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 
10 
39 
02 00 00 00 
79 11 10 0D FF 99 00 00 00 00 
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131 
3A Op-Code: SR 3A to Request Routine Results by Address 
 
Supported By:
KWP2000 Interpreter 2
 
 
Description: 
The 3A Op-Code will build a standard service request 3A to send to an ECU. A Service Request 3A will 
request the results (e.g. exit status information) generated by a routine which is identified by a memory 
address. A positive response code 7A indicates the routine has successfully completed execution. 
Action Fields: 
AC0: Routine number from Utility File to get execution address from 
AC1: $00 - Not used 
AC2: $00 - Not used 
AC3: Exceptions: 
$00 - Use address from routine number AC0 
$01 - Use global address information from an Op-Code 'F1' 
 
Pseudo Code: 
XX 3A AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
Use KWP2000 Normal Response processing
Build Request Routine Results by Address Request as indicated in the table below 
Request 
Byte 
Value 
Byte Description 

80 
Format byte for physical addressing 

## 
Global target byte 

## 
Global source byte 


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

3A 
Request routine results by address request service ID

XX 
High byte of address

XX 
Middle byte of address

XX 
Low byte of address
9
CS
1 byte request checksum 
Calculate checksum and copy into service request (byte 9) 
Send Request Routine Results by Local ID Request and receive response (up to 10 Bytes) 
Goto KWP2000 Response Processing
If Request Routine Results by Local ID positive response is received 
Look for Request Routine Results by Local ID positive response service ID ($7A) in goto fields 
Else
Look for Request Routine Results by Local ID 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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