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Adds hardware-specific implementations for the Arduino Zephyr core (ArduinoCore-zephyr), selected via ARDUINO_ARCH_ZEPHYR. Driver PWM (1/2/3/4-PWM) drives the Zephyr PWM timers directly through pwm_set_pulse_dt(): the requested frequency is stored once into a per-pin copy of the channel's pwm_dt_spec, and each update pushes only the pulse width. Pins are resolved from the `pwms`/`pwm-pin-gpios` properties of the board's `zephyr,user` devicetree node, and the timer channel is muxed to the GPIO via init_dev_apply_channel_pinctrl() (as the core's analogWrite does). Pins not mapped to a PWM channel fall back to analogWrite(). 6-PWM is reported as unsupported (no portable hardware dead-time). Inline current sensing uses analogRead()/analogReadResolution(). Low-side sensing is reported as unsupported (needs ADC/PWM sync). Verified on Arduino UNO Q (STM32U585): compiles, uploads, runs the open-loop velocity example, and generates PWM on the timer-mapped pins. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Description
Adds hardware-specific implementations for the Arduino Zephyr core (ArduinoCore-zephyr), selected via ARDUINO_ARCH_ZEPHYR.
Driver PWM (1/2/3/4-PWM) drives the Zephyr PWM timers directly through pwm_set_pulse_dt(): the requested frequency is stored once into a per-pin copy of the channel's pwm_dt_spec, and each update pushes only the pulse width. Pins are resolved from the
pwms/pwm-pin-gpiosproperties of the board'szephyr,userdevicetree node, and the timer channel is muxed to the GPIO via init_dev_apply_channel_pinctrl() (as the core's analogWrite does). Pins not mapped to a PWM channel fall back to analogWrite(). 6-PWM is reported as unsupported (no portable hardware dead-time).Verified on Arduino UNO Q (STM32U585): compiles, uploads, runs the open-loop velocity example, and generates PWM on the timer-mapped pins.
Type of change
Test Configuration/Setup: