Embedded Systems: Code Meets Hardware
Like Duolingo, but for Embedded Systems: Code Meets Hardware. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
25 levels across 4 sections, about 50 minutes end to end, roughly 10 days at five minutes a day. It moves through Writing Responsive Firmware, Conditioning Inputs and Bus Communication, Controlling Power and Motion, and Diagnostics and Power Integrity. It assumes you already know the basics.
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Key ideas in Embedded Systems: Code Meets Hardware
- delay() runs a busy-wait CPU loop that burns clock cycles doing nothing
- Standard digitalRead polling cannot execute while the core is trapped in a delay
- Short physical pulses pass completely undetected if no code polls the pin during them
- Monotonic counters increment continuously via a background hardware timer
- Subtracting previousMillis from currentMillis avoids rollover bugs when the counter wraps
- Checking an elapsed difference leaves the CPU free to run other instructions every iteration
- Every loop pass starts by sampling the master clock counter once for consistency
- Each peripheral task checks its own independent threshold without waiting on others
- Timestamps must update immediately upon task trigger to schedule the next window
- Each hardware peripheral requires its own dedicated 'previousMillis' state variable
- Slow sensor buses can poll every few seconds while input debounce runs at 20 ms
- State tracking variables preserve peripheral state across loop passes
- Timer interrupts preempt the main loop immediately when hardware counters overflow
- Main-loop polling suffers from variable latency caused by other task code execution
- The execution order of a cooperative polling loop handling multiple peripherals
- Sub-millisecond signal generation demands ISRs to prevent timing jitter
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Embedded Systems: Code Meets Hardware the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why won't a standard digitalRead() call run during a delay(1000)?
Get it right to open this lesson and 24 more in the app.
Where Embedded Systems: Code Meets Hardware takes you
Bridge the gap between pure software and physical circuits. Learn how to write non-blocking firmware, interface digital sensors over standard buses, safely drive high-power loads, and diagnose hardware bugs.
- 1
Writing Responsive Firmware
- Escaping the Blocking Loop
- Managing Behavior with State Machines
- 2
Conditioning Inputs and Bus Communication
- Taming Noisy Real-World Inputs
- Talking Over I2C, SPI, and UART
- 3
Controlling Power and Motion
- Switching High-Current Loads
- Actuation and Motor Control
- 4
Diagnostics and Power Integrity
- Hardware-Level Signal Debugging
- Power Integrity and Energy Budgets
4 sections · 8 units · 25 levels. Built to play, not to enroll.
You pick the voice
Embedded Systems: Code Meets Hardware is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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