FXTH87E can't debug

[jackjiang]

Dears,

Using FXTH87EH, IDE is CodeWarrior 10.7, project file as shown in figure 1:

The contents of the compiled S19 file are shown in figure 2 :

Note: The generated S19 files are 0xFF in the range of FD40-FDFC address, causing the factory configuration data at this address to be erased, and the chip cannot be debugged online.

After manually deleting the 0xFF data in the FD40-FDFC range in the S19 file, and then burning the S19 file into FXTH with USBDM, the MCU can work successfully.

I would like to ask how to configure the IDE to avoid generating S19 file does cover the factory configured data, thanks.

[TomasVaverka]

Dear Jack,

Please find below the answer from our TPMS software expert.

It is not possible to prevent the generation of 0xFF in the trim section. This is due to the fact that trim coefficients are declared as global variables in the firmware library to be used by the compensation firmware functions, and the global variables are visible in the application project, thus appearing in the s19 file.

However CodeWarrior IDE is configured not to erase the trim section, when using the debugger or Flash Programmer tool ‘Erase and Program’ command. This means that even if 0xFF appears in the trim section, the trim section will not be erased.

Note that the trim section will be erased if the command ‘Erase Whole Device’ is executed with Flash Programmer. So do not use this command.

The fact that the debug session is not maintained is not due to trim coefficients being erased. When trim is erased this has no impact on the execution of the code, the only influence will be measurement and compensation sensor values returning dummy data.

The reason why the debug session is not maintained with the TPMS_87E_WheelLoc project is because the project was not written to be debugged. For projects to work in a debug session, several points must be considered when writing the application. The document attached explains how to write an application that will work in and outside a debug session.

Best regards,

Tomas

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