Can anyone tell me if the nrf52832 board requires the 32kHz crystal in order to be programed with the Arduino IDE?
I have a project board that is a production board based on the Sparkfun board but I didn’t include the crystal as I don’t need the RTC function or great accuracy. I am able to load the boot loader but I can’t get the time bomb to work on the LED.
I am able to run programs on the Segger Embedded Studio without a problem. I would really like to use the Arduino IDE for this project. If the 32kHz crystal is required with the bootloader to function can it be modified to not need it?
Despite Sparkfuns hookup guide simply telling you if you need two more analog inputs and not the RTC just to cut the pins to the crystal. The guide doesn’t mention that you are saying goodby to the Arduino IDE. That is of course if there isn’t a setting in some file that lets you select the internal clock for the bootloader.
I have found in the variant.h file located in \ArduinoData\packages\SparkFun\hardware\nRF5\0.2.3\variants\SparkFun_nRF52832_Breakout
That there is mention of the clock in the lines:
/** Master clock frequency */
#define VARIANT_MCK (64000000ul)
I wonder if that is the area where the internal clock can be changed from external xtal to internal…
(I took one of my Sparkfun boards and cut the jumper to the crystal pins.)
Can anyone tell me where such a setting might exist?
Regards,
Kevin