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EMBEDDED FIRMWARE
Embedded firmware development & improvement
We work with your schematics, boards and source code to define device behavior. Scope can cover motor and sensor control, BLE, state machines and fault handling, through hardware–firmware review, testing and handover.
WHERE WE START
Where is your product today?
An existing product
You need fixes, additional functions or a maintainable structure for existing code.
A changed board
A board revision or component change requires a review of schematics, code and device behavior.
DEVELOPMENT & INTEGRATION
Start with the scope your product needs
New firmware development
Implement MCU initialization, peripheral drivers, operating modes, buttons, displays and alerts around your requirements.
Typical deliverablesBehavior design · source code · build setup
Firmware analysis & improvement
Review the build and execution paths, fix defects and add functions. Assess board changes and code restructuring.
Typical deliverablesAnalysis findings · revised code · change log
Device control & connectivity
Implement motor, sensor, PWM and timer behavior plus interfaces such as BLE, UART, SPI and I2C as required by the product.
Typical deliverablesControl logic · interface definitions · integration tests
Hardware–firmware review & testing
Compare schematic pin assignments with code and review start, stop and exception behavior. Record host and physical-board tests separately.
Typical deliverablesCompatibility review · test results · open issues
ENGINEERING DEPTH
Six disciplines behind device behavior
Beyond individual drivers, we define control timing, data flow, exception handling and the way people operate the product.
MOTION CONTROL
Motor & encoder control
Review PWM control, encoder feedback and PID timing. Define acceleration, deceleration, direction changes, homing and missing-pulse detection for the device.
PWM · Timer · Encoder · PIDSENSING & ACQUISITION
Sensors & ADC acquisition
Review sampling, channel switching, filtering, contact detection and calibration. Align firmware acquisition timing with the circuit’s signal-settling requirements.
ADC · MUX · Filtering · CalibrationDEVICE CONNECTIVITY
BLE & device communication
Define command/status packets, timing, acknowledgements, timeouts and retries. Address disconnection behavior and state consistency after reconnection.
BLE · UART · SPI · I2CPRODUCT BEHAVIOR
State machines & device UI
Separate start, pause, completion and fault states. Align short/long button presses, displays, alerts and battery indicators with actual device behavior.
State machine · Button · Display · BuzzerFAULT HANDLING
Output control & exceptions
Define sensor-fault, low-voltage and charging conditions, plus watchdog/reset recovery. Consolidate output control and review conflicting commands.
Interlock · Watchdog · Reset · Power stateCODE MODERNIZATION
Legacy code & refactoring
Identify active build sources and execution paths. Separate BSP, drivers and product logic; document board revisions, pin assignments, build settings and changes.
C/C++ · BSP/HAL · Build · RegressionAPPLICATIONS
Products and engineering challenges we can scope
These service examples generalize technical challenges addressed in our review materials. Implementation and testing scope is agreed for each product.
01 / CONNECTED MOTION
Wireless motor-driven devices
Products that must align target speed, actual motion and status across a controller and wireless device.
Engineering focus
- Encoder scaling, loop timing, speed ramps and direction changes
- BLE commands, responses, disconnects and reconnection
- Consistent controls, display, battery and motion states
What we documentControl sequences · protocol definitions · verification items
02 / MULTI-MODE DEVICE
Equipment with multiple operating modes
Products that need coordinated user commands, sensor conditions and output sequences.
Engineering focus
- Mode selection, start, pause and shutdown states
- Output permission under contact, charging and sensor conditions
- Separate UI and output management; define fault recovery
What we documentState transitions · output conditions · requirements-to-test matrix
03 / SENSOR ACQUISITION
Multi-channel sensor boards
Systems whose analog input characteristics and MCU acquisition settings must work together.
Engineering focus
- ADC sampling, MUX switching and signal-settling review
- I2C sensor and USB interface requirements against the circuit
- Startup, power sequencing, acquisition and transfer requirements
What we documentH/W–F/W interface conditions · open questions · test plan
HARDWARE–FIRMWARE REVIEW
Find the gaps between circuits and code
Matching pins do not guarantee matching behavior. We compare schematics, component documentation, active sources and build artifacts to identify integration issues.
Pin mapping & control meaning
What does a stop command actually switch off?Compare GPIO names, polarity, driver truth tables and power paths. Distinguish output-level changes, motor stops and actual power disconnection.
Active build & execution paths
Does the function under review actually run?Check project settings, linker maps and call paths to identify active code. Review whether legacy files and comments describe the implementation in use.
Sensing, timing & units
Do measurements and control timing agree?Compare encoder scaling, gear ratio, PID timing and ADC conversion. Review the combined delay from circuit filtering, sampling and accumulated fault decisions.
Fault stops & recovery
What state follows a disconnect or reset?Review missing pulses, communication loss, charging, watchdog and reset paths. Separate software stopping from hardware cutoff and define restart conditions.
ARCHITECTURE & VERIFICATION
Separate product decisions from hardware control
Clear responsibilities make product behavior easier to trace and test when the board changes.
- 01
Product behavior
Modes · state transitions · user actions
- 02
Control & communication
Algorithms · packets · output permission
- 03
BSP & drivers
Pin mapping · timers · ADC · peripherals
- 04
Board & devices
MCU · motor · sensors · display
Evidence with a clear verification scope
- Code & circuit review
Requirements, pin assignments, active sources and execution paths
- Reproducible build
Toolchain, SDK, settings, binaries and change history
- Host & regression tests
State transitions, boundaries and exceptional inputs
- Board & integration tests
Measurement conditions, instruments, traces and acceptance criteria
Activities depend on the agreed scope and available test setup. Code, build and host-test results are reported separately from physical-board measurements.
HOW WE WORK
Agree on behavior. Hand over with test evidence.
- 01Review inputs
Check requirements, schematics, board revisions, source code and build setup.
- 02Define behavior
Agree on states, control, interfaces, exceptions and acceptance criteria.
- 03Develop & test
Implement and run regression tests, then verify on boards under agreed conditions.
- 04Hand over
Deliver source, binaries, documentation, test results and outstanding issues.
SCOPE & DELIVERY
Deliverables and pricing basis
Agreed deliverables
The proposal specifies source code, build configuration, binaries, behavior/interface documents, changes and test results. SDK and third-party sources follow their applicable terms.
Quoted after review
Pricing depends on source/build availability, MCU and board count, control and interface complexity, code condition and physical test requirements.
Separately scoped work
Circuit redesign, PCB fabrication, prototypes, test fixtures, accredited testing, certification and on-site support are scoped and priced separately.
Clearly defined verification
Code reviews, builds, host tests and physical-board tests are reported separately, with unverified items and further checks identified.
FIRMWARE QUESTIONS
Questions about commissioning firmware development
Can you develop firmware for an existing board?
Yes. We review firmware scope using your schematics, board and MCU information, and identify any work that requires hardware changes separately.
Can you modify or take over existing firmware?
We first review the source, build setup and available SDKs. We agree on fixes, new functions or board changes, together with reproducible build and handover requirements.
Do you develop motor-control and BLE firmware?
We can assess motor and sensor control and communication such as BLE. Scope depends on the MCU, drivers, protocol, response requirements and physical-board test conditions.
How are MCU firmware cost and schedule determined?
They depend on required behavior, existing code, MCU and board count, physical test setup and deliverables. We propose costs and milestones after reviewing your materials.
LET’S BUILD TOGETHER
Start with the materials you have
Share available schematics, board/MCU information, source and build instructions, desired behavior or problem symptoms. We will identify additional information after the initial review.