how can i get old version of hal or expansion board library?

[Zhou JianQiang]

I found when newer version library release, old version will remove from official site, but it remove old expansion board too, but i need old expansion board code. so how can i find old library?

[Tesla DeLorean]

Perhaps ask specifically for the "expansion board" in question, hard to help with a non-specific request.

The CubeMX tool can download older HAL releases, I've posted links to mirrors.

Google, in uncensored form, is good at finding downloads and repositories on the interwebs.

[Zhou JianQiang]

thankyou for your reply.now i know how to download old version hal library. the question become how to download old version expansion board library. by the way, i search it in baidu, google, even github, but find nothing