RobTillaart · RobTillaart · Oct 12, 2025 · Oct 12, 2025
diff --git a/.github/workflows/arduino-lint.yml b/.github/workflows/arduino-lint.yml
@@ -6,8 +6,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
-      - uses: arduino/arduino-lint-action@v1
+      - uses: actions/checkout@v5
+      - uses: arduino/arduino-lint-action@v2
         with:
           library-manager: update
           compliance: strict
diff --git a/.github/workflows/arduino_test_runner.yml b/.github/workflows/arduino_test_runner.yml
@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 20
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.6

diff --git a/.github/workflows/jsoncheck.yml b/.github/workflows/jsoncheck.yml
@@ -5,13 +5,15 @@ on:
     paths:
       - '**.json'
   pull_request:
+    paths:
+      - '**.json'
 
 jobs:
   test:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: json-syntax-check
         uses: limitusus/json-syntax-check@v2
         with:

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.4.2] - 2025-10-12
+- update GitHub actions
+- update examples
+- minor edits
+
 ## [0.4.1] - 2024-10-31
 - fix #17, add more optimizations, kudos to nt314p
 

diff --git a/FastShiftOut.cpp b/FastShiftOut.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: FastShiftOut.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.4.1
+// VERSION: 0.4.2
 // PURPOSE: ShiftOut that implements the Print interface
 //    DATE: 2013-08-22
 //     URL: https://github.com/RobTillaart/FastShiftOut

diff --git a/FastShiftOut.h b/FastShiftOut.h
@@ -2,7 +2,7 @@
 //
 //    FILE: FastShiftOut.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.4.1
+// VERSION: 0.4.2
 // PURPOSE: shiftOut class that implements the Print interface
 //    DATE: 2013-08-22
 //     URL: https://github.com/RobTillaart/FastShiftOut
@@ -11,7 +11,7 @@
 #include "Arduino.h"
 #include "Print.h"
 
-#define FASTSHIFTOUT_LIB_VERSION        (F("0.4.1"))
+#define FASTSHIFTOUT_LIB_VERSION        (F("0.4.2"))
 
 //  uncomment next line to get SPEED OPTIMIZED CODE
 //  #define FASTSHIFTOUT_AVR_LOOP_UNROLLED    1

diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2013-2024 Rob Tillaart
+Copyright (c) 2013-2025 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

diff --git a/examples/FastShiftOut_demo/FastShiftOut_demo.ino b/examples/FastShiftOut_demo/FastShiftOut_demo.ino
@@ -13,10 +13,11 @@ FastShiftOut FSO(12, 13, LSBFIRST);
 void setup()
 {
   Serial.begin(115200);
-  Serial.print(__FILE__);
-
+  Serial.println();
+  Serial.println(__FILE__);
   Serial.print("FASTSHIFTOUT_LIB_VERSION: ");
   Serial.println(FASTSHIFTOUT_LIB_VERSION);
+  Serial.println();
 
   Serial.println("\nPerformance - time in us");
   uint32_t start = micros();
@@ -36,9 +37,9 @@ void setup()
   }
   uint32_t duration2 = micros() - start;
   Serial.print("FastShiftOut2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
   start = micros();
@@ -48,7 +49,7 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftOut1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -58,9 +59,9 @@ void setup()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftOut2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("             Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
   Serial.println("\nTest print interface");
@@ -71,7 +72,7 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("println(\"Hello world\"): \t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
 
 
   start = micros();
@@ -81,17 +82,17 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("println(1357): \t\t\t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
 
 
   start = micros();
   for (int i = 0; i < 100; i++)
   {
-    FSO.println(3.14159265, 4);
+    FSO.println(3.14159265f, 4);
   }
   duration1 = micros() - start;
   Serial.print("println(3.14159265, 4): \t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
 
