implement eeprom save and load
This commit is contained in:
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6021440717
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3bece79a5f
267
lightmeter.ino
267
lightmeter.ino
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@ -14,28 +14,42 @@
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//128 x 64 px
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#define WIDTH 128
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#define HEIGHT 64
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#include <EEPROM.h>
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#include <BH1750.h> //from: https://github.com/mysensors/MySensorsArduinoExamples/tree/master/libraries/BH1750
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BH1750 lightMeter;
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#define INCIDENT_CORRECTION_FACTOR 1.17
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//with 1125 25 225 2465 120
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//wihtout 1335 32 265 2865 145
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/*1,186666667
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1,28
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1,177777778
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1,162271805
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1,208333333*/
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#define PIN_LDR 0 //A0
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#define PIN_BRIGHTMODE 1 //A1
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#define PIN_VBAT 2 //A2
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#define PIN_LED 8 //White status led A8
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#define PIN_TRIGGER PB8
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#define PIN_BTNLEFT PA15
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#define PIN_BTNCENTER PB4
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#define PIN_BTNRIGHT PB5
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#define PIN_ON PB9
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#define PIN_ON PB9 //pin for hardware latch
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#define TIME_AUTOPOWEROFF 120000
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#define TIME_METERINGMODESELECTION_CLOSE 4000
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#define LDRDELAY 50 //minimum delay between ldr readings. Transistor for lower value pulldown resistor switches in between
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#define TIME_METERINGMODESELECTION_CLOSE 60000
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#define LDRDELAY 100 //delay between ldr switches. New analog_high or low reading after that time. Transistor for lower value pulldown resistor switches in between
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#define LDRFILTERDELAY 1 //delay in ms between readings sequent readings for smoothing . LDRFILTERDELAY*64 > LDRDELAY
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#define LDRSWITCHDELAY 30 //time to wait after transistor switched
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#define INCIDENTDELAY 100 //minimum delay between incident sensor (BH1750) readings
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#define DEBOUNCETIME 20 //time to not check for inputs after key press
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#define BUTTONTIMEHOLD 750 //time for button hold
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#define voltage_warn 3.4 //voltage per cell //TODO implement warning
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#define VOLTAGE_WARN 3.4 //voltage per cell //TODO implement warning
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//float shuttertimes1[]={1,1.0/2, 1.0/4, 1.0/8, 1.0/15, 1.0/30, 1.0/60, 1.0/125, 1.0/250, 1.0/500, 1.0/1000, 1.0/2000, 1.0/4000, 1.0/8000};
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float shuttertimes1[]={64,32,16,8,4,2,1,1.0/2, 1.0/4, 1.0/8, 1.0/15, 1.0/30, 1.0/60, 1.0/125, 1.0/250, 1.0/500, 1.0/1000, 1.0/2000, 1.0/4000, 1.0/8000};
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@ -59,9 +73,13 @@ float isoThird[]={12,16,20,25,32,40,50,64,80,100,125,160,200,250,320,400,500,640
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long loopmillis=0; //only use one millis reading each loop
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long last_ldrReading=0;
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long last_ldrReadingFilter=0;
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long last_incidentReading=0;
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long millis_lastchange=0;
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long millis_lastinput=0;
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long millis_ledoff=0; //for led blink
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long millis_opened_meteringmodeselection=0; //time when meteringmodeselecten was opened (for led flashlight timing)
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#define DELAY_METERINGMODESELECTION_FLASHLIGHT 2000
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long timebuttonpressed_trigger;
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@ -90,7 +108,15 @@ struct Settings {
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uint8_t ISOSelectionMode; //1=Full, 2=Thirds
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};
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bool settingsStructEqual(Settings a, Settings b){
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if (a.minimumAperatureIndex!=b.minimumAperatureIndex || a.aperatureSelectionMode!=b.aperatureSelectionMode || a.shutterSelectionMode!=b.shutterSelectionMode || a.ISOSelectionMode!=b.ISOSelectionMode){
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return false;
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}
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return true;
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}
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Settings userSettings= {1,1, 1,2};
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Settings eeprom_userSettings; //to store current eeprom status
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@ -98,9 +124,12 @@ Settings userSettings= {1,1, 1,2};
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#define OLED_RESET 4
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Adafruit_SSD1306 display(OLED_RESET);
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uint16_t incident=0; //incident reading from bh1750
