library adding problem

Hello

i use stm32f103ve board.

I have been trying to realize a project for a few months.

but unfortunately I could not move forward at all.

I am trying to add lcd library using the Keil program.

the operations I have done are as follows:

I select my processor from cubemx, define pin and generate code.

Then I added lcd.c library to the "Driver / Hal_Driver" section.

I specified the path to the .h file from the "options / c-c ++" include paths settings.

After compiling it gave the error that the gpio.h file could not be found.

I downloaded the gpio.c and .h files from github and added the library to the "Driver / Hal_Driver" section and specified the path.

but still doesn't see the gpio.h library.

I saved the gpio.c libraries as follows:

I went to the project file I created.

I say new-text document and paste it.

I say save with difference and specify the .c and .h files.

tell me where I made the mistake