nRF52840 dongle systick example

[Aung]

Hello,

I'm new to BLE product and nRF52840  dongle and DK are my first BLE evaluation kits. I've some experience in Arduino AVR microcontroller. My setup is as follow:

- nRF52840 dongle PCA10059 (1.2.0)

- J-Link EDU for debugging purpose

- IAR Embedded Workbench IDE v8.20.1

- Windows 10

I've tried "blinky" example from nRF SDK (nRF5SDK1702d674dde.zip) and successfully tested. Next step, I want to try "blink_systick" example, but there is no example for nRF52840 dongle PCA10059. Can anyone guide me where to find the example?

Best regards,

Aung

[Kenneth]

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

[Aung]

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

[Aung]

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

[Kenneth]

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

[Aung]

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