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uint16_t analog_low=0; //better for low light
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uint16_t analog_high=0; //better for bright light (higher pulldown resistor for ldr)
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uint16_t analog_reading_filtering=0;
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uint8_t analog_reading_count=0;
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float ev=0; //calculated EV from LDR readings (reflected) or from Luxmeter (incident)
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float ev_min=6,ev_max=12,ev_last=8;
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@ -113,6 +142,16 @@ float setAperature=8; //set to use aperature. 0 for auto
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float setShutter=0; //set to use shutter time, 0 for auto
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uint16_t setISO=100; //set to ISO
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float eeprom_setAperature=0; //set to use aperature. 0 for auto
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float eeprom_setShutter=0; //set to use shutter time, 0 for auto
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uint16_t eeprom_setISO=0; //set to ISO
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#define EEPROMADDRESS_APERATURE 0x801F000 //float = 32bit = 4byte
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#define EEPROMADDRESS_SHUTTER 0x801F004 //float = 32bit = 4byte
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#define EEPROMADDRESS_ISO 0x801F008 //uint16_T 16bit = 2byte
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#define EEPROMADDRESS_METERINGMODE 0x801F00A //uint8_t 1byte
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#define EEPROMADDRESS_USERSETTINGS 0x801F00B //Settings struct
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enum displaymode {
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lightmeter,
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settings,
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@ -123,12 +162,20 @@ uint8_t settings_selectedItem=0; //in settings display
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String settingStrings[]={"ISO:","F-Stops:","Timetable:","Turn Off"};
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#define SETTINGS_SELECTEDITEM_MAX 3 //inclusive. 2 means 3 items available
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boolean settings_itemActive=false; //item in settings selected to change value
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#define DISPLAY_UPDATEDELAY 200
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long last_displayupdate=0;
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#define METERINGMODE_REFLECTIVE 0
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#define METERINGMODE_INCIDENT 1
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uint8_t meteringmode=METERINGMODE_REFLECTIVE;
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uint8_t eeprom_meteringmode=0;
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bool eeprom_red=false; //false, if eeprom need to be red
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bool debug_printreadings=false;
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uint16_t debug_analog_high=0;
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uint16_t debug_analog_low=0;
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char tempstring[16]; //for dtostrf //dtostrf(modefactor,1,3,tempstring);
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@ -148,7 +195,7 @@ char tempstring[16]; //for dtostrf //dtostrf(modefactor,1,3,tempstring);
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void setup() {
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Serial.begin(9600);
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Serial.begin(115200);
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Serial.println("Started");
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Serial.println("Init Display");
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@ -172,33 +219,128 @@ void setup() {
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digitalWrite(PIN_BRIGHTMODE, LOW);
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pinMode(PIN_ON, OUTPUT);
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digitalWrite(PIN_ON, HIGH);
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pinMode(PIN_LED, OUTPUT);
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digitalWrite(PIN_LED, HIGH);//blink led on
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delay(50);
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digitalWrite(PIN_LED,LOW); //blink led off
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millis_lastchange=millis();
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Serial.println("Initialized");
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if (!digitalRead(PIN_TRIGGER)){ //hold trigger button during power on activates serial debug printing
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debug_printreadings=true;
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}
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//display.drawPixel(10, 10, WHITE);
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}
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bool saveSettingsToEEPROM(bool force){
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bool _eepromwritten=false;
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//checks and writes changes to eeprom
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if (eeprom_setAperature!=setAperature || force){ //value change or write forced
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EEPROM_writeAnything(EEPROMADDRESS_APERATURE, setAperature);
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_eepromwritten=true;
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}
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if (eeprom_setShutter!=setShutter || force){ //value change or write forced
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EEPROM_writeAnything(EEPROMADDRESS_SHUTTER, setShutter);
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_eepromwritten=true;
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}
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if (eeprom_setISO!=setISO || force){ //value change or write forced
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EEPROM_writeAnything(EEPROMADDRESS_ISO, setISO);
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_eepromwritten=true;
