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// fsm-adc.h: ADC (voltage, temperature) functions for SpaghettiMonster.
// Copyright (C) 2017-2023 Selene ToyKeeper
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#if defined(USE_LVP) || defined(USE_THERMAL_REGULATION)
// use raw value instead of lowpassed value for the next N measurements
// (2 = 1 for voltage + 1 for temperature)
volatile uint8_t adc_reset = 2;
#endif
#ifdef USE_LVP
// default 5 seconds between low-voltage warning events
#ifndef VOLTAGE_WARNING_SECONDS
#define VOLTAGE_WARNING_SECONDS 5
#endif
// low-battery threshold in volts * 10
#ifndef VOLTAGE_LOW
#define VOLTAGE_LOW 29
#endif
// battery is low but not critical
#ifndef VOLTAGE_RED
#define VOLTAGE_RED 33
#endif
// MCU sees voltage 0.X volts lower than actual, add X/2 to readings
#ifndef VOLTAGE_FUDGE_FACTOR
#ifdef USE_VOLTAGE_DIVIDER
#define VOLTAGE_FUDGE_FACTOR 0
#else
#define VOLTAGE_FUDGE_FACTOR 5
#endif
#endif
void adc_voltage_mode();
#ifdef TICK_DURING_STANDBY
volatile uint8_t adc_active_now = 0; // sleep LVP needs a different sleep mode
#endif
volatile uint8_t irq_adc = 0; // ADC interrupt happened?
uint8_t adc_sample_count = 0; // skip the first sample; it's junk
uint8_t adc_channel = 0; // 0=voltage, 1=temperature
uint16_t adc_raw[2]; // last ADC measurements (0=voltage, 1=temperature)
uint16_t adc_smooth[2]; // lowpassed ADC measurements (0=voltage, 1=temperature)
// ADC code is split into two parts:
// - ISR: runs immediately at each interrupt, does the bare minimum because time is critical here
// - deferred: the bulk of the logic runs later when time isn't so critical
uint8_t adc_deferred_enable = 0; // stop waiting and run the deferred code
void adc_deferred(); // do the actual ADC-related calculations
static inline void ADC_voltage_handler();
uint8_t voltage = 0;
#ifdef USE_VOLTAGE_CORRECTION
#ifdef USE_CFG
#define VOLT_CORR cfg.voltage_correction
#else
// same 0.05V units as fudge factor,
// but 7 is neutral, and the expected range is from 1 to 13
uint8_t voltage_correction = 7;
#define VOLT_CORR voltage_correction
#endif
#endif
#ifdef USE_LVP
void low_voltage();
#endif
#ifdef USE_BATTCHECK
void battcheck();
#ifdef BATTCHECK_VpT
#define USE_BLINK_NUM
#endif
#if defined(BATTCHECK_8bars) || defined(BATTCHECK_6bars) || defined(BATTCHECK_4bars)
#define USE_BLINK_DIGIT
#endif
#endif
#endif // ifdef USE_LVP
#ifdef USE_THERMAL_REGULATION
// try to keep temperature below 45 C
#ifndef DEFAULT_THERM_CEIL
#define DEFAULT_THERM_CEIL 45
#endif
// don't allow user to set ceiling above 70 C
#ifndef MAX_THERM_CEIL
#define MAX_THERM_CEIL 70
#endif
// Local per-MCU calibration value
#ifndef THERM_CAL_OFFSET
#define THERM_CAL_OFFSET 0
#endif
// temperature now, in C (ish)
int16_t temperature;
#ifdef USE_CFG
#define TH_CEIL cfg.therm_ceil
#define TH_CAL cfg.therm_cal_offset
#else
#define TH_CEIL therm_ceil
#define TH_CAL therm_cal_offset
uint8_t therm_ceil = DEFAULT_THERM_CEIL;
int8_t therm_cal_offset = 0;
#endif
static inline void ADC_temperature_handler();
#endif // ifdef USE_THERMAL_REGULATION
//inline void ADC_on();
#define ADC_on adc_voltage_mode
//inline void ADC_off();
#define ADC_off mcu_adc_off
//inline void ADC_start_measurement();
#define ADC_start_measurement mcu_adc_start_measurement
// needs a special sleep mode to get accurate measurements quickly
// ... full power-down ends up using more power overall, and causes
// some weird issues when the MCU doesn't stay awake enough cycles
// to complete a reading
//inline void adc_sleep_mode();
#define adc_sleep_mode mcu_adc_sleep_mode
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