ECU Application Binary Download Failure in Boot Mode: Analysis and Solution
Discover the intermittent download failure issue during preprogramming steps, the error message responses, and the root cause analysis. Learn about the impact on CAN message processing time and potential improvements for ECU performance.
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Presentation Transcript
Intermittent Download Failure in Boot Mode using Vflash Tool. 19-Jul-2021 5acXjzUk
Problem Statement ECU Application binary download is failing intermittently during preprogramming steps. Footnotes 2 Title of the presentation FAURECIA Date 5acXjzUk
Summary of the Issue Detailed description As shown in figure, Application Binary download fails at the time of execution of preprogramming step intermittently. Error Message Response missing for RX_and_TX_Control(0x28 0x00 0x01) Download Failure Footnotes 3 Title of the presentation FAURECIA Date 5acXjzUk
Analysis and Logs Title Log Referring to logs, download is failing when duration between Tester present(0x3E 0x80) and DisableTxandRx communication(0x85 0x02) is less than 1 ms. This behavior is observed whenever Tester present(0x3E 0x80) is active and duration between tester present and other other diagnostic messages is less than 1 ms . Download failed in preprogramming step boot failed download Download succeed in preprogramming step boot success download Root Cause If 2 consecutive message comes with different less than 1msec, then the second message is rejected as we are still servicing previous message. 4 Title of the presentation FAURECIA Date 5acXjzUk
Solution Discussion Why ECU not able to serve two CAN messages for duration less than 1 ms? Can we improve CAN ISR processing time which takes less time to process in interrupt? 5 Title of the presentation FAURECIA Date 5acXjzUk
