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+use std::collections::BTreeSet;
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+use std::io::{BufWriter, Write};
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+
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+use super::mcu::{Mcu, Pin};
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+
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+pub fn draw(mcu: &Mcu, shown_peripherals: &BTreeSet<String>) -> Vec<u8> {
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+ let mut output = Vec::new();
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+ let mut writer = BufWriter::new(&mut output);
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+ let package = match Package::from_str(&mcu.package) {
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+ Some(package) => package,
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+ None => panic!("Package {} not yet supported.", mcu.package),
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+ };
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+
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+ let mut peripherals = BTreeSet::new();
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+ for pin in mcu.pins.iter() {
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+ for function in pin.functions.iter() {
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+ let peripheral = Pin::split_function(function).0;
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+ if shown_peripherals.len() != 0 && !shown_peripherals.contains(peripheral) {
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+ continue;
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+ }
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+ if !peripherals.contains(peripheral) {
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+ peripherals.insert(peripheral.to_owned());
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+ }
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+ }
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+ }
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+ println!("{} peripherals:", peripherals.len());
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+ for peripheral in peripherals.iter() {
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+ println!("{}", peripheral);
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+ }
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+
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+ begin_document(&mut writer, &peripherals);
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+ draw_package_body(&mut writer, package);
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+ draw_legend(&mut writer, package, &peripherals);
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+ for pin in mcu.pins.iter() {
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+ draw_pin_label(&mut writer, package, pin, &peripherals);
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+ }
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+ end_document(&mut writer);
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+
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+ drop(writer);
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+ output
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+}
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+
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+fn begin_document(writer: &mut BufWriter<&mut Vec<u8>>, peripherals: &BTreeSet<String>) {
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+ write!(
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+ writer,
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+ "{}",
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+ r#"\documentclass[crop,tikz]{standalone}
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+\usepackage{pgf}
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+\fontsize{10}{12}\selectfont
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+\usetikzlibrary{calc, positioning}
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+\pgfmathsetseed{12345}
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+"#
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+ )
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+ .unwrap();
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+ // Randomly generate colors for all peripherals.
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+ for peripheral in peripherals {
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+ write!(
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+ writer,
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+ "\\pgfmathsetmacro{{\\R}}{{random(0,10000)/10000}}
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+\\pgfmathsetmacro{{\\G}}{{random(0,10000)/10000}}
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+\\pgfmathsetmacro{{\\B}}{{random(0,10000)/10000}}
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+\\definecolor{{color{name}}}{{rgb}}{{\\R,\\G,\\B}}
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+",
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+ name = peripheral
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+ )
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+ .unwrap()
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+ }
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+ write!(
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+ writer,
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+ "{}",
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+ r#"\begin{document}
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+\begin{tikzpicture}[x=12pt,y=12pt]
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+"#
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+ )
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+ .unwrap();
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+}
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+
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+fn end_document(writer: &mut BufWriter<&mut Vec<u8>>) {
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+ write!(
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+ writer,
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+ "{}",
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+ r#"\end{tikzpicture}
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+\end{document}
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+"#
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+ )
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+ .unwrap();
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+}
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+
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+fn draw_package_body(writer: &mut BufWriter<&mut Vec<u8>>, package: Package) {
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+ if let Package::Qfp(pins) = package {
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+ let pins_per_side = package.pins_per_side();
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+ let edge = pins_per_side + 3;
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+ write!(writer, "\\draw[thick] (0, 0) --\n").unwrap();
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+ for i in 0..pins_per_side {
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+ write!(
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+ writer,
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+ " coordinate[pos={pos}] (P{pin})\n",
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+ pos = (i + 2) as f64 / edge as f64,
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+ pin = i + 1,
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+ )
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+ .unwrap();
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+ }
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+ write!(writer, " ({size}, 0);\n", size = edge).unwrap();
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+ write!(writer, "\\draw[thick] ({size}, 0) --\n", size = edge).unwrap();
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+ for i in 0..pins_per_side {
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+ write!(
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+ writer,
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+ " coordinate[pos={pos}] (P{pin})\n",
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+ pos = (i + 2) as f64 / edge as f64,
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+ pin = i + pins_per_side + 1,
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+ )
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+ .unwrap();
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+ }
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+ write!(writer, " ({size}, {size});\n", size = edge).unwrap();
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+ write!(writer, "\\draw[thick] ({size}, {size}) --\n", size = edge).unwrap();
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+ for i in 0..pins_per_side {
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+ write!(
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+ writer,
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+ " coordinate[pos={pos}] (P{pin})\n",
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+ pos = (i + 2) as f64 / edge as f64,
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+ pin = i + pins_per_side * 2 + 1,
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+ )
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+ .unwrap();
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+ }
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+ write!(writer, " (0, {size});\n", size = edge).unwrap();
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+ write!(writer, "\\draw[thick] (0, {size}) --\n", size = edge).unwrap();
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+ for i in 0..pins_per_side {
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+ write!(
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+ writer,
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+ " coordinate[pos={pos}] (P{pin})\n",
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+ pos = (i + 2) as f64 / edge as f64,
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+ pin = i + pins_per_side * 3 + 1,
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+ )
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+ .unwrap();
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+ }
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+ write!(writer, " (0, 0);\n").unwrap();
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+
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+ // Draw pin numbers.
