scaffolding STM32 firmware without HAL
- SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Stm32 Baremetal is an agent skill from mohitmishra786/low-level-dev-skills. STM32 bare-metal skill for CMSIS-only MCU projects. Use when scaffolding STM32 firmware without HAL, configuring clocks/RCC, using CMSIS headers, or building with arm-none-eabi-gcc. Activates on queries about STM32 bare metal, CMSIS without HAL, STM32F4/H7 bring-up, or minimal Makefile CMake for Cortex-M.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Project scaffolding. It works with C++. The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.
When your agent uses it
- Scaffolding STM32 firmware without HAL
- Configuring clocks/RCC
- Using CMSIS headers
- Building with arm-none-eabi-gcc
Example prompts
- “/stm32-baremetal”
Workflow steps
7 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are c and makefile).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
qemu.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Stm32 Baremetal loads about 1.1k tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 302 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 302 words, ~1,093 tokens.
Download SKILL.mdSave it as
.claude/skills/stm32-baremetal/SKILL.md (or your agent's skills folder).- name
- stm32-baremetal
- description
- STM32 bare-metal skill for CMSIS-only MCU projects. Use when scaffolding STM32 firmware without HAL, configuring clocks/RCC, using CMSIS headers, or building with arm-none-eabi-gcc. Activates on queries about STM32 bare metal, CMSIS without HAL, STM32F4/H7 bring-up, or minimal Makefile CMake for Cortex-M.
STM32 Bare-Metal (CMSIS, No HAL)
Purpose
Guide agents through a minimal STM32 bare-metal project using CMSIS device headers and startup code only — no STM32 HAL — covering clock setup, linker script integration, peripheral register access, and a reproducible build layout for STM32F/G/H/L families.
When to Use
- Starting STM32 firmware without Cube HAL dependency
- Porting vendor examples to register-level drivers
- Integrating with
skills/baremetal/baremetal-startupandskills/embedded/linker-scripts - Debugging clock or flash placement issues on STM32
- Teaching register-level STM32 before RTOS or Zephyr
Workflow
1. Minimal project layout
stm32-bare/
├── startup_stm32f407xx.s # vector table + Reset_Handler
├── system_stm32f4xx.c # SystemInit(), SystemCoreClockUpdate()
├── stm32f407xx.h # CMSIS (from ST pack or copy)
├── linker.ld # FLASH/RAM regions
├── main.c
└── MakefileUse CMSIS-Core (core_cm4.h) and device header from ST CMSIS pack or open-source packs (e.g. stm32-cmsis-device-f4).
2. Clock configuration (RCC)
STM32 requires explicit HSE/HSI and PLL setup before high-speed peripherals:
/* system_stm32f4xx.c — simplified PLL from 8 MHz HSE */
void SystemInit(void)
{
RCC->CR |= RCC_CR_HSEON;
while (!(RCC->CR & RCC_CR_HSERDY)) {}
RCC->PLLCFGR = RCC_PLLCFGR_PLLSRC_HSE | (8 << 0) | (336 << 6) | (0 << 16) | (7 << 24);
RCC->CFGR |= RCC_CFGR_PPRE1_DIV2 | RCC_CFGR_PPRE2_DIV1 | RCC_CFGR_HPRE_DIV1;
RCC->CR |= RCC_CR_PLLON;
while (!(RCC->CR & RCC_CR_PLLRDY)) {}
FLASH->ACR = FLASH_ACR_LATENCY_5WS;
RCC->CFGR |= RCC_CFGR_SW_PLL;
while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_PLL) {}
SystemCoreClockUpdate();
}Always match FLASH_ACR wait states to voltage scale and SYSCLK per reference manual table.
3. Enable peripheral clock before MMIO
#define RCC_AHB1ENR_GPIOAEN (1U << 0)
static inline void gpioa_clock_enable(void)
{
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
(void)RCC->AHB1ENR; /* AHB read-after-write — required on STM32 */
}4. Build flags (arm-none-eabi-gcc)
MCU = -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CFLAGS = $(MCU) -Wall -Wextra -ffunction-sections -fdata-sections -g3
LDFLAGS = $(MCU) -T linker.ld -Wl,--gc-sections -specs=nano.specs -lc -lm -lnosys5. Flash map (typical F4)
| Region | Address | Notes |
|---|---|---|
| Flash | 0x08000000 | Vector table at boot |
| SRAM1 | 0x20000000 | Stack, heap, .data/.bss |
| CCM | 0x10000000 | F4 only — not DMA-accessible from all masters |
Bootloader apps often link at 0x08010000 and set SCB->VTOR = 0x08010000 on entry.
