Rockbox General > Rockbox General Discussion

Rockboxed Sansa M240V4..Issues but seems close..

<< < (2/3) > >>

saratoga:
The m200 uses a AA battery, while the clip uses a 3.7v lipoly battery.  The voltage regulators need different settings.  Presumably whatever settings we're using for the m200 are insufficient to power the headphone amp at full volume.

funman:
Can you give a try to this patch http://pastie.org/1026749 ?

I am not sure if the second part is effective, but perhaps the 1st part should solve the quiet audio problem.

saratoga:
Whats the reasoning behind this:


--- Code: ---+#if (CONFIG_CPU == AS3525 && !defined(SANSA_M200V4))
...

--- End code ---

I think if the regulators are setup right they should provide more then enough current to drive the headphones the same as on the other AMS devices.  The problem is probably just that we're running them out of spec now, so when the amp tries to output too high a voltage it sags the CPU voltage too low and the system powers down.

saratoga:

--- Quote from: cpnfantstk on June 30, 2010, 10:29:50 PM ---The volume level I can reach is -8db without the unit shutting down and yes Saratoga always at the same level.

--- End quote ---

Just wondering, is this with a 1.5v (alkaline) or a 1.2v  (NiMH) battery?

funman:

--- Quote from: saratoga on July 01, 2010, 11:34:38 AM ---Whats the reasoning behind this:


--- Code: ---+#if (CONFIG_CPU == AS3525 && !defined(SANSA_M200V4))
...

--- End code ---

--- End quote ---

I just spotted that this bit differs between clipv1 and m200v4 at OF init but perhaps it's changed in further code

Navigation

[0] Message Index

[#] Next page

[*] Previous page