nRF52840 dongle systick example

RE: nRF52840 dongle systick example

Aung — Sat, 01 May 2021 08:42:19 GMT

Kenneth, thanks for reply.

I'm thinking of adding voltage regulator (5v to 3.3v) SOT-223 or SOT-23 to nRF52840 dongle to overcome the "accidental UICR erase" problem.

Do you have any documentation for this modification?

Best regard,

Aung

RE: nRF52840 dongle systick example

Kenneth — Mon, 26 Apr 2021 14:50:14 GMT

The nRF52840-DK have a SEGGER J-link that can program through the SWD interface, the SWD interface have full access to all internal flash of nRF52840.

Kenneth

RE: nRF52840 dongle systick example

Aung — Sat, 24 Apr 2021 02:35:02 GMT

One more questions, please.

I want to know more about the differences between nRF52840 dongle and nRF52840-DK.

As far as I know that, if accidental UICR erase, REGOUT configuration of nRF52840 dongle will cause the problem.

This problem reduces the chip supply voltage (VDD) to default value, 1.8 V, configured by the REGOUT0 register in UICR and causing the dongle unable to boot again, since the dongle hardware is configured in high voltage mode.

nRF52840-DK has debugger to set REGOUT configuration properly and nRF52840 dongle does not have.

What are the differences between nRF52840 dongle (pca10056) and nRF52840-DK (pca10059)?

Best regards,

Aung

RE: nRF52840 dongle systick example

Aung — Fri, 23 Apr 2021 06:35:57 GMT

Thank you for reply, I've DK kit as well. From this tutorial (devzone.nordicsemi.com/.../nrf52840-dongle-programming-tutorial), I managed to convert pca10056 to 10059.

Aung

RE: nRF52840 dongle systick example

Kenneth — Thu, 22 Apr 2021 15:34:13 GMT

It should be possible to change the board file (e.g. change from BOARD_PCA10056 -> BOARD_PCA10059):
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/sdk_for_custom_boards.html

Though you may want to considering getting an nRF52840-DK, since you will have better access to all pins etc.

Kenneth