Freescale MKL25Z Devices

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To enable CoreSight MTB tracing on Freescale MKL25Z devices:

• Connect the target board and the host computer through a USB cable.
• Configure µVision to capture MTB trace data.

Configure µVision to capture MTB trace data.

1. Create a text file, for example DBG_MTB.ini, and enter the following code:

   /*-------------------------------------------------------------------
   ** Define the function to enable the trace port
   **-----------------------------------------------------------------*/
   FUNC void MTB_Setup (void) {
     unsigned long base;
     unsigned long master;
     unsigned long watermark;
     unsigned long _flow;
   
     master     = 0x80000008;
     _flow      = 0x00000000;
   
     base       = _RDWORD(0xF000000C);     // BASE
     watermark  = base + ((16 << (master & 0x1F)) - 32);
     _flow     |= watermark;
   
     _WDWORD(0xF0000004, 0x00000000);      // MASTER
     _WDWORD(0xF0000000, 0x00000000);      // POSITION
     _WDWORD(0xF0000008, _flow);           // FLOW
     _WDWORD(0xF0000004, master);          // MASTER
   }
   
   /*-------------------------------------------------------------------
   ** Invoke the function at debugger startup
   **-----------------------------------------------------------------*/
   MTB_Setup();
   

   Use the _WDWORD command to configure the device.

2. Open the dialog Options for Target — Debug and insert DBG_MTB.ini into the field Initialization File.

   

Start the debugging session and verify the captured trace data with a µVision window.

Note

• Use the examples delivered with the Freescale board FRDM-KL25Z as a reference.
• MTB tracing works in Serial Wire Debug as well as in JTAG Debug mode.