开发板JTAG烧写不进FPGA

guanzixin

FPGA小白一枚，请高手帮忙看看，谢谢~

从朋友那里拿到一块Nios Development Kit, Cyclone Edition.[size=12.307692527770996px]开发套件介绍：
http://www.altera.com/support/ip/processors/kits/ips-nios2-dev-kits.html
http://vlsicad.eecs.umich.edu/BK/Slots/cache/www.altera.com/products/devkits/altera/kit-nios_1C20.html

但通过JTAG烧写程序到开发板后，开发板上的指示灯状态明显不对。
（manual内第33页提到板子上有几个LED状态指示灯。）描述如下：

LED	LED Name	Color	Description
LED3	Loading	Green	This LED blinks while the MAX configuration-controller is actively transferring data from flash memory into the Cyclone FPGA.
LED4	Error	Red	If the red Error LED is on, then configuration was NOT transferred from flash memory into the Cyclone device. This can happen if, for example, the flash memory contains neither a valid user or safe configuration.
LED1	User	Green	If the Cyclone device was successfully configured with data from the EPCS4, LED1 will blink slowly. If the Cyclone device was successfully loaded with the user configuration from flash memory, LED1 will remain on continuously.
LED2	Force Safe	Amber	This LED turns on when the safe configuration is being transferred from flash memory and stays illuminated if the safe configuration was successfully loaded into the Cyclone device.

板子一上电时候，几个灯状态如下：

LED3，绿色
LED4,红色
LED1，LED2熄灭

采用JTAG下载程序后，几个灯状态无变化（仅仅在下载过程中LED4等变暗，下载完成后一切和上电初始态一致）。

这样的状态应该是表示程序没有下载到cyclone的。

flamingwave

你试试GET ID和JTAG DEBUG吧。查一下是线的问题还是板子的问题。