nextpnr | Unofficial nextpnr WebAssembly packages

by YoWASP Shell Version: Current License: ISC

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | nextpnr Summary

nextpnr is a Shell library. nextpnr has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

The YoWASP nextpnr suite of packages provides [nextpnr][] and related tools for several FPGA families built for [WebAssembly][]. See the [overview of the YoWASP project][yowasp] for details. The suppored FPGA families are: * Lattice iCE40 (via [Project IceStorm][icestorm]); * Lattice ECP5 (via [Project Trellis][trellis]); * Lattice Nexus (via [Project Oxide][oxide]); * Gowin GW1N (via [Project Apicula][apicula]). [nextpnr]: [webassembly]: [yowasp]: [icestorm]: [trellis]: [oxide]: [apicula]:

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Support

nextpnr has a low active ecosystem.

It has 11 star(s) with 2 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of nextpnr is current.

Quality

nextpnr has 0 bugs and 0 code smells.

Security

nextpnr has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

nextpnr code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

nextpnr is licensed under the ISC License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

nextpnr releases are not available. You will need to build from source code and install.

Top functions reviewed by kandi - BETA

kandi has reviewed nextpnr and discovered the below as its top functions. This is intended to give you an instant insight into nextpnr implemented functionality, and help decide if they suit your requirements.

Run ipll
Run wasm
Run anicepll command
Parse command line arguments
Run ICemulti
Run nextpnr process
Run nextpnr_ecp5
Run the exunpack command
Run the yaw package
Run the command line interface
Run an EMA program
Run aniceBram command
Run anicebram script
Run iicepack command
Runs anicepack script
Unpack the command line arguments
Run icepack
Run nextpnr script
Run the nextpnr code
Runs the command line interface
Run yawll
Run the program
Run Prjoxide
Run nextpnr gate
Return the package version
Return the long description of the README md file

Get all kandi verified functions for this library.

nextpnr Key Features

No Key Features are available at this moment for nextpnr.

nextpnr Examples and Code Snippets

No Code Snippets are available at this moment for nextpnr.

Community Discussions

Trending Discussions on nextpnr

ice40 clock delay, output timing analysis

Verilog module parameters in seperate config file?

QUESTION

ice40 clock delay, output timing analysis

Asked 2020-Jul-18 at 08:36

I have an ice40 that drives the clock and data inputs of an ASIC.

The ice40 drives the ASIC's clock with the same clock that drives the ice40's internal logic. The problem is that the rising clock triggers the ice40's internal logic and changes the ice40's data outputs a few nanoseconds before the rising clock reaches the ASIC, and therefore the ASIC observes the wrong data at its rising clock.

I've solved this issue by using an inverter chain to delay the ice40's internal clock without delaying the clock driving the ASIC. That way, the rising clock reaches the ASIC before the ice40's data outputs change. But that raises a few questions:

Is my strategy -- using an inverter chain to delay the ice40 internal clock -- a good strategy?
To diagnose the problem, I used Lattice's iCEcube2 to analyze the min/max delays between the internal clock and output pins:

Notice that the asic_dataX delays are shorter than the clk_out delay, indicating the problem.

Is there a way to get this information from yosys/nextpnr?

Thank you for any insight!

...

ANSWER

Answered 2020-Jul-18 at 08:36

Instead of tinkering with the delays I would recommend to use established techniques. For example SPI simple clocks the data on the one edge and changes them on the other: .

The logic to implement that is rather simple. Here an example implementation for an SPI slave:

Source https://stackoverflow.com/questions/62905634

QUESTION

Verilog module parameters in seperate config file?

Asked 2020-Jan-18 at 09:04

The Lattice FPGA I am using has embedded RAMs, which can be preloaded with data through the configuration binary.

The predefined Verilog modules for these RAMs implement this by providing Parameters named INIT_0 , INIT_1 , INIT_2 , ... , each a 256-bit value, to do this.

So my code to instantiate the RAM looks like this:

...

ANSWER

Answered 2020-Jan-17 at 14:38

I had a similar issue with using TSMC memories. TSMC has an "INIT" parameter/`define where you can set a text file to read in the verilog hex values. The issue was, I had multiple memories, so I would need multiple files, with multiple parameters on each instance of the memory (but I was trying to keep the code clean with an index of memories based on a parameter). This however was easier said than done, and also with the `define it would require a re-compile during regressions.

So what I did was create a Python script that would read in my disassembled code (or whatever data you want to read) and constructed assign statements that get executed right after time 0 (to account for the memory init). This file would be created as part of my make flow for CPU SW, so it was always up to date. I opted for this as we already had some scripts that were generating other portions for design and testing, and we just needed a way to force memory contents during quick debug testing instead of waiting for the memories to be programmed.

Source https://stackoverflow.com/questions/59786569

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install nextpnr

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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