Add timeout detect

Add the frame timeout detect.
TiferKing · Jan 3, 2023 · be1af9a · be1af9a
1 parent 079506d
commit be1af9a
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Showing 2 changed files with 17 additions and 2 deletions.
diff --git a/SWIMAnalyzer/SWIMAnalyzer.cpp b/SWIMAnalyzer/SWIMAnalyzer.cpp
@@ -149,6 +149,8 @@ void SWIMAnalyzer::SetupSample()
     {
         mLowSpeedSampleOffsets.push_back(clk_gen.AdvanceByHalfPeriod());
     }
+
+    mTimeoutSampleNum = clk_gen.AdvanceByTimeS(5e-4); // Set bit timeout 0.5ms
 }
 
 void SWIMAnalyzer::ParseSWIM(bool is_high_speed)
@@ -457,7 +459,11 @@ BitState SWIMAnalyzer::ParseBit(bool is_high_speed)
         }
     }
 
-    mSWIM->AdvanceToNextEdge();
+    if ((mSWIM->GetSampleOfNextEdge() - mSWIM->GetSampleNumber()) < mTimeoutSampleNum)
+    {
+        // Next bit present
+        mSWIM->AdvanceToNextEdge();
+    }
     return bit;
 }
 
@@ -469,7 +475,15 @@ BitState SWIMAnalyzer::ParseACK(bool is_high_speed)
 
     if (mSWIM->GetBitState() == BIT_HIGH)
     {
-        mSWIM->AdvanceToNextEdge();
+        if ((mSWIM->GetSampleOfNextEdge() - mSWIM->GetSampleNumber()) < mTimeoutSampleNum)
+        {
+            mSWIM->AdvanceToNextEdge();
+        }
+        else
+        {
+            // ACK edge not present
+            return BIT_LOW;
+        }
     }
     U64 starting_sample = mSWIM->GetSampleNumber();
 

diff --git a/SWIMAnalyzer/SWIMAnalyzer.h b/SWIMAnalyzer/SWIMAnalyzer.h
@@ -63,6 +63,7 @@ class ANALYZER_EXPORT SWIMAnalyzer : public Analyzer
     U64 mCurrentSample;
     std::vector<U32> mHighSpeedSampleOffsets;
     std::vector<U32> mLowSpeedSampleOffsets;
+    U32 mTimeoutSampleNum;
 
 #pragma warning( pop )
 };