12-4学习笔记

set_property PACKAGE_PIN R1 [get_ports Ai]
set_property IOSTANDARD LVCMOS33 [get_ports Ai]
set_property PACKAGE_PIN N4 [get_ports Bi]
set_property IOSTANDARD LVCMOS33 [get_ports Bi]
set_property PACKAGE_PIN M4 [get_ports Ci_1]
set_property IOSTANDARD LVCMOS33 [get_ports Ci_1]
set_property PACKAGE_PIN K2 [get_ports Si]
set_property IOSTANDARD LVCMOS33 [get_ports Si]
set_property PACKAGE_PIN J2 [get_ports Ci]
set_property IOSTANDARD LVCMOS33 [get_ports Ci]

以上是编辑的约束文件，一开始编辑后报错了，百度了一下，发现可能是没加空格，书上打印出来的东西真的很难看清有没有空格，试着在诸如

set_property PACKAGE_PIN M4 [get_ports Ci_1]
set_property IOSTANDARD LVCMOS33 [get_ports Ci_1]

以上每个值后边都加空格，就不再报错ERROR: [Common 17-163] Missing value for option 'objects', please type 'set_property -help' for usage info.这个了。

标签：IOSTANDARD,12,PIN,get,笔记,学习,set,property,ports
来源： https://blog.csdn.net/wenbu1995/article/details/121712835