HeartBeatRate/Software/dashboard/lib/main.dart

import 'package:flutter/material.dart';
import 'util/mouse_cursor.dart';
import 'package:dart_periphery/dart_periphery.dart';
import 'dart:io';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return SoftwareMouseCursor( 
        child : MaterialApp(
          title: 'Heart Beat Mice',
          theme: ThemeData(
            colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
            useMaterial3: true,
            ),
          home: const MyHomePage(title: 'Heart Beat Mice'),
          )
        );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  var config, gpio, spi;

  @override
  void initState(){
      super.initState();
      spi = SPI(1, 0, SPImode.mode0, 100000);
      config = GPIOconfig.defaultValues();
      config.direction = GPIOdirection.gpioDirOut;
      gpio = GPIO(2, GPIOdirection.gpioDirOut, 1);
      print("SPI info: ${spi.getSPIinfo()}");
    }

  @override
  void dispose(){
      super.dispose();
      gpio.dispose();
      spi.dispose();
    }

  void _incrementCounter() {
    setState(() {
        _counter++;
        });
    gpio.write(_counter.isOdd);
    spi.transfer([0, 1, 2, 3, 4, 5, 6, 7], false);
    print("gpio.write : $_counter.isOdd");
  }

  @override
    Widget build(BuildContext context) {
      return Scaffold(
          appBar: AppBar(
            backgroundColor: Theme.of(context).colorScheme.inversePrimary,
            title: Text(widget.title),
            ),
          body: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
              const Text(
                'You have pushed the button this many times:',
                ),
              Text(
                '$_counter',
                style: Theme.of(context).textTheme.headlineMedium,
                ),
              ],
              ),
            ),
          floatingActionButton: FloatingActionButton(
            onPressed: _incrementCounter,
            tooltip: 'Increment',
            child: const Icon(Icons.add),
            ), 
          );
    }
}