7.4 Programming the IMX processor
Apply power to the LMU-5541™, then view the terminal emulation screen.
Enter <B> to break the u-boot.
Net: FEC [PRIME]
Normal Boot
Hit 'B' to stop autoboot: 0
LMU5530-Boot >
The command prompt “LMU-5541-Boot >” will appear.
Type: nand erase.chip <enter>
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LMU5530-Boot > nand erase.chip
When completed, “LMU5530-Boot >” will appear.
NAND erase.chip: device 0 whole chip
Erasing at 0x1ffe0000 -- 100% complete.
OK
LMU5530-Boot >
7.5 USB driver installation
If the USB driver has been previously installed, skip the USB driver installation.
Power cycle the unit.
If the USB driver has never been installed, a pop-up window will appear → Driver Software Installation. Proceed with the driver install.
Upon completion, it will indicate USB Input Device Installed.
7.6 Firmware update
Remove power from the LMU-5541™
Remove the top cover of the LMU-5541™
Connect the 4-pin connector of 5C940 into the 4-pin header located on the board at J25. The red stripe of 5C940 is placed facing towards the
closest edge of the board.
Connect the 5-pin connector of the serial adaptor cable 5C940 to the 5-pin connector of the serial cable 134364-SER.
Connect the DB-9 connector of 134364-SER to the serial port or serial adaptor connected to the maintenance computer.
Power up the LMU-5541™
Launch the TFTP32 or TFTP64 server.
For the Current Directory window, Browse for Directory C:\tftpboot
For the Server interface window, select 192.168.1.189
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On the maintenance computer, open the command prompt by searching for CMD.EXE followed by <enter>
Type: cd c:\tftpboot
At the prompt c:\tftpboot, type: dir <enter> (to see and verify the files)
At the prompt c:\tftpboot, type: sb_loader.exe -f u-boot-lmu5530-btstrp.imx <enter>
In the command prompt screen, wait for an indication of a successful download.
Looking at the Terminal Emulation screen, you will see up to 9 files being serially loaded. Wait until all the files have been loaded as it takes
several minutes. After all files are loaded “U-boot Upgrade complete” will appear
on the terminal emulation screen.
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7.7 Programming the co-processor
WinSCP will be used to transfer the firmware for the co-processor into the Linux system after it is running.
Launch WinSCP
Select File Protocol: SCP
Enter Host Name: 192.168.1.55
Enter Port Number: 2001
Enter Username: root
Enter Password: wireless3g
Click on Login
A new WinSCP screen will appear. On the left side, browse for C:\tftpboot
The right half should be pointed to the /root directory in the LMU-5541.
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Transfer the file called LMU7030-CoProc_vX.X.bin via SCP over to root. Drag the file LMU7030-vX.X.bin across the screen to the root side.
On the Terminal Emulation screen, press <Enter> to bring up the LMU5530 login:
Username: root
Password: wireless3g
Type: ls <Enter> (to view the name of the bin file)
Type: lmu5530_program_stm8.sh /root/<file_name.bin> <Enter>
Note: the bin file name is case sensitive and must be entered exactly as shown.
The co-processor, STM8, is being programmed.
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Programming is complete when “success” is returned and the “root@LMU5530:~#” prompt is displayed.
To view co-processor info type: stm_cli --info
7.8 Final Steps
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