docs

Timers:
  TIM1 - periodic can messages
  TIM2 - debouncing timeout
  TIM3 - zone beep/open timeout




$ cat cancrap 
 0 0 0 0 0 0 0 0 0 0 0

 
CONTROLLER -> ALLREADER
 0 T T T T 0 0 0 0 0 0

 
CONTROLLER -> READER
 0 T T T T X X X X X X


CONTROLLER <- READER
 1 T T T T X X X X X X
 
 1 0 0 0 0 1 1 1 1 1 1

T T T T
-------
0 0 0 0
       <-  VERSIONINFO
           Wersja, info, bardziej dla ludzi, 8 znakow
 
0 0 0 1
        -> STATUSREQ [RTR]
       <-  STATUS
           00   00 00 00 00 00 00
           ^       TX    RX    ERR
           | 
            - mode (00 - normal, 01 - bootloader)
 
0 0 1 0
        -> INRDREQ [RTR]
       <-  INRD
           00
           ^- stan portu (8 bitow)
0 0 1 1
        -> OUTRDREQ [RTR]
        -> OUTSET
           00 
           ^- nowy stan portu
       <-  OUTRD
           00 
           ^- stan portu
 
0 1 0 0
        -> SCANRESP
           00 - OK
           01 - REJECT

       <-  SCAN
           00 00 00 00
           ^- id breloczka

0 1 0 1
       <- BTNCLICK
          00
          ^- id przycisku

0 1 1 0
       <- GPIO INTERRUPT
          00
          PIN