Lg: #īefore the new firmware image could now be copied the destination flash the destination flash first needed to be erased. db12x> tftpboot 0x81000000 factory-to-ddwrt.bin Upon completion the message “done” appeared and the number of bytes transferred was shown. The new firmware then begun transferring. I then ran “tftpboot” again with required load address and source firmware parameters. I then ran TFTPD32, browsed for the folder containing the firmware images and set the server address to “192.168.1.100”.
/linksys_firmware_update-56dcdc915f9b5854a9f5f6ce.png "dd wrt download tftp")
With the router connected directly via an ethernet cable and all wireless adaptors disabled I set the network adaptor to the static IP address “192.168.1.100”. Warning: no boot file name using '6F01A8C0.img' I then exited tftpboot by pressing Ctrl+C. I then made a note of the expected server address “192.168.1.100” and load address “0x81000000”. Once the prompt appeared I ran “tftpboot”. To do this, within putty after power cycling, simply wait for the message “Autobooting in 1 second” to appear begin typing “tpl” and pressing enter until the sequence stops and the prompt “db12x>” appears. The next step was to break execution of the boot loader in order to run tftpboot. I downloaded the DD-WRT firmware image files from here and then downloaded and installed the client side TFTP server program TFTPD32 from here. The first step was to download the required firmware images and other supporting software. So it is possible to transfer the firmware image via TFTP and re-flash it. After some reading around on the subject (being a complete Linux novice) I discovered the boot loader supports network transfer via the Trivial File Transfer Protocol (TFTP). The obvious next step then was to try re-flashing it. So it appears the firmware may have become corrupted. SQUASHFS error: Unable to read page, block c523, size dd54 SQUASHFS error: lzma returned unexpected result 0x1
DD WRT DOWNLOAD TFTP SERIAL
Additional serial output follows before we encounter a raft of file system page read errors before stopping. Firstly by uncompressing the kernel image and then starting it. After initialisation the boot loader attempts to auto boot the image at address 0x9F020000. The output shows the boot loader initialising the serial port. Using puTTY I managed to capture the routers output during power up. The connection settings according to the OpenWRT Wiki page are 115200 8N1 with no flow control. I soldered in a pin header to the board and connected my USB to serial converter. The four pins comprising the two supply lines and the TX and RX lines. There are two unpopulated headers one 14 pin, which I assume must be the JTAG connection, and one 4 pin which turns out to be the serial connection. With nothing to lose I begun disassembling the router to see if I could get access to this serial port and maybe diagnose the problem. After removing the aerials and the screws holding the case together I had the router disassembled. It’s also the boot loaders responsibility for configuring the serial interface.
DD WRT DOWNLOAD TFTP MAC
The flash memory is made up of the boot loader (U-Boot), the operating firmware and the ART (which contains MAC addresses and calibration data for the wifi). It also has both a JTAG and serial programming/debug connection. Apparently the WDR4300 has an Atheros AR9344 SOC running at 560 MHz with 8MB of flash and 128 MB DRAM. Once such resource I found extremely useful was the OpenWRT Wiki page. Luckily there is a ton of resources out there surrounding these routers. I tried the recommended 30/30/30 reset procedure which didn’t solve the issue. The original firmware was replaced with DD WRT, a great Linux alternative firmware, so the first thing I did was head over to the DD WRT homepage for help. And to make things worse now it wont even boot. I’ve tried power cycling in the vain hope a reboot may fix the issue. It has been behaving rather strange for the past few days. My new wireless router decided to stop working at the weekend.
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