Support and General Use > Hardware
Sansа Clip Zip - Improve battery life
johnb:
--- Quote from: rbert on February 09, 2015, 11:39:23 AM ---
--- Quote from: Mihail Zenkov on February 09, 2015, 11:17:38 AM ---Yes, very strange. Can you try 0x80 | 47 + attached patch?
--- End quote ---
Thank you very much, it works.
Now I can test lower voltages.
EDIT:
no problems with 0x80 | 20
I can now confirm, that my fuzev2 variant0 works like a charm with
- Patch Set 7 471ced2d0f1df1f6e53824197c93e52563fdac3a
- rockbox-restore_irq.patch.txt
- the same changes in firmware/export/config/sansafuzev2.h as in the other config files
EDIT2:
for anyone else to test:
http://gregory.bplaced.net/rockbox/rockbox-fuzev2-1.7z
--- End quote ---
My daughter just got an ' Undefined instruction set ...' crash with this build.
Mihail Zenkov:
--- Quote from: johnb on February 15, 2015, 03:33:43 AM ---My daughter just got an ' Undefined instruction set ...' crash with this build.
--- End quote ---
It was only once or regularly? In which conditions (step to reproduce)?
rbert:
Can you replace my "irq" patch with patch from jhMikeS and test it?
johnb:
--- Quote from: Mihail Zenkov on February 15, 2015, 06:03:32 AM ---
--- Quote from: johnb on February 15, 2015, 03:33:43 AM ---My daughter just got an ' Undefined instruction set ...' crash with this build.
--- End quote ---
It was only once or regularly? In which conditions (step to reproduce)?
--- End quote ---
So far this was the only occasion (I run it in parallel on my fuze).
What she told me she was doing is: while listening to a song, she went into the file browser and selected a track -> then crashed
rbert:
--- Quote from: Mihail Zenkov on February 15, 2015, 06:03:32 AM ---rbert:
Can you replace my "irq" patch with patch from jhMikeS and test it?
--- End quote ---
OK, I just compiled and tested
- Enable frequency and voltage scaling on the AMSv2 devices. http://gerrit.rockbox.org/r/#/c/1062/ Patch Set 7
- then I cherry-picked jhMikeS patch http://gerrit.rockbox.org/1145/
- and made my changes to firmware/export/config/sansafuzev2.h
Once I got an "Undefined instruction at 300C7BD8",
but otherwise the fuzev2 hangs completely
or only the scroll wheel works, but skips menu items and doesn't react to button presses and usb
jhMikeS:
Okay, it doesn't appear to be a race condition. There's should no race condition in the patched driver. I wonder if certain things happening, like interrupt processing, during a voltage change can cause glitches in operation. I really should patch my Fuze V2 with this scaling patch and dive deeper.
Who has which variant? Mine is variant 0.
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