UART and RTT

RE: UART and RTT

neepin — Thu, 14 Dec 2017 06:36:29 GMT

I am experiencing this issue as well, when logging volume goes up, the RTT output stops but normal program execution continues. Using the latest version of segger's tools with PCA10040 devkits

RE: UART and RTT

Kevin Kessler — Wed, 26 Oct 2016 04:56:11 GMT

I'm using JLink_V610d and the firmware is dated Sept 1,2016, which is as new as I can find. I can also guarantee that the device is not resetting and sitting in an error loop, because it continues to operate normally after RTT stops logging; the other MCU is getting serial data, and nRFConnect stays connected to the device, and I can interact with my BLE service.

I spent the last couple of days working on trying to get a service value to be stored in flash and not working on any of the serial code, and RTT was happily logging, even when it crashed into the error handler, where I use RTT to log the code, file and line number. It's just as soon as I start sending just a few bytes of data through the UART, RTT stops logging, but everything else keeps running.

RE: UART and RTT

Ole Bauck — Mon, 24 Oct 2016 10:37:37 GMT

Can you try to update the jlink firmware to the latest version as well as using the newest RTT viewer (located in the install folder of the newest firmware)?

Is your code resetting for some reason? This can be an the application running into an error condition (the default behavior is resetting the chip, see here). I believe in earlier jlink/RTT version the RTT logging stopped working if the chip was reset.