Converting ST-LINK On-Board Into a J-Link
SEGGER offers a firmware upgrading the ST-LINK on-board on the Nucleo and Discovery Boards.
- Fully compatible with and same features as J-Link OB [More..]
- Wide range of IDEs are supported
- Virtual COM port (VCOM) support
Getting Started with ST-LINK On-Board
In order to get started with ST-LINK on-board and upgrade it to a J-Link OB, just a few steps are necessary:
- Connect ST-LINK on-board to PC
- Select "Upgrade to J-Link"
- Wait for operation to complete
- Quit the STLinkReflash utility
Terms of use
SEGGER 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.
If there is any doubt if a certain use may be considered within the foregoing scope it is strongly recommended to consult SEGGER prior to use.
When starting a debug session, the following license dialog shows up which must be accepted in order to be able to work with ST-LINK on-board:
Compatible Evaluation Boards
The following evaluation boards have been tested with the J-Link OB firmware and are known to be working. Other evaluation boards may work as well but are not guaranteed to do so. In case of doubt, please consult SEGGER. The pictured evaluation boards are examples only. Other models might vary in layout.
Discovery
- 32F0308DISCOVERY (STM32F0308-DISCO)
- 32F3348DISCOVERY (STM32F3348-DISCO)
- 32F411EDISCOVERY (STM32F411E-DISCO)
- 32F413HDISCOVERY (STM32F413H-DISCO)
- 32F429IDISCOVERY (STM32F429I-DISC1)
- 32F429IDISCOVERY (STM32F429I-DISCO)
- 32F469IDISCOVERY (STM32F469I-DISCO)
- 32F723EDISCOVERY (STM32F723E-DISCO)
- 32F746GDISCOVERY (STM32F746G-DISCO)
- 32F769IDISCOVERY (STM32F769I-DISCO)
- 32L0538DISCOVERY (STM32L0538-DISCO)
- 32L100CDISCOVERY (STM32L100C-DISCO)
- 32L476GDISCOVERY (STM32L476-DISCO)
- 32L496GDISCOVERY (STM32L496G-DISCO)
- STM32F0DISCOVERY
- STM32F3DISCOVERY
- STM32F4DISCOVERY (STM32F407G-DISC1)
- STM32L4R9 Discovery kit (STM32L4R9I-DISCO)
Nucleo
- NUCLEO-F030R8
- NUCLEO-F031K6
- NUCLEO-F042K6
- NUCLEO-F070RB
- NUCLEO-F072RB
- NUCLEO-F091RC
- NUCLEO-F103RB
- NUCLEO-F207ZG
- NUCLEO-F302R8
- NUCLEO-F303K8
- NUCLEO-F303RE
- NUCLEO-F303ZE
- NUCLEO-F334R8
- NUCLEO-F401RE
- NUCLEO-F410RB
- NUCLEO-F411RE
- NUCLEO-F412ZG
- NUCLEO-F413ZH
- NUCLEO-F429ZI
- NUCLEO-F446RE
- NUCLEO-F446ZE
- NUCLEO-F722ZE
- NUCLEO-F746ZG
- NUCLEO-F767ZI
- NUCLEO-G0B1RE
- NUCLEO-H743ZI
- NUCLEO-L011K4
- NUCLEO-L031K6
- NUCLEO-L053R8
- NUCLEO-L073RZ
- NUCLEO-L152RE
- NUCLEO-L452RE
- NUCLEO-L476RG
- NUCLEO-L496ZG
- NUCLEO-L496ZG-P
- NUCLEO-L4R5ZI
- P-NUCLEO-WB55
Other
- B-L072Z-LRWAN1
- STM32L475 Discovery Kit for IoT Node
- STM32F769I-Eval
Restore ST-Link Firmware
If, for whatever reason, the original ST-LINK firmware shall be restored and the ST-LINK on-board is already running the J-Link firmware, this can be achieved via the STLinkReflash utility:
- Start the STLinkReflash utility
- Agree to the license terms
- Connect ST-LINK on-board to PC
- Select "Restore ST-Link"
- Wait for operation to complete
- Quit the STLinkReflash utility
Firmware Version History and Limitations
Firmware Version History
Format: YY-MM-DD
19-08-12:
- ST-LINK/V2: Added support for J-Link nickname feature
(See wiki.segger.com/J-Link:Nickname for more info) - ST-LINK/V2-1: Added support for J-Link nickname feature
(See wiki.segger.com/J-Link:Nickname for more info)
19-05-08:
- ST-LINK/V2-1: Added VMSD drag & drop flash programming capability to firmware
- ST-LINK/V2-1: VMSD drag & drop did not start the target application automatically after flash programming was finished. Fixed.
17-08-07:
- ST-LINK OB on some Nucleo-L152RE boards was not detected properly and could not be converted to J-Link. Fixed.
17-06-28:
- Under special circumstances, heap was overwritten when using HSS functionality. Fixed.
16-12-21:
- Tx-Idle level for UART, used for virtual COM port, was LOW instead of HIGH which could cause problems when using VCOM. Fixed.
16-10-07:
- 8 MHz MCO was not output on ST-LINK/V2 based boards (e.g. STM32F0DISCOVERY). Fixed.
16-08-04:
- Improved download speed
- When using RTT and invalid contents were read from RAM, firmware could hang. Fixed.
16-05-04:
- Added support for SWO
16-04-15:
- Initial version that supports ST-LINK/V2 and ST-LINK/V2-1
Limitations
The 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
By using an original SEGGER J-Link PRO, J-Link ULTRA+ or J-Link PLUS, all these limitations will be gone. Learn more about J-Link.