... or a piece of paper, designers describe the high-level design in terms of HDLs VerilogHDL has become one of the popular HDLs for the writing of high-level descriptions Figure 14-2 illustrates ... error because designs are described at a higher level of abstraction High-level design is done without significant concern about design constraints Logic synthesis will convert a high-level design ... timing, area, and power constraints is obtained Conversion from high-level design to gates is fast With this improvement, design cycle times are shortened considerably What took months before can...
... tools can infer unnecessary logic based on the variable definition 14.3.2 Verilog Operators Almost all operators in Verilog are allowed for logic synthesis Table 14-2 is a list of the operators ... that are related to x and z are not allowed, because equality with x and z does not have much meaning in logic synthesis While writing expressions, it is recommended that you use parentheses to ... operator precedence, logic synthesis tools might produce an undesirable logic structure Table 14-2 VerilogHDL Operators for Logic Synthesis Operator Type Arithmetic Operator Symbol Operation Performed...
... discussed in Section 14.3.3, Interpretation of a Few Verilog Constructs The translator understands the basic primitives and operators in the Verilog RTL description Design constraints such as area, ... shown in Figure 14-6 Figure 14-6 Gate-Level Schematic for the Magnitude Comparator The gate-level Verilog description produced by the logic synthesis tool for the circuit is shown below Ports are...
... 0.255524:0.503000:0.936586); endspecify //instantiate a VerilogHDL primitive and (out, in0, in1); endmodule //All library cells will have corresponding module definitions //in terms of Verilog primitives Stimulus is ... description and the gate-level description A typical invocation with a Verilog simulator is shown below //Apply stimulus to RTL description > verilog stimulus.v mag_compare.v //Apply stimulus to gate-level ... modeling trade-offs, for the designer to write efficient, synthesizable Verilog descriptions 14.6.1 Verilog Coding Style[2] [2] Verilog coding style suggestions may vary slightly based on your logic...
... chip 14.8 Summary In this chapter, we discussed the following aspects of logic synthesis withVerilog HDL: • • Logic synthesis is the process of converting a high-level description of the design ... the output to Figure 14-10 Finite State Machine for Newspaper Vending Machine 14.7.4 Verilog Description The Verilog RTL description for the finite state machine is shown in Example 14-6 Example ... at the register transfer level (RTL) Thus, not all Verilog constructs are acceptable to a logic synthesis tool We discussed the acceptable Verilog constructs and operators and their interpretation...
... of integers, floating point numbers, and characters Extensive examples of these representations within the C++ programming language are provided 1.1 Integer Representations The tremendous growth ... model an entity one can introduce a tremendous amount of bias into the thought process associated with the implementation of the entity As an example, consider Eq 1.6 which gives the value of a ... cout statement in C++ is used to output the data It is analogous to the printf statement in C but without some of the overhead The dec, hex, and oct keywords in the cout statement set the output...
... descriptions are often written with HDLs.[2] [2] New EDA tools have emerged to simulate behavioral descriptions of circuits These tools combine the powerful concepts from HDLs and object oriented languages ... used instead of writing behavioral descriptions in VerilogHDL The behavioral description is manually converted to an RTL description in an HDL The designer has to describe the data flow that ... LiB ] 1.4 Importance of HDLs HDLs have many advantages compared to traditional schematic-based design • • • Designs can be described at a very abstract level by use of HDLs Designers can write...
... verify the correctness of VerilogHDL descriptions and to establish equivalency between RTL and gatelevel netlists However, the need to describe a design in VerilogHDL will not go away Assertion ... from HDLs with the object oriented nature of C++ These languages also provide support for automatic stimulus creation, checking, and coverage However, these languages not replace VerilogHDL They ... synthesis did not gain widespread acceptance Today, RTL design continues to be very popular VerilogHDL is also being constantly enhanced to meet the needs of new verification methodologies Formal...
... để mô chức FPGA Class 30/05/2013 Ngôn ngữ mô tả phần cứng Hardware Description Language (HDL) VHDL (VHSIC HDL – Very-High-Speed Integrated Circuit HDL) VerilogHDL (gọi ngắn gọn Verilog) ... endmodule FPGA Class 30/05/2013 Miền thiết kế Silicon (Physical) Circuit Gate FPGA Class 30/05/2013 Thiết kế FPGA thiết kế ASIC (Appication_Specific Integrated Circuit) ASIC FPGA Ngôn ngữ Verilog, VHDL ... displays •10 toggle switches, 10 red LEDs, green LEDs FPGA Class 30/05/2013 11 Cấu tạo chip FPGA (1) FPGA Class 30/05/2013 12 Cấu tạo chip FPGA (2) FPGA Class 30/05/2013 13 Ví dụ minh họa luồng thiết...
... lên cạnh xuống) FPGA Class 30/05/2013 13 Reset bất đồng (Asynchronous reset) Reset xảy tín hiệu reset tích cực bất chấp tín hiệu clock FPGA Class 30/05/2013 14 KẾT THÚC BÀI FPGA Class 30/05/2013 ... vị cổng (gate) = cổng NAND hai ngõ vào FPGA Class 30/05/2013 Cổng đảo, cổng đệm, cổng trạng thái Inverter gate (NOT gate) Tri-state buffer gate Buffer gate FPGA Class 30/05/2013 Cổng AND, cổng ... ngõ vào FPGA Class Bằng tất ngõ vào 30/05/2013 Cổng XOR XNOR Exclusive OR gate (EX-OR) Hai ngõ vào khác ngõ (So sánh khác) Exclusive NOR gate (EX-NOR) Hai ngõ giống ngõ (So sánh bằng) FPGA Class...
