Adding all files from Project 1 to start

.gitignore

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+.pio

.vscode/c_cpp_properties.json

@@ -0,0 +1,56 @@
+//
+// !!! WARNING !!! AUTO-GENERATED FILE!
+// PLEASE DO NOT MODIFY IT AND USE "platformio.ini":
+// https://docs.platformio.org/page/projectconf/section_env_build.html#build-flags
+//
+{
+    "configurations": [
+        {
+            "name": "PlatformIO",
+            "includePath": [
+                "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/include",
+                "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/src",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/cores/arduino",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/EEPROM/src",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/HID/src",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/SPI/src",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/SoftwareSerial/src",
+                "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/Wire/src",
+                ""
+            ],
+            "browse": {
+                "limitSymbolsToIncludedHeaders": true,
+                "path": [
+                    "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/include",
+                    "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/src",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/cores/arduino",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/EEPROM/src",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/HID/src",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/SPI/src",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/SoftwareSerial/src",
+                    "C:/Users/helgi/.platformio/packages/framework-arduino-avr/libraries/Wire/src",
+                    ""
+                ]
+            },
+            "defines": [
+                "PLATFORMIO=60200",
+                "ARDUINO_AVR_NANO",
+                "F_CPU=16000000L",
+                "ARDUINO_ARCH_AVR",
+                "ARDUINO=10808",
+                "__AVR_ATmega328P__",
+                ""
+            ],
+            "cStandard": "gnu11",
+            "cppStandard": "gnu++11",
+            "compilerPath": "C:/Users/helgi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc.exe",
+            "compilerArgs": [
+                "-mmcu=atmega328p",
+                ""
+            ]
+        }
+    ],
+    "version": 4
+}

.vscode/extensions.json

@@ -0,0 +1,11 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack",
+        "pioarduino.pioarduino-ide"
+    ]
+}

.vscode/launch.json

@@ -0,0 +1,44 @@
+// AUTOMATICALLY GENERATED FILE. PLEASE DO NOT MODIFY IT MANUALLY
+//
+// PlatformIO Debugging Solution
+//
+// Documentation: https://docs.platformio.org/en/latest/plus/debugging.html
+// Configuration: https://docs.platformio.org/en/latest/projectconf/sections/env/options/debug/index.html
+
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug",
+            "executable": "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/.pio/build/nanoatmega328new/firmware.elf",
+            "projectEnvName": "nanoatmega328new",
+            "toolchainBinDir": "C:/Users/helgi/.platformio/packages/toolchain-atmelavr/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "preLaunchTask": {
+                "type": "PlatformIO",
+                "task": "Pre-Debug"
+            }
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (skip Pre-Debug)",
+            "executable": "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/.pio/build/nanoatmega328new/firmware.elf",
+            "projectEnvName": "nanoatmega328new",
+            "toolchainBinDir": "C:/Users/helgi/.platformio/packages/toolchain-atmelavr/bin",
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (without uploading)",
+            "executable": "C:/Users/helgi/H26/ESP/Projects/esp_project1_h26/.pio/build/nanoatmega328new/firmware.elf",
+            "projectEnvName": "nanoatmega328new",
+            "toolchainBinDir": "C:/Users/helgi/.platformio/packages/toolchain-atmelavr/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "loadMode": "manual"
+        }
+    ]
+}

