4-Pin Trace with LPC4357

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Configure required pins for trace output

1. Create a file for the device


* Configure pins to enable the trace port                            *

_WDWORD(0x40086790, 0x00000032); // Configure PF_4 AS FUNC2
_WDWORD(0x40086794, 0x00000033); // Configure PF_5 as FUNC3
_WDWORD(0x40086798, 0x00000033); // Configure PF_6 as FUNC3
_WDWORD(0x4008679C, 0x00000033); // Configure PF_7 as FUNC3
_WDWORD(0x400867A0, 0x00000033); // Configure PF_8 as FUNC3

2. Set the file as initialization file

  • Open the dialog "Options for Target - Debug".


  • Set the created file as Initialization File.

Configure µVision for ETM trace

  • Click Settings to open the "Target Driver Setup" dialog.
  • Click the Trace tab.


  • Set Enable and ETM Trace Enable.
  • Set Trace Port to "Sync Trace Port with 4-bit Data".
  • Start the debugging session and open an "Instruction Trace" window.

Sample project files