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Fiat Multipla dedicated wiki !!
http://www.canon.com/camera-museum/history/canon_story/1987_1991/densi.html :
http://photo.net/bboard/q-and-a-fetch-msg?msg_id=005nXu :
It's not just voltages, there is a serial communication protocol being used. Pinout and pin functions: Left to right, looking at the front of the body: 1. VBAT 2. P-GND 3. P-GND (pins 2 & 3 are common on the lens) 4. VDD 5. DCL 6. DLC 7. LCLK 8. D_GND Pin Functions VBAT - Motor power P_GND - Motor power ground VDD - Logic circuitry power D_GND - Logic circuitry ground DCL - Data from body to lens DLC - Data from lens to body LCLK - Clock Data protocol: Motorola SPI; 8 bit serial; Such as the protocol used with the 68HC05 chip. You will need access to the pins to experiment. Hack up the cheapest body you can find, such as a broken Rebel or whatever. Good luck, experiment on a cheap lens first!
EF232 Lens Interface Protocol Definition
(v40.12, released 27 June 2006)
General comments
- format of commands is <xx><val><cr>
- <xx> is a case insensitive two character string (a..z,A..Z)
- <cr> represents a byte with the value 13 , and will latch
a command and reset the input stream.
- <val> represents an optionally-signed decimal number (-,0..9).
- White space is not permitted.
- The adapter echoes all characters sent.
- Communication is 19.2Kbps, 8 data bits, no parity, on stop bit
(8n1).
- This release was tested with 34 of approximately
124 lenses manufactured by Canon.
- Version 31 and previous can be found at the following location:
Link
Links to Command Type: |
Commands List
| IdentifyLens | ||
| Syntax | id<cr> | |
| Response | OK<cr> <rval1>mm,f<rval2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests the lens' distinct identifier.
<rval1> is the current focal length in millimeters, and
<rval2> is the maximum aperture (i.e.
Minimum f-number). This command requires library version 10. |
||
| HardwareVersion | ||
| Syntax | hv<cr> | |
| Response | OK<cr> <val><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns hardware revision number.
Possible values are: 1, Canon EF. This command requires library version 10. |
||
| DefineFocusAxis | ||
| Syntax | df<cr> | |
| Response | OK<cr> <rval><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| NOT IMPLEMENTED. | ||
| MoveFocusInfinity | ||
| Syntax | mi<cr> | |
| Response | OK<cr> <rval>,<flag><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the focus mechanism move to
the infinity position. <rval> is the number of counts moved,
<flag> is 1 if the lens reports having hit a stop, and
0 if it hasn't. Note: some lenses do not return a 1 until the
second time the stop is hit. This command requires library version 10. |
||
| MoveFocusZero | ||
| Syntax | mz<cr> | |
| Response | OK<cr> <rval>,<flag><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the focus mechanism move to
the near focus position. <rval> is the number of counts
moved , <flag> is 1 if the lens reports having hit a stop,
and 0 if it hasn't. Note: some lenses do not return a 1 until
the second time the stop is hit. This command requires library version 10. |
||
| MoveFocusAbsolute | ||
| Syntax | fa<val><cr> | |
| Response | OK<cr> <rval>,<flag><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the focus mechanism move to
the specified focus count position, specified in counts moved
in <val>. If an input value would move the focus out of
the legal range the value is rounded to the boundary (i.e. Min/max
count). <val> is the actual position that the count has
been moved to, <flag> is 1 if the lens reports having hit
a stop, and 0 if it hasn't. Note: some lenses do not return a
1 until the second time the stop is hit. This command requires library version 11. |
||
| MoveFocusIncremental | ||
| Syntax | mf<val><cr> | |
| Response | OK<cr> DONE<rval>,<flag><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the focus mechanism move incrementally
the number of counts specified in the direction (sign) specified
in <val>. If the number of counts specified is out of range,
the mechanism will move as far as it can, <rval> is the
actual number of counts moved, <flag> is 1 if the lens
reports having hit a stop, and 0 if it hasn't. Note: some lenses
do not return a 1 until the second time the stop is hit. This command requires library version 10. |
||
| PositionOfFocus | ||
| Syntax | pf<cr> | |
| Response | OK<cr> <val><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests the current position of
the focus axis. This command requires library version 10. |
||
| FocusDistance | ||
| Syntax | fd<cr> | |
| Response | OK<cr> <val1>cm,<val2>cm<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests the focus distance. The
number is returned as two distances, <rval1> the near distance,
and <rval2> the far distance, both in centimeters, where
65535 represents infinity. Of the lenses tested thus far, eight
unique ranges are returned for any given lens, and only the "EF200mm
f/2.8L USM" and "EF28-105mm f/3.5-4.5 USM" return
this information. This command requires library version 10. |
||
| SetFocusCounter | ||
| Syntax | sf<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Sets the focus counter to the the
value specified. This command requires library version 10. |
||
| Initialize | ||
| Syntax | in<cr> | |
| Response | OK<cr> DONE<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests the lens interface to establish
a known state. The aperture will be reset to the full open position
and the position of aperture counter is reset to zero. This command
MUST be executed before Iris commands will work correctly. This
command is executed automatically every time a lens is changed
while the unit is powered up. If it is not executed before an
MoveApertureClose is issued, damage to the iris in the lens may
occur. This command requires library version 10. |
||
| DefineApertureAxis | ||
| Syntax | da<cr> | |
| Response | OK<cr> f<rval1>,<rval2>,f<rval3><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests a definition of the aperture
axis. <rval1> is the aperture value
associated with aperture position 0 in tenths of an fstop, <rval2>
= Number of distinct encoder positions (N), <rval3>
is the aperture value associate with aperture position N-1. This command requires library version 10. |
||
| MoveApertureOpen | ||
| Syntax | mo<cr> | |
| Response | OK<cr> <rval1>,f<rval2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the aperture mechanism move
to the full open position. <rval1> is the actual number
of steps the aperture was moved, and <rval2>
is the absolute position, of the aperture after executing the
move, in tenth f-stops. This command requires library version 10. |
||
| MoveApertureClosed | ||
| Syntax | mc<cr> | |
| Response | OK<cr> <rval1>,f<rval2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the aperture mechanism move
to the full closed position. <rval1> is the actual the
number of steps the aperture was moved, and <rval2>
is the absolute position, of the aperture after executing the
move, in tenth f-stops. This command requires library version 10. |
||
| MoveApertureAbsolute | ||
| Syntax | ma<val><cr> | |
| Response | OK<cr> <rval1>,f<rval2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the aperture mechanism move
to the specified encoder position, specified in half f-stops
indicated by the user in<val>. If an input value would
move the aperture out of the legal range the value is rounded
to the boundary (i.e. Min/max aperture). <rval1> is the
actual position that the aperture has been moved to in steps,
and <rval2> is the absolute position
in tenth f-stops. This command requires library version 10. |
||
| MoveApertureIncremental | ||
| Syntax | mn<val><cr> | |
| Response | OK<cr> <rval1>,f<rval2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Makes the aperture mechanism move
the specified number of encoder positions, in the specified direction,
in quarter f-stops indicated by the user as <val>. If an
input value would move the aperture out of the legal range the
value is rounded to the boundary (i.e. Min/max aperture). <rval1>
is the actual the number of steps the aperture was moved, and
<rval2> is the absolute position, of
the aperture after executing the move, in tenth f-stops. This command requires library version 10. |
||
| PostionOfAperture | ||
| Syntax | pa<cr> | |
| Response | OK<cr> <val1>,f<val2><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests the current position of
the aperture axis. <rval1> is the location in steps, and
<rval2> is the absolute position, in
tenth f-stops. This command requires library version 10. |
||
| DefineZoom | ||
| Syntax | dz<cr> | |
| Response | OK<cr> <rval1>mm,<rval2>mm<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Requests a definition of the zoom
axis. <rval1> is the minimum focal length in millimeters,
<rval2> is the maximum focal length in millimeters. This command requires library version 10. |
||
| ImageStabilization | ||
| Syntax | is<cr> | |
| Response | OK<cr> OK<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Begins image stabilization on applicable
lenses. Image stabilization will remain active and no new
commands can be entered until another key is pressed. This command requires library version 10. |
||
| ShutterState | ||
| Syntax | ss<cr> | |
| Response | OK<cr> <rval><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns the state of the shutter in <rval>. 1 = open, 0 = closed. This command requires library version 12. |
||
| ShutterEnable | ||
| Syntax | se<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Charges the shutter coil to 70 volts, allowing the shutter to open. When <val> is 0, the coil will be charged once. If <val> is any other value, the coil will be recharged every time the shutter is closed. This command requires library version 12. |
||
| ShutterOpen | ||
| Syntax | so<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Opens the shutter for <val> milliseconds. If <val> is 0, the shutter will remain open until a "SC" command is issued. This command requires library version 12. |
||
| ShutterClose | ||
| Syntax | se<cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Forces the shutter to close. This command requires library version 12. |
||
| ShutterHWInput | ||