compile_commands.json

@@ -0,0 +1,200 @@
+[
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/CDC.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/CDC.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/CDC.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/CDC.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial0.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial0.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial0.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial0.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial1.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial1.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial1.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial1.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial2.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial2.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial2.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial2.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial3.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial3.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/HardwareSerial3.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/HardwareSerial3.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/IPAddress.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/IPAddress.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/IPAddress.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/IPAddress.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/PluggableUSB.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/PluggableUSB.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/PluggableUSB.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/PluggableUSB.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/Print.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Print.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Print.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/Print.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/Stream.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Stream.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Stream.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/Stream.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/Tone.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Tone.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/Tone.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/Tone.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/USBCore.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/USBCore.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/USBCore.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/USBCore.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/WInterrupts.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WInterrupts.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WInterrupts.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/WInterrupts.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/WMath.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WMath.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WMath.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/WMath.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/WString.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WString.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/WString.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/WString.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/abi.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/abi.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/abi.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/abi.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/hooks.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/hooks.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/hooks.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/hooks.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/main.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/main.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/main.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/main.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/FrameworkArduino/new.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/new.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/new.cpp",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/new.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/wiring.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/wiring_analog.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_analog.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_analog.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring_analog.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/wiring_digital.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_digital.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_digital.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring_digital.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -mmcu=atmega328p -x assembler-with-cpp -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs -c -o .pio/build/nanoatmega328new/FrameworkArduino/wiring_pulse.S.o /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_pulse.S",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_pulse.S",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring_pulse.S.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/wiring_pulse.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_pulse.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_pulse.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring_pulse.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-gcc -o .pio/build/nanoatmega328new/FrameworkArduino/wiring_shift.c.o -c -std=gnu11 -fno-fat-lto-objects -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs /Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_shift.c",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino/wiring_shift.c",
+        "output": ".pio/build/nanoatmega328new/FrameworkArduino/wiring_shift.c.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/digital_in.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/digital_in.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/digital_in.cpp",
+        "output": ".pio/build/nanoatmega328new/src/digital_in.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/digital_out.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/digital_out.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/digital_out.cpp",
+        "output": ".pio/build/nanoatmega328new/src/digital_out.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/main.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/main.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/main.cpp",
+        "output": ".pio/build/nanoatmega328new/src/main.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/part1_first_working_main.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/part1_first_working_main.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/part1_first_working_main.cpp",
+        "output": ".pio/build/nanoatmega328new/src/part1_first_working_main.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/part1part2.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/part1part2.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/part1part2.cpp",
+        "output": ".pio/build/nanoatmega328new/src/part1part2.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/part3part1.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/part3part1.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/part3part1.cpp",
+        "output": ".pio/build/nanoatmega328new/src/part3part1.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/rotary_encoder_driver.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/rotary_encoder_driver.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/rotary_encoder_driver.cpp",
+        "output": ".pio/build/nanoatmega328new/src/rotary_encoder_driver.cpp.o"
+    },
+    {
+        "command": "/Users/dadi/.platformio/packages/toolchain-atmelavr/bin/avr-g++ -o .pio/build/nanoatmega328new/src/timer_usec.cpp.o -c -fno-exceptions -fno-threadsafe-statics -fpermissive -std=gnu++11 -mmcu=atmega328p -Os -Wall -ffunction-sections -fdata-sections -flto -DPLATFORMIO=60119 -DARDUINO_AVR_NANO -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO=10808 -Iinclude -Isrc -I/Users/dadi/.platformio/packages/framework-arduino-avr/cores/arduino -I/Users/dadi/.platformio/packages/framework-arduino-avr/variants/eightanaloginputs src/timer_usec.cpp",
+        "directory": "/Users/dadi/embedded/proj1",
+        "file": "src/timer_usec.cpp",
+        "output": ".pio/build/nanoatmega328new/src/timer_usec.cpp.o"
+    }
+]

include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

include/digital_in.h

@@ -0,0 +1,14 @@
+#ifndef DIGITAL_IN_H
+#define DIGITAL_IN_H
+#include <stdint.h>
+
+struct Digital_in {
+    uint8_t pin_mask;
+
+    Digital_in(uint8_t pin);
+    
+    void init();
+    bool is_hi();
+    bool is_lo();
+};
+#endif

include/digital_out.h

@@ -0,0 +1,15 @@
+#ifndef DIGITAL_OUT_H
+#define DIGITAL_OUT_H
+#include<stdint.h>
+
+struct Digital_out {
+    uint8_t pin_mask;
+
+    Digital_out(uint8_t pin);
+
+    void init();
+    void toggle();
+    void set_hi();
+    void set_lo();
+};
+#endif

include/rotary_encoder_driver.h

@@ -0,0 +1,31 @@
+#ifndef ROTARY_ENCODER_DRIVER_H
+#define ROTARY_ENCODER_DRIVER_H
+
+#include "digital_in.h"
+#include "digital_out.h"
+#include "timer_usec.h"
+
+class RotaryEncoderDriver {
+    volatile uint8_t cycle;
+    volatile int16_t count;
+    volatile int16_t prev_count;
+
+    Digital_out led;
+
+    Digital_in eA;
+    Digital_in eB;
+
+    Timer_usec timer;
+
+public:
+    volatile int16_t delta;
+
+    RotaryEncoderDriver();
+    void begin();
+    void update();
+    int position(); 
+    void update_delta();
+    float count_per_sec();
+
+};
+#endif

