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ARM Cortex-M / LPC4357: Debugging M4 core via SWD Debug Protocol

31-Aug-2021

The LPC4357 is a dual-core with ARM Cortex-M4 and Cortex-M0 cores, which are accessed via the following Debug Protocols: 

  • Cortex-M4 on JTAG and SWD
  • Cortex-M0 only on JTAG

By default winIDEA tries to connect to all available cores. When selecting the SWD Debug Protocol, winIDEA should connect only to Cortex-M4 core. 


Possible solution: 

1. Open Hardware menu / CPU Options / SoC.

2. Make sure SWD Debug Protocol is selected. 

3. Go to Cores / CortexM0 page. 

4. Make sure the option Connect to core at session start is disabled.




More resources:

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