http://chdk.wikia.com/wiki/FAQ#Q._Can_CHDK_damage_your_camera.C2.A0.3F έγραψε:Q. Can CHDK damage your camera ?
Short answer: Yes. It is unlikely, but theoretically possible. As stated above CHDK comes with no warranty for any use; you use it at your own risk. CHDK is created by reverse engineering an undocumented system that directly controls hardware. Because of this, it is impossible to be certain that it is completely safe. There have been no confirmed cases of CHDK damaging a camera, but in some cases it would be very difficult to distinguish between coincidental failures and failures caused in part by CHDK.
Long answer: It is unlikely that CHDK will permanently harm your camera. Both the original firmware and the CHDK developers do their best to avoid situations where this could happen. There are at least three ways in which CHDK could theoretically do damage:
1. By commanding physical hardware to do something it was not designed to do. For example, it is possible to command the lens hardware to move when the lens is closed. It is also possible to move lens hardware beyond limits allowed by Canons firmware, using scripts or overrides. See UBASIC/Scripts:_Tele-Macro-Mode and Talk:UBASIC/Scripts#Tele-Super-Macro_Mode_Comments. It's worth noting that neither of these cases have resulted in actual damage, and both required direct input from the user. Any extreme override that relates to physical hardware may also fall into this category.
2. By overwriting the internal flash ROM where the Canon firmware is kept, rendering the camera un-bootable. Since CHDK does not ever intentionally write to internal flash, it would take an extremely unlikely sequence of events to make this happen.
3. By sending invalid information to a Canon function that ultimately causes something to be written to internal flash ROM.
If you are concerned about this, you can minimize your risk by avoiding untested development builds (test builds posted on the forum, early betas, new hardware related features), being careful about what scripts you run, and avoiding extreme overrides. Ports that have been in circulation for a long time are likely to be safer than brand new betas.
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