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| Advantages | Disadvantages | | :--- | :--- | | Sees errors invisible to the standard UI. | Complexity: Requires knowledge of Assembly/Kernel architecture to interpret. | | Hardware Diagnosis: Distinguishes between software corruption and hardware failure. | Performance Overhead: The flashing process becomes significantly slower due to logging. | | Security Auditing: Helps analyze secure boot chains. | Data Volume: Generates massive log files that can consume disk space. |
Restores a bricked device to its factory state.
The trace mode will clearly flag if the partition table in your scatter file does not match the physical storage layout of the phone. Safety Reminders
Before configuring SP Flash Tool or investigating its logs, you must assemble the correct software environment. Smartphone Flash Tool -runtime Trace Mode-l
Fix SP Flash Tool COM Port Open Error: A Simple Guide - Crawler
[ 123.456789] CPU0: func_entry 0xffffff8008123456 (mutex_lock) [ 123.456801] CPU0: func_exit 0xffffff8008123456 (mutex_lock) ret=0 [ 123.456802] CPU1: irq_entry 42 (mmc_irq) [ 123.456810] CPU1: irq_exit 42 (mmc_irq)
This traces the initial handshake between the computer and the phone's Boot ROM. If the trace stops here, the driver (MTK VCOM) is likely not installed correctly, or the device is not entering preloader mode. B. Preloader Trace | Advantages | Disadvantages | | :--- |
Once an operation is run with trace mode active, the software dumps the text files into a specific directory. By default, these are stored in the root folder of your SP Flash Tool installation under a directory named logs or rt_trace . The files are saved as .txt or .log documents prefixed with the date and timestamp of the execution. Troubleshooting Common Errors Using Trace Logs
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Check the box to enable or set the log severity index to Debug/All . | Restores a bricked device to its factory state
The preloader is responsible for initializing DRAM. Tracing this mode helps identify DRAM initialization errors, which often occur when the scatter file does not match the device’s memory configuration. C. Download Agent (DA) Communication
It operates by leveraging or System Trace Macrocell (STM) blocks found in ARM Cortex-A cores, combined with MediaTek’s proprietary firmware hooks. The tool streams this data over USB while the device remains operational, albeit in a special engineering state.
It includes a "Capture Screen" feature, allowing users to take screenshots of the device's state at specific points during the process. How to Access and Use