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/*
* fsm-ramping.c: Ramping functions for SpaghettiMonster.
* Handles 1- to 4-channel smooth ramping on a single LED.
*
* Copyright (C) 2017 Selene ToyKeeper
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FSM_RAMPING_C
#define FSM_RAMPING_C
#ifdef USE_RAMPING
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)
if ((! actual_level)
&& level
&& (level < jump_start_level)) {
set_level(jump_start_level);
delay_4ms(JUMP_START_TIME/4);
}
#endif // ifdef USE_JUMP_START
actual_level = level;
#ifdef USE_SET_LEVEL_GRADUALLY
gradual_target = level;
#endif
#ifdef USE_INDICATOR_LED_WHILE_RAMPING
#ifdef USE_INDICATOR_LED
if (! go_to_standby)
indicator_led((level > 0) + (level > DEFAULT_LEVEL));
#endif
//if (level > MAX_1x7135) indicator_led(2);
//else if (level > 0) indicator_led(1);
//else if (! go_to_standby) indicator_led(0);
#else
#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
#ifdef OVERRIDE_SET_LEVEL
set_level_override(level);
#else
#ifdef PWM1_CNT
static uint8_t prev_level = 0;
uint8_t api_level = level;
#endif
//TCCR0A = PHASE;
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 PWM_CHANNELS >= 4
PWM4_LVL = 0;
#endif
#ifdef USE_TINT_RAMPING
TINT1_LVL = 0;
TINT2_LVL = 0;
#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
#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
#endif
#ifdef LED2_ENABLE_PIN
LED2_ENABLE_PORT |= (1 << LED2_ENABLE_PIN);
#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
#if PWM_CHANNELS >= 4
PWM4_LVL = PWM_GET(pwm4_levels, level);
#endif
#ifdef USE_DYN_PWM
uint16_t top = PWM_GET(pwm_tops, level);
#ifdef PWM1_CNT
// 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 64 cycles to update TOP
while(prev_level && (PWM1_CNT > (top - 64))) {}
#endif
// pulse frequency modulation, a.k.a. dynamic PWM
PWM1_TOP = top;
// repeat for other channels if necessary
#ifdef PMW2_TOP
#ifdef PWM2_CNT
while(prev_level && (PWM2_CNT > (top - 64))) {}
#endif
PWM2_TOP = top;
#endif
#ifdef PMW3_TOP
#ifdef PWM3_CNT
while(prev_level && (PWM3_CNT > (top - 64))) {}
#endif
PWM3_TOP = top;
#endif
#endif // ifdef USE_DYN_PWM
#ifdef PWM1_CNT
// force reset phase when turning on from zero
// (because otherwise the initial response is inconsistent)
if (! prev_level) {
PWM1_CNT = 0;
#ifdef PWM2_CNT
PWM2_CNT = 0;
#endif
#ifdef PWM3_CNT
PWM3_CNT = 0;
#endif
}
#endif
}
#ifdef USE_TINT_RAMPING
update_tint();
#endif
#ifdef PWM1_CNT
prev_level = api_level;
#endif
#endif // ifdef OVERRIDE_SET_LEVEL
#ifdef USE_DYNAMIC_UNDERCLOCKING
auto_clock_speed();
#endif
}
#ifdef USE_SET_LEVEL_GRADUALLY
inline void set_level_gradually(uint8_t lvl) {
gradual_target = lvl;
}
#ifndef OVERRIDE_GRADUAL_TICK
// call this every frame or every few frames to change brightness very smoothly
void gradual_tick() {
// go by only one ramp level at a time instead of directly to the target
uint8_t gt = gradual_target;
if (gt < actual_level) gt = actual_level - 1;
else if (gt > actual_level) gt = actual_level + 1;
#ifdef LED_ENABLE_PIN_LEVEL_MIN
// only enable during part of the ramp
if ((gt >= LED_ENABLE_PIN_LEVEL_MIN)
&& (gt <= 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
gt --; // convert 1-based number to 0-based
PWM_DATATYPE target;
#if PWM_CHANNELS >= 1
target = PWM_GET(pwm1_levels, gt);
if ((gt < actual_level) // special case for FET-only turbo
&& (PWM1_LVL == 0) // (bypass adjustment period for first step)
&& (target == PWM_TOP)) PWM1_LVL = PWM_TOP;
else if (PWM1_LVL < target) PWM1_LVL ++;
else if (PWM1_LVL > target) PWM1_LVL --;
#endif
#if PWM_CHANNELS >= 2
target = PWM_GET(pwm2_levels, gt);
if (PWM2_LVL < target) PWM2_LVL ++;
else if (PWM2_LVL > target) PWM2_LVL --;
#endif
#if PWM_CHANNELS >= 3
target = PWM_GET(pwm3_levels, gt);
if (PWM3_LVL < target) PWM3_LVL ++;
else if (PWM3_LVL > target) PWM3_LVL --;
#endif
#if PWM_CHANNELS >= 4
target = PWM_GET(pwm4_levels, gt);
if (PWM4_LVL < target) PWM4_LVL ++;
else if (PWM4_LVL > target) PWM4_LVL --;
#endif
// did we go far enough to hit the next defined ramp level?
