trouble flashing arduino 33 with zephyr examples

[loganmeyer3]

Hi all.  I am fairly new to zephyr so I apologize for any "noob" errors i seem to present.  I have been working with nrf52 dk board and have been able to accomplish many things, pwm, gpio, ble, etc.  However I have decided to switch to a non nordic development board to better understand pin assignment and device tree files, before I design my own custom board.  As I had an arduino 33 ble laying around I decided to solder connections to the swdio swcclk etc connections and connect it to the output from j link debugger on the nrf 52 dk board. I know my connections, and method should be good as I am able to erase and re write the ardunio bootloader to the board though the nrf programmer. To be clear I am trying to not utilize the arduino bootloader and flash directly through nrf connect or through the programmer with the zephyr.hex file. However when I try to flash the board with with the sample nrf blinky blinky program I get no success. The sample program uses pin 9 which I believe should be the green led on the nano 33 ble. 

I have attatchedd here what I believe to be the correct modified board.cmake file.

# This was before
# SPDX-License-Identifier: Apache-2.0
#board_runner_args(nrfprog "--softreset")
#include(${ZEPHYR_BASE}/boards/common/nrfprog.board.cmake)
#include(${ZEPHYR_BASE}/boards/common/bossac.board.cmake)

# SPDX-License-Identifier: Apache-2.0

#this is after modification


  board_runner_args(jlink "--device=nrf5340_xxaa_app" "--speed=4000")
 
  
 
 
  board_runner_args(jlink "--device=nrf5340_xxaa_net" "--speed=4000")
 
  
  include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
  include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
  

I also have attached the modified .yaml file which I included gpio at the bottom. 

identifier: arduino_nano_33_ble
name: Arduino Nano 33 BLE
type: mcu
arch: arm
toolchain:
  - zephyr
  - gnuarmemb
  - xtools
supported:
  - adc
  - ble
  - i2c
  - ieee802154
  - pwm
  - serial
  - spi
  - uart
  - usb_cdc
  - usb_device
  - watchdog
  - gpio

the arduino sample dts file includs the common dtsi file and thus I assumed it would make no difference.  however for test i tried to build and flash the dts file with the contents of the common dtsi file which is very similar to the nrf 52 f25840 example dts file.

thanks

[loganmeyer3]

yes i had this set up before except with rest attached, however with reset removed it seems to make no difference.  I think really what I am trying to understand is what would be the correct board.cmake, .yaml, and arduino_nano_ble_defconfig file.

Unless there are any other things that I am missing or could have wrong.  I seem to be able to flash the blinky program to the arduino but it does not do  anything. 

[loganmeyer3]

wondering if any update? thanks

[Håkon Alseth]

Hi,

 

loganmeyer3 said:

wondering if any update? thanks

My deepest apologies for the delayed reply.

According to the schematic (https://content.arduino.cc/assets/NANO33BLE_V4.0_sch.pdf), the green LED is P0.16, which corresponds to the "led1" defined in the board itself:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.0.99-ncs1-1/boards/arm/arduino_nano_33_ble/arduino_nano_33_ble-common.dtsi#L25

 

If you build blinky for the "arduino_nano_33_ble" board, it will setup the ledX to point to the corresponding GPIOs.

To use "led1" instead of the default led0, change this line:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.0.99-ncs1-1/samples/basic/blinky/src/main.c#L14

 

PS: the nano33 has a nrf52840 device on it, not a nrf5340 as you've added as the runner args.

PPS: If you're new to NCS, I can recommend looking at the ncs sdk academy: https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/

  

Kind regards,

Håkon