nrf24 | package allows interaction with nRF24LU1 based dongles

I've got some software compiled to run on an embedded NRF24 target, using a gcc-arm-none-eabi toolchain from here (a custom one that provides gdb with support for python3) . I'm trying essentially, malloc an array from the GDB debugger console at runtime, then fill it with elements that I provide.

I have a pointer defined in a .c file like: static float32_t *array;. I want to then call a cmd like: call (void*) malloc(num_of_elements*sizeof(float32_t)) from inside the GDB console to allocate an array at runtime, and then fill it with elements with something like maybe: call (void*) memcpy(array, {var1, var2... var n}, n)

My issue is the GDB debugger cannot find the malloc stdlib function. If I do something like:

I need to execute several commands in the background with Tkinter repetedly but mainloop() does not allow me to use while.true. If I use While true with the mainloop in the end, the code in while true is executed only once.

So I found this solution. I moved all the content inside while true to a function called "sinyal" and then I used .after to call that function as it was written there. Now some of my code is executed repeatedly as I want (like receiving data from arduino repetedly) but I lost all my canvasses and thus images. I cannot see any images drawn on the screen.

btw this is a weather station project on raspberry pi. Pi receives weather data from arduino via radio transmission, parses data, shows it on labels and shows certain images on the screen based on said data (gauges).

Right now all I can see is black background and labels with the values in them. None of the images I want to be drawn is there. What could be the reason of this?

Code: