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lightmeter
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add led dimming if dark on trigger press, implement ev scale min and max

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interfisch 2018-04-16 11:08:12 +02:00
parent 0d2cbe50bb
commit 288520eadc
1 changed files with 148 additions and 47 deletions
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193
lightmeter.ino
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@ -42,6 +42,7 @@ BH1750 lightMeter;
#define PIN_ON PB9 //pin for hardware latch
#define TIME_AUTOPOWEROFF 120000
#define TIME_METERINGMODESELECTION_CLOSE 60000
#define TIME_METERINGMODESELECTION_SHUTDOWN_SHORTCUT 500
#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
#define LDRFILTERDELAY 1 //delay in ms between readings sequent readings for smoothing . LDRFILTERDELAY*64 > LDRDELAY
#define LDRSWITCHDELAY 30 //time to wait after transistor switched
@ -134,10 +135,11 @@ uint16_t analog_reading_filtering=0;
uint8_t analog_reading_count=0;
float ev=0; //calculated EV from LDR readings (reflected) or from Luxmeter (incident)
float ev_min=6,ev_max=12,ev_last=8;
float ev_min=-255,ev_max=-255,ev_last=-255;
float showAperature=0;
float showShutter=0;
bool manualev_mode=false; //manual ev change by left/right
//Usersettings
float setAperature=8; //set to use aperature. 0 for auto
@ -222,9 +224,9 @@ void setup() {
pinMode(PIN_ON, OUTPUT);
digitalWrite(PIN_ON, HIGH);
pinMode(PIN_LED, OUTPUT);
digitalWrite(PIN_LED, HIGH);//blink led on
analogWrite(PIN_LED,255); //blink led on
delay(50);
digitalWrite(PIN_LED,LOW); //blink led off
analogWrite(PIN_LED,0); //LED OFF //blink led off
millis_lastchange=millis();
@ -291,18 +293,18 @@ void loop() {
void readEEPROM(){
if (!digitalRead(PIN_BTNLEFT) && !digitalRead(PIN_BTNCENTER) && !digitalRead(PIN_BTNRIGHT) ){ //push all front buttons (left, center, right) to restore default settings
digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,255);
delay(1000); //1s led on confirmation
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0); //LED OFF
saveSettingsToEEPROM(true); //force writing. userSettings contains the default values at this point
delay(200);
digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,255);
delay(200); //1s led on confirmation
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0); //LED OFF
delay(200);
digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,255);
delay(200); //1s led on confirmation
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0); //LED OFF
delay(1000);
}
@ -327,9 +329,9 @@ void readEEPROM(){
if (eeprom_userSettings.minimumAperatureIndex==255){ //after flashing eeprom contains FF.., check one value
for (int i=0;i<10;i++){ //blink a few times to show that eeprom was clean
delay(50);
digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,255);
delay(50); //1s led on confirmation
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0);
}
}else{ //
//apply
@ -562,14 +564,14 @@ void handleInputs()
void poweroff(){
bool _eepromwritten=saveSettingsToEEPROM(false); //save only changes to eeprom
digitalWrite(PIN_LED,HIGH); //Blink led
analogWrite(PIN_LED,255); //Blink led
delay(100);
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0);
