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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= =serial console=
take off the cover of PCB, then you will send the "GND" and "TXD" at the back of Ben Nanonote, there is "GND", "TXD" and "RXD",
and th TP74 is the "RXD", you can get serial output from those pins you can get serial output from those pins
you need a TTL <-> RS232 converter. here[1] is the serial PIN in the board. you need a TTL <-> RS232 converter. because the Ben Nanonote serial
console is TTL. here[1] is the serial PIN in the board.
=toolchain= =toolchain=
$ git clone git://github.com/lindnermarek/openwrt-x-burst.git[2] $ git clone git://github.com/lindnermarek/openwrt-x-burst.git[2]
$ git checkout --track -b x-burst origin/x-burst $ git checkout --track -b x-burst origin/x-burst
$ make menuconfig $ make menuconfig
(select 'XBurst JZ47x0 [2.6]' in Target System (select 'XBurst JZ47x0 [2.6]' in 'Target System')
for configure the u-boot in setp: 4)
$ make $ 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 toolchain-mipsel_gcc-4.1.2_uClibc-0.9.30.1/usr/bin
=xburst-tools (reflash tools)= =xburst-tools (usbboot tools)=
you can get source in git://github.com/xiangfu/xburst-tools.git[3] 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= =u-boot=
in openWRT menuconfig-->Target Images-->Build U-Boot bootloader --> in openWRT menuconfig-->Target Images-->Build U-Boot bootloader -->
U-Boot target board (NEW) --> input 'qi_lb60' U-Boot target board (NEW) --> input 'qi_lb60
here[4] is the u-boot github URL
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)= =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 How To Reflash
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 1. plug the Ben to your computer. direct connect. no usb hub.
first 4 bytes on it to know how the NAND chip should be treated (16/8-bit 2. short the two pin ('boot from usb' show in [1])
bus, 2/3 row cycles). After that it copies the first 8kB from NAND and 3. press 'RESET' at the back of Ben
copies it to the I-Cache for execution. 4. in you computer run [6] and [7]. then you flashed the bootloader and kernel
to nand flash.
Ingenic Media Extension Instruction Set 5. rootfs: format your SD card.
According to the MXU User Guide, the XBurst processor supports additional the first partition must VFAT and others is EXT2.
instructions called the Ingenic Media Extension Instruction Set (they we can put the kernel(uImage) in the first partition. put the rootfs in second partition.
call it an SIMD instruction set). download the rootfs [8], uncompress it to second partition of SD card
6. now you can boot your Ben.
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 [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.tar.gz
http://cloud.github.com/downloads/xiangfu/xburst-tools/xburst-tools_0.0_200906-1_i386.deb 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 [4] http://github.com/xiangfu/qi-u-boot/tree
this git repos have two branch [master] [pi] [master] is the last u-boot.
[master] is the v2009.06 command: "mmc init;fatload mmc 0 0x80600000 uImage;bootm" is for boot the kernel in sd card.
[pi] is 1.1.6 old version.(will detele laster)
[5] git://github.com/xiangfu/qi-kernel.git [5] git://github.com/xiangfu/qi-kernel.git
only one master branch in kernel git. so you can just 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