Debugging and troubleshooting a custom board using NRF52832

[notkuroneko]

Hello.

I'm having issues with a custom design board using NRF52832_QFAA SOC.

This is the snippet of the schematic design that my group created:

This board uses internal DCDC, 2 external GPIO LEDs, an instance of I2C and the 32MHz oscillator.

Some other custom board files:

7450.omniring_rev_1.dts

0525.omniring_rev_1-pinctrl.dtsi

8130.Kconfig.defconfig

Fullscreen 1106.Kconfig.omniring_rev_1.txt Download

config BOARD_OMNIRING_REV_1
	select SOC_NRF52832_QFAA

Fullscreen 2262.omniring_rev_1_defconfig.txt Download

# SPDX-License-Identifier: Apache-2.0

# Enable MPU
CONFIG_ARM_MPU=y
CONFIG_HW_STACK_PROTECTION=y

# CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y
# CONFIG_CLOCK_CONTROL_NRF_K32SRC_50PPM=y
CONFIG_BOARD_ENABLE_DCDC=y

# Enable RTT
CONFIG_USE_SEGGER_RTT=y

# Enable GPIO
CONFIG_GPIO=y

# Enable I2C driver
CONFIG_I2C=y

# choose RTT console
# Disable UART console as RTT is chosen
CONFIG_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y

# Config logger
CONFIG_LOG=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

Right now we are trying to flash a few test programs into the custom board, 1 to test the 2 LEDs and 1 more to test Bluetooth LE Advertising. The 2 applications built successfully using the custom board, but when we flashed the .hex files into the custom board, none of the functionalities worked. We used both "west flash" from the VSCode extension and JLink's J-Flash utility. 

At this point we are not sure if our hardware design or software design is flawed or missing any details. And we have no clue how to troubleshoot them.

Any help is really appreciated. Feel free to ask for relevant extra details about our design.

Regards, 

Jackie

[Turbo J]

With 1.8V VDD I would expect neither green nor blue LED to light up - that voltage is only enough for red LEDs.

If you don't have the 32.768kHz crystal populated, you need CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

Otherwise the code won't work.

[tbthanh]

Thank you so much for the fast reply, you sure is Turbo.

The color of the led is my mistakes when designing the board pcb, in the end we ended up using all red led. After adding "CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y" the code work perfectly and the board now send rtt log.