I bought a nRF52 DK which is labled "PCA10040 V1.2.1 2017.21 xxxxxxxxx". xxxxxxxxx is a serial number, I guess. I just could not run the most simple example of mbed-os-example-blinky. This board defaultly supports Jlink OB so I follow instructions in mbed website to update the inferface firmware. The link is "https://os.mbed.com/platforms/Nordic-nRF52-DK/#firmware-update"
What I did are:
1,make the PCA10040 go into bootloader mode by resetting it while holding the BOOT/RESET botton.
2, drag and drop the latest inferface firmware "Version 0219." onto bootloader disk then reset the board. I noticed that this latest firmware is coming from nordic and it is named" nrf51822aa_atsam3u2c_if_mbed_V0219_02022016.bin". But my board is soldered with a nrf52832. Is this ok?
3,drag and drop "mbed-os-example-blinky_NRF52_DK.hex" onto MBED disk and then resetting the board. And nothing happens. I could not see the led toggling... Actually some error happens because I saw a file named "fail.txt" with contents "TIMEOUT" appear onto the MBED disk. The " mbed-os-example-blinky_NRF52_DK.hex" is what I got using MEB online complier with NRF52 DK selected as my target baord.
By the way, I am using windows 10.
Can anyone help ? Could you check to see if you could reproduce this issue by following my steps?