Not being a developer and being new to ML, I don't know how useful this is, but a firmware update has been released for the 40mm STM pancake lens. It's for use with the EOS-1D X, 5D Mark III, and 650D.
The update is firmware version 1.2.0, can be downloaded from the following site (Japanese):
http://www.usa.canon.com/cusa/support/professional/lenses/ef_lenses/ef_40mm_f_2_8_stm#DriversAndSoftware
I'm very much wanting to see Magic Lantern on the 650D, which I recently purchased. While I know that lens firmware may not help port ML to the 650D (I guess it would depend on how the 650D handles the lens firmware), I just thought I'd share this information just in case.
Unfortunately, I only have the 18-135 STM lens at this time, so I can't help investigate.
hello iam from Argentina I have the canon t4i or 650 too and i have the lens 40mm stm is a good lens. I like test if you have a beta version of ML.
They now have a separate lens firmware update. So still no useful firmware for the 650D :(
See here
http://magiclantern.wikia.com/wiki/LensFirmareUpdate
Indy
I've read in some website that, communication between the camera and the lens is made with the SPI protocol.
You may be able to intercept the communication between the two components and obtain any additional information.
There are some extenders on the market that can help create a spy hardware.
Of course, it would be necessary to have such equipment, and preferably an oscilloscope.
The commincation is between the Lens and the Tx Chip, so we need to run some code on that first
Quote from: nanomad on October 30, 2012, 11:22:02 PM
The commincation is between the Lens and the Tx Chip, so we need to run some code on that first
Yes, I understand!
but...
I believe someone has done this before.
There are some equipment market to engage in manual lenses that allow you to the AF indication focus.
I do not believe it was the canon to provide them with the necessary documentation.
Well, they simply R.E. the communication between the lens chip and the Tx Chip. In this case the emulation of the lens protocol proved to be easier than hacking the entire camera ;)
See http://chdk.setepontos.com/index.php?topic=1331.msg55936#msg55936
about lens protocol
Quote from: Indy on November 03, 2012, 06:55:57 PM
See http://chdk.setepontos.com/index.php?topic=1331.msg55936#msg55936
about lens protocol
Thank you