if (_eepromwritten){
delay(100);
digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,255);
delay(100);
digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0);
}
digitalWrite(PIN_ON, LOW); //Turn off hardware latch
}
@ -586,24 +588,27 @@ void handleInputs_Lightmeter()
}
if (setShutter==0 && setAperature==0){ //Auto
if (manualev_mode){ //Manual Ev
//Value Change
if ( button_left ) {
ev-=1.0/3;
}
if ( button_right ) {
ev+=1.0/3;
}
//Change Mode
if ( button_hold_left ){ //Auto -> T
setShutter=showShutter;
setAperature=0;
}
if ( button_hold_right ){ //Auto -> Av
if ( button_hold_left ){ // Manual Ev -> Av
setAperature=showAperature;
setShutter=0;
manualev_mode=false;
}
if ( button_hold_right ){ // Manual Ev -> T
setShutter=showShutter;
setAperature=0;
manualev_mode=false;
}
}else if(setShutter==0){ //Aperature Priority
manualev_mode=false;
//Value Change
if ( button_left ) {
changeAperature(1); //Decrement Aperature
@ -612,15 +617,15 @@ void handleInputs_Lightmeter()
changeAperature(-1); //Increment Aperature
}
//Change Mode
if ( button_hold_left ){ //change from Aperature Priority to Auto, Av -> Auto
setAperature=0;
setShutter=0;
if ( button_hold_left ){ //Av -> Manual Ev
manualev_mode=true;
}
if ( button_hold_right ){ //Av -> T
setShutter=showShutter;
setAperature=0;
}
}else if (setAperature==0){ //Shutter Priority
manualev_mode=false;
//Value Change
if ( button_left ) {
changeShutter(1); //Decrement Aperature
@ -633,17 +638,39 @@ void handleInputs_Lightmeter()
setAperature=showAperature;
setShutter=0;
}
if ( button_hold_right ){ //T -> Auto
setAperature=0;
setShutter=0;
if ( button_hold_right ){ //T -> Manual Ev
manualev_mode=true;
}
}
if (button_trigger || button_hold_trigger) { //Trigger
if (button_trigger) { //Trigger
ev_last=ev;
ev=getEV(); //set ev to current measurement by selected mode
if (ev<ev_min || ev_min<-254){ //new ev is smaller than last or ev_min wasn set
ev_min=ev;
}else if(ev>ev_max){ //new ev is greater
ev_max=ev;
}
debug_analog_high=analog_high;
debug_analog_low=analog_low;
blinkLED(20);
//LED Brightness on trigger
uint8_t triggerblinkbrightness=255;
if (ev<4){ //dim led when dark
triggerblinkbrightness=map(ev,4,0,255,50);
}
blinkLED(20,triggerblinkbrightness);
}
if (button_hold_trigger) { //Trigger hold, resets ev_min,max and last
ev_min=-255; //placeholder for "not set"
ev_max=-255;
ev_last=-255;
//LED Brightness on trigger
uint8_t triggerblinkbrightness=255;
if (ev<4){ //dim led when dark
triggerblinkbrightness=map(ev,4,0,255,50);
}
blinkLED(400,triggerblinkbrightness);
}
}
@ -727,6 +754,9 @@ void handleInputs_Settings()
void handleInputs_Meteringmodeselection()
{
if ( button_center ) { //next or back to main screen
if (millis()-millis_lastchange<TIME_METERINGMODESELECTION_SHUTDOWN_SHORTCUT) { //double press select (center) to poweroff
poweroff(); //Turn off
}
displaymode=lightmeter;
}
@ -1147,7 +1177,11 @@ void updateDisplay_Lightmeter() //Lightmeter display
}
//Aperature border
if (setAperature>0){ //Aperature Priority Mode
display.drawRect(xpos_aperature-2, ypos_aperature-2, 40, 18, WHITE);
if (!manualev_mode){ //selection
display.drawRect(xpos_aperature-2, ypos_aperature-2, 40, 18, WHITE); //normal border
}else{ //manual ev selection
drawRectCorners(xpos_aperature-2, ypos_aperature-2, 40, 18, 5,WHITE); //alternative border