include/timer_usec.h

@@ -0,0 +1,9 @@
+#ifndef TIMER_USEC_H
+#define TIMER_USEC_H
+#include <avr/io.h>
+
+struct Timer_usec {
+    Timer_usec();
+    void init(uint16_t period_us);
+};
+#endif

lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

@@ -0,0 +1,14 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:nanoatmega328new]
+platform = atmelavr
+board = nanoatmega328new
+framework = arduino

src/digital_in.cpp

@@ -0,0 +1,14 @@
+#include <avr/io.h>
+#include "digital_in.h"
+
+Digital_in::Digital_in(uint8_t pin) : pin_mask(1<<pin) {}
+
+void Digital_in::init() {
+    DDRD  &= ~pin_mask;
+    PORTD |=  pin_mask;
+}
+
+bool Digital_in::is_hi() { return PIND & pin_mask; }
+bool Digital_in::is_lo() { return !is_hi(); }
+
+

src/digital_out.cpp

@@ -0,0 +1,9 @@
+#include "digital_out.h"
+#include <avr/io.h>
+
+Digital_out::Digital_out(uint8_t pin) : pin_mask(1<<pin) {}
+
+void Digital_out::init()   { DDRB  |=  pin_mask; }
+void Digital_out::toggle() { PORTB ^=  pin_mask; }
+void Digital_out::set_hi() { PORTB |=  pin_mask; }
+void Digital_out::set_lo() { PORTB &= ~pin_mask; }

src/main.cpp

@@ -0,0 +1,23 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <Arduino.h>
+
+#include "rotary_encoder_driver.h"
+
+RotaryEncoderDriver encoder;
+
+int main() {
+    init();
+    Serial.begin(9600);
+
+    cli();
+    encoder.begin();
+    sei();
+
+    while (true) {
+        _delay_ms(50);
+        Serial.print("Counts per second: ");
+        Serial.println(encoder.count_per_sec());
+    }
+    return 0;
+}

src/part1_first_working_main.cpp

@@ -0,0 +1,50 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <Arduino.h>
+
+#include "digital_in.h"
+#include "digital_out.h"
+
+
+int main() {
+    uint8_t cycle{0};
+    int8_t counter{0};
+    double ratio;
+
+    bool last_lo = false;
+
+    Digital_in encoderA{4};
+    Digital_in encoderB{5};
+    Digital_out led{5};
+
+    encoderA.init();
+    encoderB.init();
+    led.init();
+
+    Serial.begin(9600);
+
+    while (true) {
+        _delay_us(100);
+        led.set_lo();
+
+        bool curr_hi = encoderA.is_hi();
+
+        if (last_lo && curr_hi) {
+            counter += encoderB.is_lo() ? -1 : 1;
+            led.set_hi();
+        }
+        ++cycle;
+
+        if (cycle == 255) {
+            ratio = counter / (0.0255 * 700);
+            counter = 0;
+            cycle = 0;
+            Serial.println(ratio);
+        }
+        
+        last_lo = !curr_hi;
+    }
+
+
+    return 0;
+}

src/part1part2.cpp

@@ -0,0 +1,65 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <Arduino.h>
+
+#include "digital_in.h"
+#include "digital_out.h"
+
+class RotaryEncoderDriver {
+    int count{0};
+    bool last_lo{false};
+
+    Digital_out led{5};
+
+    Digital_in eA;
+    Digital_in eB;
+
+public:
+    RotaryEncoderDriver(unsigned short pin_a = 4, unsigned short pin_b = 5) : eA(pin_a), eB(pin_b) {
+        led.init();
+        eA.init();
+        eB.init();
+        last_lo = eA.is_lo();
+    }
+
+    int position() {
+        bool curr_hi = eA.is_hi();
+
+        if (last_lo && curr_hi) {
+            count += eB.is_hi() ? 1 : -1;
+            led.set_hi();
+        } else {
+            led.set_lo();
+        }
+
+        last_lo = !curr_hi;
+        return count;
+    } 
+
+};
+
+int main() {
+    uint8_t cycle{0};
+
+    RotaryEncoderDriver encoder;
+    Serial.begin(9600);
+
+    int prev_pos = encoder.position();
+    while (true) {
+        _delay_us(100);
+        int curr_pos = encoder.position();
+
+        if (cycle++ == 255) {
+            int delta = curr_pos - prev_pos;
+            float rpm = delta * 60.0f / (700.0f * 0.0256f);
+
+            Serial.print("Count: ");
+            Serial.print(delta);
+            Serial.print("\tRPM: ");
+            Serial.println(rpm);
+
+            prev_pos = curr_pos;
+        }
+    }
+    return 0;
+}

