freemaster

dream_lostcity — Sat, 30 May 2026 04:12:40 GMT

I built a Simulink model for the S32K344-WB to make an LED toggle on and off every 1 second. I then imported the ELF file into FreeMASTER and monitored waveforms via J-Link. However, after I clicked Go, the signal level on the FreeMASTER oscilloscope stayed as a flat line and did not toggle. When I pressed the physical Reset button on the board, the LED started blinking normally, but the waveform display in FreeMASTER paused. How should I configure the settings to observe waveforms on the FreeMASTER oscilloscope while the MCU runs normally with the LED toggling continuously?

Re: freemaster

SorinIBancila — Wed, 12 Aug 2026 11:59:11 GMT

Hello,

First of all, sorry for the late reply.

If you reset the evaluation board while FreeMASTER is already connected to the board, you have to STOP the FreeMASTER connection and start it again. Otherwise, it is going to get stuck.

One way I do what you want to achieve is to store the state of the LED in a Data Store Memory. Apply the NOT operation (to change from LOW -> HIGH and HIGH -> LOW) and feed the value to Dio_WriteChannel. This way, you can mark the Data Store Memory as Volatile or External so you can load it into FreeMASTER project.

If you want to be to perform the read and write operation on a DIO channel, you need to configure the pin to be configured as INOUT (Pins tab in S32CT).

Best regards,
Sorin Bancila

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