   Serial.println("\ndone ...");
 }
@@ -102,4 +103,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/FastShiftOut_scope_test/FastShiftOut_scope_test.ino b/examples/FastShiftOut_scope_test/FastShiftOut_scope_test.ino
@@ -3,6 +3,8 @@
 //  AUTHOR: Rob Tillaart
 // PURPOSE: test sketch for scope
 //     URL: https://github.com/RobTillaart/FastShiftOut
+//
+//  Connect scope to pins mentioned in constructor (12, 13)
 
 #include "FastShiftOut.h"
 
@@ -14,6 +16,7 @@ uint32_t start, duration1, duration2;
 void setup()
 {
   Serial.begin(115200);
+  Serial.println();
   Serial.println(__FILE__);
   Serial.print("FASTSHIFTOUT_LIB_VERSION: ");
   Serial.println(FASTSHIFTOUT_LIB_VERSION);

diff --git a/examples/FastShiftOut_test/FastShiftOut_test.ino b/examples/FastShiftOut_test/FastShiftOut_test.ino
@@ -14,10 +14,11 @@ uint32_t start, duration1, duration2;
 void setup()
 {
   Serial.begin(115200);
+  Serial.println();
   Serial.println(__FILE__);
-
   Serial.print("FASTSHIFTOUT_LIB_VERSION: ");
   Serial.println(FASTSHIFTOUT_LIB_VERSION);
+  Serial.println();
 
   Serial.println("\nPerformance - time in us");
   test1();
@@ -42,7 +43,7 @@ void test1()
   }
   duration1 = micros() - start;
   Serial.print("        write: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -53,9 +54,9 @@ void test1()
   }
   duration2 = micros() - start;
   Serial.print("        write: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -70,7 +71,7 @@ void test2()
   }
   duration1 = micros() - start;
   Serial.print("writeLSBFIRST: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -81,9 +82,9 @@ void test2()
   }
   duration2 = micros() - start;
   Serial.print("writeLSBFIRST: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -98,7 +99,7 @@ void test3()
   }
   duration1 = micros() - start;
   Serial.print("writeMSBFIRST: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -109,9 +110,9 @@ void test3()
   }
   duration2 = micros() - start;
   Serial.print("writeMSBFIRST: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -126,7 +127,7 @@ void test4()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftOut1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -137,9 +138,9 @@ void test4()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftOut2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("             Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -154,7 +155,7 @@ void test5()
   }
   duration1 = micros() - start;
   Serial.print("      write16: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -165,9 +166,9 @@ void test5()
   }
   duration2 = micros() - start;
   Serial.print("      write16: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -182,7 +183,7 @@ void test6()
   }
   duration1 = micros() - start;
   Serial.print("      write24: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -193,9 +194,9 @@ void test6()
   }
   duration2 = micros() - start;
   Serial.print("      write24: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -210,7 +211,7 @@ void test7()
   }
   duration1 = micros() - start;
   Serial.print("      write32: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -221,9 +222,9 @@ void test7()
   }
   duration2 = micros() - start;
   Serial.print("      write32: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("        Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -239,7 +240,7 @@ void test8()
   }
   duration1 = micros() - start;
   Serial.print("println(\"Hello world\"): \t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
   delay(100);
 
   start = micros();
@@ -249,17 +250,17 @@ void test8()
   }
   duration1 = micros() - start;
   Serial.print("println(1357): \t\t\t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
   delay(100);
 
   start = micros();
   for (int i = 0; i < 100; i++)
   {
-    FSO.println(3.14159265, 4);
+    FSO.println(3.14159265f, 4);
   }
   duration1 = micros() - start;
   Serial.print("println(3.14159265, 4): \t");
-  Serial.println(duration1 * 0.01);
+  Serial.println(duration1 * 0.01f);
   Serial.println();
   delay(100);
 }
@@ -270,4 +271,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/library.json b/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/FastShiftOut.git"
   },
-  "version": "0.4.1",
+  "version": "0.4.2",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",

diff --git a/library.properties b/library.properties
@@ -1,5 +1,5 @@
 name=FastShiftOut
-version=0.4.1
+version=0.4.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for (AVR) optimized shiftOut - e.g. 74HC595