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Run yosys and get output

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D4VID 1 month ago
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2
.gitignore vendored
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/target
.nvim

278
Cargo.lock generated
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8
Cargo.toml
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[package]
name = "verilog2logicworld"
version = "0.1.0"
edition = "2021"
[dependencies]
json = "0.12.4"
tempfile = "3.20.0"

8
counter.v
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module counter(input clk, input rst, input inc, output reg [3:0] cnt);
always @(posedge clk) begin
if (rst)
cnt <= 0;
else if (inc)
cnt <= cnt + 1'b1;
end
endmodule

3
gates.v
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module gates(input a, input b, input c, output wire out);
assign out = a & b | c;
endmodule

70
src/main.rs
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use std::{
fs::File,
io::{self, Read},
process::{Command, Stdio},
};
use tempfile::tempdir;
#[derive(Debug)]
enum Error {
ExitCode(i32),
Terminated,
TempDir,
NoOutput,
Execute,
IO(io::Error),
InvalidJson,
}
impl From<io::Error> for Error {
fn from(value: io::Error) -> Self {
Self::IO(value)
}
}
fn run_yosys(yosys_command: &str, module: Option<&str>, files: &[&str]) -> Result<(), Error> {
let tmp = tempdir().map_err(|_| Error::TempDir)?;
let tmp_file_path = tmp.path().join("modules.json");
let mut command = Command::new("yosys");
command.args(["-o", tmp_file_path.to_str().unwrap(), "-p", yosys_command]);
command.args(files);
if let Some(module) = module {
command.args(["-r", module]);
}
let result = command
.stdout(Stdio::null())
.status()
.map_err(|_| Error::Execute)?;
if let Some(code) = result.code() {
if code != 0 {
return Err(Error::ExitCode(code));
}
} else {
return Err(Error::Terminated);
}
let mut file = File::open(tmp_file_path).map_err(|_| Error::NoOutput)?;
let mut file_contents = String::new();
file.read_to_string(&mut file_contents)?;
println!("{}", file_contents);
let object = json::parse(&file_contents).map_err(|_| Error::InvalidJson)?;
println!("{:?}", object["modules"]);
return Ok(());
}
fn main() {
let result = run_yosys("proc;", None, &["gates.v"]);
println!("{:?}", result);
let result = run_yosys("proc; flatten; wreduce; opt; fsm; opt; memory -nomap -nordff; opt; muxpack; peepopt; async2sync; wreduce; opt -mux_bool", Some("$abstract\\gates"), &["gates.v"]);
println!("{:?}", result);
}
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