CM-T3530: U-Boot: Firmware Update

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Admolition warning.png Failure in CM-T3530 firmware update may prevent proper boot from on-board NAND flash. It is recommended to create a bootable MMC/SD card before updating CM-T3530 firmware

Preliminary setup

  • Make sure to power off the CM-T3530 evaluation platform
  • Connect the host PC to the SB-T35 base-board (connector P12) via the serial cable supplied with the evaluation kit.
  • Start terminal emulation software on your PC. Set baud rate to 115200 bps, 8 bit per frame, 1 stop bit, no parity, no flow control.
  • Turn on the CM-T3530 evaluation system. The U-Boot boot-loader will start and you will get a command prompt.
Admolition note.png If the boot settings of your CM-T3530 are different than default, you may need to press and hold ^C while turning the CM-T3530 on, in order to get command prompt.

CM-T3530 firmware can be updated from an MMC/SD card or using network TFTP download. Both methods are performed from the U-Boot command line.

CM-T3530 Firmware consists of two components: X-Loader and U-Boot. The U-Boot bootloader can be installed and updated independently without updating the existing X-Loader. Please continue to CM-T3530 U-Boot Update for U-Boot installation instructions.

CM-T3530 X-Loader Update

Admolition warning.png X-Loader can be installed only to completely erased NAND flash! The procedure below erases the entire NAND flash!

MMC/SD card

  • Copy x-load.bin.ift from U-Boot package for CM-T3530 to the root directory of the MMC/SD card.
  • Insert the MMC/SD card into the SD socket (P13) on SB-T35.
  • Start the U-Boot MMC subsystem and check that your storage device is ready and contains the X-Loader binary
CM-T35 # mmc init
CM-T35 # fatls mmc 0
  • Load the X-Loader into memory
CM-T35 # fatload mmc 0 80a00000 x-load.bin.ift

TFTP download

  • Setup TFTP server
  • Put the X-Loader binary in the root directory of TFTP service
  • Setup U-Boot networking:
CM-T35 # dhcp
for dynamic IP configuration, or
CM-T35 # setenv ipaddr <ip address>
CM-T35 # setenv serverip <server ip>
for static IP configuration
CM-T35 # dhcp
for dynamic IP configuration
  • Download the X-Loader to the CM-T3530 RAM
CM-T35 # tftp 80a00000 x-load.bin.ift

Flashing X-Loader

Admolition warning.png Do not reset or power off the CM-T3530 during the update process! Doing so may result in nand flash corruption!
  • Flash the X-Loader onto the on-board NAND flash:
CM-T35 # nandecc hw
CM-T35 # nand erase
CM-T35 # nand scrub
CM-T35 # nand write 80a00000 0 10000


Admolition important.png It is essential to install U-Boot immediately after X-Loader update

CM-T3530 U-Boot Update

MMC/SD card

  • Copy u-boot.bin from U-Boot package for CM-T3530 to the root directory of the MMC/SD card.
  • Insert the MMC/SD card into the SD socket (P13) on SB-T35.
  • Start the U-Boot MMC subsystem and check that your storage device is ready and contains the U-Boot binary
CM-T35 # mmc init
CM-T35 # fatls mmc 0
  • Load the U-Boot into the CM-T3530 RAM
CM-T35 # fatload mmc 0 80a00000 u-boot.bin

TFTP download

  • Setup TFTP server
  • Put the U-Boot binary in the root directory of TFTP service
  • Setup U-Boot networking:
CM-T35 # dhcp
for dynamic IP configuration, or
CM-T35 # setenv ipaddr <ip address>
CM-T35 # setenv serverip <server ip>
for static IP configuration
  • Download the U-Boot to the CM-T3530 RAM
CM-T35 # tftp 80a00000 u-boot.bin

Flashing U-Boot

Admolition warning.png Do not reset or power off the CM-T3530 during the update process! Doing so may result in nand flash corruption!
  • Flash the U-Boot onto the on-board NAND flash:
CM-T35 # nandecc sw
CM-T35 # nand erase 80000 40000
CM-T35 # nand write 80a00000 80000 40000
  • Reset the CM-T3530 evaluation platform

See also

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