31/1/14 Spectroscopy Lab
  Watching comms between Canon EOS 500N Camera (film) and 'Canon EF 135mm f/2L USM' lens mounted in IMSE frame.

Dout = Camera --> Lens
Din = Lens --> Camera

Dout        Din
00001010 0A 00000000 -- Busy poll
00000000 xx 10101010 AA hello

10010000 90 00000000 --
10001110 8E 00000000 --
00000000 00 00000000 00

10110000 B0 00000000 xx Req aperture data?
00000000 -- 00011000 18  = d 24
00000000 -- 00011000 18  = d 24
00000000 -- 01010111 57  = d 87

10100000 A0 00000000 -- 
00000000 00 00000000 00
00000000 -- 10000111 87  = 135, 135mm??

10110010 B2 00000000 --
00000000 -- 01111100 7A = d 122
00000000 -- 00000010 02 = d 2
00000000 -- 01000110 46 = d 70

10000000 80 00000000 -- Req lens data
00001010 0A 10000001 81  collision?
00000000 -- 10101110 AE
00000000 -- 00000000 00
00000000 -- 10000111 87 = 135mm lens (matches other's work)
00000000 -- 00000000 00
00000000 -- 10000111 87 = 135mm
00000000 -- 00000101 05
           
11000010 C2 00000000 --
00000000 -- 00000001 00
00000000 -- 10011111 9F
00000000 -- 00000001 00
00000000 -- 00100010 22
...
00001111 0F 000000000 --
.....
10010000 90 00001111 0F
10001110 8E 00000000 00
00000000 00 00000000 00
....

00001010 0A 00000000 00
00000000 -- 10101010 AA

10010000 90 00000000 00
10001110 8E 00000000 00
00000000 00 00000000 00

10110000 B0 00000000 00
00000000 -- 00011001 19
00000000 -- 00011000 18
00000000 -- 01010111 57

11000010 C2 00000000 --
00000000 00 00000000 00
00000000 -- 10011111 9F
00000000 -- 00000001 01 (orig C2 response had 00)
00000000 -- 00100010 22
..
00001111 0F 00000000 --

10010000 90 00001111 0F
10001110 8E 00000000 --
00000000 00 00000000 00


after touching shutter button (short seq), can't remember which side I was watching :(
00000000 00
11100000 E0
00000000 00
00000000 00
...
11000000 C0
00000000 00
11100000 E0
00000000 00
00000000 ??

after touch shutter button (long sequence, more common trigger)
00001010 0A 00001111 0F
00000000 -- 10101010 AA

10010000 90 00000000 --
10101001 A9 00000000 --
00000000 -- 00100100 24

10110000 B0 00000000 --
00000000 -- 00011001 19 (original B0 response was 18)
00000000 -- 00011000 18 (same as orig)
00000000 -- 01010111 57 (same as orig)

11000010 C2 00000000 --
00000000 00 00000000 00
00000000 -- 01011010 5A 
00000000 -- 00000000 00
00000000 -- 01011001 59
..

11110000 F0 00000000 --
00000000 -- 00011011 1B

10010000 90 00000000 --
10101001 A9 00000000 --
00000000 -- 00100100 24
..
rpt *many:
10010000 90 00000000 --
10101001 A9 00000000 --
00000000 -- 00100100 24
...