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--- hardwarerelated:mp3player:fiio_m3k [2022/11/13 12:06] – external edit 127.0.0.1
+++ hardwarerelated:mp3player:fiio_m3k [2024/03/03 11:25] (current) – chris
@@ Line 1: / Line 1: @@
+===== What is this about? =====
+Some notes on the FiiO M3K Mini HiFi.  As of July 2021, the M3k is available from amazon.com . A build of [[https://www.rockbox.org|rockbox]] for the device exists, and works just great!
+===== Links =====
+{{ :hardwarerelated:mp3player:20200215_145256_m3k_x1920.jpg?300|M3k w/ rockbox}}
+  * [[https://www.rockbox.org/wiki/ConsoleEmulators|rockbox emulators]]
+  * [[https://www.amazon.co.jp/dp/B07GPPC7BS/|M3k on Amazon Japan]]
+  * [[https://www.fiio.com/m3k|details from vendor]]
+  * [[https://blog.fluxcoil.net/posts/2021/08/rockbox-badapple-m3k/|My blog entry on the "Bad apple" port to the M3K]], [[https://github.com/christianhorn/badapple-lua|the code]], [[https://forums.rockbox.org/index.php/topic,53945.0.html|Rockbox forum]]
+===== Why rockbox? =====
+  * OpenSource pieces
+  * support for many codecs, like ogg vorbis, Amiga mod and sid files
+  * _really_ configurable: multiple bookmarks per file can be set, fading from one file into the next and much more
+  * There are plugins for playing doom, quake, duke3d
+  * [[https://download.rockbox.org/daily/manual/rockbox-sansafuzeplus/rockbox-buildch12.html#x14-34900012.4.15|A One-Time password client]]
+  * emulation
+    * gameboy/gameboy color emulator are buildin:place files with .gb or .gbc extension
+    * [[https://forums.rockbox.org/index.php?topic=51219.0|NES emulation project exists]]
+  * If you need something, you can create it!
+==== Rockbox current notes ====
+This is the native port, recommended nowadays.
+  * [[https://www.rockbox.org/wiki/FiioM3K|link to the port]]
+  * [[https://forums.rockbox.org/index.php/topic,53858.0.html|Install instructions]], echoing here:
+    * fetch jztool and bootloader.m3k
+    * create a vfat filesystem on the card, copy bootloader.m3k to the card, unzip a rockbox release to the card (.rockbox directory)
+    * Turn off the M3K, keep volume-down pressed while connecting to the Linux system, screen stays dark but lights at the touch fields light up
+    * ./jztool fiiom3k load bootloader.m3k
+    * Take a backup of the current bootloader, install the new one.  From now on, the menu can be reached by holing volume-up while powering on the M3K.
+    * Fetch a daily build for the FiiO M3K from [[https://www.rockbox.org/daily.shtml|here]], unzip it into the root-directory of your microsd-card. It creates a .rockbox directory. Careful, there seem to be also "bad builds", so by chance you hit one of these. For example, 2021-10-19 does not boot for me.
+    * Just start up the M3K, it will boot Rockbox from the directory.
+  * The fast forward/rewind issues from the non-native port are gone.
+==== Rockbox 1.4.3 notes (old, deprecated) ====
+This was the first "port", rockbox more running in userspace as alternative to the native firmware. On each start, one has to select "rockbox". The native port is recommended nowadays.
+  * [[https://forums.rockbox.org/index.php/topic,52952.0.html|forum link with details]]
+  * [[https://xvtx.ru/rockbox/download.htm|rockbox 1.4.3 firmware for the M3k]]
+  * [[https://www.fiio.com/newsinfo/82055.html|update instructions]]
+  * **usage notes for rockbox 1.4.3 on M3k**
+    * fast forward/rewind do not work in the default config, just a 'flickering' is seen. To fix this, go into "Playback Settings > Fast Forward / Rewind > FF/RW Accel" and change it to 'Very fast', then long pressing to fastforward/rewind works.
+    * press the on/off button for 2 seconds to lock the device, and again to unlock it
+    * creating bookmarks:
+      * ensure these settings are in place
+        * Menu->Settings->General->Bookmarks->On Stop->Yes
+        * Menu->Settings->General->Bookmarks->Load Last->Ask
+        * Menu->Settings->General->Bookmarks->Recent->Unique Only
+      * Then, to create a bookmark, press the 'select' button for 2 seconds, that's the lowest button on the left side.
+==== Rockbox buildenv ====
+  * https://www.rockbox.org/wiki/FiioM3K
+  * https://www.rockbox.org/wiki/HowtoWritePlugins
+  * https://www.rockbox.org/wiki/DevelopmentGuide
+  * https://www.rockbox.org/wiki/CrossCompiler
+<code>
+# Fedora34
+sudo dnf install gmp-devel git
+git clone git://git.rockbox.org/rockbox
+cd rockbox/tools
+# This should now build the crosscompiler for us
+vi rockboxdev.sh
+### I customized the path, to not build into /usr/local
+./rockboxdev.sh
+# At this point I needed to customize the PATH to point at the compiler:
+export PATH="/home/chris/Downloads/rockbox/rockboxbin/bin:$PATH"
+# Do a build
+mkdir build
+cd build
+../tools/configure
+make -j
+make zip
+# This should leave a zipfile which we can deploy as .rockbox
+# to the sdcard and start the M3K!
+cd ..
+# Do a build of the simulator
+mkdir buildsim
+cd buildsim
+../tools/configure
+make -j
+make fullinstall
+./rockboxui
+</code>
+==== Bad apple@M3K ====
+  * https://blog.fluxcoil.net/posts/2021/08/rockbox-badapple-m3k/ -- article
+  * https://github.com/christianhorn/badapple-lua -- repo
+  * https://github.com/TT-392/Pinetime-bad-apple-video-processor -- a Bad apple @pinetime project

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