The replay block of canoe still needs to be combined with CAPL script to make it clear

Related articles

• Learn from scratch CANoe A summary of the contents of the series of articles , Click the jump

• This chapter demonstrates the source code download , Click the jump

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Preface

• Trace logging Documents are important data for us to analyze problems , I said that before ,CANoe There are many analysis tools , what data,graphics etc. , But the most convenient way to analyze problems in daily work is Trace.

• But when playing back the match online , It is not possible to play back the selected file directly , You also need to filter the files as necessary

• The whole network feels that this knowledge point is taking notes , There is no union CAPL And the actual project , But I think this is very necessary

• Demonstrate hardware and software environment Win10 x64 ; CANoe 11 SP2 x64

• This chapter demonstrates the source code download , Click the jump

First record a paragraph Trace spare

1️⃣ Create project first , And then create a logging block, Let's record a segment first logging file

• Here, select the button to trigger to start recording
• Recording file format selection blf Format , This format is better than ASC Format saves memory

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2️⃣ Press down ‘t ’ Start recording , Almost recorded 3 minute , Press again ‘t’ Stop recording

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offline mode load logging File analysis `trace（ Fast mode ）

1️⃣ We have recorded above logging , So let's see how to use this logging To analyze the problem

• Method 1 ： Directly press and hold the file and drag it Trace Inside , It will be loaded soon , The most convenient and fast , Recommended use

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2️⃣ By hitting offline mode, Then drag the file into the selection box , Then press Start Button , It will also be loaded soon , It takes so much time , And drag directly to Trace What's the difference between

1. adopt offline mode Dialog box , You can select multiple files to play back at the same time
2. See that step The button is not , There is also a time input box behind , What does that mean , Namely , If I don't want to read it all at once , I want to read first 5ms The data of , It's over , I press again step , It loads again 5s The data of . Get it. , According to the time you set , Every time you press step, Just load how much data
3. The default unit of time frame ms , You can write h, m, s, To represent hours , minute , second , such as 1s, You can Write 1s

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Data playback (Replay Block)( Slow mode )

The default configuration ,Run 了 CANoe It triggers Replay Block

1️⃣ Here's the picture ,Replay Block It's a node , Here we shield all other nodes , Create a Replay Block node

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2️⃣ Here we choose directly logging file , Don't configure others

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3️⃣ direct Start , Let's take a look at Run 了 156s, Trace It stopped.

• Why above 156s It stops , Because we record Trcae Just 156s , When you play back , The timestamp starts from zero .
• And the default choice is logging The file is played back only once , You can choose loop playback

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Manual trigger Replay Block

• Start Option Don't check Start replay on measurement start

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• Want to trigger Replay , Need to click Start Just press the key

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Key trigger Replay Block

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Repeat playback Replay

• Repeat playback Replay

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Filter channel （Channel Mapping）

• The following figure is based on reality ECU, double CAN A section of channel test Trace Screenshot , Playback select two channels
  、
  

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• The following figure is based on reality ECU, double CAN A section of channel test Trace Screenshot , Playback all options CAN1 passageway

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RX/TX Filter （CAN Option）

• With CAN Bus as an example , Other bus references help file
• No matter recording Trace when , At each node RX still TX; Playback of Trace All are TX
• If you check the RX message , Only the data of the real node is played back , That is to say, recording Trace At the time of the TX Node data is filtered
• If you check the TX message , The data of real nodes and simulation nodes will be played back , That is to say TX message Is to playback all the data

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CAPL Script triggers Replay

• The following script is to control Replay Start , Stop several functions , In actual engineering projects , Basically all through CAPL Script control Replay To complete the test task

/*@!Encoding:936*/

variables
{
    
char replayName[32] = "ReplayBlock 1";
}

on key 'b'
{
    
replayStart( replayName);
writeReplayState( replayName);
}

on key 'e'
{
    
replayStop( replayName);
writeReplayState( replayName);
}

on key 's'
{
    
replaySuspend( replayName);
writeReplayState( replayName);
}

on key 'r'
{
    
replayResume( replayName);
writeReplayState( replayName);
}


void writeReplayState( char name[])
{
    
switch ( replayState( name))
{
    
case 0:
   write( "Replay Block %s is stopped", replayName);
   break;
case 1:
   write( "Replay Block %s is running", replayName);
   break;
case 2:
   write( "Replay Block %s is suspended", replayName);
   break;
default:
write( "Error: Replay Block %s has an unknown state!", replayName);
   break;
};
}

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Node filtering during data playback

• In actual projects , Whether it's the data from the vehicle test or not , Or bench test data , All need data cleaning to be used for playback and analysis , The functions described above are not enough , Even rarely used
• The data from the vehicle test will definitely contain the target ECU Of , Playback process , We have to kick the target ECU The data of , There are roughly two common methods ,
• One is if ASC Formatted data （blf It can also be changed to ASC）, Yes, you can use scripts （Python /c++ etc. ） Clean the file , The specific project has realized
• The other is when replaying messages , Record another message , Add filter nodes during recording , The following code demonstrates this method

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1, Here's the picture , We created Logging Block And join in Event Filter

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2, Here's the picture , This Trace There are only two nodes in total （Light and Engine）, Then we'll put Engine Node data is filtered

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3, Here's the picture , Let's configure logging Trigger mode , For the sake of unity Replay Block and Logging Block And stop at the same time , Let's write a little CAPL Timing under script control , In fact, this is also the general practice in actual engineering projects （ Simplify the code here , Tell the core logic ）

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4, Here's the picture , By pressing the key ‘h’

/*@!Encoding:936*/

variables
{
    
  char replayName[32] = "ReplayBlock 1";
  char loggingName[32] = "Logging";
  msTimer ReplayState ;
}

on timer ReplayState
{
      
  if(replayState(replayName) == 0)//replay end 
  {
    
      stopLogging(loggingName);// stop it logging
  } 
  else
  {
    
      setTimer(ReplayState,100); //100ms
  }
}


on key 'h'
{
    
  replayStart( replayName);  // Start playback 
  setTimer(ReplayState,100); //100ms
  startLogging(loggingName); // Start recording 
}

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5, Run After starting the project , Press the button ‘h’, And then wait Run complete , See the recorded logging -2022xxx file . Drag directly to Trace in , See we put Engine Node messages are filtered out , Then this message , Can be used for our Replay Block

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Logging File Type conversion

• blf File format , It takes up a small amount of memory but cannot be used txt open , You can't use scripts to parse
• asc File format , Large memory consumption , But you can use txt Open it directly , Then delete or change some node data of the file as required
• CANoe You can directly logging File format conversion

End

summary

It needs to be used in the demonstration demo engineering , You can follow the official account online disk below to get it by yourself , Thank you for reading .

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