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Sansа Clip Zip - Improve battery life

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rbert:

--- Quote from: saratoga on February 07, 2015, 02:35:09 PM ---Does anyone want to try raising the voltages one by one and see which one was set too low?

--- End quote ---
OK, but it would be helpful, if I had your source code changes.
I tried setting CVDD2 and CVDD1 by changing two lines in system-as3525.c and I still had crashes.
Here's what I tried:

--- Code: ---/* Set CVDD2 power supply for fuzev2 */
ascodec_write_pmu(0x17, 2, 0x80 | 116);

--- End code ---

--- Code: ---/* Set CVDD1 power supply for fuzev2 */
ascodec_write_pmu(0x17, 1, 0x80 | 47);
--- End code ---

saratoga:
All I did was comment out the voltage reduction on unboost.

Edit CPU voltage, cvdd1.

PagaN:

--- Quote from: Mihail Zenkov on February 07, 2015, 06:17:41 AM ---Latest build with all patches for clip zip: http://gdurl.com/c_OQ/download

--- End quote ---

tested this (f65baf9M-150129) firmware on my 2 year used ClipZip 4gb 100% charged,
16gb MicroSD full of mp3 files on standard sansa headphones volume (-15dB),

I get best result 18:29h and no errors! very unstable (next day I walk on street 1:30h and it freeze and give error 5-6 times) reverted on last devbuild.

rbert:

--- Quote from: saratoga on February 07, 2015, 04:22:20 PM ---All I did was comment out the voltage reduction on unboost.

Edit CPU voltage, cvdd1.

--- End quote ---
I can't set CVDD1 on unboost without crashing my fuzev2 in main menu.
But if I comment that line out, everything works fine.

I tried most voltages between

--- Code: ---ascodec_write_pmu(0x17, 1, 0x80 | 20);
--- End code ---
and

--- Code: ---ascodec_write_pmu(0x17, 1, 0x80 | 47);
--- End code ---

Mihail Zenkov:
Very strange. What clock setting you have in "system > debug >  view hw info" ?

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