}
}
@ -1178,7 +1212,12 @@ void updateDisplay_Lightmeter() //Lightmeter display
}
//Shutter border
if (setShutter>0){ //Shutter Priority Mode
display.drawRect(xpos_shutter-2, ypos_shutter-2, 60, 18, WHITE);
if (!manualev_mode){ //selection
display.drawRect(xpos_shutter-2, ypos_shutter-2, 60, 18, WHITE); //normal border
}else{ //manual ev selection
drawRectCorners(xpos_shutter-2, ypos_shutter-2, 60, 18, 5, WHITE); //alternative border
}
}
if (meteringmode == METERINGMODE_REFLECTIVE){
@ -1193,11 +1232,11 @@ void updateDisplay_Lightmeter() //Lightmeter display
//EV Scale
int8_t _startev=-5; //first ev to display, 13 ev values can fit on screen
if (ev>2){
_startev=2;
if (ev>2 && (ev_min<-254 || ev_min>2)){ //TODO make this better
_startev=0;
}
if (ev>13){
_startev=5+ev-13;
if (ev>11 || ev_max>11){
_startev=5+ev-11;
}
#define FULLEVLINEDISTANCE 9
@ -1205,7 +1244,7 @@ void updateDisplay_Lightmeter() //Lightmeter display
#define ypos_evtext 7
#define ypos_icon_arrow 6
uint8_t xpos_arrow=(ev-_startev*1.0) *FULLEVLINEDISTANCE;
uint8_t xpos_arrow=(ev-_startev*1.0) *FULLEVLINEDISTANCE; //calculate display position for ev
display.setTextSize(1);
display.drawLine(THIRDEVLINEDISTANCE,0,THIRDEVLINEDISTANCE,0,WHITE); //first third line
@ -1219,17 +1258,21 @@ void updateDisplay_Lightmeter() //Lightmeter display
if (_fullevline%2==1){ //only every second
uint8_t _evtextmove=2; //movement of left point of text to the left. Compensation for center position
if (_current_evvalue>9){ //text has two digits
if (_current_evvalue>9 || _current_evvalue<0){ //text has two digits
_evtextmove=5;
}
if ( (xpos_arrow-7 > _xpos_center_evtext) || (xpos_arrow+7 < _xpos_center_evtext) ) { //drawn arrow not too close to ev text
display.setCursor(_xpos_center_evtext-_evtextmove,ypos_evtext); display.print(_current_evvalue); //EV Text
display.setCursor(_xpos_center_evtext-_evtextmove,ypos_evtext); display.print(_current_evvalue); //EV Text at scale line
}
}
}
//Arrow at current ev
float _ev_decimals=ev-((int)ev);
float _ev_decimals=abs(ev-((int)ev));
display.drawXBitmap(xpos_arrow - icon_arrow_width/2.0, ypos_icon_arrow, icon_arrow_bits, icon_arrow_width, icon_arrow_height, WHITE); //arrow icon
if (manualev_mode){ //in manual ev mode
display.drawXBitmap(xpos_arrow - icon_arrow_width/2.0 -1, ypos_icon_arrow, icon_arrow_bits, icon_arrow_width, icon_arrow_height, WHITE); //arrow icon //draw bold
display.drawXBitmap(xpos_arrow - icon_arrow_width/2.0 +1, ypos_icon_arrow, icon_arrow_bits, icon_arrow_width, icon_arrow_height, WHITE); //arrow icon //draw bold
}
uint8_t _xpos_current_evtext_move=5; //for text centering
if (_ev_decimals <= 0.1666 || _ev_decimals > 0.8333) { //without fraction displayed
_xpos_current_evtext_move=2;
@ -1237,12 +1280,22 @@ void updateDisplay_Lightmeter() //Lightmeter display
int _displayev=(int)ev;
if (_ev_decimals > 0.8333 ){
if (ev>=0){ //ev is positive
_displayev=(int)(ev+1);//EV Value under arrow. Ceil
}else if (ev<0){ //ev is negative
_displayev=(int)(ev-1);//EV Value under arrow. Ceil (negative)
}
if (_displayev>=10){
}
//int _xpos_current_fraction_move=0; //move fraction icon
if (_displayev>=10 || ev<-0.1666){ //displayev is two digits long (>=10 or negative sign)
