使用tcl文件分配管脚

比如在quartus里面建立一个setup.tcl的tcl文件，器件为EP1C6Q240

第3，4行表示所有不用的管脚默认为输入三态



第6，7行分别把芯片的28和2脚分配给了设计中的clk和key1

-Use of tcl quartus such as file allocation pins inside a setup.tcl the tcl file, the device is EP1C6Q240 3,4 line that all unused pins default to input three-state line, respectively, the first 6,7, 28 and 2 of the chip feet allocated to the design of the clk and key1