Situation
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Code: 4861.blinky.zip
Environment
VS Code
nRF Connect SDK v1.6.0
cmake version 3.24.0-rc2
gcc.exe (Rev2, Built by MSYS2 project) 12.1.0
Zephyr version: 2.6.0-rc1
west version "0.11.0"
Board
nRF52832 Rev 2
HFCLOCK is run with XO
LF clock is internal RC.
Reset pin is not connected.
Problem
I am trying to run the zephyr blink example on a custom board with a nrf52832 Rev 2.
When I program the board and debug the application functions as expected.
When I flash the board without debugging, nothing appears to happen.
Observation
After flashing the application
- With an oscilloscope, I have observed the HF clock does not start.
- The reset pin is HI
- no other accessible pins seemed to change state.
- Supply Voltage remained stable
Occasionally, I am unable to connect JLink to the board when an application has been flashed. To fix this, I power cycle the board and quickly connect JLink as its turning on. Then erase the program.
My Attempts
I have tried playing around with different clock and reset configuration options.
I have tried using MCUboot
I have tried several different device tree and board configurations
Success with Segger Embedded Studio NRF5 SDK v17.1
I tried programming the blinky example for pca10040 to the board. It worked as expected.
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Question
This appears to be a software issue using the nrf connect SDK v1.6.
Here is my latest prf.conf
CONFIG_GPIO=y
CONFIG_RESET_ON_FATAL_ERROR=y
CONFIG_GPIO_AS_PINRESET=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y
CONFIG_BT=n
CONFIG_DEBUG=n
CONFIG_LOG=n
CONFIG_CONSOLE=n
CONFIG_USE_SEGGER_RTT=n
CONFIG_PM=n
The rest of the code can be found attached.
Any suggestions are appreciated.