Individual skill
timers-pwm-baremetal
Use when configuring general-purpose timers for PWM, input capture, periodic ticks, timer prescaler, PWM duty cycle, or SysTick without an RTOS. Not for the timer pin mux: use gpio-baremetal.
.devin/skills/timers-pwm-baremetal/SKILL.md
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SKILL.mdcore · 5,694 bytesagents/openai.yamlasset · 261 bytes
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# Timers and PWM on bare metal
## Contract
| Field | Bound contract |
|---|---|
| Trigger | A PWM output, a pulse-width measurement, a millisecond tick, or a hardware trigger for ADC sampling is needed without an RTOS. |
| Authority | Read-only: emits timer register sequences, frequency arithmetic, and diagnostics to chat; the user places them in the firmware. Rollback is not needed because no file is written. No remote mutation. |
| Side effect | Chat output only. |
| Done | The timer input clock is derived from the clock tree including the APB doubling rule, prescaler and period values are computed from it, the channel mode and output enable are set, and a measured frequency or duty on the pin matches the arithmetic. |
## Inputs
- Target part and the timer instance (which bus it sits on, its counter width, which channels exist).