C practice in Embedded Systems

Browse the rooms before signing in. All rooms are free with an account. Practice does not issue certificates.

• Bit Flip on the Factory Floor

  Firmware engineer racing an OTA lockout window.

  bits-registers. Free with an account.

• Field Extract

  Firmware engineer unblocking a motor-driver diagnostic tool.

  bits-registers. Free with an account.

• Silent GPIO

  Firmware engineer fixing a smart-lock LED before the shift change.

  gpio. Free with an account.

• Watchdog Countdown

  Firmware engineer stopping a reboot loop in the field.

  bits-registers. Free with an account.

• Dimmer Gone Dark

  Firmware engineer restoring hotel corridor lighting before morning.

  timers-pwm. Free with an account.

• Overflow Alarm

  Firmware engineer clamping a sump-pump timer before the next cycle.

  timers-pwm. Free with an account.

• Parity Check on the Line

  Firmware engineer un-jamming a conveyor after a UART collision.

  serial. Free with an account.

• Sensor in the Cold

  Firmware engineer stopping a false emergency alert from an outdoor station.

  adc-sensors. Free with an account.

• ADC Noise Floor

  Firmware engineer recalibrating a pulse-oximeter before the audit.

  adc-sensors. Free with an account.

• CRC Mismatch in the Field

  Firmware engineer restoring gas-meter communication before meters go dark.

  serial. Free with an account.

• Interrupt Mask Lockout

  Firmware engineer un-sticking a robot arm before the safety audit.

  interrupts-scheduling. Free with an account.

• Ring Buffer Rollover

  Firmware engineer securing telemetry before a satellite pass.

  memory. Free with an account.

• Debounce or Die

  Firmware engineer silencing phantom e-stop triggers before line shutdown.

  gpio. Free with an account.

• PID Runaway

  Firmware engineer patching 30 drones before the next flight window.

  control. Free with an account.

• Scheduler Slip

  Firmware engineer fixing 16-bit tick overflow before a clinical trial dataset is lost.

  interrupts-scheduling. Free with an account.

• State Machine Stuck

  Firmware engineer fixing a vending machine before hospital supplies run out.

  state-machines. Free with an account.

• Flash Checksum Race

  Firmware engineer auditing 64-byte pages before another bricking incident.

  serial, memory. Free with an account.

• PID Gain Audit

  Firmware engineer re-tuning a bioreactor temperature controller.

  control, adc-sensors. Free with an account.

• Ring Buffer Stress

  Firmware engineer eliminating dropped bytes before a government compliance test.

  memory, interrupts-scheduling. Free with an account.

• Thermostat Firmware Gauntlet

  Firmware engineer fixing three independent HVAC bugs before certification expires.

  adc-sensors, control, state-machines. Free with an account.