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Engineer+

E2E Protection Simulator

AUTOSAR End-to-End data protection - CRC calculation, sequence counters, alive counters, state machine, and fault injection

DataID: Length:
Fault Injection:
0
Messages Sent
0
E2E OK
0
Errors Detected
100%
Success Rate

🔄 E2E Data Flow

Idle
SENDER (ECU A) E2E_Protect() Counter: 0 CAN Bus Clean FAULT None RECEIVER (ECU B) E2E_Check() Waiting...

📤 Sender - E2E_Protect()

Application Data (hex bytes)
Protected PDU (output)
Press Send to generate protected PDU
XXCRC XXCounter XXPayload XXCorrupted

🔢 CRC Calculation Detail

CRC-16 / CCITT-FALSE
CRC steps will appear after first message

📊 E2E State Machine (Receiver)

NODATA
→
INIT
→
VALID
⇄
INVALID
E2E_SMCheckState Transitions:
• NODATA → INIT: First valid E2E_Check result received
• INIT → VALID: WindowSize consecutive OK results
• INIT → INVALID: Too many errors during init window
• VALID → INVALID: MaxErrorAllowed exceeded in window
• INVALID → VALID: MinOkRequired reached in window
• Any → NODATA: No new data for timeout period

📥 Receiver - E2E_Check()

Received PDU
Awaiting data...
Check ResultNONEWDATA
SM StateNODATA
Rx CRC-
Calc CRC-
CRC Match-
Rx Counter-
Expected Counter-
Counter Status-
E2E Protection Log
Ready - Select profile, enter data, and send messages.

📈 Message Timeline

OK CRC Error Loss Repeat
Msg #1-