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}
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if (eeprom_meteringmode!=meteringmode || force){ //one of the values change or write forced
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EEPROM_writeAnything(EEPROMADDRESS_METERINGMODE, meteringmode);
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_eepromwritten=true;
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}
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if (!settingsStructEqual(eeprom_userSettings,userSettings) || force){ //one of the values change or write forced
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EEPROM_writeAnything(EEPROMADDRESS_USERSETTINGS, userSettings);
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_eepromwritten=true;
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}
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return _eepromwritten;
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}
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void loop() {
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loopmillis=millis(); //read millis for this cycle
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if (!eeprom_red){ //only executed one time
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eeprom_red=true;
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readEEPROM();
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}
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handleInputs();
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calculateFromEV();
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updateDisplay();
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checkLED();
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}
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void readEEPROM(){
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if (!digitalRead(PIN_BTNLEFT) && !digitalRead(PIN_BTNCENTER) && !digitalRead(PIN_BTNRIGHT) ){ //push all front buttons (left, center, right) to restore default settings
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digitalWrite(PIN_LED,HIGH);
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delay(1000); //1s led on confirmation
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digitalWrite(PIN_LED,LOW);
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saveSettingsToEEPROM(true); //force writing. userSettings contains the default values at this point
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delay(200);
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digitalWrite(PIN_LED,HIGH);
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delay(200); //1s led on confirmation
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digitalWrite(PIN_LED,LOW);
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delay(200);
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digitalWrite(PIN_LED,HIGH);
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delay(200); //1s led on confirmation
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digitalWrite(PIN_LED,LOW);
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delay(1000);
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}
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//read current eeprom
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EEPROM_readAnything(EEPROMADDRESS_APERATURE, eeprom_setAperature);
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EEPROM_readAnything(EEPROMADDRESS_SHUTTER, eeprom_setShutter);
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EEPROM_readAnything(EEPROMADDRESS_ISO, eeprom_setISO);
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EEPROM_readAnything(EEPROMADDRESS_METERINGMODE, eeprom_meteringmode);
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EEPROM_readAnything(EEPROMADDRESS_USERSETTINGS, eeprom_userSettings);
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Serial.println("");
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Serial.println("EEPROM eeprom settings");
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Serial.println(eeprom_setAperature);
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Serial.println(eeprom_setShutter);
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Serial.println(eeprom_setISO);
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Serial.println("EEPROM eeprom_userSettings");
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Serial.println(eeprom_userSettings.minimumAperatureIndex);
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Serial.println(eeprom_userSettings.aperatureSelectionMode);
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Serial.println(eeprom_userSettings.shutterSelectionMode);
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Serial.println(eeprom_userSettings.ISOSelectionMode);
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Serial.println("");
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if (eeprom_userSettings.minimumAperatureIndex==255){ //after flashing eeprom contains FF.., check one value
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for (int i=0;i<10;i++){ //blink a few times to show that eeprom was clean
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delay(50);
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digitalWrite(PIN_LED,HIGH);
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delay(50); //1s led on confirmation
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digitalWrite(PIN_LED,LOW);
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}
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}else{ //
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//apply
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setAperature=eeprom_setAperature;
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setShutter=eeprom_setShutter;
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setISO=eeprom_setISO;
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meteringmode=eeprom_meteringmode;
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userSettings=eeprom_userSettings;
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}
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}
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void handleInputs()
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{
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@ -290,13 +432,31 @@ void handleInputs()
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vbat=map(analogRead(PIN_VBAT), 0,3560,0,8200)/1000.0; //180k and 300k voltage divider. 8,4V -> 3,15V=3910
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//LDR
