Tracing on Nordic Semiconductor nRF52
This article describes how to get started with trace on the Nordic Semiconductor nRF52 series. This article assumes that there is already a basic knowledge about trace in general (what is trace, what different implementations of trace are there, etc.). If this is not the case, we recommend to read Trace chapter in the J-Link User Manual (UM08001). The Nordic Semiconductor nRF52 series implements tracing via pins only, so a J-Trace is needed to perform tracing on these devices.
In order to use trace on the Nordic Semiconductor nRF52 series devices, the following minimum requirements have to be met:
- J-Link software version V6.18c or later
- Ozone V2.46a or later (if streaming trace and / or the sample project from below shall be used)
- J-Trace PRO for Cortex-M HW version V1.0 or later
The following sample project is designed to be used with J-Trace PRO and Ozone to demonstrate streaming trace. The project has been tested with the minimum requirements mentioned above and a PCA10040 V0.9.0. The sample project comes with a pre-configured project file for Ozone that runs out-of-the box on any Nordic Semiconductor nRF52 that has the Tracepins connected. In order to rebuild the sample project, SEGGER Embedded Studio can be used.
Note: The example is shipped with a compiled .JLinkScriptfile, should you need the original source it can be requested at email@example.com
To create your own .JLinkScriptfile you can use the following project as reference: Tracing on SEGGER_Cortex-M_Trace_Reference_Board
The Nordic Semiconductor nRF52 MCU uses a traceclock that is independend from the cpu clock. By hardware it is limited to maximum 16 MHz TCLK.