UnoLib

UnoLib is a Pascal library designed for the Arduino Uno platform and AVRPascal or other editor using FPC 3.3.1 for AVR microcontrollers (e.g. FreePascal IDE, Lazarus). It is a translation of a subset of the standard Arduino libraries, adapted as needed for a Pascal environment. Moreover, support for fixed point numbers has been added.

Written by @ackarwow in collaboration with @Dzandaa (from 2024)

Library modules included:

• analog.pas - support for analog pins
• defs.pas - definitions of constatnts, bit manipulations, port support
• dht.pas - support for DHT11/22 sensors
• digital.pas - support for digital pins
• ds1302rtc.pas - support for ds1302 real time clock
• fix16.pas - support for fixed point numbers
• float32.pas - support for floating point numbers, basic arithmetic and trigonometric operations (in collaboration with @Dzandaa)
• hardwareserial.pas - support for serial communication
• liquidcrystal.pas - support for LCD
• timer.pas - time-related routines

The library modules are located in the "lib" directory.

The "examples" directory contains simple sample programs using UnoLib modules:

• TestBlink.pas - turns on and off the built-in LED
• TestBlinkWithoutDelay.pas - turns on and off the built-in LED using Millis
• TestDHT11.pas - displays information about the temperature and humidity of the air from the DHT11 sensor on an external LCD display
• TestDigital.pas - turns on and off the built-in LED based on the button state
• TestLCAutoscroll.pas - scrolls text on the LCD display
• TestLCBlink.pas - displays the text "hello, world!" on the LCD display
• TestLCChars.pas - displays non-standard characters on the LCD display
• TestLCCursor.pas - turns the cursor on and off on the LCD display
• TestLCDisplay.pas - displays and turns off the text "hello, world!"
• TestLCSerialDisplay.pas - displays characters taken from the serial port on the LCD display
• TestLCTextDirection.pas - changes the direction of text display on the LCD display
• TestLM35.pas - displays the temperature value from the LM35 sensor on the LCD display
• TestSerial.pas - sends and receives data via the serial port

Some extra code is placed in "extras" directory:

• ccrause_blink_leonardo.pas - blink example for Arduino Leonardo based on code written by @ccrause
• ccrause_delay.pas - delay module based on code written by @ccrause
• cdc.pas - CDC support for Arduino Leonardo
• usb.pas - USB support for Arduino Leonardo
• wdt.pas - watchdog timer routines

Lazarus test projects are placed in "tests" directory:

• conversion - routines for numeric and string conversion and data preparation for CORDIC algorithm (by @Dzandaa with collaboration of @ackarwow)
• float32 - test programs for testing TFloat32 type both on Lazarus and on Arduino side (based on serial port communication program by @Dzandaa)
• serial - serial port communication test (by @Dzandaa)

Before compiling a given program, make sure that the library modules listed in the uses section have already been compiled.

Changes

version 0.9 - 21/01/2025 (AVRPascal 3.1)

• added float32.pas module supporting 32-bit floating point numbers (in collaboration with @Dzandaa)
• added test programs for serial communication, TFloat32, and conversions, placed in "tests" folder (written by @Dzandaa, some of them modified by @ackarwow)

@Dzandaa started collaborating on the development of UnoLib.

version 0.8 - 09/12/2024 (AVRPascal 3.0)

• added extra code for Arduino Leonardo ("extras" directory)
• modified $IFDEF conditionals for compatibility with FPC 3.3.1 defines
• inlined routines in defs.pas and timer.pas
• added default result of functions in defs.pas
• added THardwareSerial.ReadByte in hardwareserial.pas
• added Fix16Sqrt routine in fix16.pas

Thanks to @Dzandaa for suggestions and implementation of THardwareSerial.ReadByte

version 0.7 - 18/11/2024 (AVRPascal 2.9)

changes in hardwareserial.pas:

• added THardwareSerial.WriteBuff for writing buffer of bytes
• added THardwareSerial.ReadBuff for reading buffer of bytes
• THardwareSerial._begin renamed to THardwareSerial.Start, THardwareSerial._end renamed to THardwareSerial.Stop
• added THardwareSerial.Read for Arduino compatibility

Many thanks to @Dzandaa, @ccrause, and @VisualLab for suggestions and discussion

version 0.6 - 19/10/2024 (AVRPascal 2.6)

• changed conditional directive, added arduinonano
• fixed problem with millisecond counter in lib\timer.pas
• added examples\TestBlinkWithoutDelay.pas

Thanks to Henk Heemstra for source code of TestBlinkWithoutDelay.pas

version 0.5 - 18/07/2024 (AVRPascal 2.0)

• changed conditional directive, atmega328p or arduinouno required

version 0.4 - 31/10/2023 (AVRPascal 1.2)

• added conditional compilation directive {ifndef} for atmega328p; requires AVRPascal installed

version 0.3 - 28/09/2023 (AVRPascal 1.0)

• minor technical changes

version 0.2 - 18/04/2022

• added hardwareserial.pas module

version 0.1 - 06/01/2022

• primary version