介紹

嵌入式系統(tǒng)開發(fā)中，燒錄是一個至關(guān)重要的環(huán)節(jié)。然而，長期以來，我們發(fā)現(xiàn)國產(chǎn)芯片現(xiàn)有的燒錄工具在跨平臺方面存在著一些不便之處。對于Synwit單片機而言， 暫時沒發(fā)現(xiàn)在Mac平臺上有合適的燒錄工具。因此，我們決定著手在Mac下開發(fā)一個全新的上位機工具，簡化燒錄過程，提高開發(fā)效率，并為Synwit單片機的使用者提供更多的選擇。為了實現(xiàn)這一目標，我們選擇了Rust作為主要開發(fā)語言，并借助Slint語言設(shè)計界面。 

在這個項目中，我們將結(jié)合Rust的內(nèi)存安全和高性能優(yōu)勢，Slint優(yōu)雅的聲明式語言設(shè)計UI，來快速打造一個簡單、易于使用的燒錄工具，為嵌入式開發(fā)者帶來便利。接下來，我將分享部分Rust代碼和Slint界面代碼，探討這個項目的開發(fā)過程和功能特點。 

Rust后臺部分代碼如下：

let lister = Lister::new();
let ui_weak = ui.as_weak();

ui.on_flash(move |probe, chip, file| {
    let ui = ui_weak.unwrap();
    let p = PROBES.lock().unwrap();
    let pb = p.get(probe as usize).unwrap().clone();
    let probe = pb.open(&lister);

    let probe = if let Ok(probe) = probe {
        probe
    } else {
        log::info!("open fail");
        return;
    };

    let mut session = probe
        .attach(String::from(chip).as_str(), Permissions::default())
        .unwrap();
    let flash_process = flashing::FlashProgress::new(move |e| match e {
        flashing::ProgressEvent::Initialized { flash_layout: _ } => {
            ui.invoke_print_log("Initialized".into());
        }
        flashing::ProgressEvent::FinishedProgramming => {
            let cnt = ui.get_success_cnt() + 1;
            ui.set_success_cnt(cnt);
        }
        flashing::ProgressEvent::FailedErasing
            | flashing::ProgressEvent::FailedProgramming => {
                let cnt = ui.get_fail_cnt() + 1;
                ui.set_fail_cnt(cnt);
            }
        _a => ui.invoke_print_log(format!("{:?}", _a).into()),
    });
    let mut download_options = flashing::DownloadOptions::default();
    download_options.verify = true;
    download_options.progress = Some(flash_process);
    let _ = flashing::download_file_with_options(
        &mut session,
        String::from(file).as_str(),
        flashing::Format::Elf,
        download_options,
    )
        .inspect_err(|e| {
            log::error!("error: {}", e);
        });
});

界面Slint代碼如下：

import { Button, VerticalBox , HorizontalBox, CheckBox, GroupBox} from "std-widgets.slint";
import { FileTextEdit } from "component/FileTextEdit.slint";
import { TitleComBox } from "component/TitleComBox.slint";
import { TextEdit } from "component/TextEdit.slint";

export struct Vender {
    name: string,
    chip: [string],
}

export component AppWindow inherits Window {
    title: @tr("MCU Flash@Hysonglet");
    in-out property <[Vender]> chip_set : [];
    in-out property success_cnt;
    in property  fail_cnt;
    in-out property  firmware;
    in property  firmware_detail;
    in property <[string]> probe_list: [
        @tr("first"),
        @tr("second")
    ];
    in property <[string]> vender_list: [
    ];
    in property <[string]> chip_list: [];
    callback flash(int, string, string);
    pure callback firmware_ready() -> bool;
    pure callback process() -> int;

    public function clear_log() {
        log.clear()
    }
    public function print_log(txt: string) {
        log.print(txt);
    } 

    height: 480px;
    width: 720px;
    HorizontalBox {
        alignment: LayoutAlignment.space-between;

        left := VerticalBox {
            alignment: LayoutAlignment.space-around;
            spacing: 0px;
            file_text_edit := FileTextEdit {
                width: 210px;
                height: 180px;
                process: root.process()*1.0/100.0;
                firmware <=> root.firmware;
                file_detail: firmware_detail;
            }
            probe := TitleComBox {
                title: @tr("Probe");
                model: root.probe_list;
            }
            vender:= TitleComBox {
                title: @tr("Vender");
                model: root.vender-list;
            }
            chip:= TitleComBox {
                title: @tr("Chip");
                model: root.chip_set[vender.current_index].chip;
            }

            Button {
                text: @tr("Flash");

                clicked => {
                    flash(probe.current_index, chip.current_value, root.firmware);
                }
                enabled: firmware_ready();
            }
        }

        VerticalBox {
            width: 450px;
            log := TextEdit {
                height: parent.height/1.2;
            }

            HorizontalBox {
                height: 45px;
                alignment: space-between;
                Button {
                    text: @tr("Success:") + root.success_cnt;
                }
                Button {
                    text: @tr("Fail: ") + root.fail_cnt;
                }
                Button {
                    text: @tr("Clear");
                    clicked => {
                        log.clear()
                    }
                }
            }
        }
    }
}

Rust后臺控制Jlink或CMISI-DAP工具，采用SWD協(xié)議，只需連接SWM341的SWC、SWIO、GND、VCC即可下載。

通過這個項目的開發(fā)，我深刻體會到了Rust語言的強大之處，其內(nèi)存安全和高性能，為本項目提供了堅實的基礎(chǔ)。同時，使用slint設(shè)計界面，快速實現(xiàn)界面的定制，非常便捷優(yōu)雅。

工具界面