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+ for i in 0..pins {
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+ let side = Side(i / (pins / 4));
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+ write!(
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+ writer,
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+ "\\node[{side} = 0.1 of P{pin}, rotate={rotate}] {{{pin}}};\n",
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+ side = side.inside_position(),
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+ rotate = side.rotate(),
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+ pin = i + 1,
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+ )
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+ .unwrap();
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+ }
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+ } else {
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+ panic!("Not yet implemented.");
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+ }
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+}
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+
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+fn draw_legend(
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+ writer: &mut BufWriter<&mut Vec<u8>>,
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+ package: Package,
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+ peripherals: &BTreeSet<String>,
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+) {
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+ let rows = (package.pins_per_side() as usize - 4) * 2 / 3;
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+ let pos_x = 3;
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+ let pos_y = package.pins_per_side() as f64 - 2.0;
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+ for (i, peripheral) in peripherals.iter().enumerate() {
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+ let column = i / rows;
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+ let row = i % rows;
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+ write!(
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+ writer,
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+ "\\node[draw, fill=color{rawname}!30, anchor=west] at ({x}, {y}) {{{name}}};\n",
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+ x = pos_x + column * 5,
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+ y = pos_y - row as f64 * 1.5,
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+ rawname = peripheral,
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+ name = latex_escape(peripheral),
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+ )
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+ .unwrap();
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+ }
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+}
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+
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+fn draw_pin_label(
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+ writer: &mut BufWriter<&mut Vec<u8>>,
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+ package: Package,
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+ pin: &Pin,
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+ peripherals: &BTreeSet<String>,
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+) {
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+ if let Package::Qfp(pins) = package {
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+ let position = pin.position.parse::<u32>().expect("invalid pin position");
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+ let side = Side((position - 1) / (pins / 4));
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+ write!(
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+ writer,
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+ "\\node[{side} = 0.1 of P{pin}, rotate={rotate}] (p{pin}label0) {{{name}}};\n",
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+ side = side.outside_position(),
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+ rotate = side.rotate(),
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+ //anchor = side.outside_anchor(),
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+ pin = position,
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+ name = latex_escape(&pin.name),
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+ )
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+ .unwrap();
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+
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+ // Draw the functions as well.
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+ // TODO: Ideally, the functions would be grouped together.
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+ let mut label_count = 0;
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+ for function in pin.functions.iter() {
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+ let (peripheral, signal) = Pin::split_function(function);
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+ if !peripherals.contains(peripheral) {
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+ continue;
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+ }
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+ write!(
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+ writer,
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+ "\\node[draw, fill=color{peripheral}!30, {side} = 0.1 of p{pin}label{label_count}, rotate={rotate}] (p{pin}label{label_count_p_1}) {{{name}}};\n",
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+ side = side.outside_position(),
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+ label_count = label_count,
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+ label_count_p_1 = label_count + 1,
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+ rotate = side.rotate(),
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+ //anchor = side.outside_anchor(),
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+ pin = position,
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+ peripheral = peripheral,
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+ name = latex_escape(signal),
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+ )
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+ .unwrap();
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+ label_count += 1;
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+ }
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+ } else {
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+ panic!("Not yet implemented.");
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+ }
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+}
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+
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+#[derive(Copy, Clone)]
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+struct Side(u32);
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+
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+impl Side {
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+ fn inside_anchor(self) -> &'static str {
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+ match self.0 {
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+ 0 => "west",
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+ 1 => "east",
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+ 2 => "east",
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+ 3 => "west",
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+ _ => panic!("invalid side"),
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+ }
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+ }
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+ fn outside_anchor(self) -> &'static str {
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+ Side((self.0 + 2) % 4).inside_anchor()
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+ }
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+ fn rotate(self) -> u32 {
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+ match self.0 {
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+ 0 => 90,
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+ 1 => 0,
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+ 2 => 90,
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+ 3 => 0,
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+ _ => panic!("invalid side"),
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+ }
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+ }
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+ fn inside_position(self) -> &'static str {
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+ match self.0 {
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+ 0 => "right",
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+ 1 => "left",
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+ 2 => "left",
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+ 3 => "right",
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+ _ => panic!("invalid side"),
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+ }
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+ }
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+ fn outside_position(self) -> &'static str {
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+ Side((self.0 + 2) % 4).inside_position()
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+ }
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+}
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+
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+fn latex_escape(s: &str) -> String {
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+ s.replace("_", "\\_")
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+}
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+
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+#[derive(Clone, Copy)]
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+enum Package {
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+ Qfp(u32),
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+ Bga(u32),
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+}
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+
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+impl Package {
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+ fn from_str(s: &str) -> Option<Package> {
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+ if s.starts_with("LQFP") {
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+ let pins = s[4..].parse().ok()?;
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+ Some(Package::Qfp(pins))
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+ } else {
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+ None
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+ }
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+ }
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+
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+ fn pins_per_side(&self) -> u32 {
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286
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+ match self {
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+ Package::Qfp(pins) => pins / 4,
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288
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+ _ => panic!("Not yet implemented."),
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+ }
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+ }
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+ fn pins(&self) -> u32 {
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+ match self {
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+ Package::Qfp(pins) => *pins,
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+ _ => panic!("Not yet implemented."),
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+ }
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+ }
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+}
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Mathias Gottschlag
vor 4 Jahren