The NGW100 Network Gateway Kit is a development board for the AT32AP7000 microcontroller, a member of the AVR32 family. The NGW100 has two Ethernet ports, a SD/MMC card reader, and connectors for USB (device mode only), serial console, and JTAG.
|Version/Model||S/N||OpenWrt Version Supported||Model Specific Notes|
|-||N/A||7.09||See oldwiki documentation|
|-||N/A||8.09.1||Issues installing Squashfs. Alternate method described here|
The following description assumes that you have
- a working TFTP server
- a build environment (you will have to build parts of OpenWRT yourself)
- a serial cable to connect the serial port
Since 8.09, the gzip compressed kernel is by far too large: it is about 3MB, and the flash section dedicated to it (0x20000 - 0x120000) is only 1MB.
Therefore, the lzma compressed kernel must be used for OpenWRT 8.09. Unfortunately, the preinstalled U-Boot does not support lzma compression (at least not on my board, which I bought around December 2008).
A version of U-Boot patched for lzma support can be built together with OpenWRT: in
make menuconfig, choose
Build U-Boot bootloader in the section
Target Images. While you are at it, check also the entry
jffs2 (see below). Save the configuraton and
make. This should now build U-Boot along with OpenWRT.
U-Boot can then be installed with FlashUpgrade as follows: Download the Source Code of the FlashUpgrade tool (the pre-built binaries don't include the lzma patch).
git clone git://www.atmel.no/~hcegtvedt/flash-upgrade.git flash-upgrade
bin/u-boot-atngw100.bin from your OpenWRT tree into the unpacked source directory. Rename the copy to u-boot.bin. Make and install following the instructions from FlashUpgrade.
You should now have U-Boot 1.3.3 with lzma support.
Besides the boot loader, you need two more items in the flash
- the compressed Linux image (
- the root file system (
On the NGW100, you need to flash them separately. The jffs filesystem
openwrt-avr32-jffs2-64k.img is not available for download from http://downloads.openwrt.org/kamikaze/8.09.1/avr32/, so you will have to build it yourself. If you have not yet done so, go back to menuconfig, open the entry "Target Images". Make sure "jffs2" is selected. Save the confguration and make. Copy
openwrt-avr32-jffs2-64k.img to your TFTP server.
In Uboot: (bold means that this is something you have to enter, italic means that you have to put your actual value here)
Before we can flash anything, first erase the flash:
Uboot> erase 20000 7effff
Erased 125 sectors
Flashing is a two step process
- first load the file to RAM via TFTP
- then copy the loaded contents to the flash
This must be done for both the kernel and the root file system.
Give your board an IP address
Uboot> set ipaddr someaddressinyournet
Load the kernel into RAM at address 0x10000000:
Uboot> tftpboot 0x10000000 yourTftpServerAddress:openwrt-avr32-uImage-lzma
note the message:
Bytes transferred = 659998 (a121e hex)
The length in hex must be included in the next command
Copy to flash:
Uboot> cp.b 10000000 20000 a121e replace a121e with the number of bytes transferred above!
You can check whether U-Boot agrees with you:
should give something like:
Legacy Image at 00020000: Image Name: OpenWrt Linux-126.96.36.199 Image Type: AVR32 Linux Kernel Image (lzma compressed) Data Size: 659934 Bytes = 644.5 kB Load Address: 10000000 Entry Point: 90000000 Verifying Checksum ... OKVerify that the image type is "lzma compressed" and the data size is less than 1MB.
Now load the root file system into RAM at address 0x10000000:
Uboot> tftpboot 0x10000000 yourTftpServerAddress:openwrt-avr32-jffs2-64k.img
note the message:
Bytes transferred = 4390912 (430000 hex)
Copy to flash:
Uboot> cp.b 10000000 120000 430000 replace 430000 with the number of bytes transferred above!
Uboot> set bootargs console=ttyS0,115200 root=/dev/mtdblock2 rootfstype=jffs2 init=/etc/preinit
Uboot> set bootcmd bootm 0x20000
You may now boot the board.
On the first boot (and only then), you will see messages like these:
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 0x3000 id jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000004: 0x0061 id jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000000c: 0xe3b2 id jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010: 0x3001 id Empty flash at 0x000115fc ends at 0x00011600(Many more messages like these)
I don't know whether this is a bug or a feature
You should finally see:
jffs2_scan_eraseblock(): End of filesystem marker found at 0x420000 jffs2_build_filesystem(): unlocking the mtd device... done. jffs2_build_filesystem(): erasing all blocks after the end marker... done. VFS: Mounted root (jffs2 filesystem).
You should now have a working OpenWRT on AVR32
BusyBox v1.11.2 (2009-09-04 18:20:59 CEST) built-in shell (ash) Enter 'help' for a list of built-in commands. _______ ________ __ | |.-----.-----.-----.| | | |.----.| |_ | - || _ | -__| || | | || _|| _| |_______|| __|_____|__|__||________||__| |____| |__| W I R E L E S S F R E E D O M KAMIKAZE (8.09.1, unknown) ---------------------------- * 10 oz Vodka Shake well with ice and strain * 10 oz Triple sec mixture into 10 shot glasses. * 10 oz lime juice Salute! --------------------------------------------------- root@OpenWrt:/# df Filesystem 1k-blocks Used Available Use% Mounted on rootfs 6976 1468 5508 21% / /dev/root 6976 1468 5508 21% / tmpfs 15584 28 15556 0% /tmp tmpfs 512 0 512 0% /dev root@OpenWrt:/#
|CPU Speed: 210 Mhz|
|Flash-Chip: AT49BV642D-70TU + AT45DB642D|
|Flash size: 8 MB parallel + 8 MB serial|
|RAM: 32 MB|
|USB: Yes (device)|
See here for a photo.
Note: The expansion headers are not present on the board, but it is possible to add them.
Since this part is identical for all devices, see Basic configuration.
To connect stuff to the USB port, please see Connect stuff to the USB port.
toh/atmel/atngw100.txt · Last modified: 2013/11/07 23:18 by kaklik