From f465359eeb2c8b910b193698739c01fb36d54940 Mon Sep 17 00:00:00 2001
From: Ronald Schaten <ronald@schatenseite.de>
Date: Fri, 11 Feb 2022 22:45:48 +0100
Subject: [PATCH] darken LCD if configured to do so

---
 PhotoStepper/PhotoStepper.ino | 2 +-
 PhotoStepper/Scenerunner.cpp  | 7 ++++++-
 PhotoStepper/Scenerunner.h    | 3 ++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/PhotoStepper/PhotoStepper.ino b/PhotoStepper/PhotoStepper.ino
index 06eb3e6..69f329f 100644
--- a/PhotoStepper/PhotoStepper.ino
+++ b/PhotoStepper/PhotoStepper.ino
@@ -62,7 +62,7 @@ BasicStepperDriver stepper(STEPPER_STEPS, PIN_STEPPER_DIR, PIN_STEPPER_STEP);
 enum State { STATE_MENU, STATE_JOG, STATE_RUN };
 State state = STATE_MENU;
 
-Scenerunner scenerunner(&lcd, &stepper, PIN_CAMERA_FOCUS, PIN_CAMERA_SHUTTER);
+Scenerunner scenerunner(&lcd, &stepper, PIN_CAMERA_FOCUS, PIN_CAMERA_SHUTTER, PIN_LCD_BL);
 
 // ===
 // Order of menu entries looks chaotic. It makes sense on screen.
diff --git a/PhotoStepper/Scenerunner.cpp b/PhotoStepper/Scenerunner.cpp
index 2a7e1ae..6854610 100644
--- a/PhotoStepper/Scenerunner.cpp
+++ b/PhotoStepper/Scenerunner.cpp
@@ -4,11 +4,12 @@
 
 #include "Scenerunner.h"
 
-Scenerunner::Scenerunner(LiquidCrystal *lcd, BasicStepperDriver *stepper, int pin_focus, int pin_shutter) {
+Scenerunner::Scenerunner(LiquidCrystal *lcd, BasicStepperDriver *stepper, int pin_focus, int pin_shutter, int pin_backlight) {
   _lcd = lcd;
   _stepper = stepper;
   _pin_focus = pin_focus;
   _pin_shutter = pin_shutter;
+  _pin_backlight = pin_backlight;
 }
 
 void Scenerunner::start() {
@@ -51,6 +52,9 @@ void Scenerunner::_runHandler_focus() {
     _lcd->print(step);
     runStep = RUN_SHUTTER;
     runStepStart = millis();
+    if (bDarkenLcd) {
+      digitalWrite(_pin_backlight, LOW);
+    }
     digitalWrite(_pin_shutter, HIGH);
   }
 }
@@ -63,6 +67,7 @@ void Scenerunner::_runHandler_shutter() {
   if (millis() >= runStepStart + tShutter) {
     digitalWrite(_pin_focus, LOW);
     digitalWrite(_pin_shutter, LOW);
+    digitalWrite(_pin_backlight, HIGH);
     if (step >= nSteps) {
       _lcd->clear();
       _lcd->print("Return to start");
diff --git a/PhotoStepper/Scenerunner.h b/PhotoStepper/Scenerunner.h
index bfabebe..577ea95 100644
--- a/PhotoStepper/Scenerunner.h
+++ b/PhotoStepper/Scenerunner.h
@@ -19,7 +19,7 @@ class Scenerunner {
     int nSteps = 10;
     float distance = 0.5;
 
-    Scenerunner(LiquidCrystal *lcd, BasicStepperDriver *stepper, int pin_focus, int pin_shutter);
+    Scenerunner(LiquidCrystal *lcd, BasicStepperDriver *stepper, int pin_focus, int pin_shutter, int pin_backlight);
     void start();
     void nextAction();
 
@@ -28,6 +28,7 @@ class Scenerunner {
     BasicStepperDriver *_stepper;
     int _pin_focus;
     int _pin_shutter;
+    int _pin_backlight;
 
     int step;
     enum RunStep { RUN_OFF, RUN_SETTLE, RUN_FOCUS, RUN_SHUTTER, RUN_MOVE, RUN_RETURN };