Глупый метеокороб на E-Ink

pro.menu.cpu.1MHzIntatmega328.upload.maximum_size=32256
pro.menu.cpu.1MHzIntatmega328.upload.maximum_data_size=2048
pro.menu.cpu.1MHzIntatmega328.upload.speed=9600

pro.menu.cpu.1MHzIntatmega328.bootloader.low_fuses=0x62
pro.menu.cpu.1MHzIntatmega328.bootloader.high_fuses=0xD6
pro.menu.cpu.1MHzIntatmega328.bootloader.extended_fuses=0x07
pro.menu.cpu.1MHzIntatmega328.bootloader.file=atmega/a328p_1MHz_62_d6_5.hex

#include <avr/sleep.h>
#include <avr/power.h>

#define TIME_X_POS 0
#define TIME_Y_POS 12

#define DATE_X_POS 2
#define DATE_Y_POS 9

#define WEECK_X_POS 65
#define WEECK_Y_POS 9

// ====================================== //
#define TEMP_X_POS 105
#define TEMP_Y_POS 15

#define PRESURE_X_POS 105
#define PRESURE_Y_POS 12

#define HUMIDITY_X_POS 105
#define HUMIDITY_Y_POS 9
// ====================================== //

#define BATT_X_POS 65
#define BATT_Y_POS 15

#define ONE_PASCAL 133.322

// ==== for presure history in graph ==== //
#define MAX_MESURES 171
#define BAR_GRAPH_X_POS 0
#define BAR_GRAPH_Y_POS 0
#define PRESURE_PRECISION_RANGE 4.0 // -/+ 4 mm
#define PRESURE_GRAPH_MIN 30 // vertical line graph for every N minutes
#define PRESURE_PRECISION_VAL 10 // max val 100
#define PRESURE_CONST_VALUE 700.0 // const val what unneed in graph calculations
#define PRESURE_ERROR -1000 // calibrated value
// ====================================== //

#define VCC_CALIBRATED_VAL 0.027085714285714 // == 3.792 V / 140 (real / mesured)
//#define VCC_CALIBRATED_VAL 0.024975369458128 // == 5.070 V / 203 (real / mesured)
#define VCC_MIN_VALUE 2.95 // min value to refresh screen
#define CALIBRATE_VCC 1 // need for battery mesure calibration

// 37 ~296 sec or 5 min * MAX_MESURES = 14,33(3) hours for full screen
#define SLEEP_SIZE 37

#ifdef BME280_ADDRESS
#undef BME280_ADDRESS
#define BME280_ADDRESS 0x76
#endif

#define ISR_PIN 3 // other mega328-based 2, 3
#define POWER_OFF_PIN 4 // also DONEPIN

#define E_CS 6 // CS ~ D6
#define E_DC 5 // D/C ~ D5
#define E_BSY 7 // BUSY ~ D7
#define E_RST 2 // RST ~ D2
#define E_BS 8 // BS ~ D8

/*
MOSI ~ D11
MISO ~ D12
CLK ~ D13
*/
EPD_SSD1606 Eink(E_CS, E_DC, E_BSY, E_RST);
Adafruit_BME280 bme;

volatile bool adcDone;
bool updateSreen = true;
bool normalWakeup = false;

float battVal =0;
uint8_t battValcV =0;

uint8_t timeToSleep = 0;

float presure =0;
float temperature =0;
float humidity =0;
float presure_mmHg =0;

unsigned long presureMin =0;
unsigned long presureMax =0;

uint8_t currentMesure = MAX_MESURES;
uint8_t presureValHistoryArr[MAX_MESURES] = {0};

initBME();

// https://www.arduino.cc/en/Reference/attachInterrupt
pinMode(ISR_PIN, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(ISR_PIN), ISRwakeupPin, RISING);

//drawDefaultGUI();
drawDefaultScreen();

// tiiiiny fix....
checkBME280();
updatePresureHistory();
}

void saveExtraPower(void)
{
power_timer1_disable();
power_timer2_disable();

// Disable digital input buffers:
DIDR0 = 0x3F; // on ADC0-ADC5 pins
DIDR1 = (1 << AIN1D) | (1 << AIN0D); // on AIN1/0
}

void initBME(void)
{
bme.begin(BME280_ADDRESS); // I2C addr

LowPower.powerDown(SLEEP_250MS, ADC_OFF, BOD_OFF); // wait for chip to wake up.
while(bme.isReadingCalibration()) { // if chip is still reading calibration, delay
LowPower.powerDown(SLEEP_120MS, ADC_OFF, BOD_OFF);
}
bme.readCoefficients();

updateEinkData();
enterSleep();
}
}

// func to exec in pin ISR
void ISRwakeupPin(void)
{
// Keep this as short as possible. Possibly avoid using function calls
normalWakeup = false;
updateSreen = true;
timeToSleep = 1;
}