_xpos_current_evtext_move+=6; //move digits to left. positive means left
}
display.setCursor(xpos_arrow-_xpos_current_evtext_move,ypos_icon_arrow+icon_arrow_height+2); //current ev text position
if (ev<0 && _displayev==0){ //ev is negative but displayev is zero
display.print("-"); // add minus in front
}
display.print(_displayev); //EV Value under arrow
@ -1254,6 +1307,29 @@ void updateDisplay_Lightmeter() //Lightmeter display
display.drawXBitmap(xpos_arrow , ypos_icon_arrow+icon_arrow_height-(icon_two_third_height-8)/2 +2, icon_two_third_bits, icon_two_third_width, icon_two_third_height, WHITE); //two third
}
//ev min & max
uint8_t xpos_ev_min=(ev_min-_startev*1.0) *FULLEVLINEDISTANCE; //calculate display position for ev
uint8_t xpos_ev_max=(ev_max-_startev*1.0) *FULLEVLINEDISTANCE; //calculate display position for ev
bool arrow_is_between_minmax=true;
if (xpos_arrow<xpos_ev_min || xpos_arrow>xpos_ev_max){
arrow_is_between_minmax=false; //selected ev is not between min and max ev
}
if (ev_min>-254){ //ev_min is set (-255 is placeholder for "not set")
display.drawLine(xpos_ev_min,2,xpos_ev_min,5,WHITE);
if ((xpos_arrow-xpos_ev_min)>3 && arrow_is_between_minmax){ //arrow is not overlaying line and is in between min and max
display.drawLine(xpos_ev_min,4,xpos_arrow - 4,4,WHITE); //line from left horizontally to arrow
display.drawLine(xpos_ev_min,5,xpos_arrow - 4,5,WHITE); //line from left horizontally to arrow
}
}
if (ev_max>-254){ //ev_min is set (-255 is placeholder for "not set")
display.drawLine(xpos_ev_max,2,xpos_ev_max,5,WHITE);
if ((xpos_ev_max-xpos_arrow)>3 && arrow_is_between_minmax){ //arrow is not overlaying line and is in between min and max
display.drawLine(xpos_ev_max,4,xpos_arrow + 3,4,WHITE); //line from right horizontally to arrow
display.drawLine(xpos_ev_max,5,xpos_arrow + 3,5,WHITE); //line from right horizontally to arrow
}
}
//DEBUG Message
@ -1266,9 +1342,13 @@ void updateDisplay_Lightmeter() //Lightmeter display
display.print(" |");
display.print(incident);*/
display.print(debug_analog_low);
/*display.print(debug_analog_low);
display.print(" : ");
display.print(debug_analog_high);
display.print(debug_analog_high);*/
display.print(ev_min,1);
display.print(":");
display.print(ev_max,1);
}
@ -1334,13 +1414,34 @@ void updateDisplay_Meteringmodeselection()
}
}
void drawRectCorners(uint8_t px,uint8_t py, uint8_t pw, uint8_t ph, uint8_t pcornerlength, uint8_t pc){
//px py are top left
display.drawLine(px,py,px+pcornerlength,py, pc);
display.drawLine(px,py,px,py+pcornerlength, pc);
display.drawLine(px+pw,py, px+pw-pcornerlength,py, pc);
display.drawLine(px+pw,py, px+pw,py+pcornerlength, pc);
display.drawLine(px+pw,py+ph, px+pw-pcornerlength,py+ph, pc);
display.drawLine(px+pw,py+ph, px+pw,py+ph-pcornerlength, pc);
display.drawLine(px,py+ph, px+pcornerlength,py+ph, pc);
display.drawLine(px,py+ph, px,py+ph-pcornerlength, pc);
}
void blinkLED(long duration){
digitalWrite(PIN_LED,HIGH);
blinkLED(duration,255);
}
void blinkLED(long duration,uint8_t brightness){
//digitalWrite(PIN_LED,HIGH);
analogWrite(PIN_LED,brightness);
millis_ledoff=loopmillis+duration;
}
void checkLED(){
if (loopmillis>=millis_ledoff && digitalRead(PIN_LED)){
digitalWrite(PIN_LED,LOW);
//digitalWrite(PIN_LED,LOW);
analogWrite(PIN_LED,0); //LED OFF
}
}