289 lines
7.2 KiB
Dart
289 lines
7.2 KiB
Dart
import 'dart:typed_data';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:hvbt_dash/core/protocol/neg8.dart';
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import 'package:hvbt_dash/core/protocol/s300_parser.dart';
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import 'package:hvbt_dash/core/protocol/temp_table.dart';
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/// Builds a zeroed 128-byte S300 frame and stamps the NEG8 checksum at byte 127.
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Uint8List _buildS300Frame({
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int rpm = 0,
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int vss = 0,
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int mapRaw = 0,
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int tps = 0,
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int inj = 0,
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int ign = 0,
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int ect = 0x80, // tempXlt[0x80]=73 → 73+40=113°C
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int bat = 0,
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int sw1 = 0,
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int sw2 = 0,
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int sw3 = 0,
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int krtrd = 0,
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}) {
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final frame = Uint8List(128);
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// Header
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frame[0] = 0x1B;
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frame[1] = 0x00;
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// RPM: bytes 2..3, raw stream is display RPM + 256
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final rpmRaw = rpm + 256;
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frame[2] = (rpmRaw >> 8) & 0xFF;
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frame[3] = rpmRaw & 0xFF;
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// VSS: bytes 5..6 little-endian
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frame[5] = vss & 0xFF;
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frame[6] = (vss >> 8) & 0xFF;
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// MAP: bytes 7..8 little-endian
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frame[7] = mapRaw & 0xFF;
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frame[8] = (mapRaw >> 8) & 0xFF;
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// TPS: byte 9
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frame[9] = tps;
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// INJ: bytes 10..11 little-endian
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frame[10] = inj & 0xFF;
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frame[11] = (inj >> 8) & 0xFF;
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// IGN: byte 12
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frame[12] = ign;
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// KRtrd: byte 13
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frame[13] = krtrd;
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// SW bitmaps
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frame[0x11] = sw1;
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frame[0x12] = sw2;
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frame[0x13] = sw3;
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// ECT: byte 0x2D
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frame[0x2D] = ect;
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// BAT: byte 0x24
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frame[0x24] = bat;
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// Stamp NEG8 checksum at byte 127
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int neg8 = 0;
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for (int i = 0; i < 127; i++) {
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neg8 = (neg8 - frame[i]) & 0xFF;
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}
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frame[127] = neg8;
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return frame;
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}
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void main() {
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group('S300 parser', () {
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test('parses RPM correctly', () {
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// RPM raw = 3000
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final frame = _buildS300Frame(rpm: 3000);
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final state = parseS300(frame);
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expect(state.rpm, equals(3000.0));
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});
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test('parses VSS = 0 when raw < 893', () {
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final frame = _buildS300Frame(vss: 500);
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final state = parseS300(frame);
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expect(state.vss, equals(0.0));
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});
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test('parses VSS correctly when raw >= 893', () {
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// vss = 144256 / 1000 = 144.256 mph
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final frame = _buildS300Frame(vss: 1000);
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final state = parseS300(frame);
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expect(state.vss, closeTo(144.26, 0.01));
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});
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test('parses MAP as SManager-style psi', () {
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// mapRaw = 1148 -> 114.8 kPa absolute -> about 1.6 psi displayed
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final frame = _buildS300Frame(mapRaw: 1148);
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final state = parseS300(frame);
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expect(state.map, closeTo(1.6, 0.01));
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});
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test('parses TPS = 0 when raw < 25', () {
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final frame = _buildS300Frame(tps: 10);
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final state = parseS300(frame);
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expect(state.tps, equals(0.0));
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});
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test('parses TPS correctly when raw >= 25', () {
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// tps raw=134 -> approximately 51%
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final frame = _buildS300Frame(tps: 134);
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final state = parseS300(frame);
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expect(state.tps, closeTo(50.93, 0.01));
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});
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test('parses ECT using temp lookup table', () {
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// ect raw = 0x80 = 128 → tempXlt[128]=73 → 73+40=113°C
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final frame = _buildS300Frame(ect: 0x80);
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final state = parseS300(frame);
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expect(state.ect, equals((tempXlt[0x80] + 40).toDouble()));
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});
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test('parses BAT = raw * 26 / 270', () {
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// bat raw = 135 → 135*26/270 = 13.0 V
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final frame = _buildS300Frame(bat: 135);
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final state = parseS300(frame);
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expect(state.bat, closeTo(13.0, 0.01));
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});
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test('IGN decode: (raw + 120) / 2', () {
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// ign raw = 164 -> 49.0°
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final frame = _buildS300Frame(ign: 164);
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final state = parseS300(frame);
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expect(state.ign, equals(49.0));
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});
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test('MIL flag set from SW2 bit5', () {
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final frame = _buildS300Frame(sw2: 0x20); // bit5 set
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final state = parseS300(frame);
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expect(state.mil, isTrue);
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});
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test('knock flag set when krtrd > 0', () {
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final frame = _buildS300Frame(krtrd: 5);
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final state = parseS300(frame);
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expect(state.knock, isTrue);
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});
