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use std::collections::HashMap;
use crate::toolchains::map_signal_type_to_xilinx_string;
use rust_hdl::core::prelude::*;
#[derive(Default)]
struct UCFGenerator {
path: NamedPath,
namespace: NamedPath,
ucf: Vec<String>,
names: HashMap<usize, String>,
}
pub fn collect_xrefs(txt: &[String]) -> Vec<(String, String)> {
let xref = regex::Regex::new(r#"!(\d*)!"#).unwrap();
let mut ret = vec![];
for line in txt {
for capture in xref.captures_iter(line) {
if let Some(t) = capture.get(0) {
if let Some(p) = capture.get(1) {
let capture = (t.as_str().to_string(), p.as_str().to_string());
if !ret.contains(&capture) {
ret.push(capture);
}
}
}
}
}
ret
}
pub fn substitute_refs(
txt: &[String],
xrefs: &[(String, String)],
name_map: &HashMap<usize, String>,
) -> Vec<String> {
let mut ret = vec![];
for line in txt {
let mut line = line.clone();
for (from, to) in xrefs {
let index = to.parse::<usize>().unwrap();
if let Some(name) = name_map.get(&index) {
line = line.replace(from, name);
}
}
ret.push(line);
}
ret
}
impl Probe for UCFGenerator {
fn visit_start_scope(&mut self, name: &str, _node: &dyn Block) {
let _top_level = self.path.to_string();
self.path.push(name);
self.namespace.reset();
}
fn visit_start_namespace(&mut self, name: &str, _node: &dyn Block) {
self.namespace.push(name);
}
fn visit_atom(&mut self, name: &str, signal: &dyn Atom) {
let namespace = self.namespace.flat("$");
let name = if namespace.is_empty() {
name.to_owned()
} else {
format!("{}${}", namespace, name)
};
for pin in &signal.constraints() {
self.names.insert(signal.id(), name.clone());
let prefix = if signal.bits() == 1 {
format!("NET {}", name)
} else {
format!("NET {}<{}>", name, pin.index)
};
match &pin.constraint {
Constraint::Location(l) => {
self.ucf.push(format!("{} LOC={}", prefix, l));
}
Constraint::Kind(k) => {
let name = map_signal_type_to_xilinx_string(k);
self.ucf.push(format!("{} IOSTANDARD={}", prefix, name))
}
Constraint::Timing(t) => {
let timing = match t {
Timing::Periodic(p) => {
format!("{prefix} TNM_NET={net}; TIMESPEC {ts} = PERIOD {net} {period} ns HIGH {duty}%",
prefix=prefix,
net=p.net,
ts=format!("TS_{}", p.net),
period = p.period_nanoseconds,
duty = p.duty_cycle)
}
Timing::InputTiming(i) => {
format!("{prefix} OFFSET = IN {offset} ns VALID {valid} {relative} !{id}!{bit} {edge}",
prefix = prefix,
offset = i.offset_nanoseconds,
valid = i.valid_duration_nanoseconds,
relative = i.relative.to_string(),
id = i.to_signal_id,
bit = if let Some(n) = i.to_signal_bit {
format!("<{}>", n)
} else {
"".into()
},
edge = i.edge_sense.to_string()
)
}
Timing::OutputTiming(o) => {
format!(
"{prefix} OFFSET = OUT {offset} ns {relative} !{id}!{bit} {edge}",
prefix = prefix,
offset = o.offset_nanoseconds,
relative = o.relative.to_string(),
id = o.to_signal_id,
bit = if let Some(n) = o.to_signal_bit {
format!("<{}>", n)
} else {
"".into()
},
edge = o.edge_sense.to_string()
)
}
Timing::Custom(c) => c.to_string(),
Timing::VivadoFalsePath(_) => "".to_string(),
_ => unimplemented!("Unknown timing constraint for ISE/UCF generation"),
};
if !timing.is_empty() {
self.ucf.push(timing);
}
}
Constraint::Custom(s) => self.ucf.push(s.clone()),
_ => {
unimplemented!("Unsupported constraint type for UCF files")
}
}
}
}
fn visit_end_namespace(&mut self, _name: &str, _node: &dyn Block) {
self.namespace.pop();
}
fn visit_end_scope(&mut self, _name: &str, _node: &dyn Block) {
self.path.pop();
}
}
pub fn generate_ucf<U: Block>(uut: &U) -> String {
let mut ucf = UCFGenerator::default();
uut.accept("top", &mut ucf);
let xrefs = collect_xrefs(&ucf.ucf);
let ucf_lines = substitute_refs(&ucf.ucf, &xrefs, &ucf.names);
let mut ucf_uniq = vec![];
for line in ucf_lines {
if !ucf_uniq.contains(&line) {
ucf_uniq.push(line);
}
}
ucf_uniq.join(";\n")
}
