Selection of HAL library and STD library

vincent.liu

Selection of HAL library and STD library [Copy link]

 

Compared to the STD library, some statements seem to have become longer.

If you write code in KEIL, it feels really painful.

Of course, it has no effect on me. I write code in vscode, which has an amazing syntax prompt function. It can provide you with several options even if you write something randomly.

I heard from others that HAL has good compatibility, easy code porting, etc. It depends on personal needs.

But I think that ST has developed several libraries, including LL library and STD library, which is actually the same as e-commerce acquiring supermarkets.

The logic behind e-commerce companies acquiring physical entities is that no matter how much they promote or develop online, their market share is still the same, so they need to acquire offline supermarkets.

The number of people using the STD library is relatively fixed, so we need to develop another library. This newly developed library must be easier to understand, but the cost is that it takes longer to write...

Think about how simple register development is, a few lines of code can implement the function. STD library requires a lot of code.

Register development is like Bruce Lee's Jeet Kune Do. There are very few people who can use Jeet Kune Do. It is at the top of the pyramid structure, but it is the most efficient in terms of operating efficiency.

And there is only one Bruce Lee in the world.

As for library functions, most people can accept them, but the price is that they are more verbose. They can be said to be in the middle of the pyramid.

The code for HAL is much longer than that for STD, but more people can accept it, and only when more people use it can ST benefit.

ddllxxrr

I use the standard library. I have nothing to do with any other library.

Jacktang

Experts use registers

The standard library is enough.

freebsder

Experts use registers

annysky2012

There is no difference between the standard library and the Hal library

数码小叶

If this was still a problem two or three years ago, it is not a problem now. The HAL library is being replaced by the LL library. It is no longer the pure HAL library. The STD library has been basically eliminated.

LeoMe

The standard peripheral library gives you SPI_SendByte(), which can only send one byte at a time, and then use interrupts or queries to check whether the transmission is completed and send the next byte, thus completing the transmission of a buffer.

The HAL library will do the above work for you. It will give you the buffer address and length, and then you don't have to worry about it. After the buffer is sent, it may even prepare a "send completion callback" function for you.

HAL is a half-step upward. People who are used to the standard peripheral library are used to building a half-step upward by themselves. They can customize more functions (such as the UART start and end send callbacks, as well as the naming rules and interfaces of the HAL layer functions that they are used to), but it takes more time. The HAL library should be more popular with novices or people who switch from embedded systems. After all, it hides more hardware details and integrates better with cube. As for registers, just use LL.

eew_Violet

Hal is a re-encapsulation of std, which is less dependent on the underlying layer and easy to transplant. Hal and LL can be mixed. LL is used for parts that require efficiency, such as timers. In fact, the official hal library also has a fancy operation of calling the ll library. In addition, it is no longer the 51 era. The speed has increased and the price has decreased. The speed difference is not big. I like to mix hal and LL. It is beautiful.

damiaa

LeoMe published on 2021-4-8 14:19 The standard peripheral library gives you SPI_SendByte(), which can only send one byte at a time, and then use interrupts or queries to check whether the transmission is completed.

Everything is good, except the chip price.

ilovefengshulin

The use of registers is not recommended as it is not very readable.

hjl2832

What's so tangled about this? For a developer, time is money. If you work on a good project for half a year or a year, someone else might have already finished it before you. Therefore, major chip manufacturers are launching libraries, the purpose is to reduce the development cost of developers, save time, and produce products more efficiently. As for the efficiency problems caused by complex codes, with today's technology, they have long been perfectly covered by the technology updates of semiconductors. Think about the configuration of computer hosts ten years ago, and then look at the configuration of mobile phones now. Are you still worried about the low efficiency of code execution?

dragonhux

Simplify a myarmlib yourself and use your own