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if ( loopmillis-last_ldrReading>LDRDELAY )
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if ( loopmillis-last_ldrReadingFilter>LDRFILTERDELAY && loopmillis-last_ldrReading>LDRSWITCHDELAY) //multiple successive reading for filtering. each LDRFILTERDELAY ms and wait LDRSWITCHDELAY for first reading
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{
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analog_reading_filtering+=analogRead(PIN_LDR);
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analog_reading_count++;
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last_ldrReadingFilter=loopmillis;
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}
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if ( loopmillis-last_ldrReading>LDRDELAY ) //time over for one reading (low or high)
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{
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if (!digitalRead(PIN_BRIGHTMODE)){
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analog_low=analogRead(PIN_LDR);
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analog_low=analog_reading_filtering/analog_reading_count;
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}else{
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analog_high=analogRead(PIN_LDR);
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analog_high=analog_reading_filtering/analog_reading_count;
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if (debug_printreadings){
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Serial.print(analog_low);//for calibration output
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Serial.print(";");
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Serial.println(analog_high);
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}
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}
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/*Serial.print(analog_reading_count);
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Serial.print(" value=");
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Serial.println(analog_reading_filtering);*/
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analog_reading_count=0; //reset
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analog_reading_filtering=0; //reset
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digitalWrite(PIN_BRIGHTMODE, !digitalRead(PIN_BRIGHTMODE)); //switch modes
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last_ldrReading=loopmillis;
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}
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@ -364,7 +524,7 @@ void handleInputs()
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if (millis()-millis_lastchange>TIME_AUTOPOWEROFF){
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digitalWrite(PIN_ON, LOW);
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poweroff();
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}
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if ( button_trigger || button_left || button_center || button_right ) {
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@ -374,10 +534,25 @@ void handleInputs()
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}
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void poweroff(){
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bool _eepromwritten=saveSettingsToEEPROM(false); //save only changes to eeprom
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digitalWrite(PIN_LED,HIGH); //Blink led
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delay(100);
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digitalWrite(PIN_LED,LOW);
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if (_eepromwritten){
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delay(100);
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digitalWrite(PIN_LED,HIGH);
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delay(100);
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digitalWrite(PIN_LED,LOW);
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}
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digitalWrite(PIN_ON, LOW); //Turn off hardware latch
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}
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void handleInputs_Lightmeter()
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{
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if ( button_center ) { //open meteringmode selection
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displaymode=meteringmodeselection;
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millis_opened_meteringmodeselection=loopmillis;
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}
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if ( button_hold_center ) { //Go to Settings
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@ -440,12 +615,15 @@ void handleInputs_Lightmeter()
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if (button_trigger || button_hold_trigger) { //Trigger
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ev=getEV(); //set ev to current measurement by selected mode
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debug_analog_high=analog_high;
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debug_analog_low=analog_low;
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blinkLED(20);
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}
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}
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void handleInputs_Settings()
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{
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if ( button_hold_center ) { //Go to Lightmeter
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@ -509,7 +687,7 @@ void handleInputs_Settings()
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break;
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case 3: //Turn Off
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digitalWrite(PIN_ON, LOW); //set power latch low
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poweroff();
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break;
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}
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if ( button_center ){
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@ -551,9 +729,13 @@ float getEV(){
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float _ev=0;
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if (meteringmode == METERINGMODE_REFLECTIVE){ //### SPOT
