AVRPascal is a free IDE designed for programming AVR microcontrollers (ATtiny and ATmega families) in the Pascal language. It uses the Free Pascal compiler for code generation and AVRdude to program microcontrollers using common programmers like USBasp or an Arduino. Key features:

• Syntax highlighting for improved code readability.
• Error indication: Points to the line of code containing compilation errors.
• Tooltips: Provide information about function and procedure parameters, record fields, and class methods.
• Tabbed document interface for efficient code organization.
• Microcontroller fuse-bit configuration capability.
• Automatic detection of supported USB devices.
• Source code formatter.
• Serial port monitor for Arduino boards.

UnoLib is an open-source Pascal library designed for the Arduino Uno platform (ATmega328p microcontroller). It is a translation of a subset of the standard Arduino libraries, adapted as needed for a Free Pascal environment. Moreover, support for fixed and floating point numbers has been added. Modules included:

• analog.pas - support for analog pins
• defs.pas - definitions of constants, 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 (in collaboration with @Dzandaa)
• hardwareserial.pas - support for serial communication
• i2c.pas - support for I2C communication bus (by @Dzandaa, many thanks to @ccrause)
• liquidcrystal.pas - support for LCD
• pulse.pas - routines for reading a pulse on a pin
• stringutils.pas - string conversion routines (by @Dzandaa)
• timer.pas - time-related routines
• tone.pas - square wave tone routines

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Debugger for AVRPascal, based on the DebugWire protocol. It communicates with AVR microcontrollers using a USB-UART converter, installed in the operating system as a virtual serial port. AVRPascalDbg works with adapters based on the FT232, PL2303, or CH340 chip. The debugger has basic debugging functionality such as starting, interrupting, and resuming the program, adding breakpoints, and viewing register values of the microcontroller. The limitation of the demo version of AVRPascalDbg is the maximum size of flash memory that can be loaded into the microcontroller, which is 350 bytes.