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** [tickets:#311] RTT error with ST-Link**

**Status:** new
**Milestone:** 0.11.0
**Created:** Sun Jul 11, 2021 05:55 AM UTC by Artem
**Last Updated:** Sun Jul 11, 2021 05:55 AM UTC
**Owner:** nobody


Tried to use RTT with nrf51 connecting via SWD:
`rtt setup 0x2000000 0x1000 "SEGGER RTT"`

Then, after rtt start I got following error:
~~~
Polling target nrf51.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Previous state query failed, trying to reconnect
~~~

1. There is no way to stop it, `rtt stop`doesn't help.
2. I guess it implies JTAG usage, but rtt is a mere monitoring of a certain 
memory area, it should work with SWD?



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