[SOLVED] zephyr with J-scope , when use swd RTT mode, always get "Failed to start RTT Sampling."

darkknight · Aug 9th 2022, 9:43am

Hardware：nrf52dk j-link OB J-scope version：v7.7.0
Hi，everyone：
I tried HSS mode, but it can't meet my needs.
When I use RTT mode, the configuration is as follows
test code

C Source Code

uint32_t zd = 0;
while (true)
{
zd++;
LOG_PRINTK("JScope_u4 %d\n", zd);
k_sleep(2000);
}

RTT viewer ok:

Source Code

JScope_u4 2
JScope_u4 3
JScope_u4 4
JScope_u4 5

but, J-scope has been reprting the following errors

Source Code

Failed to start RTT Sampling.
No RTT Channel named JScope_%Format% found

darkknight · Aug 9th 2022, 9:44am

[img]https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1659671209604v1.png[/img]

[img]https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1659671466286v3.png[/img]
[img]https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1659671394014v2.png[/img]

SEGGER - Matthias · Oct 17th 2022, 4:06pm

Hello,

please see our wiki regarding the use of J-Scope with RTT.
wiki.segger.com/UM08028_J-Scop…on_to_use_it_with_J-Scope

Your usage simply logs a string to an RTT buffer. With J-Scope you need to create a RTT buffer and write the values of the variables into it.

Best regards,
Matthias

[SOLVED] zephyr with J-scope , when use swd RTT mode, always get "Failed to start RTT Sampling."

[SOLVED] zephyr with J-scope , when use swd RTT mode, always get "Failed to start RTT Sampling."

C Source Code

Source Code

Source Code

Share

Tags