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// fsm-ramping.c: Ramping functions for SpaghettiMonster.
// Copyright (C) 2017-2023 Selene ToyKeeper
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#ifdef USE_RAMPING
#ifdef HAS_AUX_LEDS
inline void set_level_aux_leds(uint8_t level) {
#ifdef USE_INDICATOR_LED_WHILE_RAMPING
// use side-facing aux LEDs while main LEDs are on
if (! go_to_standby) {
#ifdef USE_INDICATOR_LED
indicator_led((level > 0) + (level > DEFAULT_LEVEL));
#endif
#ifdef USE_BUTTON_LED
button_led_set((level > 0) + (level > DEFAULT_LEVEL));
#endif
}
#else // turn off front-facing aux LEDs while main LEDs are on
#if defined(USE_INDICATOR_LED) || defined(USE_AUX_RGB_LEDS)
if (! go_to_standby) {
#ifdef USE_INDICATOR_LED
indicator_led(0);
#endif
#ifdef USE_AUX_RGB_LEDS
rgb_led_set(0);
#ifdef USE_BUTTON_LED
button_led_set((level > 0) + (level > DEFAULT_LEVEL));
#endif
#endif
}
#endif
#endif
}
#endif // ifdef HAS_AUX_LEDS
void set_level(uint8_t level) {
#ifdef USE_JUMP_START
// maybe "jump start" the engine, if it's prone to slow starts
// (pulse the output high for a moment to wake up the power regulator)
// (only do this when starting from off and going to a low level)
// TODO: allow different jump start behavior per channel mode
// FIXME: don't jump-start during factory reset
// (it seems to cause some eeprom issues on KR4
// when doing a click with a loose tailcap)
if ((! actual_level)
&& level
&& (level < JUMP_START_LEVEL)) {
set_level(JUMP_START_LEVEL);
delay_4ms(JUMP_START_TIME/4);
}
#endif
#ifdef HAS_AUX_LEDS
set_level_aux_leds(level);
#endif
// call the relevant hardware-specific set_level_*()
SetLevelFuncPtr set_level_func = channels[CH_MODE].set_level;
set_level_func(level);
if (actual_level != level) prev_level = actual_level;
actual_level = level;
#ifdef USE_SET_LEVEL_GRADUALLY
gradual_target = level;
#endif
#ifdef USE_DYNAMIC_UNDERCLOCKING
auto_clock_speed();
#endif
}
#ifdef USE_LEGACY_SET_LEVEL
// (this is mostly just here for reference, temporarily)
// single set of LEDs with 1 to 3 stacked power channels,
// like linear, FET+1, and FET+N+1
// (default set_level_*() function for most lights)
void set_level_legacy(uint8_t level) {
if (level == 0) {
#if PWM_CHANNELS >= 1
PWM1_LVL = 0;
#endif
#if PWM_CHANNELS >= 2
PWM2_LVL = 0;
#endif
#if PWM_CHANNELS >= 3
PWM3_LVL = 0;
#endif
#if defined(PWM1_CNT) && defined(PWM1_PHASE_RESET_OFF)
PWM1_CNT = 0;
#endif
#if defined(PWM2_CNT) && defined(PWM2_PHASE_RESET_OFF)
PWM2_CNT = 0;
#endif
#if defined(PWM3_CNT) && defined(PWM3_PHASE_RESET_OFF)
PWM3_CNT = 0;
#endif
#ifdef LED_OFF_DELAY
// for drivers with a slow regulator chip (eg, boost converter),
// delay before turning off to prevent flashes
delay_4ms(LED_OFF_DELAY/4);
#endif
// disable the power channel, if relevant
#ifdef LED_ENABLE_PIN
LED_ENABLE_PORT &= ~(1 << LED_ENABLE_PIN);
#endif
#ifdef LED2_ENABLE_PIN
LED2_ENABLE_PORT &= ~(1 << LED2_ENABLE_PIN);
#endif
} else {
// enable the power channel, if relevant
#ifdef LED_ENABLE_PIN
#ifdef LED_ON_DELAY
uint8_t led_enable_port_save = LED_ENABLE_PORT;
