xeon fpga

Source of the problem:The serial data interface is debugged, and the data line is expected to be nanosecond-delay in CPLD (EPM570).Resolution process:--Using Insert Lcell to delay, Lcell delay is relatively fixed but will be affected by temperature, device and other factors;The Insert method is as follows:Wire ad1_ch0_wire; = adc_b0; Lcell U0_lcell/** * ( . inch (Ad1_ch0_wire), . out (Ad1_ch0) );Note that need /* Synthesis keep */To keep Lcell is not optimized in

Some other modules on the stopwatch can be turned into electronic clocks, using the following conventions: Use key[0] As the reset button, after reset display 00:00. Using key[1] As the Adjust/pause button, the two lamps that the electronic clock adjusts during the pause keep blinking at 1Hz. Use key[2] As the Adjust left shift button, key[3] as the adjustment to the right shift. Look at the schematic diagram, too large to divide into four pieces:The code is as follows:Code everyon

At the beginning of some of the information, we actually talk about the same, but I see foggy, should be not really understand this thing.Today, the whim of the "seven days to play turn Altrea time series" took out to see, should have some enlightened feeling, in the next is stupid, want to understand a thing too slow.First look at the register-to-register path, 1:Data arrive time: the date when the reg2.d is reached. When timing analysis is performed, the data arrive time calculation formula is

, you can. Figure 6.10 is the distribution of the Pin planner.Figure 6.7 Tcl FileFigure 6.8 Operation in Quartus II (i)Figure 6.9 operation in Quartus II (II)Figure 6.10 Pin Planner AssignmentTips for 4:jic Curing file generationClick File----Convert programming file, and the interface shown in 6.11 appears. Select the. JIC in the programming file type, select the EPCS4 in the configuration device (this is based on the selection of the chip's profile that you use, the author is EPCS4), and then

is the Verilog 2001 language, Quartus II 8.0 can also be read.The current Quartus II 8.0 does not support/*synthesis keep*/under the whole module, the reason is unclear, I actually use Quartus II 8.0 test, SIGNALTAP II is not, and quartus II's help does not say it can be/*synthesis keep*/the entire module.ConclusionAbout Avoiding Quartus II reg,/*synthesis noprune*/and/*synthesis preserve*/There are some differences, the program is written to a very large time, it may be difficult to decide whi

In Chip Planner, when you watch your feet, you'll see the pin and pad appear at the same time,such as pin120/pad174 Bank 4So what's the difference?Pin refers to the chip is packaged in the pin, that is, the user sees the pin;Pad is the pin of the wafer, is encapsulated in the inside of the chip, the user can not see.There is also a wire connection between the pad and the pin.Pad also refers to the input and output buffer/register unit.Further in the Resource property Editor see the PAD as follow

Altera's RAM initialization file format is MIF and hex. Quartusii's own RAM initialization tool facilitates the generation of initialization files.Xilinx's RAM initialization file format is the Coe, and in Vivado the software turns the Coe file into a MIF file. Xilinx and Altera MIF file formats are not the same. The Xilinx MIF file is the final valid initialization file. You can use the Memory Editor editing tool to generate a Coe file, located in tools > MemoryEditor. reference files can also

1, the FPGA does not use the PIN must be set to a high impedance state setting the path as follows:Assignmen->device->devicepin option->unused pins->as inputs tri-stated. If the high resistance is not set, the circuit may cause weak current or other effects, for example: there may be a faint current led to glow through the LED. 2, PIN locking has a hint:Error:can ' t place multiple pins assigned to pin location pin_xxx (IOPAD_X34_Y18_N21)Workaround:As

0. IntroductionIn the use of quartus software, often occasionally found some small tricks, the purpose of this article is to summarize the search or find tips, this article has been updated for a long time.1. Template features in QuartusRecently found a good place in Quartus II's menu: language template.You can see the language templates for Verilog HDL, SystemVerilog, VHDL, AHDL, Quartus II tcl, Tcl under Edit, Insert template.Below the Verilog HDL, you can find basic logical operators, basic l

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