====== Advanced firmware upload options ======

===== Manual U-boot TFTP flashing =====

**These instructions are for Rambutan board**

  * You will need TFTP server running on your PC. On Linux install package 'tftpd-hpa', on Windows - [[http://tftpd32.jounin.net/|TFTPD32]].

  * Put sysupgrade image to your TFTP folder.

  * Reboot or power up Rambutan with serial console running and connected to PC.

  U-Boot 2016.01-00029-gbcf8fc0 (May 31 2016 - 16:06:17 +0300)
  
  =========================================
  Caraboot v3.1-dev (QCA9557, NAND) U-Boot
  http://www.8devices.com/
  -----------------------------------------
  DRAM:  128 MiB
  NAND:  128 MiB
  *** Warning - bad CRC, using default environment
  
  Net:   eth0, eth1
  Hit <ESC> key to stop autoboot:  0 

  * Press <ESC> to enter U-Boot console, press <Ctrl+C> few times to clear console buffer

  Hit <ESC> key to stop autoboot:  0
  ath> INTERRUPT>
  ath> <INTERRUPT>
  ath> <INTERRUPT>

  * Set IP adresses of TFTP server and device (adjust addresses to match your setup):

  setenv ipaddr 192.168.1.1; setenv serverip 192.168.1.100

  * Download firmware from TFTP server (file name can be changed if you need)

   ath> tftpboot 80060000 openwrt-8devices-v2.9-ar71xx-nand-rambutan-squashfs-nand-factory.ubi
  Using eth0 device
  TFTP from server 192.168.1.100; our IP address is 192.168.1.1
  Filename 'openwrt-8devices-v2.9-ar71xx-nand-rambutan-squashfs-nand-factory.ubi'.
  Load address: 0x80060000
  Loading: #################################################################
           #################################################################
           #################################################################
           #################################################################
           #####################################################
           5.6 MiB/s
  done
  Bytes transferred = 4587520 (460000 hex)
  ath> 

  * Next step erases old firmware and writes the new one. **Only** perform it, if previous step was successful and '''Bytes transferred =''' matches actual size of firmware image file.

  ath> nand erase.part ubi; nand write 80060000 ubi ${filesize}
  
  NAND erase.part: device 0 offset 0x600000, size 0x7a00000
  Erasing at 0x7fe0000 -- 100% complete.
  OK
  
  NAND write: device 0 offset 0x600000, size 0x460000
   4587520 bytes written: OK
  ath> 

* Flashing is done, you can reset the board

  reset