rpi_spi 0.4.0

rpi_spi is a Dart library for using SPI on the Raspberry Pi.

example/example.dart

import 'dart:async';

import 'package:rpi_spi/rpi_spi.dart';

import 'mcp3008.dart';

void main() async {
  final spi = RpiSpi();
  await readSensor(Mcp3008(spi, 0, 24));
  spi.dispose();
}

Future readSensor(Mcp3008 mcp3008) async {
  StringBuffer out;
  print('Read analog values from MCP3008 channels 0 - 7:');

  print('      | Channel');
  out = StringBuffer('      ');
  for (var channel = 0; channel < 8; ++channel) {
    out.write('| ${channel.toString().padLeft(4)} ');
  }
  print(out.toString());
  print('-' * 63);

  for (var count = 1; count <= 10; ++count) {
    await Future.delayed(const Duration(seconds: 1));
    out = StringBuffer(' ${count.toString().padLeft(4)} ');
    for (var channel = 0; channel < 8; ++channel) {
      var value = mcp3008.read(channel);
      out.write('| ${value.toString().padLeft(4)} ');
    }
    print(out.toString());
    await Future.delayed(Duration(milliseconds: 10));
  }
}