Programming in assembler for AVR microcontrollers requires appropriate tools that facilitate code creation, debugging, and optimization. Here are some popular software tools for AVR:
Microchip Studio (formerly Atmel Studio) is an integrated development environment (IDE) for AVR and SAM microcontrollers. It allows writing, compiling, and debugging code in assembler and C/C++. Microchip Studio offers support for a wide range of AVR devices and integration with programming and debugging tools.
AVR Toolchain is a set of tools that includes a compiler, assembler, linker, and standard and mathematical libraries. These tools are based on GNU projects and are available for Windows, Linux, and macOS. AVR Toolchain is ideal for developers who prefer working with command-line tools.
AVRDUDE (AVR Downloader/Uploader) is a tool for programming AVR microcontrollers. It allows uploading code to the microcontroller using various programmers. AVRDUDE is often used in conjunction with other tools, such as Microchip Studio, to provide a complete programming cycle.