...假定选用的目标器件为Altera公司的Cyclone EP1C12Q240型号的FPGA,则需要在FPGA器件配置中添加相应的约束文件(Constraint File),前面介绍过,约束文件是用来指定选用FPGA器件的型号及定义引脚属性的文件。FPGA配置的具体操作过程可以分以下几步完成:
基于16个网页-相关网页
户约束文件 UCF
用户约束文件格式 User Constraint File ; UCF
支持用户约束文件格式 User Constraint File ; UCF
或者在用户约束文件 Usr Constraint File
具有法律约束力的文件 [法] legally binding instrument
时序约束文件 Timing Constraint File
有约束力的文件 binding instrument
图8演示转换如何与CSS文件一起工作,从而根据XML Schema约束文件和本地元数据登记系统中的值创建各种表单控件。
Figure 8 shows how the transform can work together with a CSS file to create various form presentations based on the values in the XML Schema constraint file and a local metadata registry.
该文件不具约束力,但将作为资助保健和计划生育方案的国家和捐助国的指导方针。
The document is non-binding, but it will serve as a guideline for countries and donor states that fund health care and family planning programmes.
例如,在清单5中,一个选项被约束到文件系统的特定部分,重写也可以是有作用域的。
For example, in Listing 5, where an option is restricted to a certain part of the file system, overrides can also be scoped.
应用推荐