mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-12-30 22:45:31 +02:00
76 lines
3.1 KiB
Plaintext
76 lines
3.1 KiB
Plaintext
=serial console=
|
|
take off the cover of PCB, then you will send the "GND" and "TXD"
|
|
and th TP74 is the "RXD", you can get serial output from those pins
|
|
you need a TTL <-> RS232 converter. here[1] is the serial PIN in the board.
|
|
|
|
=toolchain=
|
|
$ git clone git://github.com/lindnermarek/openwrt-x-burst.git[2]
|
|
$ git checkout --track -b x-burst origin/x-burst
|
|
$ make menuconfig
|
|
(select 'XBurst JZ47x0 [2.6]' in Target System
|
|
for configure the u-boot in setp: 4)
|
|
$ make
|
|
we will get toolchain under /PATH/TO/openwrt-x-burst/staging_dir/
|
|
toolchain-mipsel_gcc-4.1.2_uClibc-0.9.30.1/usr/bin
|
|
|
|
=xburst-tools (reflash tools)=
|
|
you can get source in git://github.com/xiangfu/xburst-tools.git[3]
|
|
|
|
=u-boot=
|
|
in openWRT menuconfig-->Target Images-->Build U-Boot bootloader -->
|
|
U-Boot target board (NEW) --> input 'qi_lb60'
|
|
here[4] is the u-boot github URL
|
|
|
|
=kernel(2.6.24)=
|
|
here[5] is the kernel GIT URL.
|
|
|
|
=CPU Jz4740=
|
|
Jz4740 is a multimedia application processor targeted at mobile devices
|
|
PMP. Incorporates the XBurst CPU core based on leading
|
|
micro-architecture technology, this processor provides high integration,
|
|
high performance and a low power consumption solution for embedded devices.
|
|
|
|
Boot up
|
|
The Jz4740 can be set to boot from NOR or NAND.
|
|
If booted from NAND, the CPU fetches the first page from NAND and uses the
|
|
first 4 bytes on it to know how the NAND chip should be treated (16/8-bit
|
|
bus, 2/3 row cycles). After that it copies the first 8kB from NAND and
|
|
copies it to the I-Cache for execution.
|
|
|
|
Ingenic Media Extension Instruction Set
|
|
According to the MXU User Guide, the XBurst processor supports additional
|
|
instructions called the Ingenic Media Extension Instruction Set (they
|
|
call it an SIMD instruction set).
|
|
|
|
Excerpt from the PDF:
|
|
Processors (such as the Jz4740) have 60 extra SIMD commands used for the
|
|
optimization of multimedia codecs such as MPEG4, H264, VC-1, RMVB, ...
|
|
and other multimedia decoder algorithms that can be optimized using the MXU.
|
|
|
|
Image Processing Unit
|
|
The Jz4740 also has an IPU which has the following features:
|
|
* Video frame resize
|
|
* Color space conversion: 420/444/422 YUV to RGB convert
|
|
|
|
=debian package=
|
|
1. run 'dh_make'
|
|
2. edit the file under 'debian' folder (create by 'dh_make')
|
|
3. run 'dpkg-buildpackage -rfakeroot' to create the deb package and source
|
|
package
|
|
|
|
----
|
|
[1] http://www.openmobilefree.net/?p=61
|
|
[2] here is the web site
|
|
http://github.com/lindnermarek/openwrt-x-burst/commits/x-burst
|
|
now we put the code in github.com
|
|
[3] in folder 'usbboot', here is the tar package and Debian package.
|
|
http://cloud.github.com/downloads/xiangfu/xburst-tools/xburst-tools_0.0_200906.tar.gz
|
|
http://cloud.github.com/downloads/xiangfu/xburst-tools/xburst-tools_0.0_200906-1_i386.deb
|
|
[4] http://github.com/xiangfu/qi-u-boot/tree
|
|
this git repos have two branch [master] [pi]
|
|
[master] is the v2009.06
|
|
[pi] is 1.1.6 old version.(will detele laster)
|
|
[5] git://github.com/xiangfu/qi-kernel.git
|
|
only one master branch in kernel git. so you can just
|
|
'git clone' and 'make uImage' to get the kernel image
|