// hwdef for Noctigon M44 2-channel light // Copyright (C) 2023 Selene ToyKeeper // SPDX-License-Identifier: GPL-3.0-or-later #pragma once #include "chan-rgbaux.c" void set_level_zero(); void set_level_ch1(uint8_t level); void set_level_ch2(uint8_t level); void set_level_both(uint8_t level); void set_level_blend(uint8_t level); void set_level_auto(uint8_t level); bool gradual_tick_ch1(uint8_t gt); bool gradual_tick_ch2(uint8_t gt); bool gradual_tick_both(uint8_t gt); bool gradual_tick_blend(uint8_t gt); bool gradual_tick_auto(uint8_t gt); Channel channels[] = { { // channel 1 only .set_level = set_level_ch1, .gradual_tick = gradual_tick_ch1, .has_args = 0 }, { // channel 2 only .set_level = set_level_ch2, .gradual_tick = gradual_tick_ch2, .has_args = 0 }, { // both channels, tied together (max "200%" power) .set_level = set_level_both, .gradual_tick = gradual_tick_both, .has_args = 0 }, { // both channels, manual blend (max "100%" power) .set_level = set_level_blend, .gradual_tick = gradual_tick_blend, .has_args = 1 }, { // both channels, auto blend .set_level = set_level_auto, .gradual_tick = gradual_tick_auto, .has_args = 1 }, RGB_AUX_CHANNELS }; void set_level_zero() { // disable timer overflow interrupt // (helps improve button press handling from Off state) DSM_INTCTRL &= ~DSM_OVF_bm; // turn off all LEDs ch1_dsm_lvl = 0; ch2_dsm_lvl = 0; CH1_PWM = 0; CH2_PWM = 0; PWM_CNT = 0; CH1_ENABLE_PORT &= ~(1 << CH1_ENABLE_PIN); // disable opamp CH2_ENABLE_PORT &= ~(1 << CH2_ENABLE_PIN); // disable opamp } // wrap setting the dsm vars, to get a faster response // (just setting *_dsm_lvl doesn't work well for strobes) // set new values for both channels, // handling any possible combination // and any before/after state void set_hw_levels(PWM_DATATYPE ch1, PWM_DATATYPE ch2, bool ch1_on, bool ch2_on) { bool was_on = (CH1_PWM>0) || (CH2_PWM>0) || ( CH1_ENABLE_PORT & (1 << CH1_ENABLE_PIN) ) || ( CH2_ENABLE_PORT & (1 << CH2_ENABLE_PIN) ); //bool now_on = (ch1>0) || (ch2>0) || ch1_on || ch2_on; #if 0 // not needed any more, after switching to PWM+DSM // phase-correct PWM at zero (for flicker-free moon), // fast PWM otherwise if (ch1 || ch2) TCCR1B = (0<> 7; CH2_PWM = ch2_pwm = ch2 >> 7; #if 0 // not needed any more, after switching to PWM+DSM // manual phase sync when changing level while already on if (was_on && now_on) while(PWM_CNT > (top - 32)) {} PWM_TOP = top; #endif // enable timer overflow interrupt so DSM can work DSM_INTCTRL |= DSM_OVF_bm; // reset phase when turning on //if ((! was_on) | (! now_on)) PWM_CNT = 0; if (! was_on) PWM_CNT = 0; } // delta-sigma modulation of PWM outputs // happens on each Timer overflow (every 512 cpu clock cycles) // uses 8-bit pwm w/ 7-bit dsm (0b 0PPP PPPP PDDD DDDD) ISR(DSM_vect) { // set new hardware values first, // for best timing (reduce effect of interrupt jitter) CH1_PWM = ch1_pwm; CH2_PWM = ch2_pwm; // calculate next values, now that timing matters less // accumulate error ch1_dsm += (ch1_dsm_lvl & 0x007f); // next PWM = base PWM value + carry bit ch1_pwm = (ch1_dsm_lvl >> 7) + (ch1_dsm > 0x7f); // clear carry bit ch1_dsm &= 0x7f; // repeat for other channels ch2_dsm += (ch2_dsm_lvl & 0x007f); ch2_pwm = (ch2_dsm_lvl >> 7) + (ch2_dsm > 0x7f); ch2_dsm &= 0x7f; } void set_level_ch1(uint8_t level) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, level); set_hw_levels(pwm, 0, 1, 0); } void set_level_ch2(uint8_t level) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, level); set_hw_levels(0, pwm, 0, 1); } void set_level_both(uint8_t level) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, level); set_hw_levels(pwm, pwm, 1, 1); } void blend_helper(PWM_DATATYPE *warm, PWM_DATATYPE *cool, uint8_t level) { PWM_DATATYPE brightness = PWM_GET(pwm1_levels, level); uint8_t blend; if (channel_mode == CM_AUTO) { blend = 255 * (uint16_t)level / RAMP_SIZE; if (cfg.channel_mode_args[channel_mode] & 0b01000000) blend = 255 - blend; } else { blend = cfg.channel_mode_args[channel_mode]; } calc_2ch_blend(warm, cool, brightness, DSM_TOP, blend); } void set_level_blend(uint8_t level) { PWM_DATATYPE warm, cool; uint8_t blend = cfg.channel_mode_args[channel_mode]; blend_helper(&warm, &cool, level); // don't turn off either emitter entirely while using middle blends set_hw_levels(warm, cool, blend < 255, blend > 0); } void set_level_auto(uint8_t level) { PWM_DATATYPE warm, cool; blend_helper(&warm, &cool, level); // don't turn off either emitter entirely // (it blinks pretty bright when the regulator turns on mid-ramp) set_hw_levels(warm, cool, 1, 1); } ///// "gradual tick" functions for smooth thermal regulation ///// // (and other smooth adjustments) ///// bump each channel toward a target value ///// bool gradual_adjust(PWM_DATATYPE ch1, PWM_DATATYPE ch2) { // adjust multiple times based on current brightness // (so it adjusts faster/coarser when bright, slower/finer when dim) // higher shift = slower/finer adjustments const uint8_t shift = 9; // ((255 << 7) >> 9) = 63 max uint8_t steps; steps = ch1_dsm_lvl >> shift; for (uint8_t i=0; i<=steps; i++) GRADUAL_ADJUST_SIMPLE(ch1, ch1_dsm_lvl); steps = ch2_dsm_lvl >> shift; for (uint8_t i=0; i<=steps; i++) GRADUAL_ADJUST_SIMPLE(ch2, ch2_dsm_lvl); if ((ch1 == ch1_dsm_lvl) && (ch2 == ch2_dsm_lvl )) { return true; // done } return false; // not done yet } bool gradual_tick_ch1(uint8_t gt) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, gt); return gradual_adjust(pwm, 0); } bool gradual_tick_ch2(uint8_t gt) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, gt); return gradual_adjust(0, pwm); } bool gradual_tick_both(uint8_t gt) { PWM_DATATYPE pwm = PWM_GET(pwm1_levels, gt); return gradual_adjust(pwm, pwm); } bool gradual_tick_blend(uint8_t gt) { PWM_DATATYPE warm, cool; blend_helper(&warm, &cool, gt); return gradual_adjust(warm, cool); } bool gradual_tick_auto(uint8_t gt) { PWM_DATATYPE warm, cool; blend_helper(&warm, &cool, gt); return gradual_adjust(warm, cool); }