6678启动方式是用FPGA启动，仿真调试过程是用的0核，gel文件已经配置。在连接的时候出现以下错误提示：
Error connecting to the target: (Error -2131 @ 0x0) Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK)
请问如何解决。
