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Flashing nrf53 using ST-LINK

ramonmaruko

Hello, I am looking to cheaply flash a nrf5340. This will most likely be a one-time thing, so I don't want to invest in a J-Link device.

I have an ST-LINK clone though and I am wondering if that could program/flash an nrf5340 module? If not, can the NRF52-DK flash/program a nrf5340 module?

I am also open to other cheap alternatives of flashing the nrf5340.

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  • +1

    Hi Ramon,

    If it were a nRF52-series device, you could use the nRF52 DK to program it. Almost all of our development kits have an on-board (OB) debugger that is wired up to either a "debug out" port or to Serial Wire Debug (SWD) pins, and these are meant for exactly this purpose.

    Unfortunately the OB debugger on the 52-series DKs can't program to the newer ARMv8-M architecture of the nRF5340's Cortex M33 (although it would have worked the other way around, I just tested this).

    Assuming your project is non-commercial, you can buy a SEGGER J-Link EDU Mini, but these seem to be out of stock everywhere. It supports the Cortex M33.

    I think the cheapest alternative for you would be to get an NRF5340DK and use SWD/debug out to program. To connect through SWD to your custom board, you can do as follows:

    Or just connect debug out to debug in, if you have that on your board. See this page for details: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fnwp_034%2FWP%2Fnwp_034%2Fnwp_034_gpio_swd.html

    I don't know anything about ST-LINK. Some quick browsing returned this: Converting ST-LINK On-Board Into a J-Link - though I believe you remain restricted to flashing ST devices.

    Best regards,

    Raoul

    edited this post to note that nRF52 OB debuggers can't flash ARMv8-M devices.

Reply
  • +1

    Hi Ramon,

    If it were a nRF52-series device, you could use the nRF52 DK to program it. Almost all of our development kits have an on-board (OB) debugger that is wired up to either a "debug out" port or to Serial Wire Debug (SWD) pins, and these are meant for exactly this purpose.

    Unfortunately the OB debugger on the 52-series DKs can't program to the newer ARMv8-M architecture of the nRF5340's Cortex M33 (although it would have worked the other way around, I just tested this).

    Assuming your project is non-commercial, you can buy a SEGGER J-Link EDU Mini, but these seem to be out of stock everywhere. It supports the Cortex M33.

    I think the cheapest alternative for you would be to get an NRF5340DK and use SWD/debug out to program. To connect through SWD to your custom board, you can do as follows:

    Or just connect debug out to debug in, if you have that on your board. See this page for details: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fnwp_034%2FWP%2Fnwp_034%2Fnwp_034_gpio_swd.html

    I don't know anything about ST-LINK. Some quick browsing returned this: Converting ST-LINK On-Board Into a J-Link - though I believe you remain restricted to flashing ST devices.

    Best regards,

    Raoul

    edited this post to note that nRF52 OB debuggers can't flash ARMv8-M devices.

Children
  • 0 in reply to Raoul

    Hi,

    so the newest nRF52-DKs have a different On Board Debugger than the older ones. These can easily be spotted by the size of the debugger, if it is old then it is a large TQFP package (like in the picture above), if it is a small aQFN then it is a new one. The new kits can actually program all the ARMv8-M devices (nRF53/nRF91). Remember that operating voltage of the external kit still needs to match the voltage on the DK...

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