Viewing output of printf in Kinetis Design Studio's Console

[pedrovalladares]

I am using the Windows version 3.2.0 of Kinetis Design Studio with SDK2.0 and I want to be able to send my debug printf's to the IDE's console not the UART's. When I create a project, it always seems to assume the user wants to use the UART as output and I have not figured out how to change that. Is there a way to send my prints to the IDE's console window? I am using the KL82z dev kit. I tried commenting out the call to the debug console init, but that only stops my printf's showing in the UART terminal.

Thanks in advance!

[BlackNight]

Hello,

semihosting (printing through interrupts and the debug connection) is different depending on which SDK version you are using. I assume you are using the SDK V2, then have a look how I managed it to get it working: Semihosting (again!) with NXP Kinetis SDK V2.0 | MCU on Eclipse 

If using a Segger probe, I recommend to use the Segger RTT instead: it is much faster, much less intrusive and it simply works with and without the SDK: Using Segger Real Time Terminal (RTT) with Eclipse | MCU on Eclipse 

You can use either the Segger viewer, or any telnet client.

I hope this helps,

Erich

[danieltruong]

Hi Erich,

I followed your recommendation using Segger RTT. It finally works for me with the telnet client.

However, I had to exclude the file "SEGGER_RTT_Syscalls_GCC.c" out of build otherwise the KDS builder gave me error. Don't know what I'd be missing out without that file. But so far it's been working with 2 commands I use the most (SEGGER_RTT_WriteString, SEGGER_RTT_printf).

Thank you so much for your valuable contribution to the community!

-Daniel

[danieltruong]

Hi Pedro,

I'm just wondering whether or not you have found the solution. If you have, could you please kindly share it to me? I'm currently having same problem. I'm using FRDM-KL26Z4 board connected to a 3rd-party debug probe (Segger J-Link) via SWD. I choose not to use the default USB-OpenSDA via UART0 on this development board, because my eventual target board does not have this connection and I want to build a generic method of printing debug messages that apply to both the FRDM-KL26Z4 board and my target board.

BTW, I followed the app note "How to use printf() to print string to Console and UART in KDS2.0" but could never make it to work.

Thanks,

--Daniel

[ivadorazinova]

Hi Pedro.

Please, refer to How to use printf() to print string to Console and UART in KDS2.0

I hope it helps you.

Best Regards,

Iva