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https://github.com/JasonYANG170/logicanalyzer.git
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I2C protocol analyzer
This commit is contained in:
Agustín Gimenez
parent
b28e4865bc
commit
da5bc96d96
BIN
I2CProtocolAnalyzer.dll
Normal file
BIN
I2CProtocolAnalyzer.dll
Normal file
Binary file not shown.
275
Software/LogicAnalyzer/I2CProtocolAnalyzer/I2CAnalyzer.cs
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275
Software/LogicAnalyzer/I2CProtocolAnalyzer/I2CAnalyzer.cs
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@ -0,0 +1,275 @@
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using Avalonia.Input.TextInput;
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using Avalonia.Media;
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using LogicAnalyzer.Protocols;
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using Newtonsoft.Json.Linq;
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using System.Data;
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using System.Text;
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namespace I2CProtocolAnalyzer
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{
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public class I2CAnalyzer : ProtocolAnalyzerBase
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{
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private SimpleSegmentRenderer renderer = new SimpleSegmentRenderer();
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public override string ProtocolName
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{
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get
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{
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return "I2C";
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}
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}
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public override ProtocolAnalyzerSetting[] Settings
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{
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get
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{
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return new ProtocolAnalyzerSetting[0];
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}
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}
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public override ProtocolAnalyzerSignal[] Signals
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{
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get
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{
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return new ProtocolAnalyzerSignal[]
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{
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new ProtocolAnalyzerSignal{ Required = true, SignalName = "SCL" },
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new ProtocolAnalyzerSignal{ Required = true, SignalName = "SDA" },
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};
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}
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}
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public override ProtocolAnalyzedChannel[] Analyze(int SamplingRate, int TriggerSample, ProtocolAnalyzerSettingValue[] SelectedSettings, ProtocolAnalyzerSelectedChannel[] SelectedChannels)
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{
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var scl = SelectedChannels.Where(c => c.SignalName == "SCL").First();
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var sda = SelectedChannels.Where(c => c.SignalName == "SDA").First();
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List<ProtocolAnalyzerDataSegment> segments = new List<ProtocolAnalyzerDataSegment>();
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int startPosition;
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int endPosition;
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byte value;
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bool ack;
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bool frameError;
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bool foundStartStop;
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bool addressByte = true;
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bool address10 = false;
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byte firstAddressByte = 0;
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int pos = FindStartCondition(0, scl, sda, out startPosition, out endPosition);
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if (pos == -1)
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return new ProtocolAnalyzedChannel[0];
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segments.Add(new ProtocolAnalyzerDataSegment { FirstSample = startPosition, LastSample = endPosition, Value = $"START" });
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while (pos < sda.Samples.Length)
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{
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pos = ReadByte(pos, scl, sda, out startPosition, out endPosition, out value, out ack, out frameError);
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if (pos == -1)
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break;
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string asciival = value >= 0x20 && value <= 0x7e ? Encoding.ASCII.GetString(new byte[] { (byte)value }) : "·";
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var segment = new ProtocolAnalyzerDataSegment { FirstSample = startPosition, LastSample = endPosition, Value = $"0x{value.ToString()} '{asciival}' <{(ack ? "A" : "N")}{(frameError ? "F" : "")}>" };
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if (addressByte)
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{
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addressByte = false;
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segment.Value += $"\r\nOp: {((value & 1) == 1 ? "Read" : "Write") }";
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if ((value & 0xf8) == 0xf7)
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{
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address10 = true;
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firstAddressByte = value;
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}
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else
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segment.Value += $"\r\nAddress (7b): 0x{(value >> 1).ToString("X2")}";
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}
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else if (address10)
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{
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address10 = false;
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segment.Value += $"\r\nAddress (10b): {(((firstAddressByte & 6) << 7) | value).ToString("X4")}";
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}
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segments.Add(segment);
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bool isStart;
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pos = FindStartStopCondition(pos, scl, sda, out isStart, out startPosition, out endPosition, out foundStartStop);
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if (pos == -1)
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break;
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if(foundStartStop)
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segments.Add(new ProtocolAnalyzerDataSegment { FirstSample = startPosition, LastSample = endPosition, Value = isStart ? "START" : "STOP" });
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if (foundStartStop && !isStart)
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{
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pos = FindStartCondition(pos, scl, sda, out startPosition, out endPosition);
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if (pos == -1)
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break;
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segments.Add(new ProtocolAnalyzerDataSegment { FirstSample = startPosition, LastSample = endPosition, Value = $"START" });
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addressByte = true;
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}
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}
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ProtocolAnalyzedChannel channel = new ProtocolAnalyzedChannel("SDA", sda.ChannelIndex, renderer, segments.ToArray(), Colors.White, Color.FromUInt32(0x7f008b8b));
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return new ProtocolAnalyzedChannel[] { channel };
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}
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private int FindStartStopCondition(int pos, ProtocolAnalyzerSelectedChannel scl, ProtocolAnalyzerSelectedChannel sda, out bool isStart, out int startPosition, out int endPosition, out bool found)
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{
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int initialPosition = pos;
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isStart = false;
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startPosition = 0;
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endPosition = 0;
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found = false;
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while (pos < scl.Samples.Length && scl.Samples[pos] != 1)
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pos++;
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if (pos >= scl.Samples.Length)
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return -1;
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startPosition = pos;
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byte val = sda.Samples[pos];
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//Initial state will indicate if this may be an start or an stop
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isStart = val == 1;
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1)
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{
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if (val != sda.Samples[pos])
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{
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found = true;
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break;
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}
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pos++;
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}