ISR(ADC_vect)
{
adcDone = true;
}

void debounceFix(void)
{
normalWakeup = true;
updateSreen = false;
}

//https://github.com/jcw/jeelib/blob/master/examples/Ports/bandgap/bandgap.ino
uint8_t vccRead(void)
{
uint8_t count = 4;
set_sleep_mode(SLEEP_MODE_ADC);
ADMUX = bit(REFS0) | 14; // use VCC and internal bandgap
bitSet(ADCSRA, ADIE);
do {
adcDone = false;
while(!adcDone) sleep_mode();
} while (--count);
bitClear(ADCSRA, ADIE);
// convert ADC readings to fit in one byte, i.e. 20 mV steps:
// 1.0V = 0, 1.8V = 40, 3.3V = 115, 5.0V = 200, 6.0V = 250
return (55U * 1023U) / (ADC + 1) - 50;
}

unsigned long getHiPrecision(double number)
{
// what if presure will be more 800 or less 700? ...
number -= PRESURE_CONST_VALUE; // remove constant value
number *= PRESURE_PRECISION_VAL; // increase precision by PRESURE_PRECISION_VAL
return (unsigned long)number; // Extract the integer part of the number
}

void checkVCC(void)
{
// reconstruct human readable value
battValcV = vccRead();
battVal = battValcV * VCC_CALIBRATED_VAL;

if(battVal <= VCC_MIN_VALUE) { // not enought power to drive E-Ink or work propetly
detachInterrupt(digitalPinToInterrupt(ISR_PIN));
// to prevent full discharge: just sleep
bme.setSampling(Adafruit_BME280::MODE_SLEEP);
LowPower.powerDown(SLEEP_2S, ADC_OFF, BOD_OFF);
Eink.sleep(true);
LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, BOD_OFF);
}
}

void checkBME280(void)
{
bme.takeForcedMeasurement(); // wakeup, make new mesure and sleep
temperature = bme.readTemperature();
humidity = bme.readHumidity();
presure = bme.readPressure();
}

void updatePresureHistory(void)
{
// convert Pa to mmHg; 1 mmHg == 133.322 Pa
presure_mmHg = (presure + PRESURE_ERROR)/ONE_PASCAL;

// === calc presure history in graph === //
if((++currentMesure) >= (MAX_MESURES/3)) { // each 4,75 hours
currentMesure =0;
presureMin = getHiPrecision(presure_mmHg - PRESURE_PRECISION_RANGE);
presureMax = getHiPrecision(presure_mmHg + PRESURE_PRECISION_RANGE);
}

// 36 == 4 pixels in sector * 9 sectors
presureValHistoryArr[MAX_MESURES-1] = map(getHiPrecision(presure_mmHg), presureMin, presureMax, 0, 35);

for(uint8_t i=0; i < MAX_MESURES; i++) {
presureValHistoryArr[i] = presureValHistoryArr[i+1];
}
}

void updateEinkData(void)
{
if(updateSreen) {
updateSreen = false;
Eink.sleep(false);

// bar history
Eink.fillRect(BAR_GRAPH_X_POS, BAR_GRAPH_Y_POS, MAX_MESURES, 9, COLOR_WHITE);

for(uint8_t i=1; i <= (MAX_MESURES/PRESURE_GRAPH_MIN); i++) {
Eink.drawVLine(BAR_GRAPH_X_POS+i*PRESURE_GRAPH_MIN, BAR_GRAPH_Y_POS, 35, COLOR_DARKGREY);
}

for(uint8_t i=0; i <= MAX_MESURES; i++) {
Eink.drawPixel(i, BAR_GRAPH_Y_POS+presureValHistoryArr[i], COLOR_BLACK);
}

#if CALIBRATE_VCC
Eink.setCursor(BATT_X_POS, BATT_Y_POS);
Eink.print(battVal);

Eink.setCursor(BATT_X_POS, BATT_Y_POS-3);
Eink.print(battValcV);
#endif

Eink.setCursor(TEMP_X_POS, TEMP_Y_POS);
Eink.print(temperature);

Eink.setCursor(PRESURE_X_POS, PRESURE_Y_POS);
Eink.print(presure_mmHg);

Eink.setCursor(HUMIDITY_X_POS, HUMIDITY_Y_POS);
Eink.print(humidity);

updateEinkSreen();
Eink.sleep(true);
}
}

void updateEinkSreen(void)
{
Eink.display(); // update Eink RAM to screen
LowPower.idle(SLEEP_15MS, ADC_OFF, TIMER2_OFF, TIMER1_OFF, TIMER0_OFF, SPI_OFF, USART0_OFF, TWI_OFF);

Eink.closeChargePump();
// as Eink display acts not like in DS, then just sleep for 2 seconds
LowPower.powerDown(SLEEP_2S, ADC_OFF, BOD_OFF);
}

void effectiveIdle(void)
{
LowPower.idle(SLEEP_30MS, ADC_OFF, TIMER2_OFF, TIMER1_OFF, TIMER0_OFF, SPI_OFF, USART0_OFF, TWI_OFF);
}

void drawDefaultScreen(void)
{
Eink.fillScreen(COLOR_WHITE);

Eink.printAt(TEMP_X_POS, TEMP_Y_POS, F("00.00 C"));
Eink.printAt(PRESURE_X_POS, PRESURE_Y_POS, F("000.00 mm"));
Eink.printAt(HUMIDITY_X_POS, HUMIDITY_Y_POS, F("00.00 %"));

#if CALIBRATE_VCC
Eink.printAt(BATT_X_POS, BATT_Y_POS, F("0.00V"));
// just show speed in some kart racing game in mushr... kingdom (^_^ )/
Eink.printAt(BATT_X_POS, BATT_Y_POS-3, F("000cc"));
#endif
}

void drawDefaultGUI(void)
{
Eink.drawHLine(0, 60, 171, COLOR_BLACK); // split 2 areas

// draw window
Eink.drawRect(0, 0, 171, 71, COLOR_BLACK);

// frame for text
Eink.drawRect(BATT_X_POS, BATT_Y_POS, 102, 32, COLOR_BLACK);
}

void snooze(void)
{
do {
LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
} while(--timeToSleep);
}

void disablePower(void)
{
digitalWrite(POWER_OFF_PIN, HIGH);
delay(1);
digitalWrite(POWER_OFF_PIN, LOW);
LowPower.powerDown(SLEEP_FOREVER, ADC_OFF, BOD_OFF);
}