papilio fpga

In a digital logic system, there are only high voltage and low level. Therefore, it indicates that a number is only in the integer form, and there are three Representation Methods: original code representation (symbol plus absolute value), reverse code notation (symbol plus reverse code) and complement code notation (symbol plus complement ). These three methods are widely used in FPGA development. 1. Original code representation The original code rep

Fanout, that is, the number of lower-level modules directly called by the module. If this value is too large, the FPGA directly shows a large value of net delay, which is not conducive to Time Series Convergence. Therefore, you should try to avoid high fan-out situations when writing code. However, in some special cases, it is necessary to use other optimization methods to solve the problems caused by high fan output due to the need for the overall st

4 K (3840 x 2160 @60hz) is increasingly becoming a video trend, and how to connect 4K to a splice is a tricky issue.DP enters into the anx1122, through the ANX1122 the DP input signal to the LVDS signal, and then through the FPGA to the LVDS signal to the Video line field signal, and then the field signal through the SerDes sent out. The output card receives the SerDes signal, then turns it into the line field signal, then does the splicing processing

1. Do a stopwatch example today to introduce the FPGA project with Vivado2. Use two keys key0(stopwatch drive, pause),key1The following demonstrates the Vivado operation Process1.create Project(figure)2. It is usually selected (figure)3. do not select source files (figure)4. Select the chip (we use the xc7a35tftg256-1) can also use filters to select the chip (figure)5. Click Finish, our project is created, but a blank, we will eventually produce a bi

cake Draw_sector3d ($img, $ox, $oy, $a, $b, $v, $SD, $ed, $clrLst [$i]); $SD, $ed, $clrLst [$i]); Draw Labels Imagefilledrectangle ($img, 5, $ly, 5+ $fw, $ly + $fh, $clrLst [$i]); Imagerectangle ($img, 5, $ly, 5+ $fw, $ly + $fh, $CLRT); Imagestring ($img, $font, 5+2* $fw, $ly, $labLst [$i]. ":". $datLst [$i]. " (". (Round (10000* ($datLst [$i]/$tot))/100). "%)", $CLRT); $str = Iconv ("GB2312", "UTF-8", $labLst [$i]); Imagettftext ($img, $font, 0, 5+2* $FW, $ly +13, $CLRT, "./simsun.ttf", $str.

Eight tips for solving FPGA timing problemsAdvice one, if the timing difference is not much, within 1NS, can be modified by the synthesis, layout and routing options to fix, if the difference is much, you have to move the code.Second, take a look at the timing report, pick a path with the most tight timing, and take a closer look at what the reason is, first look at the number of logical series? What kind of circuit is wrong, the multiplier or the Ram

Multi-function Selection of pins involved in FPGA: some pins can be allocated as common I/O pins or programming pins. By default, these special pins are used as programming pins. If you want to use these pins as common I/O Ports, you must set them in the FPGA development tool, select an ordinary IO port. Otherwise, the following error occurs: Error: Can't place multiple pins assigned to pin location pin_30

First, the chip is divided into chip-level and system-level Chip level is, just a chip, such as 51 single-chip microcomputer, you can write a program, download and follow the program to run, before and after the program System level is, can run operating system, such as ARM,SOC, have RAM and ROM Cpu: Computers should understand that the central processing Unit, computer computing core and control core, all of the following chips contain CPU, chip-level MPU: microprocessor, including CPU on

The recent project needs to use differential signal transmission, so we look at the use of differential signals on the FPGA. In Xilinx FPGAs, differential signals are sent and received primarily via primitives: Obufds (differential output buf), Ibufds (differential input buf).Note that when assigning pins, only the pins of the signal_p are assigned, and the Signal_n is automatically connected to the respective differential pair pins, without the LVDS

Multi-channel serial Adda module test manuals for the core Route FPGA Learning Suite?This manual introduces the test methods of the Adda module provided by the core Route FPGA learning kit in a concise manner:? Connect the development board as follows: 2. Connect the Adda V1.1 module with the development Board as shown: Open the test engineering da_ad_v1.1 as shown in:

Analog camera decoding module latest test TVP5150 module FPGA+SDRAM+TVP5150+VGA realization pal AV input VGA video outputTest using the TV set-top box AV analog signal input, VGA display output test, the effect is as followsThe FPGA uses Verilog programming, and the top-level RTL view is as followsModule ACTION_VIP (Input CLK,Inputreset_n,inputbt656_clk_27m,Input[7:0]bt656_data,Output [12:0] sdram_addr,//Ou

Source: http://blog.sina.com.cn/s/blog_3ef1296d0101aob6.html three, FPGA pin allocation file Preservation methodWhen using someone else's project, sometimes can't find his pin file, but can save his already bound pin, output to the file.method One:View pin bindings, Quartus-Assignment, Pins, open the FPGA pin interface, where the pin file can be saved in CSV format (tabular format) and TCL format in t

ArticleDirectory Introduction Build HDL Hardware settings Software Development Statement: This article is original works, copyright belongs to the author of this blog, If You Need To reprint, please indicate the source of http://www.cnblogs.com/kingst/ Introduction As an embedded software-core processor built on FPGA, niosii can add any provided peripherals as needed, you can also customize user logic peripherals and Custom Us

1. Asynchronous resetAlways @ (Posedge sclk or Negedge s_rst_n)if (!s_rst_n)D_out else D_out The consolidated RTL view is as follows:You can see that the register d_out has a low-level effective reset signal S_rst_n port, even if the design is high power level, the actual synthesis will also reverse the asynchronous reset signal back to the CLRN end;2. Synchronous resetAlways @ (Posedge sclk)if (!s_rst_n)D_out else D_out The consolidated RTL view is as follows:It can be seen that the synchronous

1 speed and area The overall speed and area optimization will implement the logical topology that RTL will use. For FPGA, because of the lack of backend knowledge, comprehensive tools will mainly implement door-level optimization. Generally, higher speed requires higher concurrency and larger area, but this is not the case in some special cases. Because the layout and wiring of FPGA have a second-order effe

When FPGA area optimization 1 does not require high speed, we can design the pipeline into an iterative form to reuse resources with the same FPGA functionality. 2. When the control logic is smaller than the sharing logic, the control logic resources can be used for reuse. For example, in the implementation of the FIR filter, the multiplier is a shared resource. We can implement the state machine by contro

Link: http://www.altera.com.cn/literature/wp/wp-01166-bdti-altera-floating-point-dsp.pdf In the future, it will be more meaningful to conduct a comparison test of Xilinx DSP architecture FPGA based on the testing method in this article. But remember: the human brain is the best optimizer! Introduction: OverviewFPGAs are increasingly used as Parallel Processing engines for demanding digitalSignal processing applications. benchmark results show that on

I. Summary Summarize the distribution and storage methods of FPGA pins in US us II. Ii. Pin Allocation Method In addition to qii software, you can select the "assignments-> pin" label (or click the button) to open the pin planner and assign the pin. The following two methods are available for Pin allocation. Method 1: Import assignments Step 1: Use notepad or similar software to create a TXT file (or CSV file) and write the pin distribu

In FPGA code design, remember to have a "principle". For three-state ports, try to use three-state ports in the top-layer modules instead of internal sub-modules. Otherwise, there will be a series of problems, I have always followed this principle to design the code. The figure shows a little curious. in the computer, most modules mounted on the bus are in three states, as a result, each of the three-state sub-modules connects to the outside through a