... Bài tập ví dụ FPGA Class 30/05/2013 Cấu trúc thiết kế Mỗi module file Các module kết nối với (ngõ vào module nối với ngõ module khác top module) Tên project trùng tên với top module FPGA Class 30/05/2013 ... lệnh endmodule kết thúc module FPGA Class 30/05/2013 Ví dụ khai báo module Đoạn code mô tả mux sang Mux sang Mạch sau tổng hợp Quartus FPGA Class 30/05/2013 Nội dung ... always Phép gán blocking non-blocking posedge negedge Bài tập ví dụ FPGA Class 30/05/2013 10 Các loại toán tử mức ưu tiên Cao Thấp FPGA Class 30/05/2013 11 Nội dung Quy tắc đặt...
... state/current_state next_state Toàn máy trạng thái mạch FPGA Class 30/05/2013 10 Ví dụ máy trạng thái FPGA Class 30/05/2013 11 KẾT THÚC BÀI FPGA Class 30/05/2013 12 ... với hàm If FPGA Class 30/05/2013 Bài tập ví dụ tổng hợp Diễn giải chức mạch? Xác định ngõ vào (tín hiệu vào) ngõ (tín hiệu mạch)? Từ vẽ sơ đồ chân tín hiệu Viết RTL code ngôn ngữ Verilog mô tả ... đủ trường hợp phải ý đến nhánh else để tránh tạo chốt FPGA Class 30/05/2013 Nội dung Hàm If Hàm case Máy trạng thái FSM Ví dụ thực FPGA Class 30/05/2013 Hàm case casex Một nhiều tín hiệu...
... end endmodule FPGA Class 30/05/2013 Cửa sổ khởi động ModelSim FPGA Class 30/05/2013 Tạo Project (1) FPGA Class 30/05/2013 Tạo Project (2) FPGA Class 30/05/2013 Tạo Project (3) FPGA Class 30/05/2013 ... Class 30/05/2013 Tạo File thiết kế (1) FPGA Class 30/05/2013 Tạo File thiết kế (2) Trang viết code Code viết xong FPGA Class 30/05/2013 Tạo thêm file (1) FPGA Class 30/05/2013 10 Biên dịch ModelSim ... Wave (Cửa sổ hiển thị dạng sóng mô FPGA Class 30/05/2013 15 Chạy mô (4) Bấm nút RUN kế để chạy Chọn khoảng thời gian lần chạy FPGA Class 30/05/2013 16 KẾT THÚC BÀI FPGA Class 30/05/2013 17 ...
... signals The VerilogHDL code is shown in in Appendix A 4.1.4 Understanding the Interfacing details withFPGA The Spartan FPGA board that we used for this project has a built-in VGA port with five ... processing streamed images on the FPGA or other embedded system with limited memory Section explains the hardware and software used for the project Section describes the FPGA implementation of the building ... to enhance the display with 16bit color output Section describes the sequential connected component algorithm and HDL implementation Hardware and Software The Spartan FPGA Development board from...
... Tóm tắt giảng TK Hệ Thống Số Phần Verilog CHƯƠNG I TỔNG QUAN VerilogHDL hai ngôn ngữ mô phần cứng thông dụng nhất, dùng thiết kế IC, ngôn ngữ VHDL HDL cho phép mô thiết kế dễ dàng, sửa chữa ... Số Phần Verilog TÀI LIỆU THAM KHẢO Verilog Digital System Design” “Introduction of Verilog Zainalabedin Navadi Northeastern University University of Tehran Peter M Nyasulu “Cadence Verilog ... +, &, != VII Từ khóaVerilog: Có từ mà phải có ý nghóa đặc biệt Verilog Ví dụ: assign, case, while, wire, reg, and, or, nand, module Chúng không dùng từ đònh danh Từ khóa Verilog bao gồm dẫn chương...
... shown) HDL plasma levels are inversely related to BMI Thus potential associations of PPARδ with HDL- C levels could be masked by the profound effect of overweight on HDL- C in the patients with high ... allele frequencies in patients with a BMI above the median were compared with those below the median Patient characteristics for each group are presented in table Within the group of leaner patients ... above and below median BMI (24.6) Below median BMI n total n with chd n without chd Age (years) BMI (kg/m²) Cholesterol (mg/dl) LDL HDL VLDL Triglycerides (mg/dl) Apo B (mg/dl) Apo A1 (mg/dl)...
... trình (PLI ) c a Verilog cung c p m t môi trư ng cho vi c truy xu t c u trúc d li u Verilog s d ng m t thư vi n ch a hàm c a ngôn ng C 1.2.3 Ngôn ng Verilog Ngôn ng VerilogHDL áp ng t t c nh ... h tr c a B qu c phòng (DoD), VHDL c s d ng nhi u nh ng d án l n c a ph M Trong n l c ph bi n Verilog, vào năm 1990, OVI ( Open Verilog International) c thành l p Verilog chi m ưu th lĩnh v c ... d a Verilog ã có s n, chu n Verilog IEEE nhanh chóng c ch p nh n sâu r ng c ng thi t k ng i nt M t phiên b n m i c a Verilog c ch p nh n b i IEEE vào năm 2001 Phiên b n m i c xem chu n Verilog- 2001...