How to upload arduino sketch file via J-Link?

[seonghun]

Hello Everyone,

I designed and fabricated a small nRF52 board.
The design of this board is based on the Adafruit nRF52 feather.
The difference between my designed board and nRF52 feather is the existence of the pressure sensor.

However, I have one big problems here.

I would like to upload my arduino sketch file onto this my custom nRF52 board.
but my UART-USB chips did not work. (I used FT-232 instead of CP2104. I found that FT-232 does not works with nRF52 and Adafruit's nRF52 bootloader later.)

Therefore, I am looking for the way how to upload the sketch file via J Link such I used to upload bootloader. (using SWDIO and SWDCLK lines)

Would you please give me some advice how to upload it onto my nRF52 board?
Any comments and advises are welcome. 

Thanks,
Best regards,
S-H Choe.

[Jørgen Holmefjord]

Hi,

If you designed the board, you should know which pins are SWDCLK/SWDIO?

You only need to connect these pins, in addition to GND and VDD to VTG on the nRF52 DK. You can the use the nRF Connect Programming app or nrfjprog to flash hex-files. Do you get a hex-file output from the Arduino IDE?

Best regards,
Jørgen

[seonghun]

Hi,

Thanks for your reply.

(1) I connected SWDCLK, SWDIO and GND, VDD to the nRF52DK. I followed the instructions shown here.

https://devzone.nordicsemi.com/f/nordic-q-a/14058/external-programming-using-nrf52-dk

(2) I used nrfjprog to upload hex file.Here is my commands to upload hex file.

./nrfjprog -e -f nrf52

./nrfjprog --program bootloader_v050_s132_v201.hex -f nrf52

./nrfjprog --reset -f nrf52

(3) I got a hex-file which was generated by Arduino IDE at temp folder.

Do I need to merge the bootloader.hex and arduino_program.hex? 

I will try this again with my another nrf52 module and report to you soon.

Thanks so much.

S-H Choe

 

[awneil]

seonghun said:

I connected SWDCLK, SWDIO and GND, VDD to the nRF52DK

Note that the DK also needs EXT_VTG on the Debug Out connector - that's how it switches the onboard JLink connection from the nRF52 on the board to the external target ...

[seonghun]

Thanks so much. 

Here is my wiring. Would you please check that this wiring is correct or not?

nRF52-DK           Custom / External Board


VDD ------+-------------> VDD
         /
VTG ----+

GND ------------+-------> GND
               /
GND DETECT ---+

SWD IO -----------------> SWD IO

SWD CLK ----------------> SWD CLK