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test('knock flag clear when krtrd = 0', () {
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final frame = _buildS300Frame(krtrd: 0);
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final state = parseS300(frame);
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expect(state.knock, isFalse);
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});
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test('throws on wrong frame length', () {
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expect(
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() => parseS300(Uint8List(64)),
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throwsArgumentError,
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);
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});
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test('throws on bad checksum', () {
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final frame = _buildS300Frame(rpm: 1000);
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frame[127] = 0x00; // corrupt checksum
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expect(() => parseS300(frame), throwsArgumentError);
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});
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test('can parse bad checksum frame when validation is disabled', () {
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final frame = _buildS300Frame(rpm: 1000);
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frame[127] = 0x00; // corrupt checksum
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final state = parseS300(frame, validateChecksum: false);
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expect(state.rpm, equals(1000.0));
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});
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test('detects known S300 prefix signature', () {
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final frame = Uint8List(128);
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final signature = [
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0x1B,
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0x00,
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0x14,
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0x00,
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0x00,
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0xFF,
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0xFF,
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0xF2,
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0x03,
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0x18,
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0x00,
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0x00,
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0x10,
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0x00,
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0x00,
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0x00,
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0xC4,
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];
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for (var i = 0; i < signature.length; i++) {
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frame[i] = signature[i];
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}
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frame[127] = calculateNeg8(frame.sublist(0, 127));
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expect(isS300PlaceholderFrame(frame), isTrue);
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});
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test('uses calibrated tail payload RPM at offset 82', () {
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final frame = Uint8List(128);
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final prefix = [
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0x1B,
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0x00,
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0x14,
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0x00,
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0x00,
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0xFF,
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0xFF,
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0xF2,
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0x03,
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0x18,
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0x00,
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0x00,
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0x10,
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0x00,
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0x00,
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0x00,
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0xC4,
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];
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for (var i = 0; i < prefix.length; i++) {
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frame[i] = prefix[i];
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}
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frame[82] = 0x32;
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frame[83] = 0x0C;
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frame[127] = calculateNeg8(frame.sublist(0, 127));
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final state = parseS300(frame);
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expect(state.rpm, equals(2033.0));
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});
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test('uses calibrated tail payload RPM at offset 86', () {
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final frame = Uint8List(128);
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final prefix = [
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0x1B,
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0x00,
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0x14,
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0x00,
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0x00,
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0xFF,
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0xFF,
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0xF2,
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0x03,
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0x18,
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0x00,
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0x00,
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0x10,
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0x00,
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0x00,
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0x00,
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0xC4,
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];
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for (var i = 0; i < prefix.length; i++) {
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frame[i] = prefix[i];
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}
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frame[86] = 0x31;
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frame[87] = 0x0C;
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frame[127] = calculateNeg8(frame.sublist(0, 127));
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expect(hasS300TailRpmPayload(frame), isTrue);
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final state = parseS300(frame);
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expect(state.rpm, equals(2032.0));
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});
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test('detects empty S300 Bluetooth prefix frames', () {
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final frame = Uint8List(128);
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final prefix = [
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0x1B,
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0x00,
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0x14,
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0x00,
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0x00,
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0xFF,
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0xFF,
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0xF2,
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0x03,
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0x18,
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0x00,
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0x00,
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0x10,
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0x00,
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0x00,
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0x00,
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0xC4,
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];
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for (var i = 0; i < prefix.length; i++) {
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frame[i] = prefix[i];
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}
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frame[127] = calculateNeg8(frame.sublist(0, 127));
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expect(isS300PlaceholderFrame(frame), isTrue);
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expect(hasS300TailRpmPayload(frame), isFalse);
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});
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});
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}
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