文件名称:Example-8-1
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我的观点是Verilog和VHDL对于高手而言各有利弊,Verilog感觉更适合于RTL(寄存器传输级)的描述,而VHDL更适于System级的建模。
但是初学者强烈建议学习Verilog,更容易入手些,但是学习过程中一定要注意下面一点,毕竟国内外大公司现在大都采用Verilog是有其原因的。
l FPGA/CPLD、ASIC的逻辑设计所采用的硬件描述(HDL)语言是同软件语言(如C,C++等)是有本质区别的!虽然Verilog很多语法规则和C语言相似,但是Verilog是硬件描述语言,它的本质作用在于描述硬件。虽然它使用了C语言的形式,但是Verilog描述的硬件的抽象,它的最终实现结果是芯片内部的硬件电路。所以评判一段HDL代码的优劣的最终标准是:其描述并实现的硬件电路的性能(包括面积和速度两个方面)。初学者,特别是由软件转行的初学者,片面追求代码的整洁,简短,这是错误的!是与评价HDL的标准背道而驰的!正确的编码方法是,首先要做到对所需实现的硬件电路“心有成竹”,对该部分硬件的结构与连接十分清晰,然后用合适的HDL语句表达出来即可。-Modular Design Example-8-1
但是初学者强烈建议学习Verilog,更容易入手些,但是学习过程中一定要注意下面一点,毕竟国内外大公司现在大都采用Verilog是有其原因的。
l FPGA/CPLD、ASIC的逻辑设计所采用的硬件描述(HDL)语言是同软件语言(如C,C++等)是有本质区别的!虽然Verilog很多语法规则和C语言相似,但是Verilog是硬件描述语言,它的本质作用在于描述硬件。虽然它使用了C语言的形式,但是Verilog描述的硬件的抽象,它的最终实现结果是芯片内部的硬件电路。所以评判一段HDL代码的优劣的最终标准是:其描述并实现的硬件电路的性能(包括面积和速度两个方面)。初学者,特别是由软件转行的初学者,片面追求代码的整洁,简短,这是错误的!是与评价HDL的标准背道而驰的!正确的编码方法是,首先要做到对所需实现的硬件电路“心有成竹”,对该部分硬件的结构与连接十分清晰,然后用合适的HDL语句表达出来即可。-Modular Design Example-8-1
(系统自动生成,下载前可以参看下载内容)
下载文件列表
Example-8-1\Modular_Design\Imp_modules\module_a\module_a.cel
...........\..............\...........\........\module_a.edf
...........\..............\...........\........\module_a.ngo
...........\..............\...........\........\module_a.ucf
...........\..............\...........\........\netlist.lst
...........\..............\...........\........\top.bld
...........\..............\...........\........\top.mrp
...........\..............\...........\........\top.ncd
...........\..............\...........\........\top.ngd
...........\..............\...........\........\top.ngm
...........\..............\...........\........\top.ngo
...........\..............\...........\........\top.pcf
...........\..............\...........\........\top_ngdbuild.nav
...........\..............\...........\........\top_routed.dly
...........\..............\...........\........\top_routed.ncd
...........\..............\...........\........\top_routed.pad
...........\..............\...........\........\top_routed.par
...........\..............\...........\........\top_routed.twr
...........\..............\...........\.......b\module_b.ngc
...........\..............\...........\........\module_b.ucf
...........\..............\...........\........\netlist.lst
...........\..............\...........\........\top.bld
...........\..............\...........\........\top.mrp
...........\..............\...........\........\top.ncd
...........\..............\...........\........\top.ngd
...........\..............\...........\........\top.ngm
...........\..............\...........\........\top.ngo
...........\..............\...........\........\top.pcf
...........\..............\...........\........\top_ngdbuild.nav
...........\..............\...........\........\top_routed.dly
...........\..............\...........\........\top_routed.ncd
...........\..............\...........\........\top_routed.pad
...........\..............\...........\........\top_routed.par
...........\..............\...........\........\top_routed.twr
...........\..............\...........\........\top_routed.xpi
...........\..............\...........\.......c\module_c.edf
...........\..............\...........\........\module_c.ngo
...........\..............\...........\........\module_c.ucf
...........\..............\...........\........\netlist.lst
...........\..............\...........\........\top.bld
...........\..............\...........\........\top.mrp
...........\..............\...........\........\top.ncd
...........\..............\...........\........\top.ngd
...........\..............\...........\........\top.ngm
...........\..............\...........\........\top.ngo
...........\..............\...........\........\top.pcf
...........\..............\...........\........\top_ngdbuild.nav
...........\..............\...........\........\top_routed.dly
...........\..............\...........\........\top_routed.ncd
...........\..............\...........\........\top_routed.pad
...........\..............\...........\........\top_routed.par
...........\..............\...........\........\top_routed.twr
...........\..............\...........\........\top_routed.xpi
...........\..............\....top\netlist.lst
...........\..............\.......\ngd2ver.log
...........\..............\.......\ngd2vhdl.log
...........\..............\.......\top.alf
...........\..............\.......\top.bld
...........\..............\.......\top.cel
...........\..............\.......\top.edf
...........\..............\.......\top.fnf
...........\..............\.......\top.mrp
...........\..............\.......\top.ncd
...........\..............\.......\top.nga
...........\..............\.......\top.ngd
...........\..............\.......\top.ngm
...........\..............\.......\top.ngo
...........\..............\.......\top.pcf
...........\..............\.......\top.sdf
...........\..............\.......\top.ucf
...........\..............\.......\top.v
...........\..............\.......\top.vhd
...........\..............\.......\top_constraints.ucf
...........\..............\.......\top