器件：Nexys3
streamIOvhd.vhd 管脚约束不知道对不对？
Net "flagA" LOC = H1 | IOSTANDARD = LVCMOS33;
Net "flagB" LOC = K4 | IOSTANDARD = LVCMOS33;
Net "slrd" LOC = C2 | IOSTANDARD = LVCMOS33;
Net "usbdb<0>" LOC = E1 | IOSTANDARD = LVCMOS33;
Net "usbdb<1>" LOC = F4 | IOSTANDARD = LVCMOS33;
Net "usbdb<2>" LOC = F3 | IOSTANDARD = LVCMOS33;
Net "usbdb<3>" LOC = D2 | IOSTANDARD = LVCMOS33;
Net "usbdb<4>" LOC = D1 | IOSTANDARD = LVCMOS33;
Net "usbdb<5>" LOC = H7 | IOSTANDARD = LVCMOS33;
Net "usbdb<6>" LOC = G6 | IOSTANDARD = LVCMOS33;
Net "usbdb<7>" LOC = E4 | IOSTANDARD = LVCMOS33;
Net "ifclk" LOC = H2 | IOSTANDARD = LVCMOS33;
Net "slwr" LOC = C1 | IOSTANDARD = LVCMOS33;
Net "sloe" LOC = H6 | IOSTANDARD = LVCMOS33;
Net "fifoadr<1>" LOC = E3 | IOSTANDARD = LVCMOS33;
Net "fifoadr<0>" LOC = H5 | IOSTANDARD = LVCMOS33;
Net "Pktend" LOC = D3 | IOSTANDARD = LVCMOS33;
Net"stmen" LOC=T10 | IOSTANDARD = LVCMOS33;
配置完fpga，调试程序DstmDemo.cpp，执行
提示 Error：DstmIO failed
哪里不对吗？
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