#endif
#ifndef LED_ENABLE_PIN_LEVEL_MIN
LED_ENABLE_PORT |= (1 << LED_ENABLE_PIN);
#else
// only enable during part of the ramp
if ((level >= LED_ENABLE_PIN_LEVEL_MIN)
&& (level <= LED_ENABLE_PIN_LEVEL_MAX))
LED_ENABLE_PORT |= (1 << LED_ENABLE_PIN);
else // disable during other parts of the ramp
LED_ENABLE_PORT &= ~(1 << LED_ENABLE_PIN);
#endif
// for drivers with a slow regulator chip (eg, boost converter),
// delay before lighting up to prevent flashes
#ifdef LED_ON_DELAY
// only delay if the pin status changed
if (LED_ENABLE_PORT != led_enable_port_save)
delay_4ms(LED_ON_DELAY/4);
#endif
#endif
#ifdef LED2_ENABLE_PIN
#ifdef LED2_ON_DELAY
uint8_t led2_enable_port_save = LED2_ENABLE_PORT;
#endif
LED2_ENABLE_PORT |= (1 << LED2_ENABLE_PIN);
// for drivers with a slow regulator chip (eg, boost converter),
// delay before lighting up to prevent flashes
#ifdef LED2_ON_DELAY
// only delay if the pin status changed
if (LED2_ENABLE_PORT != led2_enable_port_save)
delay_4ms(LED2_ON_DELAY/4);
#endif
#endif
// PWM array index = level - 1
level --;
#if PWM_CHANNELS >= 1
PWM1_LVL = PWM_GET(pwm1_levels, level);
#endif
#if PWM_CHANNELS >= 2
PWM2_LVL = PWM_GET(pwm2_levels, level);
#endif
#if PWM_CHANNELS >= 3
PWM3_LVL = PWM_GET(pwm3_levels, level);
#endif
#ifdef USE_DYN_PWM
uint16_t top = PWM_GET(pwm_tops, level);
#if defined(PWM1_CNT) && defined(PWM1_PHASE_SYNC)
// wait to ensure compare match won't be missed
// (causes visible flickering when missed, because the counter
// goes all the way to 65535 before returning)
// (see attiny1634 reference manual page 103 for a warning about
// the timing of changing the TOP value (section 12.8.4))
// (but don't wait when turning on from zero, because
// it'll reset the phase below anyway)
// to be safe, allow at least 32 cycles to update TOP
while(actual_level && (PWM1_CNT > (top - 32))) {}
#endif
// pulse frequency modulation, a.k.a. dynamic PWM
PWM1_TOP = top;
#endif // ifdef USE_DYN_PWM
#if defined(PWM1_CNT) && defined(PWM1_PHASE_RESET_ON)
// force reset phase when turning on from zero
// (because otherwise the initial response is inconsistent)
if (! actual_level) {
PWM1_CNT = 0;
#if defined(PWM2_CNT) && defined(PWM2_PHASE_RESET_ON)
PWM2_CNT = 0;
#endif
#if defined(PWM3_CNT) && defined(PWM3_PHASE_RESET_ON)
PWM3_CNT = 0;
#endif
}
#endif
}
#ifdef USE_DYNAMIC_UNDERCLOCKING
auto_clock_speed();
#endif
}
#endif
#ifdef USE_SET_LEVEL_GRADUALLY
inline void set_level_gradually(uint8_t lvl) {
gradual_target = lvl;
}
// call this every frame or every few frames to change brightness very smoothly
void gradual_tick() {
uint8_t gt = gradual_target;
if (gt < actual_level) gt = actual_level - 1;
else if (gt > actual_level) gt = actual_level + 1;
gt --;
// call the relevant hardware-specific function
GradualTickFuncPtr gradual_tick_func = channels[CH_MODE].gradual_tick;
bool done = gradual_tick_func(gt);
if (done) {
uint8_t orig = gradual_target;
set_level(gt + 1);
gradual_target = orig;
}
}
#endif // ifdef USE_SET_LEVEL_GRADUALLY
#endif // ifdef USE_RAMPING
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