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SEGGER has now introduced J-Link firmware for the embedded ST-LINK on STM32 Nucleo, STM32 Discovery and other microcontroller unit (MCU) evaluation boards from STMicroelectronics. This brings the proven reliability and industry-leading performance of SEGGER’s highly popular J-Link debug technology to these items of hardware, thereby leading to more efficient development processes.The upgrade turns a board’s ST-LINK interface into a fully functional J-Link, which can then be employed to debug the board's application processor. By upgrading to the J-Link firmware, developers will subsequently be able to set an unlimited number of breakpoints in Flash memory and debug their applications considerably faster - resulting in better use of engineering resources and shortened time to market.The J-Link firmware offers compatibility with all major tool chains, including those using GDB (GNU Debugger), on all major host platforms (Windows, Mac, Linux), while also attaining elevated operational benchmarks, including the fastest download speed into RAM and Flash memory. The tool needed to upgrade the firmware of the on-board ST-LINKs can be downloaded free of charge from SEGGER’s website. If it ever becomes necessary to do so, the exchange process is completely reversible, restoring the original ST-LINK functionality.
LicensingSEGGER created a firmware which runs on the ST-LINK on-board, making it J-Link compatible. In order to make use of this firmware, the following Terms Of Use must be accepted: The firmware is only to be used with ST target devices. Using it with other devices is prohibited and illegal. The firmware is for use with evaluation boards only. It is not for use with custom hardware. The firmware may only be used for development and/or evaluation purposes. It may not be used for production purposes. The firmware is made available without any warranty and without support.
LimitationsThe firmware making the ST-LINK on-board J-Link compatible has some limitations in contrast to an original, industry leading SEGGER J-Link: May be used with ARM based ST devices only Only debugging on evaluation boards is allowed. Debugging on custom hardware is not supported and not allowed No production flash programming support Unlimited breakpoints in flash available for evaluation only No support is given
