help, Programming flash error!

[Altera_Forum]

in my custom board, i can read the flash and can not write to it ,following is the information when i use the flash Programmer: 

# ! /bin/sh# # This file was automatically generated by the Nios II IDE Flash Programmer.# # It will be overwritten when the flash programmer options change.#   cd D:/altera/kits/hello_world_pll/Debug # Creating .flash file for the FPGA configuration $SOPC_KIT_NIOS2/bin/sof2flash --flash=U2 --offset=0x0 --input=D:/altera/kits/cy1 2pll/cy12pll.sof --output=cy12pll.flash Info: ******************************************************************* Info: Running Quartus II Convert_programming_file Info: Command: quartus_cpf --no_banner --convert D:/altera/kits/cy12pll/cy12pll. sof cy12pll.rbf Info: Quartus II Convert_programming_file was successful. 0 errors, 0 warnings  Info: Processing ended: Sun Oct 15 18:08:18 2006  Info: Elapsed time: 00:00:00 WARNING: Default charset GBK not supported, using ISO-8859-1 instead # Programming flash with the FPGA configuration $SOPC_KIT_NIOS2/bin/nios2-flash-programmer --input=cy12pll.flash --sof=D:/altera /kits/cy12pll/cy12pll_board/system/cy12pll_board.sof --base=0x01000000 Oct 15, 2006 6:08:20 PM - (??) nios2-flash-programmer: Launching Quartus Program mer to download:  D:/altera/kits/cy12pll/cy12pll_board/system/cy12pll_board.sof Pre-Reading 283KBytes of data from U2:  |----.----+----.----|  ********************* (13.125 sec). Erasing 5 Sectors:  |----.----+----.----|  ********************* (2.922 sec). Unable to send write-packet @0 buffer-chunk write failed @0 erase-block write failed @0 write failed @0 Oct 15, 2006 6:08:51 PM - (??) nios2-flash-programmer: Unable to write to flash Oct 15, 2006 6:08:51 PM - (??) nios2-flash-programmer: Error: Write-operation fa iled on device. - exiting.   the flash is AM29LV128ML-123REI, and i use the preset flash parameter in SOPC Builder,the osc is 50Mhz,wiht Q5.0, i have also examed the board several times and the connection is ok ! please help me,thanks!

[Altera_Forum]

--- Quote Start ---  originally posted by cosmosd@Oct 15 2006, 05:22 AM in my custom board, i can read the flash and can not write to it ,following is the information when i use the  flash programmer: # ! /bin/sh# # this file was automatically generated by the nios ii ide flash programmer.# # it will be overwritten when the flash programmer options change.#   cd d:/altera/kits/hello_world_pll/debug # creating .flash file for the fpga configuration $sopc_kit_nios2/bin/sof2flash --flash=u2 --offset=0x0 --input=d:/altera/kits/cy1 2pll/cy12pll.sof --output=cy12pll.flash  the flash is am29lv128ml-123rei, and i use the preset flash parameter in sopc builder,the osc is 50mhz,wiht q5.0, i have also examed the board  several times and the connection is ok ! please help me,thanks! <div align='right'><{post_snapback}> (index.php?act=findpost&pid=18699)  --- quote end ---    --- Quote End ---    Let me say go different page at the first try. I did have a board with bad flash page on 0.