FPGA

关于LCD1602实现下载的问题，急求基础差啊!

2019-07-16 02:20发布

站内问答 / FPGA
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关于LCD1602显示程序，编译通过，仿真通过，综合通过，但在管脚约束（ucf文件）时报错 错误如下次：
ERROR:MapLib:30 - LOC constraint G12 on Reset is invalid: No such site on the
   device. To bypass this error set the environment variable 'XIL_MAP_LOCWARN'.

总共13个错误。
软件为ISE12.3，VHDL语言编写，开发板为Basys2，SPARTAN-3E芯片。
自己写的约束文件为：
NET "LCD_RS" LOC = "B2" | DRIVE = 2  | PULLUP;
NET "LCD_RW" LOC = "A3" | DRIVE = 2  | PULLUP;
NET "LCD_EN" LOC = "J3" | DRIVE = 2  | PULLUP;
NET "LCD_Data<0>" LOC = "B5" | DRIVE = 2  | PULLUP;
NET "LCD_Data<1>" LOC = "C6" | DRIVE = 2  | PULLUP;
NET "LCD_Data<2>" LOC = "C5" | DRIVE = 2  | PULLUP;
NET "LCD_Data<3>"LOC = "B7" | DRIVE = 2  | PULLUP;
NET "LCD_Data<4>" LOC = "A9" | DRIVE = 2  | PULLUP;
NET "LCD_Data<5>" LOC = "B9" | DRIVE = 2  | PULLUP;
NET "LCD_Data<6>" LOC = "A10" | DRIVE = 2  | PULLUP;
NET "LCD_Data<7>" LOC = "C9" | DRIVE = 2  | PULLUP;
NET "CLK" LOC ="B8" | DRIVE = 2  | PULLUP;
NET "Reset" LOC = "G12";

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1条回答
fighter_fpga
1楼-- · 2019-07-16 04:55
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