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if (pos >= scl.Samples.Length)
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return -1;
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if (!found)
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return initialPosition;
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endPosition = pos - 1;
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return pos;
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}
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private int FindStartCondition(int pos, ProtocolAnalyzerSelectedChannel scl, ProtocolAnalyzerSelectedChannel sda, out int startPosition, out int endPosition)
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{
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startPosition = 0; endPosition = 0;
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while (pos < scl.Samples.Length)
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{
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while (pos < scl.Samples.Length && scl.Samples[pos] != 1)
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pos++;
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if (pos >= scl.Samples.Length)
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return -1;
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startPosition = pos;
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bool foundStart = false;
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if (scl.Samples[pos] != 1) //SDA is low, it cannot be a start
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{
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1)
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pos++;
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if (pos >= scl.Samples.Length)
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return -1;
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}
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else
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{
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1)
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{
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if (sda.Samples[pos] != 1)
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{
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foundStart = true;
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break;
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}
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pos++;
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}
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}
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if (foundStart)
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{
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endPosition = pos - 1;
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return pos;
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}
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}
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return -1;
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}
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private int ReadByte(int pos, ProtocolAnalyzerSelectedChannel scl, ProtocolAnalyzerSelectedChannel sda, out int byteStart, out int byteEnd, out byte value, out bool ack, out bool frameError)
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{
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byteStart = 0; byteEnd = 0; value = 0; ack = false; frameError= false;
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1) //Find next low clock
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pos++;
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if (pos >= scl.Samples.Length) //
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return -1;
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byteStart = pos;
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for (int buc = 0; buc < 9; buc++)
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{
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1) //Find next low clock
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pos++;
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while (pos < scl.Samples.Length && scl.Samples[pos] == 0) //Find high clock
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pos++;
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if (pos >= scl.Samples.Length) //
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return -1;
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byte sampleValue = sda.Samples[pos];
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if (buc < 8)
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{
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value |= (byte)(sampleValue << (7 - buc)); //Get the value
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}
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else
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ack = sampleValue == 0; //Get the ACK/NACK
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//Check for frame errors, any change of SDA while SCL is high and is in the middle
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//of a byte is a frame error, SDA can change only while the bus is idle or at the end of a byte
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//indicating a start or a stop
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while (pos < scl.Samples.Length && scl.Samples[pos] == 1)
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{
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if (sda.Samples[pos] != sampleValue)
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frameError = true;
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pos++;
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}
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}
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byteEnd = pos - 1;
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return pos;
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}
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public override bool ValidateSettings(ProtocolAnalyzerSettingValue[] SelectedSettings, ProtocolAnalyzerSelectedChannel[] SelectedChannels)
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{
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if (SelectedChannels == null || SelectedChannels.Length != 2)
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return false;
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return true;
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}
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}
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}
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@ -0,0 +1,13 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\LogicAnalyzer\LogicAnalyzer.csproj" />
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</ItemGroup>
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</Project>
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@ -11,7 +11,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LogicAnalyzer", "LogicAnaly
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SPIProtocolAnalyzer", "SPIProtocolAnalyzer\SPIProtocolAnalyzer.csproj", "{6F18CFDA-7596-47F7-ABB9-AB09DC003C0B}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SerialProtocolAnalyzer", "SerialProtocolAnalyzer\SerialProtocolAnalyzer.csproj", "{E71855EA-04A7-48C1-860A-6A85E9D9E727}"
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SerialProtocolAnalyzer", "SerialProtocolAnalyzer\SerialProtocolAnalyzer.csproj", "{E71855EA-04A7-48C1-860A-6A85E9D9E727}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "I2CProtocolAnalyzer", "I2CProtocolAnalyzer\I2CProtocolAnalyzer.csproj", "{74E41F50-E208-4690-84C6-51012C2F26E2}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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@ -39,6 +41,10 @@ Global
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{E71855EA-04A7-48C1-860A-6A85E9D9E727}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{E71855EA-04A7-48C1-860A-6A85E9D9E727}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{E71855EA-04A7-48C1-860A-6A85E9D9E727}.Release|Any CPU.Build.0 = Release|Any CPU
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{74E41F50-E208-4690-84C6-51012C2F26E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{74E41F50-E208-4690-84C6-51012C2F26E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{74E41F50-E208-4690-84C6-51012C2F26E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{74E41F50-E208-4690-84C6-51012C2F26E2}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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@ -166,7 +166,7 @@ namespace SPIProtocolAnalyzer
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string asciival = value >= 0x20 && value <= 0x7e ? Encoding.ASCII.GetString(new byte[] { (byte)value }) : "·";
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ProtocolAnalyzerDataSegment segment = new ProtocolAnalyzerDataSegment { FirstSample = range.FirstSample + firstClockSample, LastSample = range.FirstSample + lastSample, Value = $"0x{value.ToString("X2")} (\"{asciival}\")" };
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ProtocolAnalyzerDataSegment segment = new ProtocolAnalyzerDataSegment { FirstSample = range.FirstSample + firstClockSample, LastSample = range.FirstSample + lastSample, Value = $"0x{value.ToString("X2")} '{asciival}'" };
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segments.Add(segment);
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firstClockSample = FindSample(lastSample, clockRange, cpha == 0 ? 1 : 0);
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@ -171,8 +171,10 @@ namespace SerialProtocolAnalyzer
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int endPos = (int)Math.Round(samplePos, 0);
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string asciival = value >= 0x20 && value <= 0x7e ? Encoding.ASCII.GetString(new byte[] { (byte)value }) : "·";
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ProtocolAnalyzerDataSegment newSegment = new ProtocolAnalyzerDataSegment();
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newSegment.Value = "0x" + value.ToString("X2") + "-'" + Encoding.ASCII.GetString(new byte[] { value }) + "'";
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newSegment.Value = $"0x{value.ToString("X2")} '{asciival}'";
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newSegment.FirstSample = startPos;
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newSegment.LastSample = endPos;
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string errors = "";
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