烧录flash的问题，多谢各位指教 flash, 指教

jackhust

我想把一个软件下载到flash中，在下载的过程中遇到如下错误，请问各位这是怎么回事啊？多谢指教！
d:/altera/nios/components/altera_nios_dev_board_cyclone_1c20/system/altera_nios_dev_board_cyclone_1c20.sof
Error: Programming hardware cable not detected
Jan 31, 2005 10:39:00 AM - (??) nios2-flash-programmer: Unable to download SOF: d:/altera/nios/components/altera_nios_dev_board_cyclone_1c20/system/altera_nios_dev_board_cyclone_1c20.sof, exiting
WARNING: Default charset GBK not supported, using ISO-8859-1 instead
make: make: Leaving directory `/cygdrive/d/altera/nios/tutorials/Nios2_HW_Tutorial/1C20/software/hello_world_0/Debug'
*** [ext_flash_programflash] Error 5