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Programming the nRF54L15

Overview

This guide describes how to program the nRF54L15 on the nRF54L15 Connect Kit through the Interface MCU.

Requirements

Before you start, check that you have the required hardware and software:

Tip

Python and pyOCD will be installed after setting up your development environment in Getting Started Guide.

Installing pyOCD

To program the nRF54L15, a tool that supports the CMSIS-DAP protocol should be installed. pyOCD v0.38.0 or newer is required.

The latest stable version of pyOCD may be installed via pip. Open up a terminal and run:

py -3 -m pip install -U pyocd

python3 -m pip install -U pyocd

python3 -m pip install -U pyocd

Note

On Linux, permission to access USB devices from user space must be explicitly granted via udev rules. See udev rules on Linux for detailed instructions.

Connecting the board

Connect the nRF54L15 Connect Kit to your computer with a USB-C cable.

Enter the following command to list the connected device:

pyocd list

You should see the output, similar to what is shown in the following:

Terminal
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  #   Probe/Board              Unique ID               Target
-----------------------------------------------------------------
  0   ZEPHYR IFMCU CMSIS-DAP   820D9A5F0E322B8EFE662   ✔︎ nrf54l
      Makerdiary               nRF54L15 Connect Kit

Programming with pyOCD

To program the nRF54L15 with pyOCD, complete the following steps:

  1. Enter the following command to program the application firmware:

    pyocd load -t nrf54l <firmware.hex> # (1)!
    1. You can also use pyocd flash instead: 
      pyocd flash -t nrf54l <firmware.hex>

  2. The RGB LED blinks blue rapidly during programming.

  3. The application starts running after the firmware programming is completed. If not, press the DFU/RST button to reset the nRF54L15.

In some cases, you may need to erase the entire non-volatile memory (RRAM) of the nRF54L15:

pyocd erase -t nrf54l --chip