6. QEMU note
QEMU STM32 machines (stm32vldiscovery, netduinoplus2, etc.) use different MCUs than F407 and omit GPIO/DMA/I2C per QEMU STM32 docs. Use skills/qemu/qemu-embedded-simulation for simulation; validate F4 firmware on hardware.
7. Agent usage
/stm32-baremetal Scaffold CMSIS-only STM32F407 project with USART2 printfCommon Problems
| Symptom | Cause | Fix |
|---|---|---|
Hang in SystemInit | HSE not populated / wrong PLL | Use HSI for bring-up; verify crystal |
| Peripheral dead | RCC clock gate off | Enable AHB/APB bit; read-back RCC |
| HardFault on boot | Stack in wrong region / VTOR | Check _estack in linker.ld |
| Wrong baud rate | SystemCoreClock stale | Call SystemCoreClockUpdate() after PLL |
| DMA fails from CCM | CCM not on AHB matrix path | Place DMA buffers in SRAM1 |
Related Skills
skills/baremetal/baremetal-startup— vector table and.data/.bssskills/baremetal/mmio-and-bit-manipulation— register access patternsskills/baremetal/bootloaders-embedded— app offset and VTOR relocationskills/embedded/linker-scripts— FLASH/RAM MEMORY blocksskills/embedded/openocd-jtag— flash and GDB via ST-Link
© mohitmishra786, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/baremetal/stm32-baremetal of mohitmishra786/low-level-dev-skills.
Open the folder on GitHubat commit bdc5847
Compare with similar skills
Stm32 Baremetal next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Stm32 Baremetal this skillmohitmishra786/low-level-dev-skills | 252 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Add Ophw-native-sys/pypto | 127 | — | ~2k | Automated safety check: Pass | Custom licence | |
| Setup Game Mod Devclshortfuse/renodx | 4.5k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Simulink Configure Model For Code Generationmatlab/simulink-agentic-toolkit | 1.2k | — | ~5.4k | Automated safety check: Pass | Custom licence | |
| Tilelang Ascend Tile APItile-ai/tilelang-ascend | 403 | — | ~1.5k | Automated safety check: Pass | MIT | |
| Matlab Generate Codematlab/matlab-agentic-toolkit | 1.1k | — | ~4.2k | Automated safety check: Pass | Custom licence |
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Related
Works with
Categories
Questions about Stm32 Baremetal
What does Stm32 Baremetal do?
STM32 bare-metal skill for CMSIS-only MCU projects. An agent skill from mohitmishra786/low-level-dev-skills. Stm32 Baremetal is an agent skill from mohitmishra786/low-level-dev-skills. STM32 bare-metal skill for CMSIS-only MCU projects.
When should I use Stm32 Baremetal?
Stm32 Baremetal fits situations like: scaffolding STM32 firmware without HAL; configuring clocks/RCC; using CMSIS headers; building with arm-none-eabi-gcc.
How do I install Stm32 Baremetal in Claude Code?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a claude-code`. Or copy the skill folder (skills/baremetal/stm32-baremetal in mohitmishra786/low-level-dev-skills) into .claude/skills/stm32-baremetal in your project. Claude Code loads it when a task matches its description.
How do I install Stm32 Baremetal in Codex?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a codex`. Or copy the skill folder (skills/baremetal/stm32-baremetal in mohitmishra786/low-level-dev-skills) into .agents/skills/stm32-baremetal in your project. Codex loads it when a task matches its description.
Can I use Stm32 Baremetal in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill stm32-baremetal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/stm32-baremetal, .gemini/skills/stm32-baremetal, .github/skills/stm32-baremetal and .opencode/skills/stm32-baremetal in your project.
What does Stm32 Baremetal need to run?
SKILL.md names no scripts, command-line tools or credentials: Stm32 Baremetal is instructions for the agent only.
Does Stm32 Baremetal access the network?
SKILL.md names 1 domain. As links in the text: qemu.org. This is read from the text; nothing was executed.
Is Stm32 Baremetal safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Stm32 Baremetal use?
Stm32 Baremetal is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Stm32 Baremetal use?
About 1.1k tokens (SKILL.md is roughly 4.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Stm32 Baremetal?
Skills that share tags, products or a category with Stm32 Baremetal: Add Op (hw-native-sys/pypto, 127 stars), Setup Game Mod Dev (clshortfuse/renodx, 4.5k stars), Simulink Configure Model For Code Generation (matlab/simulink-agentic-toolkit, 1.2k stars) and Tilelang Ascend Tile API (tile-ai/tilelang-ascend, 403 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Stm32 Baremetal?
mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 252 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.
Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.