求教一下约束文件怎么写

iter_1 · 发表于 2013-8-8 21:46:21

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这是代码，一个简单的抢答器模块//////////////////////////////////////////////////////////////////////////////////
module qdq(

emcee,

cin1,

cin2,

cin3,

cin4,

led
);

这是约束文件
##
NET emcee                               LOC = N4 | IOSTANDARD = "LVCMOS18"; ## SW2 pushbutton
##

########LED Pin define#####################
NET led[0]
LOC = T10 | IOSTANDARD = "LVCMOS33";    ## LED1
NET led[1]
LOC = N10 | IOSTANDARD = "LVCMOS33";    ## LED2
NET led[2]                            LOC = T12 | IOSTANDARD = "LVCMOS33";    ## LED3
NET led[3]                            LOC = R10 | IOSTANDARD = "LVCMOS33";    ## LED4

########Switch Pin define#####################
NET cin1
   LOC = P4 | IOSTANDARD = "LVCMOS18";       ## KEY1
NET cin2
   LOC = F6 | IOSTANDARD = "LVCMOS18";       ## KEY2
NET cin3
   LOC = E4 | IOSTANDARD = "LVCMOS18";       ## KEY3
NET cin4
   LOC = F5 | IOSTANDARD = "LVCMOS18";       ## KEY4

完全是按照开发板自带的约束文件改了名字，和模块中的一样，可以出现了错误。
错误信息如下:

ERROR:MapLib:30 - LOC constraint E4 on cin3 is invalid: No such site on the
device. To bypass this error set the environment variable 'XIL_MAP_LOCWARN'.
ERROR:MapLib:30 - LOC constraint T12 on led<2> is invalid: No such site on the
device. To bypass this error set the environment variable 'XIL_MAP_LOCWARN'.
ERROR:MapLib:30 - LOC constraint N10 on led<1> is invalid: No such site on the
device. To bypass this error set the environment variable 'XIL_MAP_LOCWARN'.

谁知道什么原因呢？？求赐教