I are trying to copy EEPROM on stm32f0. There is definitely an application note offered by STM.
![Stm32f0 Stm32f0](/uploads/1/2/5/0/125031377/779823037.jpg)
I am using STM32F051R8T6 to simply use the timer to count external pulses. I have referred the reference manual RM0091 and have used the function given in the Standard peripheral library. I am using PA9 to receive the external pulses, as per the code example given in the datasheet. The STM32Cube HAL layer is the replacement of the Standard Peripheral Library. The HAL APIs offer a higher abstraction level compared to the standard peripheral APIs. HAL focuses on peripheral common functionalities rather than hardware.
In the small sample
main.c
,FlashUnlock
is definitely a function used in STM standard peripheral library. However, I am using CubeMX that auto-generates program code that utilizes HAL motorists. Can beFlashUnlock
necessary to become known as before one can make use of the EEPROMemulation APIs? If yes !, what is the HAL equivalent for callingFlashUnlock
? Any specific configuration configurations to make on CubeMX to make use of EEPROM emulation?consumer6064424
1 Reply
ST Microelectronics did provide sample code making use of HAL motorists. The issue is certainly their documentation is definitely all over the location and googling may not really land you the right page.
This can be the correct document for you.
Research for 'EEPROMEmulation'. You will discover that the example code will be provided under NUCLEO -F091RC firmware examples. The test code should remedy your questions.
consumer781486consumer781486
Só I'meters switching from PICs to ARM and I purchased an STM32F4 finding board.So considerably I understand that to plan it you can either access all signs up straight in memory space (apparent way) and furthermore there are usually 3 primary your local library you can make use of to make your existence easier.Today my query will be, which one óf those 3 (CMSIS, HAL, Std Peripherals Lib) will be the nearly all LOW degree one? ie. the one with the less overhead. My objective is certainly to learn the controller's inner workings and not create my existence much easier (just a little), therefore I would like to know which of these will be closer to the primary without resorting to make use of set up.
DavidBob
4 Solutions
Definitely the CMSIS. It is certainly not precisely a library, it mainly contains meanings for the different signs up.
It is usually precisely what one demands to gain access to the microcontroller'h registers simple, so as to apply his/her very own HAL. It provides no over head, since you just gain access to the signs up.
Maintain in mind that CMSIS, unlike the additional two, is defined by Limb and not ST. This indicates that the several CMSIS libraries out there for the different microcontrollers are quite identical, which significantly assists in portability.
Additionally, CMSIS will be the simpler a single so it will be (IMO) the nearly all versatile, and many reliable, with probably much less (or no) pests. Some hal libraries for the various mcu'h that I've utilized are quite notorious for their insects.
On the some other hands, CMSIS demands quite more work from you. It can be however my personal option, since I choose to invest my time creating high quality your local library, that match my needs, and knowing how the nick works, that just spending period to understand just a fresh Iibrary.
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Fótis PanagiotopoulosFótis Panagiotopoulos
$éndgroup$Tó find out how it works you need to make use of nothing of the above. Obtain an left arm get across compiler and thé documentation fróm st, carried out. Start code. these chips are usually really easy to plan. the documentation informs you what parts in what signs up do whát.
Any/aIl of these your local library are intended to eliminate that knowing/burden/work fróm you and create it experience like a just call an api like software programming encounter. Which is definitely what a lot of folks need. You can use all of the resource for these your local library to assist understand, but as you obtain much better at it you discover holes and troubles in the libraries, sometimes very scary program code. code tossed together, written generically and roughly ported from one nick to another, possibly supporting features your chip doesnt have, etc. And they all have got an excessive quantity of over head. 10 to 100 moments too much program code for the job, certain a great deal of it may boost aside but why have got it right now there in the initial location?
Whether you proceed your very own or make use of one of these your local library, you should still appear at the resource for the your local library you use to notice if you are usually comfortable with what they are performing, if it makes sense, matches the nick documentation, etc. When something goes wrong you are usually likely getting to get through their stuff as very much as yours to find out why.
Notice the chip docs are usually not ideal either, that is component of the enjoyment.
I dont recognize why assembly comes upward in a conversation about bare metal development. You can obtain by with extremely little assembly. For these cortex-m potato chips, you theoretically only need this much asm to get bootéd:
Yóu cant depend on information nor bss ánd you cant come back from major with that minimal of asm. But that is usually all the asm you NEED for the barest of bare metal. Now if you want to do interrupts you need more posts in the vector table. more.term ranges. I suggest more asm, but probably 10 or 20 outlines even more.
this is certainly typically all the asm I use.
Yeah it states cortex-m0 but this is actual bootstrap for my meters4 program code. I prefer this to be thumb not thumb2. And I just reuse this code from one cortéx-m to anothér, changing the collection pointer address as needed, so it functions for meters0, m3 and michael4. I dont have got an michael7 yet nor possess I explored it much.
Allowing the fpu might need a several more ranges of asm as specific instructions are usually needed. But the stage can be dont confuse low level programming and asm. D offers what you require to configure the nick, as well as write an program. The libraries you are usually speaking about are usually written in D not asm, therefore certainly they dont want to make use of asm either.
If you wish to find out the internal workings, compose your very own code. Dont use these your local library other than as a referrals. Occasionally it can be less complicated to just crack at it than consider to read through through their program code. (not simply ST but aIl of the suppliers. One of the vendors had a line of program code so growing I use it as a interview question, nope not really going to publish it here).
ST certainly but some other vendors mainly because properly, to conserve power, have got clock enables for sections of the chip, so before you move in and consider to blink an brought, you need to find the enable bit for that gpio block out and see if it arrives out of reset to zero allowed, if not then allow it, speaking to that gpio logic without a clock allowing it basically weighs the processor chip as it can be waiting for a response from reasoning that never ever will respond. They dont always inform you about these enables. Once enabled then they occasionally stroll you through thé init for somé particular peripheral. ST docs are pretty good. Coming from microchip which will get a quite bad grade for documentation, you shouldnt possess a issue.
oIdtimeroldtimer
$éndgroup$l possess used both, simply bare metallic register access and the a sexually transmitted disease peripheral library. I discover it easier simply to offer with the signs up. Furthermore if you are making use of a debugger you can watch the signs up and confirm they consist of what you designed them to be. I think you do learn even more about the procedure of the nick in that method furthermore.
Joé McCarronJoé McCarron
$éndgroup$Cómming from the 8bit planet I was always used to programming peripherals via registers. Microcontroller data bed linens (i actually.at the STM32 reference manuals) explain the peripherals solely in sign up notation. Since the developer must learn this very same documentation to understand about the peripheraI funtions and functions before any try is made to make use of it after that it seems natural to me to begin encoding the signs up. With carful code design and commenting I discover the code can become pleasantly to read through and enhance even after coming back again to it weeks later.
AdámAdam
$éndgroup$