// if so, update the main ramp level tracking var
if ((PWM1_LVL == PWM_GET(pwm1_levels, gt))
#if PWM_CHANNELS >= 2
&& (PWM2_LVL == PWM_GET(pwm2_levels, gt))
#endif
#if PWM_CHANNELS >= 3
&& (PWM3_LVL == PWM_GET(pwm3_levels, gt))
#endif
#if PWM_CHANNELS >= 4
&& (PWM4_LVL == PWM_GET(pwm4_levels, gt))
#endif
)
{
actual_level = gt + 1;
}
#ifdef USE_TINT_RAMPING
update_tint();
#endif
#ifdef USE_DYNAMIC_UNDERCLOCKING
auto_clock_speed();
#endif
}
#endif // ifdef OVERRIDE_GRADUAL_TICK
#endif // ifdef USE_SET_LEVEL_GRADUALLY
#ifdef USE_TINT_RAMPING
void update_tint() {
#ifndef TINT_RAMPING_CORRECTION
#define TINT_RAMPING_CORRECTION 26 // 140% brightness at middle tint
#endif
// calculate actual PWM levels based on a single-channel ramp
// and a global tint value
//PWM_DATATYPE brightness = PWM_GET(pwm1_levels, level);
PWM_DATATYPE brightness = PWM1_LVL;
PWM_DATATYPE warm_PWM, cool_PWM;
// auto-tint modes
uint8_t mytint;
uint8_t level = actual_level - 1;
#if 1
// perceptual by ramp level
if (tint == 0) { mytint = 255 * (uint16_t)level / RAMP_SIZE; }
else if (tint == 255) { mytint = 255 - (255 * (uint16_t)level / RAMP_SIZE); }
#else
// linear with power level
//if (tint == 0) { mytint = brightness; }
//else if (tint == 255) { mytint = 255 - brightness; }
#endif
// stretch 1-254 to fit 0-255 range (hits every value except 98 and 198)
else { mytint = (tint * 100 / 99) - 1; }
// middle tints sag, so correct for that effect
PWM_DATATYPE2 base_PWM = brightness;
// correction is only necessary when PWM is fast
#if defined(TINT_RAMPING_CORRECTION) && (TINT_RAMPING_CORRECTION > 0)
if (level > HALFSPEED_LEVEL) {
base_PWM = brightness
+ ((((PWM_DATATYPE2)brightness) * TINT_RAMPING_CORRECTION / 64) * triangle_wave(mytint) / 255);
}
#endif
cool_PWM = (((PWM_DATATYPE2)mytint * (PWM_DATATYPE2)base_PWM) + 127) / 255;
warm_PWM = base_PWM - cool_PWM;
TINT1_LVL = warm_PWM;
TINT2_LVL = cool_PWM;
// disable the power channel, if relevant
#ifdef LED_ENABLE_PIN
if (! warm_PWM)
LED_ENABLE_PORT &= ~(1 << LED_ENABLE_PIN);
#endif
#ifdef LED2_ENABLE_PIN
if (! cool_PWM)
LED2_ENABLE_PORT &= ~(1 << LED2_ENABLE_PIN);
#endif
}
#endif // ifdef USE_TINT_RAMPING
#endif // ifdef USE_RAMPING
#endif
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