TRY TO CREATE MY OWN LIB but SPI_Handler couldn't get recognized

[SKAŞ.1]

Hello folks,

I want to create my own library.

However, it seems I cannot send SPI_HandleTypedef between the main source and my library file.

 

My codes are not even close to the finish, but I placed in here so that maybe I have different issues that I may miss.

*FOR THE ONES WHO ARE CURIOUS:

I am planning to get data from UART (I DON'T KNOW WHY BUT I COULDN'T RUN VCP), and get time via RTC. Lastly, print that info in a presentable shape to LCD.

I use Tilen Majerle codes (for SPI initializing). https://github.com/MaJerle/stm32f429/tree/master/08-STM32F429_ILI9341

I couldn't be able to make LCD work on my own. I thought maybe I have a problem with SPI initializing. that's some irrelevant info but for someone who is interested.

Thanks for your attention and help,

Kind Regards.

Serkan KAŞ

[TDK]

Go into stm32f4xx_hal_conf.h and ensure the SPI module is enabled.

Ensure you're including "stm32f4xx.h" before using any HAL functionality.

[SKAŞ.1]

in stm32f4xx_hal_conf.h, SPI module was already enabled.

I also include stm32f4xx.h header in my main, but It seems still giving errors.

*I am sorry I reply too late, due to the time difference.

[TDK]

You need to include HAL functions prior to using them.

So include stm32f4xx.h before you use them in ILI9341.h.

[SKAŞ.1]

that doesn't work either.

Should I write something like

#ifndef SPI

#define SPI

#endif

into ILI header file?

[SKAŞ.1]

Well actualy, even that doesn't worked.

However, when I include stm32f4xx.h file into ILI library it erases the error.

But is it the correct way to do it this way, when I also have #include "stm32f4xx.h" at main?

[Sebastiaan · Accepted solution]

Every c-file needs to be compilable individually (i.e. the compiler needs to be able to find all the variable types, function signatures, ...).

So yes, wherever SPI_HandleTypedef is used, you need to include the file where that type is defined.

by including stm32f4xx_hal, you will automatically include stm32f4xx_hal_spi where the type is defined.

Typically, when creating a larger program using various interfaces, stm32f4xx_hal.h will be included in many c-files (or even in your custom header files).

[TDK]

You're showing code in main.c but your errors are coming from ILI9341.c. Why are you marking your own posts as answering the question?

[SKAŞ.1]

I mean, at top of the post, you suggest me to define stm32f4xx lib to before ILI9341 lib right? Did I misunderstood?

Anyway, the solution was, as both me and Sebastian said, when I include stm32f4xx library in ILI9341.c, it fixed.

So, I got answered of my question.