lattice fpga

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

to be followed when they are used. 7. Unexpected pain points may occur when IP addresses are used. Therefore, do not use assumptions to imagine the Module Settings. Instead, try to adapt to the environment and configure your own design. As an FPGA player, this ability to change according to the environment is required. 8. Considering cashes settings, there are two types of cash: one is used for instruction caching and the other is used for d

prompting you to design the output of the BUFG to a non-clock pin, which is the ILA logic.In S6, it is recommended that the global clock output only connect to the clock pins, otherwise it is difficult to cause cabling problems easily. The constraint of adding clock_dedicated_route can reduce this error to alarm and continue to run layout and cabling. It is important to note that this constraint does not force the CLK_WE signal to pass through BUFG, but rather tells the tool to ignore such non-

Fanout, that is, fan-out, refers to the module directly called the number of sub-modules, if this value is too large, the FPGA directly displayed as net delay is larger, not conducive to timing convergence. Therefore, you should try to avoid high fan-out when writing code. However, in some special cases, the need of the overall structure design or the inability to modify the code constraints, you need to solve the problem of high fan out through other

) Synchronization of data between MCU side and FPGA end.SPI data from the MCU output, MCU and FPGA is not the same clock domain, you can use the simplest D trigger to achieve data synchronization. The edge detection of the rising edge requires two D flip-flops, in order to ensure the synchronization of the SPI data, the other signals are also synchronized through two levels of trigger output.Access Spi_data

SOURCE ffangularpointilism,ffangularpointilism can create a triangular lattice blur effect like a uiimageview filter. It can be blurred by animation, or it can be blurred at once. In addition, it provides animation to blur the way. Animations can configure the degree of blur and flicker intervals. : How to use:Copy the Ffangularpointilism folder in the demo directly into the project and copy the 4 triangle patterns

Final results come out, Csapp finally did not hang, can have a good year!Well, this time the demand is like this:, in the parent box into the child box, the width of the child box is 50% (33%, 25% similar), so that the appearance of the above effect, seemingly simple, in fact, there are some cumbersome, specific code for. Box{width:400px;height:400px;padding:5px;background-color: #CCC; border-radius:10px;}. block{float:left;width:50%;height:50%;border:5px solid #ccc; box-sizing:border-box;border

This tutorial mainly introduces the method of creating a fashionable and colorful mosaic lattice background in Photoshop to my friends at the foot of the house. The tutorial is very good, and the whole process is no more than 20 minutes, we recommend that you go to the foot home. if you like it, come and learn it. today, I will introduce you in detail how to create a stylish and colorful mosaic lattice back

PHP reads Chinese character lattice data. Background: Simplified Chinese national standard font (set in 1981, mainland China ). 7445 characters, including 6773 first-level Chinese characters and 3755 second-level Chinese characters. Use 2 bytes (16-bit background knowledge: Simplified Chinese national standard font (set in 1981, mainland China ). 7445 characters, including 6773 first-level Chinese characters and 3755 second-level Chinese characters.

the English use of the same width font, so, we can use ordinary nbsp; space to do English characters width adjustment. #x3000;What does "fork 3,000" mean? Haha, is actually full-width space.Chinese fonts are equal width, the width of a full-width space is a common Chinese. Therefore, the above demo emsp; space is changed to full-width space can also drop!However, we can not directly in the page to play full-width space, because in most of the editor hollow