I am looking for the source code for the firmware that comes loaded on the Nucleo-L4A6ZG board.

[CTrou.1]

 I downloaded the current release of the STM32CubeL4 firmware (V1.17) and there is no examples for that board.

[ChahinezC]

Hello @CTrou.1​,

As you already noted, there are no available example projects developed under the Cube Package for NUCLEO-L4A6ZG, neither a dedicated demos.

For Nucleo boards, the demonstration is simply a LED blinking examples. You can develop your own example for this board already supported by STM32CubeMX, CubeL4 contains the appropriate drivers for all STM32L4 part numbers, including STM32L4A6. To blink a led, you can refer to the step by step tutorial [Wiki STM32 step by step].

Chahinez.