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drivers: add PWMSetter HAL #939

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drivers: add PWMSetter HAL #939

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drivers: add PWMSetter HAL
soypat Oct 28, 2026
08f6b80
rename PWM
soypat Oct 28, 2026
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19 changes: 19 additions & 0 deletions pwm.go
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Original file line number Diff line number Diff line change
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package drivers

// PWM is a typical PWM controller implementation which allows shared
// setting of frequency and individual setting of duty cycle for several PWM channels.
type PWM interface {
// Top usually represents maximum value the running PWM counter can take, either by hardware or set at configuration.
Top() uint32
// SetChannels sets the PWM counter limit for channels specified. channels are PWM peripheral based, not MCU host based.
// Users need to check first what PWMSetter and channel combination corresponds to a pin before using the PWMSetter.
// - channels corresponds to values, so len(channels) must be equal to len(values).
// - The PWMSetter can potentially synchronize PWM signal output for a single SetChannels call depending on configuration.
// Example:
//
// quarter := 25*pwm.Top()/100 // 25% duty-cycle.
// full := pwm.Top() // 100% duty cycle (always on)
// off := uint32(0) // PWM low output (always off)
// pwm.SetChannels([]uint8{c1, c2, c3}, []uint32{quarter, full, off})
SetChannels(channels []uint8, values []uint32) error
}
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