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//ev=map(analog_low,500, 3500 ,500, 1400)/100.0; //for testing
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//first prototype
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double highev=11.7400532 + 0.000216655133*analog_high + 0.00000111372253*pow(analog_high,2) + -0.000000000163800818 *pow(analog_high,3);
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double lowev=-0.763427709 + 0.0138031137*analog_low + -0.00000576990095*pow(analog_low,2) + 0.000000000871611285*pow(analog_low,3);
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if (lowev>14){
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_ev=highev;
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}else if(lowev<12.5){
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@ -563,7 +745,7 @@ float getEV(){
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_ev=lowev*(1-mix)+highev*mix;
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}
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}else if (meteringmode == METERINGMODE_INCIDENT){ //### INCIDENT
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_ev = luxToEv(incident);
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_ev = luxToEv(incident*INCIDENT_CORRECTION_FACTOR);
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}
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return _ev;
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@ -834,6 +1016,7 @@ uint8_t findISOIndex(float pISO,uint8_t pMethod) //find index of closest iso fro
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void updateDisplay()
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{
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if (loopmillis-last_displayupdate>=DISPLAY_UPDATEDELAY){
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switch(displaymode){
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case lightmeter:
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updateDisplay_Lightmeter();
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@ -845,9 +1028,12 @@ void updateDisplay()
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updateDisplay_Meteringmodeselection();
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break;
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}
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last_displayupdate=loopmillis;
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display.display();
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}
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}
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void updateDisplay_Lightmeter() //Lightmeter display
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@ -868,6 +1054,8 @@ void updateDisplay_Lightmeter() //Lightmeter display
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display.clearDisplay();
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display.setTextColor(WHITE);
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//Aperature
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float _showAperature=roundAperature(showAperature,userSettings.aperatureSelectionMode);
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display.setTextSize(1);
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@ -926,6 +1114,7 @@ void updateDisplay_Lightmeter() //Lightmeter display
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//ISO
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display.setCursor(xpos_iso,ypos_iso); display.setTextSize(1); display.print("ISO "); display.print(setISO);
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//EV Scale
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uint8_t _startev=2; //first ev to display, 13 ev values can fit on screen
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if (ev>13){
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@ -972,7 +1161,7 @@ void updateDisplay_Lightmeter() //Lightmeter display
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_displayev=(int)(ev+1);//EV Value under arrow. Ceil
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}
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if (_displayev>=10){
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_xpos_current_evtext_move+=5; //move digits to left
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_xpos_current_evtext_move+=6; //move digits to left. positive means left
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}
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display.setCursor(xpos_arrow-_xpos_current_evtext_move,ypos_icon_arrow+icon_arrow_height+2); //current ev text position
|
||||
display.print(_displayev); //EV Value under arrow
|
||||
|
|
@ -987,15 +1176,20 @@ void updateDisplay_Lightmeter() //Lightmeter display
|
|||
}
|
||||
|
||||
|
||||
|
||||
//DEBUG Message
|
||||
display.setTextSize(1);
|
||||
display.setCursor(xpos_debug,ypos_debug);
|
||||
display.print(vbat);
|
||||
/*display.print(vbat);
|
||||
display.print("V ");
|
||||
display.print("Ev=");
|
||||
display.print(ev);
|
||||
display.print(" |");
|
||||
display.print(incident);
|
||||
display.print(incident);*/
|
||||
|
||||
display.print(debug_analog_low);
|
||||
display.print(" : ");
|
||||
display.print(debug_analog_high);
|
||||
|
||||
}
|
||||
|
||||
|
|
@ -1055,5 +1249,38 @@ void updateDisplay_Meteringmodeselection()
|
|||
display.print("SPOT"); //7x5 characters, xpos_center_icon_spot-(5*#chars /2)
|
||||
display.setCursor(xpos_center_icon_incident-20,ypos_icon_incident+icon_incident_height+6); //text position upper left
|
||||
display.print("INCIDENT");
|
||||
|
||||
if (loopmillis-millis_opened_meteringmodeselection>=DELAY_METERINGMODESELECTION_FLASHLIGHT){
|
||||
blinkLED(500); //turn led on continously
|
||||
}
|
||||
}
|
||||
|
||||
void blinkLED(long duration){
|
||||
digitalWrite(PIN_LED,HIGH);
|
||||
millis_ledoff=loopmillis+duration;
|
||||
}
|
||||
void checkLED(){
|
||||
if (loopmillis>=millis_ledoff && digitalRead(PIN_LED)){
|
||||
digitalWrite(PIN_LED,LOW);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
template <class T> int EEPROM_writeAnything(int ee, const T& value)
|
||||
{ //from http://www.stm32duino.com/viewtopic.php?t=1576
|
||||
const byte* p = (const byte*)(const void*)&value;
|
||||
unsigned int i;
|
||||
for (i = 0; i < sizeof(value); i++)
|
||||
EEPROM.write(ee++, *p++);
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
template <class T> int EEPROM_readAnything(int ee, T& value)
|
||||
{
|
||||
byte* p = (byte*)(void*)&value;
|
||||
unsigned int i;
|
||||
for (i = 0; i < sizeof(value); i++)
|
||||
*p++ = EEPROM.read(ee++);
|
||||
return i;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue