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The YP-CP3 uses Wolfson WM8750. Headphones are wired on OUT2 and a headphone amplifier enabled by GPIO F2, active high - all RE from the original firmware. The original firmware runs the codec as I2S master in its 12 MHz "USB mode", fed a fixed 12 MHz MCLK, which puts 44.1 kHz at 44.118. Rockbox instead makes the rk27xx the master and clocks the codec from the codec PLL at exactly 256 fs (CODEC_SLAVE, as every other rk27xx target with an external codec), so the codec's CLOCKING register is its normal-mode 256 fs setting at every rate. 96 kHz is left out: the WM8750 cannot take it at 256 fs. - config: HAVE_WM8750, CODEC_SLAVE, rates 8-48 kHz; the WM8750 has hardware tone controls, so HAVE_SW_TONE_CONTROLS goes - ypcp3/wmcodec-ypcp3.c: register writes over the rk27xx I2C driver - wm8751.c: on the YP-CP3, power on and drive OUT2 instead of OUT1, set the volume there, and switch the amplifier with the outputs - english.lang: the YP-CP3 gets the bass/treble cutoff settings the WM8750 brings Tested on a YP-CP3: playback at 44.1 and 48 kHz on headphones, pitch and volume correct. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Change-Id: I870038fb6a21a9c26b025e3df7c220fd925f49f6 |
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| apps | ||
| backdrops | ||
| bootloader | ||
| docs | ||
| firmware | ||
| fonts | ||
| icons | ||
| lib | ||
| manual | ||
| packaging | ||
| tools | ||
| uisimulator | ||
| utils | ||
| wps | ||
| .gitattributes | ||
| .gitignore | ||
| .gitreview | ||
__________ __ ___.
Open \______ \ ____ ____ | | _\_ |__ _______ ___
Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
\/ \/ \/ \/ \/
Build Your Own Rockbox
1. Clone 'rockbox' from git (or extract a downloaded archive).
$ git clone git://git.rockbox.org/rockbox
or
$ tar xJf rockbox.tar.xz
2. Create a build directory, preferably in the same directory as the firmware/
and apps/ directories. This is where all generated files will be written.
$ cd rockbox
$ mkdir build
$ cd build
3. Make sure you have mips/m68k/arm-elf-gcc and siblings in the PATH. Make sure
that you have 'perl' in your PATH too. Your gcc cross compiler needs to be
a particular version depending on what player you are compiling for. These
can be generated using the rockboxdev.sh script in the /tools/ folder of the
source.
$ which arm-elf-eabi-gcc
$ which perl
4. In your build directory, run the 'tools/configure' script and enter what
target you want to build for and if you want a debug version or not (and a
few more questions). It'll prompt you. The debug version is for making a
gdb version out of it. It is only useful if you run gdb towards your target
Archos.
$ ../tools/configure
5. *ploink*. Now you have got a Makefile generated for you.
6. Run 'make' and soon the necessary pieces from the firmware and the apps
directories have been compiled, linked and scrambled for you.
$ make
$ make zip
7. unzip the rockbox.zip on your music player, reboot it and
*smile*.
If you want to build for more than one target, just create several build
directories and create a setup for each target:
$ mkdir build-fuzeplus
$ cd build-fuzeplus
$ ../tools/configure
$ mkdir build-xduoox3
$ cd build-xduoox3
$ ../tools/configure
Questions anyone? Ask on the mailing list or on IRC. We'll be happy to help you!