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/*
* Xytronic LF-1600
* Current measurement routines
*
* Copyright (c) 2015-2017 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 "measure_current.h"
#include "measure.h"
#include "timer.h"
#include "scale.h"
#include "controller_current.h"
#include "filter.h"
#include "debug_uart.h"
#include <string.h>
/* Low pass filter time. */
#define MEASCURR_FILTER_SHIFT 4
struct meascurr_context {
bool initialized;
fixpt_t prev_feedback;
struct lp_filter_u16 filter;
int16_t old_filter_report_value;
};
static struct meascurr_context meascurr;
void meascurr_filter_reset(void)
{
lp_filter_u16_reset(&meascurr.filter);
}
uint16_t meascurr_filter_handler(uint16_t raw_adc);
uint16_t meascurr_filter_handler(uint16_t raw_adc)
{
uint16_t filtered_adc;
/* Run a simple low pass filter. */
if (meascurr.initialized) {
filtered_adc = lp_filter_u16_run(&meascurr.filter, raw_adc,
MEASCURR_FILTER_SHIFT);
} else {
lp_filter_u16_set(&meascurr.filter, raw_adc);
filtered_adc = raw_adc;
}
filtered_adc = min(filtered_adc, MEASURE_MAX_RESULT);
debug_report_int16(DEBUG_PFX1("fc"), &meascurr.old_filter_report_value,
(int16_t)filtered_adc);
return filtered_adc;
}
void meascurr_result_handler(fixpt_t measured_phys_value,
enum measure_plausibility plaus);
void meascurr_result_handler(fixpt_t measured_phys_value,
enum measure_plausibility plaus)
{
uint8_t emergency_flags;
/* Set/reset emergency status. */
emergency_flags = contrcurr_get_emerg();
if (plaus == MEAS_PLAUSIBLE)
emergency_flags &= (uint8_t)~CONTRCURR_EMERG_UNPLAUS_FEEDBACK;
else if (plaus == MEAS_PLAUS_TIMEOUT)
emergency_flags |= CONTRCURR_EMERG_UNPLAUS_FEEDBACK;
contrcurr_set_emerg(emergency_flags);
/* Set the controller feedback. */
if (plaus == MEAS_PLAUSIBLE) {
meascurr.prev_feedback = measured_phys_value;
contrcurr_set_feedback(measured_phys_value);
} else if (plaus == MEAS_NOT_PLAUSIBLE) {
/* Just run the controller with the previous feedback. */
contrcurr_set_feedback(meascurr.prev_feedback);
}
meascurr.initialized = true;
}
extern
const struct measure_config __flash meascurr_config;
const struct measure_config __flash meascurr_config = {
.name = "mc",
.mux = MEAS_MUX_ADC2,
.did = MEAS_DID_ADC2,
.ps = MEAS_PS_64,
.ref = MEAS_REF_AREF,
.averaging_timeout_ms = 5,
.scale_raw_lo = 0,
.scale_raw_hi = 65,
.scale_phys_lo = FLOAT_TO_FIXPT(AMPERE(0)),
.scale_phys_hi = FLOAT_TO_FIXPT(AMPERE(1.1)),
.plaus_neglim = FLOAT_TO_FIXPT(CONTRCURR_NEGLIM),
.plaus_poslim = FLOAT_TO_FIXPT(CONTRCURR_POSLIM),
.plaus_timeout_ms = 3000,
};
void meascurr_init(void)
{
meascurr.initialized = false;
}
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