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Starting with the HAL_Drivers

Hello, first, maybe I'll make some mistakes in English, I'm sorry about it.

I've bought a STM32F4-discovery and I want to do my degree final project with it, but I'm so confused because I have searched a lot how to start with a simple blink example, and for now I can't do it. Probably, it might be because I'm not able to distinguish between the "good documentation", so it would be really helpful if you could answer me some questions:

1-I've read about using the HAL Drivers and the STDPERIPH_DRIVER libraries, but I couldn't understand what are the differences, and for example, if I'm using the version 5.14, how should I use it?

2-I've tried some examples using the HAL drivers, and always, or my code doesn't work or it has a lot of compilation errors, and I think I'm doing something wrong with the includes, or with the libraries, but I can't identify how to solve... Could you give me some advises, please?

Thanks.