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/*
* Simple PWM controller - Output setpoints
*
* Copyright (c) 2018-2020 Michael Buesch <m@bues.ch>
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "compat.h"
#include "outputsp.h"
#include "battery.h"
#include "color.h"
#include "curve.h"
#include "curve_data_adc2sp.h"
#include "debug.h"
#include "filter.h"
#include "main.h"
#include "util.h"
#define H 0
#define S 1
#define L 2
#define R 0
#define G 1
#define B 2
#define ADC_FILTER_SHIFT 8
#define SP_PERCENT(x) ((unsigned int)(((uint32_t)(x) * 100u) / UINT16_MAX))
static struct {
uint16_t hsl[NR_PWM];
uint16_t rgb[NR_PWM];
struct lp_filter filter[NR_PWM];
uint16_t debug_count;
} outsp;
/* Get an output signal (PWM) setpoint.
* hsl: Get the HSL setpoint instead of RGB, if available.
*/
uint16_t output_setpoint_get(uint8_t index, bool hsl)
{
if (index < NR_PWM) {
if (hsl)
return outsp.hsl[index];
else
return pwm_sp_get(IF_MULTIPWM(index));
}
return 0u;
}
/* Set the output signal (PWM) setpoint.
* Interrupts shall be disabled before calling this function. */
void output_setpoint_set(IF_MULTIPWM(uint8_t index,)
bool allow_hsl,
uint16_t setpoint)
{
uint8_t i;
if (NR_PWM == 3u && allow_hsl) {
/* Set all RGB PWM output signals
* that have been converted from HSL. */
for (i = 0u; i < NR_PWM; i++) {
/* Use the converted RGB setpoint. */
setpoint = outsp.rgb[i];
/* If the battery is running low, force setpoint to zero. */
if (battery_voltage_is_critical())
setpoint = 0u;
/* Set the PWM output signal. */
pwm_sp_set(IF_MULTIPWM(i,) setpoint);
}
} else {
/* If the battery is running low, force setpoint to zero. */
if (battery_voltage_is_critical())
setpoint = 0u;
/* Set the PWM output signal. */
pwm_sp_set(IF_MULTIPWM(index,) setpoint);
}
/* Tell battery management about the new setpoint. */
battery_update_setpoint();
}
/* Convert HSL values to RGB. */
void output_setpoint_convert_hsl2rgb(const uint16_t *hsl)
{
uint16_t rgb[NR_PWM];
uint8_t irq_flags;
uint8_t i;
if (NR_PWM == 3u) {
hsl2rgb(&rgb[R], &rgb[G], &rgb[B],
hsl[H], hsl[S], hsl[L]);
irq_flags = irq_disable_save();
for (i = 0u; i < NR_PWM; i++) {
outsp.hsl[i] = hsl[i];
outsp.rgb[i] = rgb[i];
}
irq_restore(irq_flags);
/* Print the converted values. */
if (DEBUG) {
if (outsp.debug_count == 0u) {
outsp.debug_count = 2048;
dprintf("H %u%% S %u%% L %u%% "
"R %u%% G %u%% B %u%%\r\n",
SP_PERCENT(outsp.hsl[H]),
SP_PERCENT(outsp.hsl[S]),
SP_PERCENT(outsp.hsl[L]),
SP_PERCENT(outsp.rgb[R]),
SP_PERCENT(outsp.rgb[G]),
SP_PERCENT(outsp.rgb[B]));
} else
outsp.debug_count--;
}
}
}
/* Convert the raw ADC value to a
* raw PWM setpoint and a filtered PWM setpoint. */
void output_setpoint_transform(IF_MULTIPWM(uint8_t index,)
bool allow_hsl,
uint16_t raw_adc,
uint16_t *raw_setpoint,
uint16_t *filt_setpoint)
{
uint16_t hsl[NR_PWM];
uint16_t raw_sp;
uint16_t filt_sp;
uint8_t i;
uint8_t irq_flags;
IF_SINGLEPWM(uint8_t index = 0u);
/* Transform the value according to the transformation curve. */
if (NR_PWM == 3u && allow_hsl) {
switch (index) {
default:
case H:
raw_sp = curve_interpolate(adc2sp_transformation_linear,
ARRAY_SIZE(adc2sp_transformation_linear),
raw_adc);
break;
case S:
raw_sp = curve_interpolate(adc2sp_transformation_linear,
ARRAY_SIZE(adc2sp_transformation_linear),
raw_adc);
break;
case L:
raw_sp = curve_interpolate(adc2sp_transformation_curve,
ARRAY_SIZE(adc2sp_transformation_curve),
raw_adc);
break;
}
} else {
raw_sp = curve_interpolate(adc2sp_transformation_curve,
ARRAY_SIZE(adc2sp_transformation_curve),
raw_adc);
}
/* Filter the setpoint value. */
filt_sp = lp_filter_run(&outsp.filter[index],
ADC_FILTER_SHIFT,
raw_sp);
/* If the battery is running low, force setpoints to zero. */
if (battery_voltage_is_critical()) {
raw_sp = 0u;
filt_sp = 0u;
}
/* Convert the HSL setpoints to RGB. */
if (NR_PWM == 3u && allow_hsl) {
irq_flags = irq_disable_save();
for (i = 0u; i < NR_PWM; i++)
hsl[i] = outsp.hsl[i];
irq_restore(irq_flags);
hsl[index] = filt_sp;
output_setpoint_convert_hsl2rgb(&hsl[0]);
}
*raw_setpoint = raw_sp;
*filt_setpoint = filt_sp;
}
void output_setpoint_wakeup(void)
{
uint8_t i;
if (USE_DEEP_SLEEP) {
for (i = 0u; i < NR_PWM; i++)
lp_filter_set(&outsp.filter[i], ADC_FILTER_SHIFT, 0u);
}
}
void output_setpoint_init(void)
{
uint8_t i;
for (i = 0u; i < NR_PWM; i++)
lp_filter_reset(&outsp.filter[i]);
}
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