variable sharing across multiple .c files

[Yoshimitsu_Manji_clan]

Good evening all community members,

I am using STM32F4 board. My current project has multiple .c files to have a modular approach. ADC files is working on its own interrupt and another file called gpio file working on timer2 interrupt. I got a sensor's value from ADC  and i want to use this value in gpio file. Trying my best, i am not able to share adc variable's data to gpio file. Request if someone could guide me what is it that I am doing wrong here??

regards and thanks...!

[Andrew Neil]

This is standard C - not specific to STM32:

https://community.st.com/t5/stm32cubeide-mcus/adding-new-c-source-files-to-my-project-and-navigating-through/m-p/657455/highlight/true#M25847