project

Ghost Hand

Public Unreviewed

by John Lauer

A small battery gadget that keeps an automatic sink faucet running while you use the sink: it learns the faucet's timeout, re-arms with the shortest blip, and stops after 10 minutes or when picked up.

irfaucetattiny1616lipousb-caiflow3d-printopen-hardware
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ghost-hand / firmware / src / leds.h
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John Lauer Rev 2: aim, status-dot lights, Adafruit 1317 battery, rev 2 cost, revisions, firmware 363a22f 1d ago
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/*
 * leds.h : WS2812B-2020-V6 chain (5 LEDs) and the light patterns
 */
#ifndef LEDS_H
#define LEDS_H

#include <stdint.h>
#include <stdbool.h>

typedef enum {
    PAT_OFF = 0,
    PAT_GAUGE,          /* session start: gauge fills to the level over 3 s */
    PAT_ARMED,          /* status dot breathing soft cyan-white */
    PAT_DONE,           /* 10 min cap: slow warm fade */
    PAT_LOW,            /* low battery: red */
    PAT_CHARGING,       /* filled to the level, next segment pulses */
    PAT_FULL,           /* all four green 5 s, then a dim pulse every 10 s */
    PAT_SHOW_CHARGE     /* static level (2 s after unplugging) */
} led_pattern_t;

void leds_init(void);
void leds_pattern(led_pattern_t p, uint8_t percent, uint32_t now_ms);
void leds_flags(bool echoing, bool blip);   /* modifiers for PAT_ARMED */
bool leds_frame(uint32_t now_ms);           /* render + write if due; false if deferred (echo busy) */
void leds_off(void);                        /* rail off, data low */
led_pattern_t leds_current(void);

#endif