CubeMX CANBUS LL Library Support

[embeddedguy1]

I have an STM32F407G discovery development kit. I activate CANBUS while doing pin configuration via CubeMX. Then in project manager > advanced settings > driver selector tab, I can select both LL library and HAL library in all options such as GPIO, DMA, USART, ADC. But when I want to select LL library for CANBUS, I see that only HAL library is available. Why is there no LL support for CANBUS in CubeMX? Is there any way to add it? I would appreciate if you can help me.

[SofLit]

Hello,

Not all peripherals have LL driver including CAN.

[embeddedguy1]

That's what I'm talking about, why do you answer just to answer?

[Andrew Neil · Accepted solution]

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@embeddedguy1 wrote:

Why is there no LL support for CANBUS in CubeMX? .

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Because there is no support for CAN in LL at all - CubeMX cannot add support that does not exist!

The available HAL & LL support is documented in UM1725, Description of STM32F4 HAL and low-layer drivers:

https://www.st.com/resource/en/user_manual/um1725-description-of-stm32f4-hal-and-lowlayer-drivers-stmicroelectronics.pdf

via: https://www.st.com/en/embedded-software/stm32cubef4.html#documentation 

You can see that there is no LL CAN support

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@embeddedguy1 wrote:

 Is there any way to add it?

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No - because it does not exist.

See also:

https://community.st.com/t5/stm32-mcus-products/simulink-code-generation-support-for-stm32f407g-disc1-can-bus/m-p/728438/highlight/true#M262690 

[SofLit]

Because there is no LL driver for CAN. See this thread: https://community.st.com/t5/stm32-mcus-products/simulink-code-generation-support-for-stm32f407g-disc1-can-bus/m-p/728438/highlight/true#M262690