Hi,

    We are trying the DVFlasher_1_12 with the custom designed board with NAND 
Flash. 
The NAND flash chip we are using is a big block device.When we try to flash the 
UBL we get the following messages. 

Attempting to connect to device COM1...
Press any key to end this program at any time.

Waiting for DVEVM...
BOOTME commmand received. Returning ACK and header...
ACK command sent. Waiting for BEGIN command...
        DVEVM:    BEGIN
BEGIN commmand received. Sending CRC table...
CRC table sent.  Waiting for DONE...
DONE received.  Sending the UART UBL file...
DONE received.  UART UBL file was accepted.
UART UBL Transmitted successfully.

        DVEVM:  TI UBL Version: 1.11, Flash type: NAND
        DVEVM:  Booting PSP Boot Loader
        DVEVM:  PSPBootMode = NAND

WARNING! The DM644x is NOT in UART boot mode!
Only continue if you are sure of what you are doing.

        Continue (Y/N) ? y

Waiting for UBL on DVEVM...
UBL's BOOTPSP commmand received. Returning CMD and command...
CMD value sent.
SENDUBL received. Returning ACK and header for UBL data...
ACK command sent. Waiting for BEGIN command...
UART UBL's BEGIN commmand received. Sending the Flash UBL code...
Flash UBL code sent.  Waiting for DONE...
DONE received.  All bytes of Flash UBL code received...
DONE received.  Flash UBL S-record decoded correctly.
        DVEVM:  Initializing NAND flash...
        DVEVM:  Correct devID found
        DVEVM:  Writing UBL to NAND flash
        DVEVM:  Number of blocks needed for header and data: 0x00000001
        DVEVM:  Attempting to start in block number 0x00000001.
        DVEVM:  Unprotecting blocks 0x00000001 through 0x00000001.
        DVEVM:  Erasing blocks 0x00000001 through 0x00000001.
        DVEVM:  Writing header...
        DVEVM:  NAND ECC failure!
        DVEVM:  Starting UART Boot...
        DVEVM:  BOOTPSP

Waiting for UBL on DVEVM...
UBL's BOOTPSP commmand received. Returning CMD and command...
CMD value sent.
SENDUBL received. Returning ACK and header for UBL data...
ACK command sent. Waiting for BEGIN command...
UART UBL's BEGIN commmand received. Sending the Flash UBL code...


The above mentioned sequence keeps on repeating. What could be the problem??

regards,
-Ketan




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