src/part3part1.cpp

@@ -0,0 +1,68 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <Arduino.h>
+
+#include "digital_in.h"
+#include "digital_out.h"
+
+class RotaryEncoderDriver {
+    volatile int count{0};
+
+    Digital_out led{5};
+
+    Digital_in eA;
+    Digital_in eB;
+
+public:
+    RotaryEncoderDriver(unsigned short pin_a = 4, unsigned short pin_b = 5) : eA(pin_a), eB(pin_b) {
+        led.init();
+        eA.init();
+        eB.init();
+
+        EICRA |= (1<<ISC01) | (1<<ISC00);
+        EIMSK |= (1<<INT0);
+    }
+
+    void update() {
+        count += eB.is_hi() ? 1 : -1;
+        led.set_hi();
+    }
+
+    int position() {
+        led.set_lo();
+        return count;
+    } 
+
+};
+
+RotaryEncoderDriver encoder{2,5};
+
+int main() {
+    uint8_t cycle{0};
+
+    Serial.begin(9600);
+
+    int prev_pos = encoder.position();
+    sei();
+    while (true) {
+        _delay_us(100);
+        int curr_pos = encoder.position();
+
+        if (cycle++ == 255) {
+            int delta = curr_pos - prev_pos;
+            float rpm = delta * 60.0f / (700.0f * 0.0256f);
+
+            Serial.print("Count: ");
+            Serial.print(delta);
+            Serial.print("\tRPM: ");
+            Serial.println(rpm);
+
+            prev_pos = curr_pos;
+        }
+    }
+    return 0;
+}
+
+ISR(INT0_vect) {
+    encoder.update();
+}

src/rotary_encoder_driver.cpp

@@ -0,0 +1,56 @@
+#include "rotary_encoder_driver.h"
+#include <avr/interrupt.h>
+
+RotaryEncoderDriver* driver = nullptr;
+
+RotaryEncoderDriver::RotaryEncoderDriver()
+    : cycle(0)
+    , count(0)
+    , prev_count(0)
+    , led(5)
+    , eA(2)
+    , eB(5) {}
+
+void RotaryEncoderDriver::begin() {
+    driver = this;
+
+    led.init();
+    eA.init();
+    eB.init();
+
+    EICRA |= (1<<ISC01) | (1<<ISC00);
+    EIMSK |= (1<<INT0);
+
+    timer.init(100);
+}
+
+void RotaryEncoderDriver::update() {
+    count += eB.is_hi() ? 1 : -1;
+    led.set_hi();
+}
+
+int RotaryEncoderDriver::position() {
+    led.set_lo();
+    return count;
+} 
+
+void RotaryEncoderDriver::update_delta() {
+    if (++cycle == 0) {
+        delta = count - prev_count;
+        prev_count = count;
+    }
+    led.set_lo();
+}
+
+float RotaryEncoderDriver::count_per_sec() {
+    return delta / (256.0f * 0.0001f);
+}
+
+
+ISR(INT0_vect) {
+    driver->update();
+}
+ISR(TIMER1_COMPA_vect) {
+    driver->update_delta();    
+}
+

src/timer_usec.cpp

@@ -0,0 +1,12 @@
+#include "timer_usec.h"
+
+void Timer_usec::init(uint16_t period_us) { // for custom duty cycle duration in ms in part 1
+    TCCR1A = 0;
+    TCCR1B = 0;
+    TCNT1 = 0;
+
+    OCR1A = period_us * 2 - 1;
+    TCCR1B |= (1<<WGM12);
+    TIMSK1 |= (1<<OCIE1A);
+    TCCR1B |= (1<<CS11);
+}

test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html