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Xiangfu Liu 2009-07-19 10:30:35 +08:00
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README
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@ -1,62 +1,55 @@
Prepare for Reflash Device
--------------------
=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.
at the back of Ben Nanonote, there is "GND", "TXD" and "RXD",
you can get serial output from those pins
you need a TTL <-> RS232 converter. because the Ben Nanonote serial
console is TTL. 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)
(select 'XBurst JZ47x0 [2.6]' in 'Target System')
$ make
we will get toolchain under /PATH/TO/openwrt-x-burst/staging_dir/
then you 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]
=xburst-tools (usbboot tools)=
you can get source code at git://github.com/xiangfu/xburst-tools.git[3]
$ cd /PATH/TO/xburst-tools/usbboot
$ ./autogen.sh && ./configure && make && sudo make install
then you got the 'usbboot' command. that is for the reflash.
=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
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
$ make qi_lb60_config
$ make
there is 'u-boot-nand.bin' is for Ben
=kernel(2.6.24)=
here[5] is the kernel GIT URL.
here[5] is the kernel GIT URL. this kernel is work in Ben Nanonote.
yes. there is another kernel in openWRT(2.6.28), it's will work later :-)
$ make qi_lb60_defconfig
$ make uImage
there is 'arch/mips/boot/uImage' for Ben.
=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
How To Reflash
--------------------
1. plug the Ben to your computer. direct connect. no usb hub.
2. short the two pin ('boot from usb' show in [1])
3. press 'RESET' at the back of Ben
4. in you computer run [6] and [7]. then you flashed the bootloader and kernel
to nand flash.
5. rootfs: format your SD card.
the first partition must VFAT and others is EXT2.
we can put the kernel(uImage) in the first partition. put the rootfs in second partition.
download the rootfs [8], uncompress it to second partition of SD card
6. now you can boot your Ben.
----
[1] http://www.openmobilefree.net/?p=61
@ -67,9 +60,26 @@ http://github.com/lindnermarek/openwrt-x-burst/commits/x-burst
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)
[master] is the last u-boot.
command: "mmc init;fatload mmc 0 0x80600000 uImage;bootm" is for boot the kernel in sd card.
[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
[6] flash.u-boot.sh
--------
#!/bin/bash
U_BOOT=/PATH/TO/u-boot-nand.bin
sudo ../usbboot/src/usbboot -c "\
boot;\
nprog 0 $U_BOOT 0 0 -n"
[7] flash.kernel.sh
----------
#!/bin/bash
START_PAGE=2048
KERNEL=/PATH/TO/KERNEL_FOLDER/arch/mips/boot/uImage
sudo usbboot -c "boot"
sudo usbboot -c "nprog $START_PAGE $KERNEL 0 0 -n"
[8] http://www.openmobilefree.net/other/file/root26.tar.bz2