I have been developing for several years with the nRF52832 and 52840 devkits. I have several of each available. One specific 52840 dk seems to have crashed code in the interface MCU. I found a thread several years old discussing how to re-flash the code, but the links there are all broken. Also, they all mention an IF reset/boot button, and i see no such item on my board. How should I go about re-flashing the IF MCU firmware?
Hello,
Are you sure you don't have an IF BOOT/RESET button on your nRF52840 DK? Is it a devkit from Nordic Semiconductor, or a 3rd party DK? If it is a Nordic DK it should be here:
I guess a lot of these links are broken after we migrated to the new layout for nordicsemi.com.
However, if it is in fact the Nordic DK, you can find the IF MCU FW under the download section on the DK page on nordicsemi.com:
https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/Download?lang=en#infotabs
So to repeat the guide:
1. power off the DK
2. hold IF BOOT/RESET while you power on the DK and note LED5 (next to the IF MCU) blinking.
3. Drag and drop the FW from the link above into the "BOOTLOADER" device that pops up.
4: wait for the copy to finish, and note the LED5 blinking faster
5. Power off the DK and power it back on (without holding IF BOOT/RESET this time).
Best regards,
Edvin
Hello,
Are you sure you don't have an IF BOOT/RESET button on your nRF52840 DK? Is it a devkit from Nordic Semiconductor, or a 3rd party DK? If it is a Nordic DK it should be here:
I guess a lot of these links are broken after we migrated to the new layout for nordicsemi.com.
However, if it is in fact the Nordic DK, you can find the IF MCU FW under the download section on the DK page on nordicsemi.com:
https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/Download?lang=en#infotabs
So to repeat the guide:
1. power off the DK
2. hold IF BOOT/RESET while you power on the DK and note LED5 (next to the IF MCU) blinking.
3. Drag and drop the FW from the link above into the "BOOTLOADER" device that pops up.
4: wait for the copy to finish, and note the LED5 blinking faster
5. Power off the DK and power it back on (without holding IF BOOT/RESET this time).
Best regards,
Edvin
