Reprogramming a Dead Board¶
This procedure will allow you to reprogram the User Boot Loader (UBL) and u-Boot image on a MityDSP-L138/MityARM-1808 module via the serial port AIS bootloader (via UART1, the console port for MityDSP-L138). The AIS bootloader is entered by holding the boot-option button down while resetting (or powering up) a board installed on the Industrial I/O board.
This procedure should only be needed if a user has corrupted the base of the SPI-NOR FLASH containing the factory installed user-boot-loader and boot image.
This procedure should not be used if a user can boot to the u-Boot prompt.
This procedure does not restore kernel/FPGA or root filesystem/NAND data.
Requirements:- industrial I/O board or host board with capability to pull ext-boot pin option low.
- PC running Windows XP/Vista with a serial port
Procedure:
- extract the files in the attached zip file to a directory on your PC
- Connect the PC serial port to the console port of the MityDSP-L138 host board.
- Start a command line on the PC with Start-->Run "cmd"
- change directories to the location of the files extracted from the zip file
- Run the command:
c:\yourlocation> sfh_OMAP-L138 -flash -v -p COMx UBL_SPI_MEM.ais u-boot.bin
In the command, COMx should be replaced with the proper COM port number (e.g., COM1, COM3, etc.) of the serial port attached to the MityDSP-L138 host board. - While holding the 'boot me' button, apply power or reset the MityDSP-L138 host board. If successful, you should see text on the console similar to:
(AIS Parse): BOOTME received! (AIS Parse): Performing Start-Word Sync... (AIS Parse): Performing Ping Opcode Sync... (AIS Parse): Processing command 0: 0x58535901. (AIS Parse): Performing Opcode Sync... (AIS Parse): Loading section... (AIS Parse): Loaded 8484-Byte section to address 0x80000000. (AIS Parse): Processing command 1: 0x58535901. (AIS Parse): Performing Opcode Sync... (AIS Parse): Loading section... (AIS Parse): Loaded 716-Byte section to address 0x80002124. (AIS Parse): Processing command 2: 0x58535906. (AIS Parse): Performing Opcode Sync... (AIS Parse): Performing jump and close... (AIS Parse): AIS complete. Jump to address 0x80000000. (AIS Parse): Waiting for DONE... (AIS Parse): Boot completed successfully
At this point, the user-boot-loader and the u-Boot image should be reprogrammed into the SPI-NOR flash. You should be able to launch your terminal program and reset the host board and see the u-Boot prompt as expected.
If you get a message:
*** Warning - bad CRC, using default environment
in the u-Boot startup, then the u-Boot environment has been reset. You will need to restore any environment settings you had added to your system, and the save the environment using "saveenv".
If you get a message
Error - Checksum on MityDSP-L138 Config Block Checksum Invalid. You must set the config to FLASH to make permanent
in the u-Boot startup, then the OMAP peripheral configuration block (which selects which emac interface to use, ports to configure, etc.) must be reset and saved. For the industrial I/O board, the default settings should be OK. You can apply the settings be running (and just hitting return for all the prompts):
U-Boot > config set Ethernet Config : 2 [default] UART - 0 Configuration --- Enable UART : 0 [default] UART - 1 Configuration --- Enable UART : 1 [default] Baud : 115200 [default] HW Flow Control : 0 [default] Is Console : 1 [default] UART - 2 Configuration --- Enable UART : 0 [default] SPI - 0 Configuration --- Enable SPI : 0 [default] SPI - 1 Configuration --- Enable SPI : 1 [default] CLK is Output : 1 [default] Chip Select [0] Enable : 01 [default] Chip Select [1] Enable : 00 [default] Chip Select [2] Enable : 00 [default] Chip Select [3] Enable : 00 [default] Chip Select [4] Enable : 00 [default] Chip Select [5] Enable : 00 [default] Chip Select [6] Enable : 00 [default] Chip Select [7] Enable : 00 [default] ENA ENable : 0 [default] CLK Rate : 30000000 [default] LCD Configuration [default] LCD Enable : 0 [default] U-Boot > config save Configuration Saved
Finally, to get the board to boot off of flash:
run flashbootargs
Note: Serial flash programming utilities can be found in the MDK ( see http://support.criticallink.com/redmine/projects/arm9-platforms/files )
