The fw-loader tool can:

  • List connected supported KitProg3 development kits or MiniProg4 probes

  • Perform firmware update to KitProg3 or KitProg2

  • Switch between KitProg3 Bulk/HID/DAPLink/Dual-UART/Bootloader mode

  • Configure KitProg3 GPIO pins

  • Reset KitProg3 development kit /MiniProg4 probe(s)

  • Send USB commands on KitProg3/MiniProg4 CMSIS-DAP programming interface

Supported OS​

The fw-loader tool supports the following operating systems:

  • Windows 10 64-bit and 11 64-bit

  • Ubuntu Linux 22.04 LTS , 24.04 LTS and 25.04 LTS

  • macOS Ventura, Sonoma and Sequoia

Note:

On a Linux machine, run the udev_rules\install_rules.sh script before the first run of the fw-loader tool.

Supported hardware​

The fw-loader supports the following programming hardware:

  • MiniProg4 stand-alone programmer

  • KitProg3 onboard programmer

  • KitProg2 onboard programmer (in proprietary mode)

KitProg3 device naming​

In this document, the term "KitProg3-based device" refers to any development kit or stand-alone probe that carries the KitProg3/2 communication firmware on it. Therefore, it is used in any description about development kits such as CY8CKIT-062-BLE or MiniProg4 probe. Refer to

KitProg3 user guide

for a full list of supported kits.

The full KitProg3-based device name is typically displayed as follows:

KitProg3 CMSIS-DAP BULK-1014091C02179400

It consists of the device type (KitProg3), the mode in which the device operates (CMSIS-DAP BULK), and the serial number (1014091C02179400). Any development kit or MiniProg4 probe can be addressed by the full KitProg3-based device name. The full name should be used in quotes (e.g., "KitProg3 CMSIS-DAP BULK-121902F302098400").

Mode​

The same KitProg3-based device can have distinct full names based on different modes. For example:

  • KitProg3 CMSIS-DAP BULK-1014091C02179400

    – KitProg3-based device in the Bulk or DualUART mode

  • KitProg3 CMSIS-DAP HID-1014091C02179400

    – KitProg3-based device in the HID mode

  • KitProg3 Bootloader-350302130E0C2744 - KitProg3-based device in the Bootloader mode

  • KitProg3 DAPLink CMSIS-DAP-1907130135130e0c0335130e00000000000000002e127069 - KitProg3-based device in the DAPLink mode

Serial number​

Each KitProg3-based device can be identified by the serial number, which is an alpha-numeric value. It is the last part of the full KitProg3-based device name. All fw-loader device-specific commands can take the serial number as their KitProg3-based device name argument. For example:

fw-loader –-update-kp3 1014091C02179400

Package Contents​

The fw-loader tool package contains:

  • CyBridge library – The dynamic library providing API for communication with KitProg3-based device.

  • Auxiliary libraries – Additional run-time libraries used by the fw-loader tool.

  • Firmware folder – This folder contains the KitProg2/3 firmware files.

Launch fw-loader tool​

As a stand-alone tool:​

The latest stand-alone version of the fw-loader tool can be found in our

GitHub repository

. Download the appropriate zip archive and unzip it to any convenient location.

Run the fw-loader tool from the installation directory. For example:

<install-dir>/fw-loader/bin/

From ModusToolbox™ Programming tools package:​

The fw-loader tool is installed as part of the ModusToolbox™ Programming tools package. The following is the default path to fw-loader tool:

<install-dir>/ModusToolboxProgtools-x.x/fw-loader/bin/