fpga book

speechless. Is it really a problem with the software version? Students told me that the only difference between a program and a program is whether an error occurs during pin configuration. However, I have checked it many times, and the configuration is correct. But at this time, I found something strange. When you carefully observe the pin planner interface, you can see two options: voltage and current. Pull to option 1. voltage is 3.3 V by default, which is normal. The current option seems to

//////////////////////////////////////// ////////////////// /************ 50000000 = 500*100*1000 ******************/ Always @ (posedge clk_50m) begin If (! Rst_n | cnt1k = 10 'd499) cnt1k Else if (clk_1k) cnt1k Else cnt1k End Always @ (posedge clk_50m) begin If (! Rst_n) clk_1hz Else if (cnt1k = 10 'd249 clk_1k) clk_1hz Else clk_1hz End 2. Data Path Selection In some system designs, you often need to select a data path and determine its validity. The following describes how to use a f

zookeeper messages of Quartus II and niosii are vague, it is entirely necessary to rely on the "economic" and the "economic" without making any mistakes. See also (originally known) How can we determine the semi-complete information of the timestamp of the niosii that does not match? (IC design) (de2) (nio ii) (SOPC us II) (FPGA builder) (formerly known) de2_nios_lite 1.0 (SOC) (de2) (original topology) How can we determine the distributed agg

. I have already discussed this part in detail. I 'd like to explain it briefly here. Open the Quartus II software, and double-click the kernel to go To the FPGA builder. After entering, we will create a PIO module, and there is a difference in the creation process. Let's take a look, as shown in, at Red Circle 1, we enter 1, because we only need one button (five buttons in the black gold Development Board), and input ports only is selected for the

AbstractIn Quartus II 8.1, Quartus II handbook version 8.1 Vol.4 has made some changes to the nameing Convention of aveon signal type. IntroductionUse environment: US us II 8.1 In Quartus II handbook version 8.1 Vol.4 p.6-4, Altera announced the latest naming convention. The overall change is not significant. It is worth noting that the change of the conductor interface is only one, rather than the original one. I think this change is reasonable, in the past, I had never understood the diff

De2 calendar year code BytesGlobal user instance Http://www.terasic.com.cn/cgi-bin/page/archive.pl? Language = China categoryno = NO = 330 partno = 2 Blog of other Daniel Http://blog.ednchina.com/riple/47380/message.aspx Http://www.cnblogs.com/oomusou/archive/2008/08/11/verilog_edge_detection_circuit.html Altera began to like cookbook. Advanced synthesis cookbook: A Design Guide for Stratix II, Stratix III, and Stratix IV devices May 2007 An 470: Best practices for incremental compi

. Sof file you used is the same as the. Sof file used by the niosii software. Especially if you use Quartus II web edition, _ time_limited.sof will be generated, not the original project name. sof, but because the PTF corresponds to _ time_limited.sof, it is possible to abort without caution. sof.If it fails, skip step 2. Step 2:Import de2_nios.sof of de2 reference design into de2, use Hello World project template, and then import. Sof of your project. I do not know the reason for the license

TI Reference Links:http://www.ti.com.cn/general/cn/docs/gencontent.tsp?contentId=50741----------------------------------------------------------------------------Note Swrite: Stream Write, the data length must be an integer multiple of 8 bytes and does not require a receive-side response. Swrite is the most efficient transmission format, with a lower efficiency for write or read operations with response, and generally only half the efficiency of a non-responsive transmission. -----------

rotary_right;Assign Rotary_left_pos =!rotary_left_reg rotary_left;//ShakeAssign rotary_event = Rotary_right_pos | | rotary_left_pos;//rotation flag bit[Email protected] (Posedge Clk,negedge rst_n) beginif (!rst_n)Shift_d else if (rotary_event) beginif (Rotary_right_pos)Shift_d if (Rotary_left_pos)Shift_d EndEndAssign LED = left-to-right test module for shift_d;//lampEndmodulePrinciple, you can refer to the http://www.eeboard.com/bbs/forum.php?mod=viewthreadtid=45184highlight=%E5%B0%8F%E8%84 o

Use two count modules to count each, get two waveforms for basic and or complete operation. Directly post the code section below.1 ModuleDiv_freq (2 ICLK,3 Irst_n,4 OCLK5 );6 7 input WireICLK;8 input WireIrst_n;9 OutputOCLK;Ten One parameterN =4'd5; A - Regclk_p; - Reg[3:0] cnt_p; the always@ (PosedgeIclkor NegedgeIrst_n)begin - if(!irst_n) -Cnt_p 4'D0; - Else if(cnt_p = = N-1) +Cnt_p 4'D0; - Else +Cnt_p 1'B1; A End at always@ (PosedgeIclkor NegedgeIrst_n)begin - if(

Bcd:binary Coded Decimal is a 4-bit binary encoding that represents a 1-bit decimal number.Definition: BCD code This encoding form uses four bits to store a decimal digit, making the conversion between binary and decimal fast. This coding technique is most commonly used in the design of accounting systems, because the accounting system often requires accurate calculations of long numbers of strings. Relative to the general floating-point notation, the use of BCD code, both to preserve the accura

Generate TCL files on your own initiativeProject -> Generate Tcl File for Project...Popup such as the following dialog box. Sets the script path.Edit PinUse set_location_assignment distribution pins such as the following:The first time the preparation. Without set_location_assignment a statement, set_global_assignment you can do so by adding a line under the statement.Running TCL scriptsTools -> Tcl Scripts...Select the newly created TCL file and click Run to execute it!Faq1. Why there is no inp

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