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/*
* simple.c: Yet another UI for the Emisar D3AA
* Copyright (C) 2026 git@apexo.de
* SPDX-License-Identifier: GPL-3.0-or-later
*/
/*
* States:
* - Off : all lights off, standby
* - Aux : aux RGB shows color-coded battery voltage
* - On : main LED on (one of 4 different brightness levels),
* aux RGB shows color-coded battery voltage
*
* Transitions:
* - Off + Click -> Aux
* - Aux + Click -> On
* - Aux + 5s -> Off
* - On + Click -> Aux
* - On + Hold -> cycle brightness levels, store on release
*/
#include "arch/mcu.h"
#include incfile(CFG_H)
#ifdef HWDEF_H
#include incfile(HWDEF_H)
#endif
#include "fsm/spaghetti-monster.h"
#ifdef HWDEF_C
#include incfile(HWDEF_C)
#endif
#define NUM_LEVELS 4
#define CEIL SIMPLE_UI_CEIL
static const uint8_t brightness_levels[NUM_LEVELS] = {
1,
1 * CEIL / 10,
3 * CEIL / 10,
CEIL,
};
#define HOLD_TICKS_PER_LEVEL 47 // cycle time ca 0.75s (47/62 Hz)
#define AUX_TIMEOUT_TICKS 310 // ca. 5s
uint8_t off_state(Event event, uint16_t arg);
uint8_t aux_state(Event event, uint16_t arg);
uint8_t on_state(Event event, uint16_t arg);
uint8_t current_level_idx = 0;
uint8_t current_level = 0;
uint8_t thermal_limit = SIMPLE_UI_CEIL;
static const uint8_t voltage_levels[] = {
0, 0, // black
#ifdef DUAL_VOLTAGE_FLOOR
// NiMH
9*dV, 0x01, // R
10*dV, 0x05, // R+G
11*dV, 0x04, // G
12*dV, 0x14, // G+B
13*dV, 0x10, // B
14*dV, 0x11, // R + B
16*dV, 0x15, // R+G+B
20*dV, 0, // black
#endif
// li-ion
29*dV, 0x01, // R
33*dV, 0x05, // R+G
35*dV, 0x04, // G
37*dV, 0x14, // G+B
39*dV, 0x10, // B
41*dV, 0x11, // R + B
44*dV, 0x15, // R+G+B
255, 0x15, // R+G+B
};
static uint8_t voltage_color(void) {
uint8_t v = voltage;
if (v == 0) return 0;
v -= 1;
uint8_t i;
for (i = 0; v > voltage_levels[i]; i += 2) {}
return voltage_levels[i - 1];
}
void set_level_therm(uint8_t value, uint16_t thermal_headroom, uint16_t thermal_overshoot) {
if (current_level == thermal_limit && thermal_headroom > 0) {
if (thermal_headroom >= CEIL - thermal_limit) {
thermal_limit = CEIL;
} else {
thermal_limit += thermal_headroom;
}
}
if (thermal_overshoot > 0) {
if (thermal_overshoot >= current_level) {
thermal_limit = 1;
} else {
thermal_limit = current_level - thermal_overshoot;
}
}
current_level = value <= thermal_limit ? value : thermal_limit;
set_level(current_level);
}
uint8_t off_state(Event event, uint16_t arg) {
if (event == EV_enter_state) {
set_level(0);
rgb_led_set(0);
button_led_set(0);
go_to_standby = 1;
return EVENT_HANDLED;
}
if (event == EV_1click) {
set_state(aux_state, 0);
return EVENT_HANDLED;
}
return EVENT_NOT_HANDLED;
}
uint8_t aux_state(Event event, uint16_t arg) {
if (event == EV_enter_state) {
set_level(0);
rgb_led_set(voltage_color() << 1);
button_led_set(1);
return EVENT_HANDLED;
}
if (event == EV_1click) {
set_state(on_state, 0);
return EVENT_HANDLED;
}
if (event == EV_tick) {
if (arg >= AUX_TIMEOUT_TICKS) {
set_state(off_state, 0);
}
return EVENT_HANDLED;
}
return EVENT_NOT_HANDLED;
}
uint8_t on_state(Event event, uint16_t arg) {
if (event == EV_enter_state) {
set_level_therm(brightness_levels[current_level_idx], 0, 0);
rgb_led_set(voltage_color() << 1);
button_led_set(2);
return EVENT_HANDLED;
}
if (event == EV_tick) {
if ((arg & 63) == 0) {
rgb_led_set(voltage_color() << 1);
}
return EVENT_HANDLED;
}
if (event == EV_temperature_high) {
set_level_therm(brightness_levels[current_level_idx], 0, arg);
return EVENT_HANDLED;
}
if (event == EV_temperature_low) {
set_level_therm(brightness_levels[current_level_idx], arg, 0);
return EVENT_HANDLED;
}
if (event == EV_1click) {
set_state(aux_state, 0);
return EVENT_HANDLED;
}
if (event == EV_click1_hold) {
if (arg % HOLD_TICKS_PER_LEVEL == 0) {
current_level_idx = (current_level_idx + 1) % NUM_LEVELS;
set_level_therm(brightness_levels[current_level_idx], 0, 0);
}
return EVENT_HANDLED;
}
if (event == EV_click1_hold_release) {
eeprom[0] = current_level_idx;
save_eeprom();
return EVENT_HANDLED;
}
return EVENT_NOT_HANDLED;
}
void low_voltage(void) {
set_state(off_state, 0);
}
void setup(void) {
if (load_eeprom()) {
if (eeprom[0] < NUM_LEVELS)
current_level_idx = eeprom[0];
}
push_state(off_state, 0);
}
void loop(void) { }
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