Hey there! Let's break down your two questions step by step since you're new to CANoe and CAPL programming—this stuff can feel tricky at first, but we'll get it sorted.

CAPL doesn't have a dedicated "No Response" function out of the box, but you can easily replicate this behavior by checking for message timeouts. The key function here is testWaitForMessage(), which waits for a specific CAN message within a set time window. If the message doesn't arrive before the timeout expires, you can treat that as a "no response" scenario.

Here's a quick CAPL code example to illustrate this:

variables
{
  // Define your request and expected response messages
  message 0x123 RequestMsg;
  message 0x456 ExpectedResponseMsg;
}

testcase VerifyNoResponse()
{
  // Send the request message
  output(RequestMsg);
  
  // Wait 1000ms for the response—adjust timeout to match your network's timing
  if(testWaitForMessage(ExpectedResponseMsg, 1000) == 0)
  {
    write("✅ No response received within timeout window");
    testPass(); // Mark test as passed if no response
  }
  else
  {
    write("❌ Unexpected response received");
    testFail(); // Mark test as failed if response comes in
  }
}

When testWaitForMessage() returns 0, that means the timeout was hit and no response was received—exactly the "no response" condition you're looking for.

VTESTSTUDIO gives you two straightforward ways to build this logic, depending on whether you prefer using CAPL or the built-in test actions:

Option 1: Use Built-in VTESTSTUDIO Actions (No CAPL required) #

This is the simplest approach for beginners:

• Add a Send CAN Message action to your test case, configure it to send your request message.
• Add a Wait for CAN Message action, set it to look for your expected response message.
• In the action's settings:
  • Set the Timeout value to match your network's expected response latency (e.g., 1000ms).
  • Under On Timeout, select Set Test Case to Pass.
  • Under On Message Received, select Set Test Case to Fail.

That's it—VTESTSTUDIO will automatically handle the pass/fail logic based on whether the response arrives within the timeout.

Option 2: Use a CAPL Test Node #

If you want more control (or need to add custom logic), you can embed the CAPL code from Question 1 into a CAPL Test Node in VTESTSTUDIO:

• Add a CAPL Test Node to your test case.
• Paste the CAPL code snippet above into the node's editor.
• VTESTSTUDIO will respect the testPass() and testFail() calls from the CAPL code to determine the test case outcome.

A quick pro tip: Always test your timeout value with your actual CAN network—too short and you might get false "no response" results, too long and your tests will run slower than needed.

内容的提问来源于stack exchange，提问作者Santhoshel