papilio fpga

script file,Change the 1000 to a larger number in order to complete more path analysis.Figure 16.7 Register-related node graphHere you can see if the build and hold allowances meet the requirements, as shown in 16.8.Figure 16.8 the remainder viewThen the purpose of timequest is to tell the hardware that you are bound to a certain signal, for a given different form of grid, the allowance is also different, the worst case than give the best situation given more margin. Fmax, the highest frequency

The driver is also written almost, so it is necessary to test the performance? The iperf is used for testing, and the test results of the next s3c6410+ks8851 are compared.1, Iperf How to cross-compile?https://iperf.fr/ official website always to be reliable, the test version is Iperf 2.0.5Get the virtual machine to perform the decompression and configure./configure--host=arm-linuxMakeThere is a small problem, access to the followingGet the generated iperf to the board.2, RTL8211 100m test result

of the components replaced.(4) To test the power flow of a circuit, you can remove the 0ohm resistor, connected to the ammeter, so as to facilitate the measurement of power flow.(5) In the wiring, if the actual cloth is not passed, you can add a 0ohm resistor (should be in-line, should not be surface-mounted).(6) in the high-frequency signal, acting as inductance or capacitance.(7) Single point grounding.(8) between the digital and analog ground between the connection to the common ground, can

The structure of an IO in Chip planner is shownThe left side is the output section to the right of the input section, but will notice two structure: 1, register, 2,delay moduleHere's my guess: These two structures are designed for timing optimization and are mentioned in Altera's timing optimization documentation for the fast input and output registers in the Io cell.If you have the correct timing constraints, the Quartus software can automatically determine whether the register is placed in the

[Serialization] FPGA OpenGL series instances D Trigger of OpenGL I. Principles A trigger is a logic circuit that can store one-bit binary code. It has two complementary outputs. Its output state is not only related to the input, but also to the original output state.D-trigger is one of the triggers and the most widely used one. Its characteristic equation is The logical functions are shown in Table 1.1, II. Implementation In the d

[Serialization] FPGA OpenGL series instances 8-3 BCD seven-segment display decoder in the format I. Principles The 7-segment digital tube uses a combination of different light-emitting segments to display different digital data. To try the digital tube to display the numbers represented by the digital, you must translate the digital data into a decoder, then the block used by the drive is illuminated. The structure is shown in Figure 1.1. For ex

The FPGA Configuration circuit is the same on Cyclone II and cyclone III, but the vcca is different, as shown in: Vcca must connect 2.5 V to cyclone III, and 3.3 V to Cyclone II and cyclone. note this. If you do not pay attention to this, use the download circuit of cycloneii to develop the cycloneiii download circuit, the waiting result cannot be downloaded.ProgramThis example tells us that there may be different series of the same device. Therefor

As mentioned earlier, the measurement frequency at the week of measurement has an error of + 1, because the counting does not necessarily start in the starting time of the gate. For example, when the frequency is measured, the relative error is large at low frequencies. Although there is a saying that the frequency measurement is low frequency, it is difficult to determine a limit. Therefore, we need to find a frequency algorithm once and for all. The same precision frequency measurement can me

Approximate step flow1, camera calibration, image correction2, local matching algorithm :A, Ad-census cost initialization: Calculates the difference between the pairs of binocular images corresponding to all parallax levels, and the resulting result is called the initial cost.B, Cost statistics(Fixed support domain and variable support domain of local matching algorithm, but the cost statistic based on fixed support domain is easy to implement, but it often causes the depth graph to blur at the

typical input device and microcomputer interface schematic diagram (data interface, control interface, storage/buffer). For:... g) You know those common logic levels. Can the TTL and COMs levels be directly interconnected?Ttl,lvttl,cmos,lvcmos, no, TTL can not drive Cmos,cmos can drive TTL;2, programmable logic devices in modern electronic design is becoming more and more important, please ask: A) What are the programmable logic devices that you know about? PLA,CPLD,