| Syntax | hi<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Allows an input override of the shutters function. <val> = 1 enables Hardware input, <val> = 0 disables Hardware input. | ||
| ShutterHWOutput | ||
| Syntax | ho<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Enables the output pin (see electrical). <val> = 1 enables Hardware output, <val> = 0 disables Hardware output. | ||
| ShutterHWInputPolarity | ||
| Syntax | ip<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Sets the polarity of the hardware input pin. The shutter will open when
input pin = <val>, where a 1 indicates a high pin and 0 a low pin. This command requires library version 12. |
||
| ShutterHWOutputPolarity | ||
| Syntax | op<val><cr> | |
| Response | OK<cr> ERR<eval><cr> |
Command
understood Command completed with error |
| Sets the polarity of the hardware output pin, <val> = 1 enables Hardware output, <val> = 0 disables Hardware output. This command requires library version 12. |
||
| ShutterTime | ||
| Syntax | st<val><cr> | |
| Response | OK<cr> <rval><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| When the shutter is opened, the coil will be held at 7 volts for a certain amount of time before dropping to 5 volts. This command sets the 7 volt time
in milliseconds. <rval> is an echo of <val>. This command requires library version 12. |
||
| ShutterVoltage | ||
| Syntax | sv<val><cr> | |
| Response | OK<cr> <rval><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns the voltage across the shutter coil. This command requires library version 12. |
||
| BaudRate | ||
| Syntax | br<val><cr> | |
| Response | OK<cr> OK<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Sets the baud rate to a specified
value <val>. For applicable values, see baud
rate table. The response may appear at a different
baud rate and be indistinguishable. Once the connection
is reestablished at the new baud rate, the response "OK"
will occur when enter is keyed. This command requires library version 10. |
||
| BaudStore | ||
| Syntax | bs<cr> | |
| Response | OK<cr> DONE<cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Stores the baud rate in non-volatile
memory so the current baud rate will remain when the power is
cycled. This command requires library version 10. |
||
| SetResponseMode | ||
| Syntax | rm<cr> | |
| Response | OK<cr> <val><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Sets the response mode to either
verbose or non-verbose. "rm1" indicates verbose
mode (returns nothing), "rm0" indicates non-verbose
mode (returns 0). The result of this command will be stored in
non-volatile memory. When in non-verbose mode the return for
value for any command will be the least significant digit of
the error code, where 0 signifies a success. This command requires library version 10. |
||
| XModem | ||
| Syntax | xm<cr> | |
| Response | OK<cr> <string><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns a starter transmission character
every second until the data has been sent. The result after completion
is that of a power cycle. This command is used for updating the library - please go to the
XModem Tutorial
for further information on the use of this command. This command requires library version 10. |
||
| SerialNumber | ||
| Syntax | sn<cr> | |
| Response | OK<cr> <val><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns the unit serial number. This command requires library version 10. |
||
| VersionNumber | ||
| Syntax | vn<cr> | |
| Response | OK<cr> <val><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns the hardware/firmware revision
number. This command requires library version 10. |
||
| VersionString | ||
| Syntax | vs<cr> | |
| Response | OK<cr> <string><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns the version
string that includes the hardware/firmware revision level and
compile date. For v1.5 <string> is "EF-232 Lens Adapter,
v15, 26 March 2000.<cr>(c)1999,2000 Birger Engineering,
Inc.<cr>" This command requires library version 10. |
||
| LibraryVersion | ||
| Syntax | lv<cr> | |
| Response | OK<cr> <string1>,<string2>,<string3><cr> ERR<eval><cr> |
Command
understood Command completed without error Command completed with error |
| Returns three strings indicating
the version of the library. For example, a Canon EF Lens Controller
with library version 11 will return "Canon EF v11."<cr> This command requires library version 10. |
||
F-numbers returned:
These numbers represent the ratio of focal length to effective diameter of the lens multiplied by ten. More information on F-numbers can be provided to qualified customers after the execution of a non-disclosure agreement..
Baud Rate Conversion Table
Desired Baud Rate (bps) "br" Input Value 300 3 1200 12 2400 24 4800 48 9600 96 19200 192 38400 384 57600 576 115200 1152
Error Values:
1 - Could not parse command.
2 - Lens set to Manual Focus.
3 - No lens present.
4 - Distance information not available.
5 - Lens not initialized.
6 - Invalid baud rate.
7 - No shutter present.
8 - Insufficient power.
9 - Invalid library.
10 - Lens communication error.
Unique XModem Errors
1 - Time Out (transfer not started within allotted time).
2 - Error in transmission.
THIS IS THE ALL INCLUSIVE LIST OF ERRORS THAT ARE CHECKED FOR IN THIS REVISION.