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[SOLVED] J-Link running as multiple single-steps when used with ARM Cortex-A9 from IAR Embedded Workbench

SteveWitt - Nov 6th 2019, 5:25pm - J-Link/Flasher related
Post

I believe I've now found the problem - the IAR project had "Library low-level interface implementation" set to "Semihosted" which appears to result in an SVC vector catch being added on connection. Setting this to "None" resolves the issue. The re-attach worked around this because the debugger was unable to set the vector catch while the target was running so the problem then didn't manifest. Regards, Steve
[SOLVED] J-Link running as multiple single-steps when used with ARM Cortex-A9 from IAR Embedded Workbench

SteveWitt - Nov 6th 2019, 2:46pm - J-Link/Flasher related
Post

Hi, I'm wondering if you can provide some clues as to what's happening when I run firmware on a SoC containing an ARM Cortex-A9 from a recent version of IAR embedded workbench (v8.40.1.2xxxx). The symptom is that everything connects and downloads OK, but when the run button is used, the firmware runs very, very slowly. Looking at the j-link logs this appears to be because the application is running as a series of single-steps (note that it is not being paused and re-started, it should be just fr…