Design the simplest RS232 communication logic, the FPGA implementation will receive the data will be sent out, a total of two data transmission pins, a receive. Divide this communication module into three parts: 1. Baud Rate Control Module 2, send the module. 3. Receiving module Here is the Code section: Module Baud_counter (//Inputs input CLK, input reset, input reset_counters,//Outputs output reg baud_clock_rising_e Dge, output reg Baud_clock_fa

1, timing logic. Modify the last practice to how the timing logic will be designed.2,block and unblockingA, nonblocking is usually used in always with clock.B, blocking is usually used in a clock-free always.The blocking used in C,assignD, in the same block, blocking and nonblocking do not coexist.3, Behavioral modelingA,if-else and Case latches.B, cyclic forever,repeat,while,for,generate4, commonly used IP. Fifo,ram,rom. (Schematic design and code design)5, precompiled, System tasks and functio

Here do not repeat UVM for what, do more than half a year FPGA design verification work, according to demand has been written with VHDL test procedures, recently watched a few days UVM verification methodology book, feel this is a good verification tool, now began UVM learning, So ready to use Modelsim to do a Hello world, so go to the Internet casually search the code, test, see below:[Plain]View Plaincopyprint? ' Include ' uvm_pkg.sv Mo

0 is lit and the value of low three bits [3:0] in Num is separated (6 in this case) to display. When Dig_num is 1 o'clock, light the digital tube 1, separate num[7:4] to display (this separates 5). When dig_num = 2 ~ 5 o'clock, the situation is similar. Any time the value in display is converted to the De Shun signal required by the digital tube. Syntax used in this example: Decimal ' d, Hex ' H, octal ' O, binary ' B must be careful, very easy to mistake Fina

Notepad++ is a very special editor, open source software, free to use. Open fast, support up to 27 kinds of syntax (support Verilog and VHDL) high brightness display, auto complement function, and support column operation. After installing the software, the font style is set to Consolas, size 14, and the color style theme is obsidian. The following effects are set:Quartus II software can call the Notepad+ editor, and can be in error, notepad++ can directly highlight the error line. The Setup met

Original posts: http://blog.chinaaet.com/yocan/p/5100017074-------------------------------------------------------- Quartues II 13.1Link: http://pan.baidu.com/s/1pKBfNN9 Password: 8uv8 Modelsim 10.2Link: Http://pan.baidu.com/s/1dFCwxPJ Password: i5vj matlab2014bLink: Http://pan.baidu.com/s/1o79LU3K Password: e63z Altium Designer 14.3Link: http://pan.baidu.com/s/1hsi4cZi Password: ku8z XILINX Vivado 2015.4Link: Http://pan.baidu.com/s/1o8SYYTW Password: 8s6x ISE 14.7Link: http

IMAX (full negative load) required in the entire system should be calculated first, and after determination, the rated current of the fuse is selected for imax/75% use.2) DC resistance P = I2 R, if the power dissipation is too large, consider the thermal problem.3) The rated voltage refers to the maximum voltage that can be sustained when the fuse is blown, and should generally be larger than the entire system input voltage. According to the UL standard, when choosing the rated voltage of the f

---restore content starts---This paper is a reading note on the research of linear array CCD image measurement system based on FPGA.Reading the previous summary still does not understand what the author is going to do. Then read down ....Finally saw a word "image measurement technology based on machine vision", it seems I can find literature in this aspect.Unlike most optoelectronic devices that use current or voltage as a sensing signal, the CCD is a charge signal that transforms a free distrib

I used to be stupid beforeAlways @ (Posedge signal)Such code to detect the rising edge of signal, a lot of problems.After being instructed by a classmate in the lab, he will never do so foolishly. Of course, you won't do that after reading it.The principle of detecting the rising edge: The signal is sampled using a high-frequency clock, so to realize the rising edge detection, the clock frequency must be at least twice times the highest frequency of the signal, or leak detection may occur. See t

. The specific capacitance is best for the same noise compensation as the self-resonant frequency, and we measure this phase relationship with this frequency. When the disturbance zone to the distance of the capacitance, the phase of the compensation current and the noise source phase is exactly the same as 180°, that is, the full reverse phase, when the compensation current is no longer in effect, the decoupling effect is invalid, the compensated energy can not be delivered in time, in order to