Struct WritePin

go/engine/node/pinwrite.go:27–34

WritePin writes a digital or analog value to a linked channel. Build picks exactly one of the three pointers; the others stay nil. - Digital → gpioout (binary) - Analog (PWM) → pwm (duty cycle in [0,1]) - Analog (DAC) → dac (millivolts)

// WritePin writes a digital or analog value to a linked channel. Build
// picks exactly one of the three pointers; the others stay nil.
//
//   - Digital → gpioout (binary)
//   - Analog (PWM)  → pwm (duty cycle in [0,1])
//   - Analog (DAC)  → dac (millivolts)
//
// value is nil when the node is wired as a tool: the model supplies the value
// per call instead of the workflow author supplying an expression. The two are
// mutually exclusive — the builder rejects a node that is both tool-wired and
// targeted by control flow.
type WritePin struct {