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Aidan MacDonald 5c1ae51193 echoplayer: implement audio playback
Playback is implemented using a target-specific PCM layer,
using the STM32H7 SAI & DMA registers directly. There are
a number of pop/click issues:

1. Slight click when powering up the amplifiers
2. Click when starting and stopping playback
3. Popping when changing playback frequency
4. Popping when shutting down

It should be possible to eliminate or at least mitigate
(2) to (4) in software, but (1) happens as a result of
powering on the amplifiers while everything is muted so
might be unavoidable.

Change-Id: I398b66596176fb2341beb7deba7bf6f4f3fb82b3
2026-03-03 09:23:23 -05:00
android build: instead of 'ifdef NODEPS' use 'ifneq ($NODEPS,)' 2025-03-29 14:33:20 -04:00
apps Update Bulgarian translation 2026-03-03 14:20:49 +02:00
backdrops Rockbox for the HiBy R3 Pro II/R1 2025-12-27 15:44:54 -05:00
bootloader mrobe500: Allow bootloader build without HAVE_BOOTLOADER_USB_MODE 2026-02-07 10:48:22 -05:00
docs pcm: introduce pcm_sink 2026-03-02 10:09:11 +09:00
firmware echoplayer: implement audio playback 2026-03-03 09:23:23 -05:00
fonts FS#9060: Add the WinQangYi-Song BOLD fonts in 9, 10, 11, and 12pt. 2025-11-19 08:33:07 -05:00
icons Revert Non-Alpha Updated 8x8 tango icons 2020-10-25 16:21:58 +00:00
lib utf8proc: Add utf8proc for normalizing UTF-8 strings 2026-03-01 08:26:00 -05:00
manual added setting to retain file browser directory on reboots WIP 2026-03-01 15:05:09 -05:00
packaging rgnano: rbutil support and manual updates 2026-01-03 20:03:12 -05:00
tools updatelang: Update validation check for LANG_VOICED_DATE_FORMAT 2026-03-01 16:42:32 -05:00
uisimulator Remove Creative Zen Vision and Vision:M ports 2026-02-06 07:31:54 -05:00
utils Add Shanling M0 Pro to jztool 2026-02-24 18:03:33 -05:00
wps Rockbox for the HiBy R3 Pro II/R1 2025-12-27 15:44:54 -05:00
.gitattributes
.gitignore tools: add RegGen utility 2025-12-29 18:51:56 -05:00
.gitreview misc: Add a .gitreview file for better gerrit integration 2021-06-24 07:22:19 -04:00

               __________               __   ___.
     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!