Fix some nice but mandarin chinese comments and replaced it with its google translation.
Should be buildable for now (cause some unexplicable build errors in first try).
Since GCC 10, the compiler defaults to -fno-common, thus variables with
multiple tentative definitions result in linker errors.
We've (me and @MrMoDDoM) extern-ed the shared variables to fix the issue.
Also, when I implemented ISR sharing, somehow I forgot about a function
which was shared as well, so I fixed that mistake and added a couple of
comments on how shared function calls work.
Another buffer used for store card->reader traffic is added, so that card->reader traffic sniffing can start right after the reader->Card trafic sniffing finished.
(cherry picked from commit e074fcc)
Federico Cerutti
The-White-Fox
Ave
Willok
Fabian
chenzitai
Georg
Timo Kasper
Simon Küppers