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Disabling double buffering results in expected CPPI TX behaviour. With the double buffering enabled, sending single ZLP resulted in two ZLPs being available. The two ZLPs is problematic because this causes Windows to reset USB device after failed SCSI command. The problematic sequence on Windows 10 was as follows: * Host sends SCSI Mode Sense(6) Informational Exceptions Control(0x1C) * Device sends ZLP * Device sends command failed response With endpoint double buffering enabled the ZLP was read twice by host. As host was expecting command response on the second read (and got ZLP instead), host attempts recovery by resetting USB device and retrying. Change-Id: I64e95998f429ffb7b14143d956b1f29d20218d14 |
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__________ __ ___. 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.bz2 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!