Cherry-pick last commit from photoresistor branch

.gitignore

@@ -0,0 +1,6 @@
+.vscode/*
+*.swp
+*.bak
+*.old
+*.orig
+*.clang-format

.hgignore

@@ -1,6 +0,0 @@
-^\.vscode
-\.swp$
-\.bak$
-\.old$
-\.orig$
-\.clang-format

.hgtags

@@ -1,3 +0,0 @@
-ee4999ebdd2d1b54512facafdd03c8a530ea4bfa v1.0
-1167bd4b622768ed17e116a4cbac3db90031e6f8 v1.1
-109112211e454e608911949914eaa2722fbfed7d v1.2

README.md

@@ -24,3 +24,12 @@
 ### Additional Notes:
 
 My RTC module is not very accurate due to bad quartz chrystal calibration, looks like it is not exactly 32768 Hz and clock runs faster than it should be, giving about 5-8 seconds runaway per day. So i have to implement time correction in software (temperature changes during day/month/year is not very big - about 10 degrees Celsius, so we can use software compensation without thermal compensation).
+
+This project split into 2 branches:
+
+* **default** that contains generic clock without any additional elements
+* **photoresistor** that contains additional hardware - photocell bridge - and software algorithm that compensates ambient light sensed by photocell basing on LED display charachteristics.
+
+### Stable tags for branches:
+v1.5 - default
+v1.4 - photoresistor

simpleclock.ino

@@ -6,33 +6,6 @@
  * 2 buttons for adjusting time.
  */
 
-/* This software distributed under BSD 2 Clause License
- *
- * Copyright (c) Sergei Fedosoff, All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this listof conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITYOF SUCH DAMAGE.
- */
-
 /* DS1307 lib by FrankieChu for Seeed RTC module, in my case
  * Grove___RTC_DS1307-1.0.0.zip */
 #include <DS1307.h>
@@ -43,7 +16,7 @@ SevSeg Display;
 
 /* push button stuff */
 const long initial_delay = 600;   // wait a bit before spin numbers
-const long adjust_interval = 200; // delay between consecutive number increnents
+const long adjust_interval = 200; // delay between consecutive number increments
 const long bounce_delay = 20;     // contact bounce compensation
 const int hrs_btn = A0;           // put hour adjusting button on A0 lane
 const int min_btn = A1;           // put minute adjusting button on A1 lane
@@ -60,7 +33,7 @@ const long interval = 500;
 bool dot = true;
 
 /* time inaccuracy compensation flag */
-uint8_t compflag = 0;
+bool compflag = true;
 
 void setup()
 {
@@ -161,15 +134,15 @@ void loop()
 	 */
 
 	if ((clock.hour == 21) and (clock.minute == 21) and
-            (clock.second == 21) and (compflag == 0)) {
+	    (clock.second == 21) and (compflag)) {
 		clock.fillByHMS(clock.hour, clock.minute, 14);
 		clock.setTime();
-		compflag = 1;
+		compflag = false;
 	}
 
 	if ((clock.hour == 21) and (clock.minute == 21) and
-            (clock.second == 23) and (compflag == 1)) {
-		compflag = 0;
+	    (clock.second == 23) and (!compflag)) {
+		compflag = true;
 	}
 
 	// make blinking dot