Firmware Development for Multi-phase Motor Controller

The project is to develop firmware for driving a multi-phase motor controller. The motor drive system has a power converter that accepts PWM signals for powering individual phases, and on-off signals for energizing or disabling a particular phase. The power converter control algorithms will have to be implemented as firmware in a MCU board based on ATMega4808 (Microchip, 28 pin AVR microcontroller). The control logic and on-off timing strategy will be provided as flowcharts and truth tables. Prefer minimal use of Arduino and other third-party libraries to (1) keep the flash memory as small as possible (even though we have luxurious 49 kB flash in ATMega4808), (2) to reduce dependencies.