Interpreters Document


Typical Interpreter Line: (all Action and Goto fields are hex numbers)



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dps Interpreters

Typical Interpreter Line: (all Action and Goto fields are hex numbers) 
Step 
Op-Code 
Action Fields
Goto Fields 
2E 
14 
FF 00 00 00 
54 2F FF 33 00 00 00 00 00 00 
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Page
115 
20 Op-Code: SR 20 to Stop Diagnostic Session 
 
Supported By:
KWP2000 Interpreter 2
 
 
Description: 
The 20 Op-Code is used to stop a programming diagnostic session. 
Action Fields: 
AC0: $00 - Not used
AC1: $00 - Not used
AC2: $00 - Not used
AC3: Exceptions: $00 - Not used
Pseudo Code: 
XX 20 AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
Use KWP2000 Normal Response processing
Build Stop Diagnostic Session Request as indicated in the table below 
Request 
Byte 
Value 
Byte Description 

80 
Format byte for physical addressing 

## 
Global target byte 

## 
Global source byte 

01 
Length of request from byte 5 up to checksum (not included) 

20 
Start routine by local ID request service ID

CS 
1 byte message checksum 
Calculate checksum and copy into service request (byte 6) 
Send Stop Diagnostic Session Request and receive response (up to 10 Bytes) 
Goto KWP2000 Response Processing
If Stop Diagnostic Session positive response is received 
Switch to default baud rate (10400Bd)
Look for Stop Diagnostic Session positive response service ID ($60) in goto fields 
Else
Look for Stop Diagnostic Session negative response, response code in goto fields 
Endif
If found
Goto appropriate step
Else 
Goto step indicated by FF goto field 
Endif 

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