STM32CubeMX v4.24 - lack of USB LL drivers?

[Bogdan Golab]

Posted on January 24, 2018 at 21:59

Hi,

A question mostly aimed at ST - do you plan to release USB LL drivers?

At least for F1 & L4 USB LL drivers are not generated.

Bogdan

[Zang Man]

Posted on January 25, 2018 at 00:57

The

http://www.st.com/content/ccc/resource/technical/document/user_manual/2f/71/ba/b8/75/54/47/cf/DM00105879.pdf/files/DM00105879.pdf/jcr:content/translations/en.DM00105879.pdf

contains this note (Section 3 - Overview):

LL APIs are not provided for peripherals where optimized access is not a key feature, or those requiring heavy software configuration and/or complex upper-level stack (such as FSMC, USB or SDMMC).

So maybe there are technical limitations to having the LL API for USB?

[Andrew Neil]

Posted on January 25, 2018 at 01:33

Yes - I really wouldn't have thought that 'LL' was appropriate to stuff like USB.

[Bogdan Golab]

Posted on January 25, 2018 at 06:53

Yes, make sense. I just finished the development of  a USB bootloader where I use mostly LL drivers, and the only one consuming most flash is the USB. That's why I asked this question.