initial findings

README.md

@@ -1,3 +1,5 @@
 # Sony-e-mount
 
-My RE findings about sony e-mount
+My RE findings about sony e-mount
+
+Reverse engineering was done on alpha 5000 and tamron 28-200mm F2.8-5.6 Di III RXD lens

aperture.md

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+# Aperture messages
+## Control (from Body to Lens)
+Example message, space separated header, payload and checksum:
+```
+f02000018503 3f7500001400141c0000020101030002010000002f1516 050255
+```
+| payload byte no. | vales, meaning |
+| ---------------- | -------------- |
+| 1 | changes when focusing: 1d = AF, 4C = MF, 3F = when no focus is done |
+| 4,5 | aperture control range: 1413 for F2.8 -- f417 for F16 |
+| 6,7 | same values as 4,5 |
+| 12,13 | each oscillate between 00 and 01, so I use them as odd or even counter |

focus.md

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+# Focus messages
+## Control (from Body to Lens)
+Sample message:
+```
+f01600017904 00001983000066000000410000 d70155
+```
+| Byte | meaning |
+| ---- | ------- |
+| 4 | auto or manual focus switch: 81 = MF, 83 = AF
+| 7 | d6 when in DMF and focusing, else 66 |
+| 10 | 80 when autofocus, else 00 |
+| 11 | 09 when in DMF and manually focusing, 01 normally, 41 autofocus active |
+| ... | ??? |
+
+## Info (from Lens to Body)
+Sample message:
+```
+f03000014506 0204db49000010f23ed74bd5000c0000000000007b4a00008a0000000000000019131416141515 cc0655
+```
+| Byte | meaning | range / note |
+| ---- | ------- | ----- |
+| 1 | limit flags | normal 02, 0A bottom limit, 12 top limit |
+| 2 | focus speed?? | |
+| 3-4 | focus pos | closest: d74b, furthest: f43e |
+| ... | ??? | |
+
+minpos:
+```
+f0 3000 01 47 06 0a 00 d74b 000010f23ed74bd5000c000000000000d24b00408a0000000000000000000000000000d40655
+```
+maxpos:
+```
+f0 3000 01 b7 06 12 00 f43e 000010f43ed54bd5000b000000000000f43e00408a0000000000000000000000000000700755
+```