iBasso DX50

[ii]

The old topic is closed, so have to start this new one, with some new details.
iBasso DX50 is android-based, but is not nearly capable of running the android port of rockbox.
This because the original firmware has nothing for java code support; instead, the player software is fully written in C/C++ with android ndk.
It's easy to modify the firmware contents; enable adb; run custom code and access internal devices.

Current status:
 - almost done
 - sound (including spdif), screen, touchscreen, buttons, headphones detection, filesystem, battery readout, volume control, backlight control, poweroff/reboot working
 - dual boot scheme working, with swapping both player and vold
 
 
TODO:
 - install process for users
 - capture power button longpress for turnoff (how?)
 - settings save
 - screen turnoff
 - better keymap, e.g. in equalizer
 - hires audio (?)
 - prepare code branch for merging back into master

Sources + downloads: https://bitbucket.org/isergachev/rockbox/wiki/Home
Possible developers / advanced users are welcome.

[ii]

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[wodz]

I can't wrap my head around this - android without dalvik. That would be pure linux then.

[saratoga]

I can't wrap my head around this - android without dalvik. That would be pure linux then.

Perhaps they took a SOC that had Android support and simply targeted the Linux parts rather than Dalvik?  Certainly a strange result, but I guess nowadays android is replacing traditional embedded linux so maybe thats all the SOC came with. 

Edit:  Renamed title since we certainly won't be deleting this thread.

[Songs0fFailure]

saratoga,
mb not enough ram ? DX50 based on Rockchip RK2926, DX100 - RK2918.

RK2926/RK2928 is updated from RK2918, and they are changed in the old architecture of previous generation products, using the new Cortex-A9 architecture

btw, for hi-end HiFiMan HM901(Ingenic JZ4760B) used Android too. for mips! freaky! FiiO X5\X3 based on JZ4760 used µC/OS-II.

[ii]

saratoga,
mb not enough ram ? DX50 based on Rockchip RK2926, DX100 - RK2918.

RK2926/RK2928 is updated from RK2918, and they are changed in the old architecture of previous generation products, using the new Cortex-A9 architecture

btw, for hi-end HiFiMan HM901(Ingenic JZ4760B) used Android too. for mips! freaky! FiiO X5\X3 based on JZ4760 used µC/OS-II.

root@android:/ # cat /proc/meminfo
MemTotal:         408348 kB
MemFree:          375400 kB

[Wardormeur]

#sage
I have been stuck at activating adb, i played with every damn parameters of the configs file to get no results. Will your git include the whole image or just the RB sources?

[ii]

Right now I'm only working on rockbox inself.
Of course we will need to develop some kind of installer later.

Enabling adb is as easy as
setprop persist.sys.usb.config adb
setprop persist.usb.debug 1
; see /bin/openadb in stock firmware.

You can get an adb-enabled image of 1.2.8 at https://mega.co.nz/#!Ih5QTJzI!0DXEqNgJBWeK1QFqTeOhXW5KaH6LP4Vi0M38Wtd2PZM

[wodz]

I looked at your repo and this port looks much more like other hosted linux ports then android. Anyway nice to see progress. I strongly recommend to pop-up on IRC.

[ii]

I looked at your repo and this port looks much more like other hosted linux ports then android. Anyway nice to see progress. I strongly recommend to pop-up on IRC.

Sure! It's a linux. But android config of rockbox uses ndk, that's why I've chosen it.
Someone will have to explain me later what is the proper way for integrating this port into the build system.
Ok, going to IRC.

[Wardormeur]

Right now I'm only working on rockbox inself.
Of course we will need to develop some kind of installer later.

Enabling adb is as easy as
setprop persist.sys.usb.config adb
setprop persist.usb.debug 1
; see /bin/openadb in stock firmware.

You can get an adb-enabled image of 1.2.8 at https://mega.co.nz/#!Ih5QTJzI!0DXEqNgJBWeK1QFqTeOhXW5KaH6LP4Vi0M38Wtd2PZM

Duh. Thanks for both.
I love the trick to boot on rockbox with the ln -s
I'll try to lend you a hand, even though im not a RB core dev

Edit : let's start with ? : http://www.rockbox.org/wiki/PortingHowTo
Edit2 : by installing directly through adb, the backup system will reinstall the backup image booting on mangoplayer, right?

[ii]

I love the trick to boot on rockbox with the ln -s
I'll try to lend you a hand, even though im not a RB core dev

Edit : let's start with ? : http://www.rockbox.org/wiki/PortingHowTo
Edit2 : by installing directly through adb, the backup system will reinstall the backup image booting on mangoplayer, right?

Actually I've done a simple launcher, which captures keypresses, manages symlinks and allows switching players.
The launcher replaces MangoPlayer at /system/bin. I'll share its source.

Do you mean that you want to write proper config for building for dx50 separately from android? That would be great!

[Wardormeur]

Actually I've done a simple launcher, which captures keypresses, manages symlinks and allows switching players.
The launcher replaces MangoPlayer at /system/bin. I'll share its source.

So you actually can "double boot" somehow, nice !

Do you mean that you want to write proper config for building for dx50 separately from android? That would be great!

I dont really get your point. If i am right, you're actually using the android RB port, however going through the "original" port of RB would require cross compiling. It's doable, but it's a choice to make at the beginning of the project, since both ports are quite different to my knowledge.

[ii]

So you actually can "double boot" somehow, nice !

I dont really get your point. If i am right, you're actually using the android RB port, however going through the "original" port of RB would require cross compiling. It's doable, but it's a choice to make at the beginning of the project, since both ports are quite different to my knowledge.

Yes, dualboot.
I mean, soon or late we have to split from android port and create another config entry in tools/configure + separate folders, sources etc.
Android port does not need the modifications I've made to it

[saratoga]

I saw a comment about the SOC not having a real time clock that persisted between runs.  That is very strange.  Which SOC is the DX50 using?