MCUXpresso SDK Documentation
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Hardware requirements

Hardware requirements#

  • Type-C USB cable

  • KW47-LOC Board

  • Personal Computer

  • Jlink plus

Board settings#

No special is needed.

Prepare the Demo#

  1. Connect a USB cable between the host PC and the LOC board J3. Add a jumper on JP22 then the MCU-Link will detect the presence of JP22 and disable the MCU-Link debugger, allowing the external J-Link to enter into play.

  2. Connect Jlink plus probe to the debug trace connector(J5).

  3. Download the program to the target board.

  4. Open JlinkerSWOView(Such as C:\Program Files (x86)\SEGGER\JLink\JlinkerSWOView.exe), select the target device, such as KW47B42ZB7_M33_0 and make sure the core clock and swo clock frequency are equal to the demo setting, the SWO clock frequency is defined in hello_world_swo.c by macro DEMO_DEBUG_CONSOLE_SWO_BAUDRATE(4MHz by default).

  5. After swo/core clock frequency is measured successfully, press ok to continue, make sure the bit 0 is selected in “Data from stimulus port(s)” item.

  6. Press the reset button on your board.

  7. Press SW3.

  8. Note: If use MCUxpresso IDE, you need to set the SDK debug console to UART when importing projects at Project Options -> SDK Debug Console -> UART.

Running the demo#

The log below shows the output of the hello world swo demo in the JlinkerSWOView window and the demo will print output periodically or when SW3 is pressed:

SWO: timer_trigger
SWO: timer_trigger
SWO: timer_trigger
SWO: hello_world
SWO: timer_trigger
SWO: timer_trigger
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