emulator firmware NRF51-DK

[Martijn]

We have some NRF51-DK devices here. Recently we upgraded our segger software to v5.00. During programming using nrfjprog we got the question to upgrade the emulator firmware. We did this, and it works.

But we have a problem with the serial port. We can not get any inforamtion from the nrf51 uart to the pc and vice versa. when we downgrade the emulator firmware back to the original state it works again. But now we get the question to upgrade every time we program.

Any ideas how to fix this?

[gamnes]

Hi Martijn,

I'm sorry to hear that you are having troubles using the serial port. I have not seen any problems where the UART communication does not reach the nRF51 nor the PC side.

Could I bother you to provide me with some extra information regarding your situation? The firmware provided with the Segger software v5.00 should be: J-Link .... compiler Jun 8 2015 10:56:52.

1. Is there any reason you are not using the latest Segger software package? Currently, that is v5.02.
2. Which version of emulator firmware are you downgrading to when it works again? NOTE: Yes you will be asked to update every time you program if you have an older firmware and a newer one is available in the Segger Software.
3. Have you tried flashing the board, and then doing a power on reset (power the board off and on again) to see if that fixes the issue?
4. Have you tried the UART example from the SDK? Does this work?