/*
 * vim: set filetype=c tw=72:
 */

#ifndef _SETPOINTS_H
#define _SETPOINTS_H
/*!
 * Personal Cloud power controller firmware
 * (C) 2016 Stuart Longland
 *
 * 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 St, Fifth Floor, Boston, MA  02110-1301  USA.
 */

/*!
 * How long between ADC readings?  Milliseconds.
 */
#define T_ADC_MS 	(250)

/*
 * Temperature ranges and fan PWM settings
 */
#define TEMP_MIN	(270 << 6)	/*!< ~20°C, approx ADC reading */
#define TEMP_MAX	(350 << 6)	/*!< ~30°C, approx ADC reading */
#define FAN_PWM_MIN	(88)		/*!< Minimum PWM value */
#define FAN_PWM_MAX	(255)		/*!< Maximum PWM value */

/*! Fan kick-start timeout, seconds */
#define T_FAN_S		(15)

/*
 * ADC Voltage divider settings
 */
#define VDIV_R1		(1500ULL)	/*!< R1 = 1.5kOhm */
#define VDIV_R2		(100ULL)	/*!< R2 = 100 Ohm */
/*
 * ADC settings
 */
#define ADC_REF		(1100ULL)	/*!< AREF = 1.1mV */
#define ADC_MAX		(65535ULL)	/*!< ADLAR = 1 */

/* --- Thresholds --- */

/*!
 * High battery voltage.  If we reach this voltage and the charger
 * stops, just switch to discharge mode, consider the job done.
 */
#define V_H_MV		(14400)

/*!
 * Low battery voltage.  If the voltage dips to or below this level, we
 * should turn the charger on if it remains below this level for T_LOW_S
 * seconds.
 */
#define V_L_MV		(12750)

/*!
 * Critical Low battery voltage.  If the voltage dips to or below this
 * level, we should turn the charger on *immediately*, ignore all timeouts.
 */
#define V_CL_MV		(12200)

/*!
 * Solar minimum voltage.  If the solar is below this threshold, we
 * consider it too low to reliably charge the system.
 */
#define V_SOL_MIN_MV	(4000)

/* --- Timeouts --- */

/*!
 * How long do we remain in the charge state?
 */
#define T_CHARGE_S	(900)

/*!
 * How long do we remain on the mains charger after reaching V_H_MV?
 */
#define T_FLOAT_S	(900)

/*!
 * How long do we remain on the solar charger after dropping below V_L_MV?
 * (If we drop below V_CL_MV, go straight to mains charger regardless of
 * timer.)
 */
#define T_LOW_S		(3600)

/*!
 * LED blink interval in milliseconds.
 */
#define T_LED_MS	(250)

#endif