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47 lines
1.0 KiB
47 lines
1.0 KiB
7 years ago
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# Digital Input
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- Direct digital input on selected pins of a port
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- Pin change events
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Pins are described using the packed format (see [UNIT_DO.md](UNIT_DO.md))
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## Commands
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### READ (0x00)
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Read all pins.
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*Response:*
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- u16 - pin states (packed)
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### ARM_SINGLE (0x01)
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Arm a pin or pins for a change detection.
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The active edge is defined in the unit settings.
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The pins are dis-armed again after a detected event.
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*Request:*
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- u16 - pins to arm (packed)
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### ARM_AUTO (0x02)
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Arm a pin or pins for a change detection with automatic re-arm.
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The active edge is defined in the unit settings.
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*Request:*
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- u16 - pins to arm (packed)
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### DISARM (0x03)
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Disable change detection on the selected pins.
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*Request:*
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- u16 - pins to dis-arm (packed)
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## Events
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### PIN_CHANGE (0x00)
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External interrupt, pin change(s) detected.
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Reports which pins caused the event (can be multiple), and the entire unit's input captured right after the event.
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*Payload:*
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- u16 - pins that caused the event (packed)
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- u16 - port snapshot at the time of the event (packed)
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