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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) {
actual_level = level;
#ifdef USE_SET_LEVEL_GRADUALLY
gradual_target = 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
} else {
level --;
#if PWM_CHANNELS >= 1
PWM1_LVL = pgm_read_byte(pwm1_levels + level);
#endif
#if PWM_CHANNELS >= 2
PWM2_LVL = pgm_read_byte(pwm2_levels + level);
#endif
#if PWM_CHANNELS >= 3
PWM3_LVL = pgm_read_byte(pwm3_levels + level);
#endif
#if PWM_CHANNELS >= 4
PWM4_LVL = pgm_read_byte(pwm4_levels + level);
#endif
}
}
#ifdef USE_SET_LEVEL_GRADUALLY
inline void set_level_gradually(uint8_t lvl) {
gradual_target = lvl;
}
// FIXME: This sucks
// FIXME: I think this can behave badly in some circumstances:
// - large smooth adjustment in progress
// - from something like (255,10) to (200, 0)
// - ... and a new target gets set while actual_level is ... not quite right
// - ... and it then ends up massively overshooting or even turning off
// (still haven't figured out the exact circumstances to cause it)
// (at the very least, actual_level can suddenly jump when multiple PWM levels are being adjusted)
// (so it's bad to rely on actual_level in the middle of a smooth adjustment)
void gradual_tick() {
int8_t changed = 0;
uint8_t target;
uint8_t gt = gradual_target - 1;
// FIXME: rewrite this completely, probably
// (perhaps go by only one ramp level at a time instead of directly to the target?)
#if PWM_CHANNELS >= 1
target = pgm_read_byte(pwm1_levels + gt);
if (PWM1_LVL < target) { PWM1_LVL ++; changed = 1; }
else if (PWM1_LVL > target) { PWM1_LVL --; changed = -1; }
#endif
#if PWM_CHANNELS >= 2
target = pgm_read_byte(pwm2_levels + gt);
if (PWM2_LVL < target) { PWM2_LVL ++; changed = 1; }
else if (PWM2_LVL > target) { PWM2_LVL --; changed = -1; }
#endif
#if PWM_CHANNELS >= 3
target = pgm_read_byte(pwm3_levels + gt);
if (PWM3_LVL < target) { PWM3_LVL ++; changed = 1; }
else if (PWM3_LVL > target) { PWM3_LVL --; changed = -1; }
#endif
#if PWM_CHANNELS >= 4
target = pgm_read_byte(pwm4_levels + gt);
if (PWM4_LVL < target) { PWM4_LVL ++; changed = 1; }
else if (PWM4_LVL > target) { PWM4_LVL --; changed = -1; }
#endif
// figure out what actual level is
/*
if (changed < 0) {
#if PWM_CHANNELS >= 4
if (PWM4_LVL < pgm_read_byte(pwm4_levels + actual_level - 1))
actual_level --;
else
#endif
#if PWM_CHANNELS >= 3
if (PWM3_LVL < pgm_read_byte(pwm3_levels + actual_level - 1))
actual_level --;
else
#endif
#if PWM_CHANNELS >= 2
if (PWM2_LVL < pgm_read_byte(pwm2_levels + actual_level - 1))
actual_level --;
else
#endif
if (PWM1_LVL < pgm_read_byte(pwm1_levels + actual_level - 1))
actual_level --;
}
else if (changed > 0) {
#if PWM_CHANNELS >= 4
if (PWM4_LVL > pgm_read_byte(pwm4_levels + actual_level - 1))
actual_level ++;
else
#endif
#if PWM_CHANNELS >= 3
if (PWM3_LVL > pgm_read_byte(pwm3_levels + actual_level - 1))
actual_level ++;
else
#endif
#if PWM_CHANNELS >= 2
if (PWM2_LVL > pgm_read_byte(pwm2_levels + actual_level - 1))
actual_level ++;
else
#endif
if (PWM1_LVL > pgm_read_byte(pwm1_levels + actual_level - 1))
actual_level ++;
}
else {
actual_level = gradual_target;
}
*/
/*
if (changed) {
#if PWM_CHANNELS >= 4
if (PWM4_LVL != pgm_read_byte(pwm4_levels + actual_level - 1))
actual_level += changed;
else
#endif
#if PWM_CHANNELS >= 3
if (PWM3_LVL != pgm_read_byte(pwm3_levels + actual_level - 1))
actual_level += changed;
else
#endif
#if PWM_CHANNELS >= 2
if (PWM2_LVL != pgm_read_byte(pwm2_levels + actual_level - 1))
actual_level += changed;
else
#endif
if (PWM1_LVL != pgm_read_byte(pwm1_levels + actual_level - 1))
actual_level += changed;
} else {
actual_level = gradual_target;
}
*/
//if (! changed) { actual_level = gradual_target; }
if (changed) {
#if PWM_CHANNELS >= 4
if (PWM4_LVL > 0) {
for (actual_level = 0;
(actual_level < MAX_LEVEL) &&
(PWM4_LVL <= pgm_read_byte(pwm4_levels + actual_level - 1));
actual_level ++) {}
} else
#endif
#if PWM_CHANNELS >= 3
if (PWM3_LVL > 0) {
for (actual_level = 0;
(actual_level < MAX_LEVEL) &&
(PWM3_LVL <= pgm_read_byte(pwm3_levels + actual_level - 1));
actual_level ++) {}
} else
#endif
#if PWM_CHANNELS >= 2
if (PWM2_LVL > 0) {
for (actual_level = 0;
(actual_level < MAX_LEVEL) &&
(PWM2_LVL <= pgm_read_byte(pwm2_levels + actual_level - 1));
actual_level ++) {}
} else
#endif
for (actual_level = 0;
(actual_level < MAX_LEVEL) &&
(PWM1_LVL <= pgm_read_byte(pwm1_levels + actual_level - 1));
actual_level ++) {}
} else {
actual_level = gradual_target;
}
}
#endif
// TODO: set_lvl_smooth?
#endif // ifdef USE_RAMPING
#endif
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